TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Andreea
AU  - Mihailescu, Ion N.
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketic, Zdravko
AU  - Provatas, George
AU  - Jaksic, Milko
AU  - Janaćković, Đorđe
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4996
AB  - Anodization was used to obtain a nanotubular TiO2 photoanode on F-SnO2 glass. Subsequent annealing in the CH4 atmosphere promoted the C-doping and improved the crystallinity of the TiO2 nanotubes. The pulsed laser deposition was applied to cover the nanotubes with Bi2O3, serving as a hole transport material. X-ray photoelectron spectroscopy analyses of the doped samples reveal a shift in the valence band's maximum position towards lower binding energy as compared to those observed for the undoped samples (annealed in the air). The doping positively affects the absorption by shifting the absorption edge to 567 nm. I-V measurements under illumination show that the C-doping of TiO2 increases the current density following the absorbance results. The highest open circuit voltage was reached for the samples with the 300 degrees C-deposited Bi2O3 layer, pointing to better quality of the p-n junction, hence of the contact between Bi2O3 and TiO2. This in situ annealing provided the formation of close contact between Bi2O3 and TiO2, which enabled a faster charge transport as compared to the contact obtained with no annealing or even with post annealing.
T2  - Ceramics International
T1  - C-doped TiO2 nanotubes with pulsed laser deposited Bi2O3 films for photovoltaic application
EP  - 4657
IS  - 4
SP  - 4649
VL  - 48
DO  - 10.1016/j.ceramint.2021.10.251
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Stan, George E. and Socol, Gabriel and Mihailescu, Andreea and Mihailescu, Ion N. and Veltruska, Katerina and Matolin, Vladimir and Siketic, Zdravko and Provatas, George and Jaksic, Milko and Janaćković, Đorđe",
year = "2022",
abstract = "Anodization was used to obtain a nanotubular TiO2 photoanode on F-SnO2 glass. Subsequent annealing in the CH4 atmosphere promoted the C-doping and improved the crystallinity of the TiO2 nanotubes. The pulsed laser deposition was applied to cover the nanotubes with Bi2O3, serving as a hole transport material. X-ray photoelectron spectroscopy analyses of the doped samples reveal a shift in the valence band's maximum position towards lower binding energy as compared to those observed for the undoped samples (annealed in the air). The doping positively affects the absorption by shifting the absorption edge to 567 nm. I-V measurements under illumination show that the C-doping of TiO2 increases the current density following the absorbance results. The highest open circuit voltage was reached for the samples with the 300 degrees C-deposited Bi2O3 layer, pointing to better quality of the p-n junction, hence of the contact between Bi2O3 and TiO2. This in situ annealing provided the formation of close contact between Bi2O3 and TiO2, which enabled a faster charge transport as compared to the contact obtained with no annealing or even with post annealing.",
journal = "Ceramics International",
title = "C-doped TiO2 nanotubes with pulsed laser deposited Bi2O3 films for photovoltaic application",
pages = "4657-4649",
number = "4",
volume = "48",
doi = "10.1016/j.ceramint.2021.10.251"
}

Bjelajac, A., Petrović, R., Stan, G. E., Socol, G., Mihailescu, A., Mihailescu, I. N., Veltruska, K., Matolin, V., Siketic, Z., Provatas, G., Jaksic, M.,& Janaćković, Đ.. (2022). C-doped TiO2 nanotubes with pulsed laser deposited Bi2O3 films for photovoltaic application. in Ceramics International, 48(4), 4649-4657.
https://doi.org/10.1016/j.ceramint.2021.10.251

Bjelajac A, Petrović R, Stan GE, Socol G, Mihailescu A, Mihailescu IN, Veltruska K, Matolin V, Siketic Z, Provatas G, Jaksic M, Janaćković Đ. C-doped TiO2 nanotubes with pulsed laser deposited Bi2O3 films for photovoltaic application. in Ceramics International. 2022;48(4):4649-4657.
doi:10.1016/j.ceramint.2021.10.251 .

Bjelajac, Anđelika, Petrović, Rada, Stan, George E., Socol, Gabriel, Mihailescu, Andreea, Mihailescu, Ion N., Veltruska, Katerina, Matolin, Vladimir, Siketic, Zdravko, Provatas, George, Jaksic, Milko, Janaćković, Đorđe, "C-doped TiO2 nanotubes with pulsed laser deposited Bi2O3 films for photovoltaic application" in Ceramics International, 48, no. 4 (2022):4649-4657,
https://doi.org/10.1016/j.ceramint.2021.10.251 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Bjelajac, Anđelika
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, Georgios
AU  - Jakšić, Milko
AU  - Stan, George
AU  - Socol, Gabriel
AU  - Mihailescu, Ion
AU  - Pavlović, Vladimir B.
AU  - Janaćković, Đorđe
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5173
AB  - Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.
PB  - ETRAN
T2  - Science of Sintering
T1  - TiO2 nanotubes film/FTO glass interface: Thermal treatment effects
EP  - 248
IS  - 2
SP  - 235
VL  - 54
DO  - 10.2298/SOS2202235V
UR  - https://hdl.handle.net/21.15107/rcub_dais_13160
ER  - 

@article{
author = "Vujančević, Jelena and Bjelajac, Anđelika and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, Georgios and Jakšić, Milko and Stan, George and Socol, Gabriel and Mihailescu, Ion and Pavlović, Vladimir B. and Janaćković, Đorđe",
year = "2022",
abstract = "Pure Ti films deposited by radio-frequency magnetron sputtering on FTO glass were anodized to fabricate TiO2 nanotubes (NTs) arrays. The TiO2 NTs/FTO samples were sintered at 450, 550 and 630°C, in ambient air. The thermal treatment did not influence the crystal phase composition, preserving in all cases the anatase single phase. As expected, the crystalline anatase quality improved with the annealing temperature. Nevertheless, slight differences in nanotubular morphology, such as the appearance of grains inside the walls, were observed in the case of the sample sintered at 630°C. Chemical analysis by X-ray Photoelectron Spectroscopy of annealed samples revealed the presence of Sn inside TiO2 NTs, due to diffusion of Sn from the substrate to TiO2. For the substrate was used FTO glass whose top layer consists of SnO2 doped with F. Rutherford Backscattering Spectrometry and Time-of-Flight Elastic Recoil Detection Analysis were carried out to study the elemental depth profile of the films. It was found that the temperature of sintering controls the Sn diffusion inside TiO2 film. Sn atoms diffuse towards the TiO2 NTs surface for the samples annealed at 450 and 550°C. The diffusion is however hindered in the case of the heat treatment at 630°C. Besides, the Ti diffusion into the SnO2 underlayer was observed, together with the formation of TiO2/SnO2 interfaces. One then expected but not a great difference in absorption between samples, since all contained anatase phase, as confirmed by Diffuse Reflectance Spectroscopy. A higher amount of Sn was however detected for the sample annealed at 550°C, which accounts for a slight red absorption shift. The importance of controlling the annealing parameters of the anodized TiO2/FTO structures was highlighted through the formation of TiO2-SnO2 interfaces and the Sn insertion from FTO, which can play an essential role in increasing the photoperformances of TiO2 NTs/FTO based structures of photovoltaic cells.",
publisher = "ETRAN",
journal = "Science of Sintering",
title = "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects",
pages = "248-235",
number = "2",
volume = "54",
doi = "10.2298/SOS2202235V",
url = "https://hdl.handle.net/21.15107/rcub_dais_13160"
}

Vujančević, J., Bjelajac, A., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G., Socol, G., Mihailescu, I., Pavlović, V. B.,& Janaćković, Đ.. (2022). TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering
ETRAN., 54(2), 235-248.
https://doi.org/10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160

Vujančević J, Bjelajac A, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan G, Socol G, Mihailescu I, Pavlović VB, Janaćković Đ. TiO2 nanotubes film/FTO glass interface: Thermal treatment effects. in Science of Sintering. 2022;54(2):235-248.
doi:10.2298/SOS2202235V
https://hdl.handle.net/21.15107/rcub_dais_13160 .

Vujančević, Jelena, Bjelajac, Anđelika, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, Georgios, Jakšić, Milko, Stan, George, Socol, Gabriel, Mihailescu, Ion, Pavlović, Vladimir B., Janaćković, Đorđe, "TiO2 nanotubes film/FTO glass interface: Thermal treatment effects" in Science of Sintering, 54, no. 2 (2022):235-248,
https://doi.org/10.2298/SOS2202235V .,
https://hdl.handle.net/21.15107/rcub_dais_13160 .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Vujančević, Jelena
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, George
AU  - Jakšić, Milko
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4723
AB  - We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F-SnO2 (FTO) glass. Annealing was carried out at 500 degrees C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO(2 )nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes' surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Journal of Physics and Chemistry of Solids
T1  - Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye
VL  - 147
DO  - 10.1016/j.jpcs.2020.109609
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Vujančević, Jelena and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, George and Jakšić, Milko and Stan, George E. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2020",
abstract = "We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F-SnO2 (FTO) glass. Annealing was carried out at 500 degrees C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO(2 )nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes' surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Journal of Physics and Chemistry of Solids",
title = "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye",
volume = "147",
doi = "10.1016/j.jpcs.2020.109609"
}

Bjelajac, A., Petrović, R., Vujančević, J., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G. E., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2020). Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids
Pergamon-Elsevier Science Ltd, Oxford., 147.
https://doi.org/10.1016/j.jpcs.2020.109609

Bjelajac A, Petrović R, Vujančević J, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan GE, Socol G, Mihailescu IN, Janaćković Đ. Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids. 2020;147.
doi:10.1016/j.jpcs.2020.109609 .

Bjelajac, Anđelika, Petrović, Rada, Vujančević, Jelena, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, George, Jakšić, Milko, Stan, George E., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye" in Journal of Physics and Chemistry of Solids, 147 (2020),
https://doi.org/10.1016/j.jpcs.2020.109609 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Vujančević, Jelena
AU  - Veltruska, Katerina
AU  - Matolin, Vladimir
AU  - Siketić, Zdravko
AU  - Provatas, George
AU  - Jakšić, Milko
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4396
AB  - We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F-SnO2 (FTO) glass. Annealing was carried out at 500 degrees C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO(2 )nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes' surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Journal of Physics and Chemistry of Solids
T1  - Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye
SP  - 109609
VL  - 147
DO  - 10.1016/j.jpcs.2020.109609
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Vujančević, Jelena and Veltruska, Katerina and Matolin, Vladimir and Siketić, Zdravko and Provatas, George and Jakšić, Milko and Stan, George E. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2020",
abstract = "We fabricated Sn-doped TiO2 nanotubular film via annealing of anodized TiO2 nanotubes grown on F-SnO2 (FTO) glass. Annealing was carried out at 500 degrees C in ambient air. Anatase crystal structure was achieved with no change in nanotubular morphology in respect to as-anodized amorphous TiO(2 )nanotubes. The X-ray photoelectron spectroscopy analysis revealed Sn on the surface of TiO2 film, following the thermal treatment, probably caused by the diffusion from FTO glass. Depth profile examination of the film chemical composition was conducted by elastic recoil detection analysis, which showed that in addition to the diffusion of Sn from FTO, diffusion of Ti to FTO concurrently occurred. Thus, a higher concentration of Sn was found at the bottom of the tubes, while a lower concentration was present on the tubes' surface top. This explains the improved optical response revealed by a diffuse reflectance spectroscopy. The absorption enhancement demonstrated that Sn-doped TiO2 film was efficient in the degradation of methyl orange dye under visible light.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Journal of Physics and Chemistry of Solids",
title = "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye",
pages = "109609",
volume = "147",
doi = "10.1016/j.jpcs.2020.109609"
}

Bjelajac, A., Petrović, R., Vujančević, J., Veltruska, K., Matolin, V., Siketić, Z., Provatas, G., Jakšić, M., Stan, G. E., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2020). Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids
Pergamon-Elsevier Science Ltd, Oxford., 147, 109609.
https://doi.org/10.1016/j.jpcs.2020.109609

Bjelajac A, Petrović R, Vujančević J, Veltruska K, Matolin V, Siketić Z, Provatas G, Jakšić M, Stan GE, Socol G, Mihailescu IN, Janaćković Đ. Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye. in Journal of Physics and Chemistry of Solids. 2020;147:109609.
doi:10.1016/j.jpcs.2020.109609 .

Bjelajac, Anđelika, Petrović, Rada, Vujančević, Jelena, Veltruska, Katerina, Matolin, Vladimir, Siketić, Zdravko, Provatas, George, Jakšić, Milko, Stan, George E., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Sn-doped TiO2 nanotubular thin film for photocatalytic degradation of methyl orange dye" in Journal of Physics and Chemistry of Solids, 147 (2020):109609,
https://doi.org/10.1016/j.jpcs.2020.109609 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5027
AB  - The ∼60 nm wide and ∼2 μm long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.
PB  - Elsevier Ltd
T2  - Thin Solid Films
T1  - Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air
SP  - 137598
VL  - 692
DO  - 10.1016/j.tsf.2019.137598
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Popović, Maja and Rakočević, Zlatko Lj. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2019",
abstract = "The ∼60 nm wide and ∼2 μm long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.",
publisher = "Elsevier Ltd",
journal = "Thin Solid Films",
title = "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air",
pages = "137598",
volume = "692",
doi = "10.1016/j.tsf.2019.137598"
}

Bjelajac, A., Petrović, R., Popović, M., Rakočević, Z. Lj., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2019). Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films
Elsevier Ltd., 692, 137598.
https://doi.org/10.1016/j.tsf.2019.137598

Bjelajac A, Petrović R, Popović M, Rakočević ZL, Socol G, Mihailescu IN, Janaćković Đ. Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films. 2019;692:137598.
doi:10.1016/j.tsf.2019.137598 .

Bjelajac, Anđelika, Petrović, Rada, Popović, Maja, Rakočević, Zlatko Lj., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air" in Thin Solid Films, 692 (2019):137598,
https://doi.org/10.1016/j.tsf.2019.137598 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4092
AB  - The similar to 60 nm wide and similar to 2 mu m long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air
SP  - 137598
VL  - 692
DO  - 10.1016/j.tsf.2019.137598
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Popović, Maja and Rakočević, Zlatko Lj. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2019",
abstract = "The similar to 60 nm wide and similar to 2 mu m long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air",
pages = "137598",
volume = "692",
doi = "10.1016/j.tsf.2019.137598"
}

Bjelajac, A., Petrović, R., Popović, M., Rakočević, Z. Lj., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2019). Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films
Elsevier Science Sa, Lausanne., 692, 137598.
https://doi.org/10.1016/j.tsf.2019.137598

Bjelajac A, Petrović R, Popović M, Rakočević ZL, Socol G, Mihailescu IN, Janaćković Đ. Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air. in Thin Solid Films. 2019;692:137598.
doi:10.1016/j.tsf.2019.137598 .

Bjelajac, Anđelika, Petrović, Rada, Popović, Maja, Rakočević, Zlatko Lj., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air" in Thin Solid Films, 692 (2019):137598,
https://doi.org/10.1016/j.tsf.2019.137598 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Đokić, Veljko
AU  - Matolin, Vladimir
AU  - Vondracek, Martin
AU  - Dembele, Kassioge
AU  - Moldovan, Simona
AU  - Ersen, Ovidiu
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3933
AB  - Anodization of titanium film sputtered on fluorine doped tin oxide (FTO) glass was performed to obtain highly ordered approximate to 2 m long and approximate to 60 nm wide TiO2 nanotubes. The titania films were annealed in ammonia atmosphere to enable the doping with N. The annealing did not affect the nanotubular morphology and the porosity remained open which is a very important requirement for further deposition of CdS quantum dots. The analysis done by transmission electron microscopy (TEM) has shown that the N-doped nanotubes have a smaller interplanar distance as compared to the undoped ones, whose interplanar distance corresponded to anatase phase. This difference was attributed to the N doping and the Sn migration from the substrate, as demonstrated by energy dispersive spectroscopy (EDS) combined with electron energy loss spectroscopy (EELS). The near edge X-ray absorption fine structure (NEXAFS) analysis clearly demonstrated that also the doped TiO2 film has anatase phase. Regarding the chemical composition of the studied samples, the X-ray photoelectron spectroscopy (XPS) and synchrotron radiation photoelectron spectroscopy (SRPES) analyses have shown that N is incorporated both interstitially and substitutionally in the TiO2 lattice, with a decreased contribution of the interstitial after ionic sputtering. The shift of the valence band maximum (VBM) position for the doped TiO(2)vs. the undoped TiO2 proved the narrowing of the band gap. The CdS/TiO2 films show bigger VBM shifting that can be attributed to CdS deposit. Comparing the absorption spectra of the bare undoped and doped TiO2 samples, it was noticed that the doping causes a red shift from 397 to 465 nm. Furthermore, the CdS deposition additionally enhances the absorption in the visible range (575 nm for undoped TiO2/CdS and 560 nm for doped TiO2/CdS films).
PB  - Royal Soc Chemistry, Cambridge
T2  - RSC Advances
T1  - Enhanced absorption of TiO2 nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure
EP  - 35082
IS  - 61
SP  - 35073
VL  - 8
DO  - 10.1039/c8ra06341a
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Đokić, Veljko and Matolin, Vladimir and Vondracek, Martin and Dembele, Kassioge and Moldovan, Simona and Ersen, Ovidiu and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2018",
abstract = "Anodization of titanium film sputtered on fluorine doped tin oxide (FTO) glass was performed to obtain highly ordered approximate to 2 m long and approximate to 60 nm wide TiO2 nanotubes. The titania films were annealed in ammonia atmosphere to enable the doping with N. The annealing did not affect the nanotubular morphology and the porosity remained open which is a very important requirement for further deposition of CdS quantum dots. The analysis done by transmission electron microscopy (TEM) has shown that the N-doped nanotubes have a smaller interplanar distance as compared to the undoped ones, whose interplanar distance corresponded to anatase phase. This difference was attributed to the N doping and the Sn migration from the substrate, as demonstrated by energy dispersive spectroscopy (EDS) combined with electron energy loss spectroscopy (EELS). The near edge X-ray absorption fine structure (NEXAFS) analysis clearly demonstrated that also the doped TiO2 film has anatase phase. Regarding the chemical composition of the studied samples, the X-ray photoelectron spectroscopy (XPS) and synchrotron radiation photoelectron spectroscopy (SRPES) analyses have shown that N is incorporated both interstitially and substitutionally in the TiO2 lattice, with a decreased contribution of the interstitial after ionic sputtering. The shift of the valence band maximum (VBM) position for the doped TiO(2)vs. the undoped TiO2 proved the narrowing of the band gap. The CdS/TiO2 films show bigger VBM shifting that can be attributed to CdS deposit. Comparing the absorption spectra of the bare undoped and doped TiO2 samples, it was noticed that the doping causes a red shift from 397 to 465 nm. Furthermore, the CdS deposition additionally enhances the absorption in the visible range (575 nm for undoped TiO2/CdS and 560 nm for doped TiO2/CdS films).",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "RSC Advances",
title = "Enhanced absorption of TiO2 nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure",
pages = "35082-35073",
number = "61",
volume = "8",
doi = "10.1039/c8ra06341a"
}

Bjelajac, A., Petrović, R., Đokić, V., Matolin, V., Vondracek, M., Dembele, K., Moldovan, S., Ersen, O., Socol, G., Mihailescu, I. N.,& Janaćković, Đ.. (2018). Enhanced absorption of TiO2 nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure. in RSC Advances
Royal Soc Chemistry, Cambridge., 8(61), 35073-35082.
https://doi.org/10.1039/c8ra06341a

Bjelajac A, Petrović R, Đokić V, Matolin V, Vondracek M, Dembele K, Moldovan S, Ersen O, Socol G, Mihailescu IN, Janaćković Đ. Enhanced absorption of TiO2 nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure. in RSC Advances. 2018;8(61):35073-35082.
doi:10.1039/c8ra06341a .

Bjelajac, Anđelika, Petrović, Rada, Đokić, Veljko, Matolin, Vladimir, Vondracek, Martin, Dembele, Kassioge, Moldovan, Simona, Ersen, Ovidiu, Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, "Enhanced absorption of TiO2 nanotubes by N-doping and CdS quantum dots sensitization: insight into the structure" in RSC Advances, 8, no. 61 (2018):35073-35082,
https://doi.org/10.1039/c8ra06341a . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Petrović, Rada
AU  - Bundaleski, Nenad
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Rakočević, Zlatko Lj.
AU  - Janaćković, Đorđe
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3631
AB  - A process of obtaining N-doped TiO2 nanotubes sensitized by CdS nanoparticles is presented, including detailed characterizations performed along the synthesis. Transparent TiO2 films consisting of nanotubes, 2.5 mu m long and of similar to 60 nm inner diameter, were obtained after anodization of a titanium film deposited onto FTO glass substrate. N-doping was achieved by annealing of TiO2 film in ammonia. X-ray Photoelectron Spectroscopy measurements showed that nitrogen was substitutionally incorporated in the TiO2 matrix, with the N:Ti concentration ratio of 1:100. The doping changed the optical properties of the material in such a way that the absorption edge was shifted from 380 nm to 507 nm, as observed from diffuse reflectance spectra. The influence of the microwave (MW) irradiation on the synthesized CdS quantum dots and their optical properties was investigated. It was shown that the diameter of CdS nanoparticles was increased due to releasing of S-2-ions from dimethyl sulfoxide (DMSO) as a consequence of the MW treatment. The (N)TiO2 films were then used as substrates for matrix assisted pulsed laser deposition of the CdS quantum dots with DMSO as a matrix. The laser parameters for the deposition were optimized in order to preserve the nanotubular structure open, the latter being an important feature of this type of photoanode. The structure obtained under optimized conditions has an additional absorption edge shift, reaching 603 nm.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots
EP  - 15046
IS  - 17
SP  - 15040
VL  - 43
DO  - 10.1016/j.ceramint.2017.08.029
ER  - 

@article{
author = "Bjelajac, Anđelika and Đokić, Veljko and Petrović, Rada and Bundaleski, Nenad and Socol, Gabriel and Mihailescu, Ion N. and Rakočević, Zlatko Lj. and Janaćković, Đorđe",
year = "2017",
abstract = "A process of obtaining N-doped TiO2 nanotubes sensitized by CdS nanoparticles is presented, including detailed characterizations performed along the synthesis. Transparent TiO2 films consisting of nanotubes, 2.5 mu m long and of similar to 60 nm inner diameter, were obtained after anodization of a titanium film deposited onto FTO glass substrate. N-doping was achieved by annealing of TiO2 film in ammonia. X-ray Photoelectron Spectroscopy measurements showed that nitrogen was substitutionally incorporated in the TiO2 matrix, with the N:Ti concentration ratio of 1:100. The doping changed the optical properties of the material in such a way that the absorption edge was shifted from 380 nm to 507 nm, as observed from diffuse reflectance spectra. The influence of the microwave (MW) irradiation on the synthesized CdS quantum dots and their optical properties was investigated. It was shown that the diameter of CdS nanoparticles was increased due to releasing of S-2-ions from dimethyl sulfoxide (DMSO) as a consequence of the MW treatment. The (N)TiO2 films were then used as substrates for matrix assisted pulsed laser deposition of the CdS quantum dots with DMSO as a matrix. The laser parameters for the deposition were optimized in order to preserve the nanotubular structure open, the latter being an important feature of this type of photoanode. The structure obtained under optimized conditions has an additional absorption edge shift, reaching 603 nm.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots",
pages = "15046-15040",
number = "17",
volume = "43",
doi = "10.1016/j.ceramint.2017.08.029"
}

Bjelajac, A., Đokić, V., Petrović, R., Bundaleski, N., Socol, G., Mihailescu, I. N., Rakočević, Z. Lj.,& Janaćković, Đ.. (2017). Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots. in Ceramics International
Elsevier Sci Ltd, Oxford., 43(17), 15040-15046.
https://doi.org/10.1016/j.ceramint.2017.08.029

Bjelajac A, Đokić V, Petrović R, Bundaleski N, Socol G, Mihailescu IN, Rakočević ZL, Janaćković Đ. Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots. in Ceramics International. 2017;43(17):15040-15046.
doi:10.1016/j.ceramint.2017.08.029 .

Bjelajac, Anđelika, Đokić, Veljko, Petrović, Rada, Bundaleski, Nenad, Socol, Gabriel, Mihailescu, Ion N., Rakočević, Zlatko Lj., Janaćković, Đorđe, "Absorption boost of TiO2 nanotubes by doping with N and sensitization with CdS quantum dots" in Ceramics International, 43, no. 17 (2017):15040-15046,
https://doi.org/10.1016/j.ceramint.2017.08.029 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Enculescu, Monica
AU  - Grurriezescu, Valentina
AU  - Pavlović, Vladimir
AU  - Janaćković, Đorđe
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3430
AB  - Within this study a matrix assisted pulsed laser evaporation technique was employed for deposition of CdS quantum dots onto TiO2 nanotubes. The number of laser pulses and laser fluence were varied to control the amount of CdS deposit. TiO2 nanotubes were obtained via anodization technique of sputtered Ti film on FTO glass. For CdS synthesis, dimethyl sulfoxide (DMSO) was used as a matrix of the target which absorbs radiation of KrF* laser (lambda=248 nm), then evaporates enabling the deposition of CdS quantum dots dispersed into DMSO. This study showed that the size of the CdS nanoparticles synthetized in DMSO can be controlled with microwave treatment that causes the release of S2- ions from DMSO for creation of CdS nuclei and/or their further growth. The optimization of CdS synthesis is achieved by varying the duration of the microwave treatment and the microwave power. The obtained TiO2 photo anodes with different amounts of CdS were assembled with PbS cathodes and the polysulfide electrolyte was injected between. The influence of amount of CdS deposit and the microwave treatment of CdS on photovoltaic performance of the fabricated solar cells were analyzed under AM1.5. The results showed that microwave treatment produced a Cd(S)-DMSO complex onto CdS nanoparticles which led to a higher current density of the solar cells obtained using microwave treated CdS target. Also, the increase of CdS content by increasing the number of laser pulses provided the enhance of I-V characteristics of the solar cells.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - CdS quantum dots sensitized TiO2 nanotubes by matrix assisted pulsed laser evaporation method
EP  - 9017
IS  - 7
SP  - 9011
VL  - 42
DO  - 10.1016/j.ceramint.2016.02.159
ER  - 

@article{
author = "Bjelajac, Anđelika and Petrović, Rada and Socol, Gabriel and Mihailescu, Ion N. and Enculescu, Monica and Grurriezescu, Valentina and Pavlović, Vladimir and Janaćković, Đorđe",
year = "2016",
abstract = "Within this study a matrix assisted pulsed laser evaporation technique was employed for deposition of CdS quantum dots onto TiO2 nanotubes. The number of laser pulses and laser fluence were varied to control the amount of CdS deposit. TiO2 nanotubes were obtained via anodization technique of sputtered Ti film on FTO glass. For CdS synthesis, dimethyl sulfoxide (DMSO) was used as a matrix of the target which absorbs radiation of KrF* laser (lambda=248 nm), then evaporates enabling the deposition of CdS quantum dots dispersed into DMSO. This study showed that the size of the CdS nanoparticles synthetized in DMSO can be controlled with microwave treatment that causes the release of S2- ions from DMSO for creation of CdS nuclei and/or their further growth. The optimization of CdS synthesis is achieved by varying the duration of the microwave treatment and the microwave power. The obtained TiO2 photo anodes with different amounts of CdS were assembled with PbS cathodes and the polysulfide electrolyte was injected between. The influence of amount of CdS deposit and the microwave treatment of CdS on photovoltaic performance of the fabricated solar cells were analyzed under AM1.5. The results showed that microwave treatment produced a Cd(S)-DMSO complex onto CdS nanoparticles which led to a higher current density of the solar cells obtained using microwave treated CdS target. Also, the increase of CdS content by increasing the number of laser pulses provided the enhance of I-V characteristics of the solar cells.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "CdS quantum dots sensitized TiO2 nanotubes by matrix assisted pulsed laser evaporation method",
pages = "9017-9011",
number = "7",
volume = "42",
doi = "10.1016/j.ceramint.2016.02.159"
}

Bjelajac, A., Petrović, R., Socol, G., Mihailescu, I. N., Enculescu, M., Grurriezescu, V., Pavlović, V.,& Janaćković, Đ.. (2016). CdS quantum dots sensitized TiO2 nanotubes by matrix assisted pulsed laser evaporation method. in Ceramics International
Elsevier Sci Ltd, Oxford., 42(7), 9011-9017.
https://doi.org/10.1016/j.ceramint.2016.02.159

Bjelajac A, Petrović R, Socol G, Mihailescu IN, Enculescu M, Grurriezescu V, Pavlović V, Janaćković Đ. CdS quantum dots sensitized TiO2 nanotubes by matrix assisted pulsed laser evaporation method. in Ceramics International. 2016;42(7):9011-9017.
doi:10.1016/j.ceramint.2016.02.159 .

Bjelajac, Anđelika, Petrović, Rada, Socol, Gabriel, Mihailescu, Ion N., Enculescu, Monica, Grurriezescu, Valentina, Pavlović, Vladimir, Janaćković, Đorđe, "CdS quantum dots sensitized TiO2 nanotubes by matrix assisted pulsed laser evaporation method" in Ceramics International, 42, no. 7 (2016):9011-9017,
https://doi.org/10.1016/j.ceramint.2016.02.159 . .

TY  - JOUR
AU  - Janković, Ana
AU  - Eraković, Sanja
AU  - Ristoscu, Carmen
AU  - Mihailescu, Ion N.
AU  - Duta, L.
AU  - Visan, A.
AU  - Stan, George E.
AU  - Popa, A. C.
AU  - Husanu, M. A.
AU  - Luculescu, C. R.
AU  - Srdić, Vladimir V.
AU  - Janaćković, Đorđe
AU  - Mišković-Stanković, Vesna
AU  - Bleotu, C.
AU  - Chifiriuc, M. C.
AU  - Mihailescu, Ion N.
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3042
AB  - We report on thin film deposition by matrix-assisted pulsed laser evaporation of simple hydroxyapatite (HA) or silver (Ag) doped HA combined with the natural biopolymer organosolv lignin (Lig) (Ag:HA-Lig). Solid cryogenic target of aqueous dispersions of Ag:HA-Lig composite and its counterpart without silver (HA-Lig) were prepared for evaporation using a KrF* excimer laser source. The expulsed material was assembled onto TiO2/Ti substrata or silicon wafers and subjected to physical-chemical investigations. Smooth, uniform films adherent to substratum were observed. The chemical analyses confirmed the presence of the HA components, but also evidenced traces of Ag and Lig. Deposited HA was Ca deficient, which is indicative of a film with increased solubility. Recorded X-ray Diffraction patterns were characteristic for amorphous films. Lig presence in thin films was undoubtedly proved by both X-ray Photoelectron and Fourier Transform Infra-Red Spectroscopy analyses. The microbiological evaluation showed that the newly assembled surfaces exhibited an inhibitory activity both on the initial steps of biofilm forming, and on mature bacterial and fungal biofilm development. The intensity of the antibiofilm activity was positively influenced by the presence of the Lig and/or Ag, in the case of Staphylococcus aureus, Pseudomonas aeruginosa and Candida famata biofilms. The obtained surfaces exhibited a low cytotoxicity toward human mesenchymal stem cells, being therefore promising candidates for fabricating implantable biomaterials with increased biocompatibility and resistance to microbial colonization and further biofilm development.
PB  - Springer, Dordrecht
T2  - Journal of Materials Science-Materials in Medicine
T1  - Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation
IS  - 1
VL  - 26
DO  - 10.1007/s10856-014-5333-y
ER  - 

@article{
author = "Janković, Ana and Eraković, Sanja and Ristoscu, Carmen and Mihailescu, Ion N. and Duta, L. and Visan, A. and Stan, George E. and Popa, A. C. and Husanu, M. A. and Luculescu, C. R. and Srdić, Vladimir V. and Janaćković, Đorđe and Mišković-Stanković, Vesna and Bleotu, C. and Chifiriuc, M. C. and Mihailescu, Ion N.",
year = "2015",
abstract = "We report on thin film deposition by matrix-assisted pulsed laser evaporation of simple hydroxyapatite (HA) or silver (Ag) doped HA combined with the natural biopolymer organosolv lignin (Lig) (Ag:HA-Lig). Solid cryogenic target of aqueous dispersions of Ag:HA-Lig composite and its counterpart without silver (HA-Lig) were prepared for evaporation using a KrF* excimer laser source. The expulsed material was assembled onto TiO2/Ti substrata or silicon wafers and subjected to physical-chemical investigations. Smooth, uniform films adherent to substratum were observed. The chemical analyses confirmed the presence of the HA components, but also evidenced traces of Ag and Lig. Deposited HA was Ca deficient, which is indicative of a film with increased solubility. Recorded X-ray Diffraction patterns were characteristic for amorphous films. Lig presence in thin films was undoubtedly proved by both X-ray Photoelectron and Fourier Transform Infra-Red Spectroscopy analyses. The microbiological evaluation showed that the newly assembled surfaces exhibited an inhibitory activity both on the initial steps of biofilm forming, and on mature bacterial and fungal biofilm development. The intensity of the antibiofilm activity was positively influenced by the presence of the Lig and/or Ag, in the case of Staphylococcus aureus, Pseudomonas aeruginosa and Candida famata biofilms. The obtained surfaces exhibited a low cytotoxicity toward human mesenchymal stem cells, being therefore promising candidates for fabricating implantable biomaterials with increased biocompatibility and resistance to microbial colonization and further biofilm development.",
publisher = "Springer, Dordrecht",
journal = "Journal of Materials Science-Materials in Medicine",
title = "Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation",
number = "1",
volume = "26",
doi = "10.1007/s10856-014-5333-y"
}

Janković, A., Eraković, S., Ristoscu, C., Mihailescu, I. N., Duta, L., Visan, A., Stan, G. E., Popa, A. C., Husanu, M. A., Luculescu, C. R., Srdić, V. V., Janaćković, Đ., Mišković-Stanković, V., Bleotu, C., Chifiriuc, M. C.,& Mihailescu, I. N.. (2015). Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation. in Journal of Materials Science-Materials in Medicine
Springer, Dordrecht., 26(1).
https://doi.org/10.1007/s10856-014-5333-y

Janković A, Eraković S, Ristoscu C, Mihailescu IN, Duta L, Visan A, Stan GE, Popa AC, Husanu MA, Luculescu CR, Srdić VV, Janaćković Đ, Mišković-Stanković V, Bleotu C, Chifiriuc MC, Mihailescu IN. Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation. in Journal of Materials Science-Materials in Medicine. 2015;26(1).
doi:10.1007/s10856-014-5333-y .

Janković, Ana, Eraković, Sanja, Ristoscu, Carmen, Mihailescu, Ion N., Duta, L., Visan, A., Stan, George E., Popa, A. C., Husanu, M. A., Luculescu, C. R., Srdić, Vladimir V., Janaćković, Đorđe, Mišković-Stanković, Vesna, Bleotu, C., Chifiriuc, M. C., Mihailescu, Ion N., "Structural and biological evaluation of lignin addition to simple and silver-doped hydroxyapatite thin films synthesized by matrix-assisted pulsed laser evaporation" in Journal of Materials Science-Materials in Medicine, 26, no. 1 (2015),
https://doi.org/10.1007/s10856-014-5333-y . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Petrović, Rada
AU  - Stan, George E.
AU  - Socol, Gabriel
AU  - Popescu-Pelin, G.
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3086
AB  - Titanium films sputtered on FTO glass were used for obtaining highly oriented titania nanotubes via anodization technique. Then, pulsed laser deposition of CdS was carried out for sensitizing of similar to 60 nm wide titania nanotubes by applying 50, 100, 150 or 200 subsequent laser pulses. Scanning electron microscopy was used to indicate which samples had the open nanotubular structure of titania preserved after the deposition of CdS. Energy dispersive spectroscopy showed that a higher number of applied laser pulses results in the increase of Cd and S quantity within samples. Pulsed laser deposition technique was also employed for the fabrication of PbS counter electrode. I-V characteristics of the photovoltaic cells consisting the obtained electrodes were measured and compared under one-sun illumination. The photovoltaic cell with photoanode sensitized with CdS by applying 150 laser pulses showed the highest current density and voltage among the investigated cell.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Pulsed laser deposition method for fabrication of cds/tio2 and pbs photoelectrodes for solar energy application
EP  - 1418
IS  - 4
SP  - 1411
VL  - 10
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3086
ER  - 

@article{
author = "Bjelajac, Anđelika and Đokić, Veljko and Petrović, Rada and Stan, George E. and Socol, Gabriel and Popescu-Pelin, G. and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2015",
abstract = "Titanium films sputtered on FTO glass were used for obtaining highly oriented titania nanotubes via anodization technique. Then, pulsed laser deposition of CdS was carried out for sensitizing of similar to 60 nm wide titania nanotubes by applying 50, 100, 150 or 200 subsequent laser pulses. Scanning electron microscopy was used to indicate which samples had the open nanotubular structure of titania preserved after the deposition of CdS. Energy dispersive spectroscopy showed that a higher number of applied laser pulses results in the increase of Cd and S quantity within samples. Pulsed laser deposition technique was also employed for the fabrication of PbS counter electrode. I-V characteristics of the photovoltaic cells consisting the obtained electrodes were measured and compared under one-sun illumination. The photovoltaic cell with photoanode sensitized with CdS by applying 150 laser pulses showed the highest current density and voltage among the investigated cell.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Pulsed laser deposition method for fabrication of cds/tio2 and pbs photoelectrodes for solar energy application",
pages = "1418-1411",
number = "4",
volume = "10",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3086"
}

Bjelajac, A., Đokić, V., Petrović, R., Stan, G. E., Socol, G., Popescu-Pelin, G., Mihailescu, I. N.,& Janaćković, Đ.. (2015). Pulsed laser deposition method for fabrication of cds/tio2 and pbs photoelectrodes for solar energy application. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 10(4), 1411-1418.
https://hdl.handle.net/21.15107/rcub_technorep_3086

Bjelajac A, Đokić V, Petrović R, Stan GE, Socol G, Popescu-Pelin G, Mihailescu IN, Janaćković Đ. Pulsed laser deposition method for fabrication of cds/tio2 and pbs photoelectrodes for solar energy application. in Digest Journal of Nanomaterials and Biostructures. 2015;10(4):1411-1418.
https://hdl.handle.net/21.15107/rcub_technorep_3086 .

Bjelajac, Anđelika, Đokić, Veljko, Petrović, Rada, Stan, George E., Socol, Gabriel, Popescu-Pelin, G., Mihailescu, Ion N., Janaćković, Đorđe, "Pulsed laser deposition method for fabrication of cds/tio2 and pbs photoelectrodes for solar energy application" in Digest Journal of Nanomaterials and Biostructures, 10, no. 4 (2015):1411-1418,
https://hdl.handle.net/21.15107/rcub_technorep_3086 .

TY  - JOUR
AU  - Eraković, Sanja
AU  - Janković, Ana
AU  - Ristoscu, Carmen
AU  - Duta, L.
AU  - Serban, N.
AU  - Visan, A.
AU  - Mihailescu, Ion N.
AU  - Stan, George E.
AU  - Socol, M.
AU  - Iordache, O.
AU  - Dumitrescu, I.
AU  - Luculescu, C. R.
AU  - Janaćković, Đorđe
AU  - Mišković-Stanković, Vesna
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2816
AB  - Hydroxyapatite (HA) is a widely used biomaterial for implant thin films, largely recognized for its excellent capability to chemically bond to hard tissue inducing the osteogenesis without immune response from human tissues. Nowadays, intense research efforts are focused on development of antimicrobial HA doped thin films. In particular, HA doped with Ag (Ag:HA) is expected to inhibit the attachment of microbes and contamination of metallic implant surface. We herewith report on nano-sized HA and Ag:HA thin films synthesized by pulsed laser deposition on pure Ti and Ti modified with 100 nm diameter TiO2 nanotubes (fabricated by anodization of Ti plates) substrates. The HA-based thin films were characterized by SEM, AFM, EDS, FUR, and XRD. The cytotoxic activity was tested with HEp2 cells against controls. The antifungal efficiency of the deposited layers was tested against the Candida albicans and Aspergillus niger strains. The Ti substrates modified with TiO2 nanotubes covered with Ag:HA thin films showed the highest antifungal activity.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Antifungal activity of Ag:hydroxyapatite thin films synthesized by pulsed laser deposition on Ti and Ti modified by TiO2 nanotubes substrates
EP  - 45
SP  - 37
VL  - 293
DO  - 10.1016/j.apsusc.2013.12.029
ER  - 

@article{
author = "Eraković, Sanja and Janković, Ana and Ristoscu, Carmen and Duta, L. and Serban, N. and Visan, A. and Mihailescu, Ion N. and Stan, George E. and Socol, M. and Iordache, O. and Dumitrescu, I. and Luculescu, C. R. and Janaćković, Đorđe and Mišković-Stanković, Vesna",
year = "2014",
abstract = "Hydroxyapatite (HA) is a widely used biomaterial for implant thin films, largely recognized for its excellent capability to chemically bond to hard tissue inducing the osteogenesis without immune response from human tissues. Nowadays, intense research efforts are focused on development of antimicrobial HA doped thin films. In particular, HA doped with Ag (Ag:HA) is expected to inhibit the attachment of microbes and contamination of metallic implant surface. We herewith report on nano-sized HA and Ag:HA thin films synthesized by pulsed laser deposition on pure Ti and Ti modified with 100 nm diameter TiO2 nanotubes (fabricated by anodization of Ti plates) substrates. The HA-based thin films were characterized by SEM, AFM, EDS, FUR, and XRD. The cytotoxic activity was tested with HEp2 cells against controls. The antifungal efficiency of the deposited layers was tested against the Candida albicans and Aspergillus niger strains. The Ti substrates modified with TiO2 nanotubes covered with Ag:HA thin films showed the highest antifungal activity.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Antifungal activity of Ag:hydroxyapatite thin films synthesized by pulsed laser deposition on Ti and Ti modified by TiO2 nanotubes substrates",
pages = "45-37",
volume = "293",
doi = "10.1016/j.apsusc.2013.12.029"
}

Eraković, S., Janković, A., Ristoscu, C., Duta, L., Serban, N., Visan, A., Mihailescu, I. N., Stan, G. E., Socol, M., Iordache, O., Dumitrescu, I., Luculescu, C. R., Janaćković, Đ.,& Mišković-Stanković, V.. (2014). Antifungal activity of Ag:hydroxyapatite thin films synthesized by pulsed laser deposition on Ti and Ti modified by TiO2 nanotubes substrates. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 293, 37-45.
https://doi.org/10.1016/j.apsusc.2013.12.029

Eraković S, Janković A, Ristoscu C, Duta L, Serban N, Visan A, Mihailescu IN, Stan GE, Socol M, Iordache O, Dumitrescu I, Luculescu CR, Janaćković Đ, Mišković-Stanković V. Antifungal activity of Ag:hydroxyapatite thin films synthesized by pulsed laser deposition on Ti and Ti modified by TiO2 nanotubes substrates. in Applied Surface Science. 2014;293:37-45.
doi:10.1016/j.apsusc.2013.12.029 .

Eraković, Sanja, Janković, Ana, Ristoscu, Carmen, Duta, L., Serban, N., Visan, A., Mihailescu, Ion N., Stan, George E., Socol, M., Iordache, O., Dumitrescu, I., Luculescu, C. R., Janaćković, Đorđe, Mišković-Stanković, Vesna, "Antifungal activity of Ag:hydroxyapatite thin films synthesized by pulsed laser deposition on Ti and Ti modified by TiO2 nanotubes substrates" in Applied Surface Science, 293 (2014):37-45,
https://doi.org/10.1016/j.apsusc.2013.12.029 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko
AU  - Petrović, Rada
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Florea, Ileana
AU  - Ersen, Ovidiu
AU  - Janaćković, Đorđe
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2831
AB  - Titanium dioxide (TiO2) nanotubes arrays, obtained by anodization technique and annealing, were decorated with CdS using pulsed laser deposition method. Their structural, morphological and chemical characterization was carried out by electron microscopy in scanning (SEM) and transmission (TEM) modes, combined with energy dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS). It was demonstrated that the quantity of deposited CdS can be controlled by varying the number of laser pulses. The chemical mapping of the elements of interest was performed using the energy filtered mode of the electron microscope. The results showed that pulse laser deposition is an adequate technique for deposition of CdS inside and between 100 nm wide TiO2 nanotubes. The diffuse reflectance spectroscopy investigation of selected samples proved that the absorption edge of the prepared CdS/TiO2 nanocomposites is significantly extended to the visible range. The corresponding band gaps were determinated from the Tauc plot of transformed Kubelka-Munk function. The band gap reduction of TiO2 nanotubes by pulsed laser deposition of CdS was put in evidence.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Visible light-harvesting of TiO2 nanotubes array by pulsed laser deposited CdS
EP  - 230
SP  - 225
VL  - 309
DO  - 10.1016/j.apsusc.2014.05.015
ER  - 

@article{
author = "Bjelajac, Anđelika and Đokić, Veljko and Petrović, Rada and Socol, Gabriel and Mihailescu, Ion N. and Florea, Ileana and Ersen, Ovidiu and Janaćković, Đorđe",
year = "2014",
abstract = "Titanium dioxide (TiO2) nanotubes arrays, obtained by anodization technique and annealing, were decorated with CdS using pulsed laser deposition method. Their structural, morphological and chemical characterization was carried out by electron microscopy in scanning (SEM) and transmission (TEM) modes, combined with energy dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS). It was demonstrated that the quantity of deposited CdS can be controlled by varying the number of laser pulses. The chemical mapping of the elements of interest was performed using the energy filtered mode of the electron microscope. The results showed that pulse laser deposition is an adequate technique for deposition of CdS inside and between 100 nm wide TiO2 nanotubes. The diffuse reflectance spectroscopy investigation of selected samples proved that the absorption edge of the prepared CdS/TiO2 nanocomposites is significantly extended to the visible range. The corresponding band gaps were determinated from the Tauc plot of transformed Kubelka-Munk function. The band gap reduction of TiO2 nanotubes by pulsed laser deposition of CdS was put in evidence.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Visible light-harvesting of TiO2 nanotubes array by pulsed laser deposited CdS",
pages = "230-225",
volume = "309",
doi = "10.1016/j.apsusc.2014.05.015"
}

Bjelajac, A., Đokić, V., Petrović, R., Socol, G., Mihailescu, I. N., Florea, I., Ersen, O.,& Janaćković, Đ.. (2014). Visible light-harvesting of TiO2 nanotubes array by pulsed laser deposited CdS. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 309, 225-230.
https://doi.org/10.1016/j.apsusc.2014.05.015

Bjelajac A, Đokić V, Petrović R, Socol G, Mihailescu IN, Florea I, Ersen O, Janaćković Đ. Visible light-harvesting of TiO2 nanotubes array by pulsed laser deposited CdS. in Applied Surface Science. 2014;309:225-230.
doi:10.1016/j.apsusc.2014.05.015 .

Bjelajac, Anđelika, Đokić, Veljko, Petrović, Rada, Socol, Gabriel, Mihailescu, Ion N., Florea, Ileana, Ersen, Ovidiu, Janaćković, Đorđe, "Visible light-harvesting of TiO2 nanotubes array by pulsed laser deposited CdS" in Applied Surface Science, 309 (2014):225-230,
https://doi.org/10.1016/j.apsusc.2014.05.015 . .

TY  - JOUR
AU  - Linnik, Oksana
AU  - Petrik, Irina
AU  - Smirnova, Natalia
AU  - Kandyba, Viktor
AU  - Korduban, Oleksandr
AU  - Eremenko, Anna
AU  - Socol, Gabriel
AU  - Stefan, Nicolaie
AU  - Ristoscu, Carmen
AU  - Mihailescu, Ion N.
AU  - Sutan, Claudiu
AU  - Malinovschi, Viorel
AU  - Đokić, Veljko
AU  - Janaković, Đordje
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2007
AB  - Doped TiO2/ZrO2 films were obtained by Pulsed Laser Deposition method under different synthesis conditions. The onset of absorption spectra was red shifted for the films obtained in N-2 containing gas mixtures, while a broad absorption in visible was observed in the case of films deposited in CH4 atmosphere. The presence of O-Ti-N bonds revealed by XPS corresponded to the highest photocatalytic performance. XPS spectra of the samples obtained in N-2/CH4 gas mixtures evidenced a more effective incorporation of nitrogen in the structure due to oxygen deficiency. Nevertheless, no atomic carbon presence in the TiO2/ZrO2 structures has been detected.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Tio2/zro2 thin films synthesized by pld in low pressure n-, c- and/or o-containing gases: structural, optical and photocatalytic properties
EP  - 1352
IS  - 3
SP  - 1343
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2007
ER  - 

@article{
author = "Linnik, Oksana and Petrik, Irina and Smirnova, Natalia and Kandyba, Viktor and Korduban, Oleksandr and Eremenko, Anna and Socol, Gabriel and Stefan, Nicolaie and Ristoscu, Carmen and Mihailescu, Ion N. and Sutan, Claudiu and Malinovschi, Viorel and Đokić, Veljko and Janaković, Đordje",
year = "2012",
abstract = "Doped TiO2/ZrO2 films were obtained by Pulsed Laser Deposition method under different synthesis conditions. The onset of absorption spectra was red shifted for the films obtained in N-2 containing gas mixtures, while a broad absorption in visible was observed in the case of films deposited in CH4 atmosphere. The presence of O-Ti-N bonds revealed by XPS corresponded to the highest photocatalytic performance. XPS spectra of the samples obtained in N-2/CH4 gas mixtures evidenced a more effective incorporation of nitrogen in the structure due to oxygen deficiency. Nevertheless, no atomic carbon presence in the TiO2/ZrO2 structures has been detected.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Tio2/zro2 thin films synthesized by pld in low pressure n-, c- and/or o-containing gases: structural, optical and photocatalytic properties",
pages = "1352-1343",
number = "3",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2007"
}

Linnik, O., Petrik, I., Smirnova, N., Kandyba, V., Korduban, O., Eremenko, A., Socol, G., Stefan, N., Ristoscu, C., Mihailescu, I. N., Sutan, C., Malinovschi, V., Đokić, V.,& Janaković, Đ.. (2012). Tio2/zro2 thin films synthesized by pld in low pressure n-, c- and/or o-containing gases: structural, optical and photocatalytic properties. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 7(3), 1343-1352.
https://hdl.handle.net/21.15107/rcub_technorep_2007

Linnik O, Petrik I, Smirnova N, Kandyba V, Korduban O, Eremenko A, Socol G, Stefan N, Ristoscu C, Mihailescu IN, Sutan C, Malinovschi V, Đokić V, Janaković Đ. Tio2/zro2 thin films synthesized by pld in low pressure n-, c- and/or o-containing gases: structural, optical and photocatalytic properties. in Digest Journal of Nanomaterials and Biostructures. 2012;7(3):1343-1352.
https://hdl.handle.net/21.15107/rcub_technorep_2007 .

Linnik, Oksana, Petrik, Irina, Smirnova, Natalia, Kandyba, Viktor, Korduban, Oleksandr, Eremenko, Anna, Socol, Gabriel, Stefan, Nicolaie, Ristoscu, Carmen, Mihailescu, Ion N., Sutan, Claudiu, Malinovschi, Viorel, Đokić, Veljko, Janaković, Đordje, "Tio2/zro2 thin films synthesized by pld in low pressure n-, c- and/or o-containing gases: structural, optical and photocatalytic properties" in Digest Journal of Nanomaterials and Biostructures, 7, no. 3 (2012):1343-1352,
https://hdl.handle.net/21.15107/rcub_technorep_2007 .

TY  - JOUR
AU  - Socol, Gabriel
AU  - Gnatyuk, Yu.
AU  - Stefan, Nicolaie
AU  - Smirnova, Natalia
AU  - Đokić, Veljko
AU  - Sutan, Claudiu
AU  - Malinovschi, Viorel
AU  - Stanculescu, A.
AU  - Korduban, Oleksandr
AU  - Mihailescu, Ion N.
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1585
AB  - We report on pulsed laser deposition of TiO2 films on glass substrates in oxygen, methane, nitrogen and mixture of oxygen and nitrogen atmosphere. The nitrogen incorporation into TiO2 lattice was successfully achieved, as demonstrated by optical absorption and XPS measurements. The absorption edge of the N-doped TiO2 films was red-shifted up to similar to 480 nm from 360 nm in case of undoped ones. The photocatalytic activity of TiO2 films was investigated during toxic Cr(VI) ions photoreduction to Cr(III) state in aqueous media under irradiation with visible and UV light. Under visible light irradiation, TiO2 films deposited in nitrogen atmosphere showed the highest photocatalytic activity, whereas by UV light exposure the best results were obtained for the TiO2 structures deposited in pure methane and oxygen atmosphere.
PB  - Elsevier Science Sa, Lausanne
T2  - Thin Solid Films
T1  - Photocatalytic activity of pulsed laser deposited TiO2 thin films in N-2, O-2 and CH4
EP  - 4653
IS  - 16
SP  - 4648
VL  - 518
DO  - 10.1016/j.tsf.2009.12.051
ER  - 

@article{
author = "Socol, Gabriel and Gnatyuk, Yu. and Stefan, Nicolaie and Smirnova, Natalia and Đokić, Veljko and Sutan, Claudiu and Malinovschi, Viorel and Stanculescu, A. and Korduban, Oleksandr and Mihailescu, Ion N.",
year = "2010",
abstract = "We report on pulsed laser deposition of TiO2 films on glass substrates in oxygen, methane, nitrogen and mixture of oxygen and nitrogen atmosphere. The nitrogen incorporation into TiO2 lattice was successfully achieved, as demonstrated by optical absorption and XPS measurements. The absorption edge of the N-doped TiO2 films was red-shifted up to similar to 480 nm from 360 nm in case of undoped ones. The photocatalytic activity of TiO2 films was investigated during toxic Cr(VI) ions photoreduction to Cr(III) state in aqueous media under irradiation with visible and UV light. Under visible light irradiation, TiO2 films deposited in nitrogen atmosphere showed the highest photocatalytic activity, whereas by UV light exposure the best results were obtained for the TiO2 structures deposited in pure methane and oxygen atmosphere.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Thin Solid Films",
title = "Photocatalytic activity of pulsed laser deposited TiO2 thin films in N-2, O-2 and CH4",
pages = "4653-4648",
number = "16",
volume = "518",
doi = "10.1016/j.tsf.2009.12.051"
}

Socol, G., Gnatyuk, Yu., Stefan, N., Smirnova, N., Đokić, V., Sutan, C., Malinovschi, V., Stanculescu, A., Korduban, O.,& Mihailescu, I. N.. (2010). Photocatalytic activity of pulsed laser deposited TiO2 thin films in N-2, O-2 and CH4. in Thin Solid Films
Elsevier Science Sa, Lausanne., 518(16), 4648-4653.
https://doi.org/10.1016/j.tsf.2009.12.051

Socol G, Gnatyuk Y, Stefan N, Smirnova N, Đokić V, Sutan C, Malinovschi V, Stanculescu A, Korduban O, Mihailescu IN. Photocatalytic activity of pulsed laser deposited TiO2 thin films in N-2, O-2 and CH4. in Thin Solid Films. 2010;518(16):4648-4653.
doi:10.1016/j.tsf.2009.12.051 .

Socol, Gabriel, Gnatyuk, Yu., Stefan, Nicolaie, Smirnova, Natalia, Đokić, Veljko, Sutan, Claudiu, Malinovschi, Viorel, Stanculescu, A., Korduban, Oleksandr, Mihailescu, Ion N., "Photocatalytic activity of pulsed laser deposited TiO2 thin films in N-2, O-2 and CH4" in Thin Solid Films, 518, no. 16 (2010):4648-4653,
https://doi.org/10.1016/j.tsf.2009.12.051 . .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Jokić, Bojan
AU  - Petrović, Rada
AU  - Palcevskis, Eriks
AU  - Dindune, Antonija
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1504
AB  - A nanosized HAP powder was sintered and hot pressed, in order to obtain dense HAP ceramics. In a first series of experiments, the powder was isostatically pressed into uniform green compacts and sintered at temperatures ranging from 1000 degrees C to 1200 degrees C in air atmosphere for different times. In a second series, the isostatically pressed green compacts were hot pressed in argon atmosphere at 900 degrees C, 950 degrees C and 1000 degrees C. The SEM micrograph of the sample sintered at 1200 degrees C for 2 h showed a uniform 3 mu m mean grain size dense microstructure. In the case of hot pressed HAP compacts, full dense, translucent nanostructures were obtained having mean grain size below 100 nm and improved mechanical properties. With the grain size decreasing from 3 mu m to 50 nm, the fracture toughness of pure HAP ceramics increased from 0.28 MPa m(1/2) to 1.52 MPa m(1/2).
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Processing of dense nanostructured HAP ceramics by sintering and hot pressing
EP  - 1413
IS  - 4
SP  - 1407
VL  - 35
DO  - 10.1016/j.ceramint.2008.07.007
ER  - 

@article{
author = "Veljović, Đorđe and Jokić, Bojan and Petrović, Rada and Palcevskis, Eriks and Dindune, Antonija and Mihailescu, Ion N. and Janaćković, Đorđe",
year = "2009",
abstract = "A nanosized HAP powder was sintered and hot pressed, in order to obtain dense HAP ceramics. In a first series of experiments, the powder was isostatically pressed into uniform green compacts and sintered at temperatures ranging from 1000 degrees C to 1200 degrees C in air atmosphere for different times. In a second series, the isostatically pressed green compacts were hot pressed in argon atmosphere at 900 degrees C, 950 degrees C and 1000 degrees C. The SEM micrograph of the sample sintered at 1200 degrees C for 2 h showed a uniform 3 mu m mean grain size dense microstructure. In the case of hot pressed HAP compacts, full dense, translucent nanostructures were obtained having mean grain size below 100 nm and improved mechanical properties. With the grain size decreasing from 3 mu m to 50 nm, the fracture toughness of pure HAP ceramics increased from 0.28 MPa m(1/2) to 1.52 MPa m(1/2).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Processing of dense nanostructured HAP ceramics by sintering and hot pressing",
pages = "1413-1407",
number = "4",
volume = "35",
doi = "10.1016/j.ceramint.2008.07.007"
}

Veljović, Đ., Jokić, B., Petrović, R., Palcevskis, E., Dindune, A., Mihailescu, I. N.,& Janaćković, Đ.. (2009). Processing of dense nanostructured HAP ceramics by sintering and hot pressing. in Ceramics International
Elsevier Sci Ltd, Oxford., 35(4), 1407-1413.
https://doi.org/10.1016/j.ceramint.2008.07.007

Veljović Đ, Jokić B, Petrović R, Palcevskis E, Dindune A, Mihailescu IN, Janaćković Đ. Processing of dense nanostructured HAP ceramics by sintering and hot pressing. in Ceramics International. 2009;35(4):1407-1413.
doi:10.1016/j.ceramint.2008.07.007 .

Veljović, Đorđe, Jokić, Bojan, Petrović, Rada, Palcevskis, Eriks, Dindune, Antonija, Mihailescu, Ion N., Janaćković, Đorđe, "Processing of dense nanostructured HAP ceramics by sintering and hot pressing" in Ceramics International, 35, no. 4 (2009):1407-1413,
https://doi.org/10.1016/j.ceramint.2008.07.007 . .

TY  - JOUR
AU  - Popescu, A. C.
AU  - Sima, F.
AU  - Duta, L.
AU  - Popescu, A. C.
AU  - Mihailescu, Ion N.
AU  - Capitanu, D.
AU  - Mustata, R.
AU  - Sima, L. E.
AU  - Petrescu, S. M.
AU  - Janaćković, Đorđe
PY  - 2009
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1483
AB  - We report on the synthesis by pulsed laser deposition with a KrF* excimer laser source (lambda = 248 nm, tau = 25 ns) of bioglass thin films of 6P57 and 6P61 types. Physiology, viability, and proliferation of human osteoblast cells were determined by quantitative in vitro tests performed by flow cytometry on primary osteoblasts cultured on pulsed laser deposited bioglasses. Both types of glass films proved to be appropriate mediums for cell survival and proliferation. In a parallel investigation, cell morphology and adhesion to the surface was studied by fluorescence microscopy and scanning electron microscopy. Strong bonds between the materials and cells were found in both cases, as osteoblast pseudopodes penetrated deep into the material. According to our observations, the 6P57 glass films were superior with respect to viability and proliferation performances.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests
EP  - 5490
IS  - 10
SP  - 5486
VL  - 255
DO  - 10.1016/j.apsusc.2008.10.031
ER  - 

@article{
author = "Popescu, A. C. and Sima, F. and Duta, L. and Popescu, A. C. and Mihailescu, Ion N. and Capitanu, D. and Mustata, R. and Sima, L. E. and Petrescu, S. M. and Janaćković, Đorđe",
year = "2009",
abstract = "We report on the synthesis by pulsed laser deposition with a KrF* excimer laser source (lambda = 248 nm, tau = 25 ns) of bioglass thin films of 6P57 and 6P61 types. Physiology, viability, and proliferation of human osteoblast cells were determined by quantitative in vitro tests performed by flow cytometry on primary osteoblasts cultured on pulsed laser deposited bioglasses. Both types of glass films proved to be appropriate mediums for cell survival and proliferation. In a parallel investigation, cell morphology and adhesion to the surface was studied by fluorescence microscopy and scanning electron microscopy. Strong bonds between the materials and cells were found in both cases, as osteoblast pseudopodes penetrated deep into the material. According to our observations, the 6P57 glass films were superior with respect to viability and proliferation performances.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests",
pages = "5490-5486",
number = "10",
volume = "255",
doi = "10.1016/j.apsusc.2008.10.031"
}

Popescu, A. C., Sima, F., Duta, L., Popescu, A. C., Mihailescu, I. N., Capitanu, D., Mustata, R., Sima, L. E., Petrescu, S. M.,& Janaćković, Đ.. (2009). Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests. in Applied Surface Science
Elsevier, Amsterdam., 255(10), 5486-5490.
https://doi.org/10.1016/j.apsusc.2008.10.031

Popescu AC, Sima F, Duta L, Popescu AC, Mihailescu IN, Capitanu D, Mustata R, Sima LE, Petrescu SM, Janaćković Đ. Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests. in Applied Surface Science. 2009;255(10):5486-5490.
doi:10.1016/j.apsusc.2008.10.031 .

Popescu, A. C., Sima, F., Duta, L., Popescu, A. C., Mihailescu, Ion N., Capitanu, D., Mustata, R., Sima, L. E., Petrescu, S. M., Janaćković, Đorđe, "Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests" in Applied Surface Science, 255, no. 10 (2009):5486-5490,
https://doi.org/10.1016/j.apsusc.2008.10.031 . .

TY  - JOUR
AU  - Floroian, L.
AU  - Savu, B.
AU  - Stanciu, G.
AU  - Popescu, A. C.
AU  - Sima, F.
AU  - Mihailescu, Ion N.
AU  - Mustata, R.
AU  - Sima, L. E.
AU  - Petrescu, M.
AU  - Tanasković, Dušanka
AU  - Janaćković, Đorđe
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1230
AB  - We report the synthesis by pulsed laser deposition of thin structures of two bioactive glasses belonging to the SiO2-Na2O-K2O-CaO-MgO-P2O5 system, on medical grade Ti substrates. We evaluated their biocompatibility after immersion in simulated body fluids and by performing cells adhesion tests. The Films were characterized by confocal scanning laser microscopy and Fourier transform infrared spectrometry, before and after 30 and 46 days immersion in fluids. Our studies demonstrated that deposited coatings were degraded in simulated fluids. A new apatite layer was synthesized by ions changing with the fluid during the decomposition of bioglasses. We investigated after immersion in fluids cells adhesion and the cytoskelet organization of synthesized structures, by fluorescence microscopy. A good adhesion to bioglass coatings was evidenced.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests
EP  - 3062
IS  - 5
SP  - 3056
VL  - 255
DO  - 10.1016/j.apsusc.2008.08.105
ER  - 

@article{
author = "Floroian, L. and Savu, B. and Stanciu, G. and Popescu, A. C. and Sima, F. and Mihailescu, Ion N. and Mustata, R. and Sima, L. E. and Petrescu, M. and Tanasković, Dušanka and Janaćković, Đorđe",
year = "2008",
abstract = "We report the synthesis by pulsed laser deposition of thin structures of two bioactive glasses belonging to the SiO2-Na2O-K2O-CaO-MgO-P2O5 system, on medical grade Ti substrates. We evaluated their biocompatibility after immersion in simulated body fluids and by performing cells adhesion tests. The Films were characterized by confocal scanning laser microscopy and Fourier transform infrared spectrometry, before and after 30 and 46 days immersion in fluids. Our studies demonstrated that deposited coatings were degraded in simulated fluids. A new apatite layer was synthesized by ions changing with the fluid during the decomposition of bioglasses. We investigated after immersion in fluids cells adhesion and the cytoskelet organization of synthesized structures, by fluorescence microscopy. A good adhesion to bioglass coatings was evidenced.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests",
pages = "3062-3056",
number = "5",
volume = "255",
doi = "10.1016/j.apsusc.2008.08.105"
}

Floroian, L., Savu, B., Stanciu, G., Popescu, A. C., Sima, F., Mihailescu, I. N., Mustata, R., Sima, L. E., Petrescu, M., Tanasković, D.,& Janaćković, Đ.. (2008). Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests. in Applied Surface Science
Elsevier, Amsterdam., 255(5), 3056-3062.
https://doi.org/10.1016/j.apsusc.2008.08.105

Floroian L, Savu B, Stanciu G, Popescu AC, Sima F, Mihailescu IN, Mustata R, Sima LE, Petrescu M, Tanasković D, Janaćković Đ. Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests. in Applied Surface Science. 2008;255(5):3056-3062.
doi:10.1016/j.apsusc.2008.08.105 .

Floroian, L., Savu, B., Stanciu, G., Popescu, A. C., Sima, F., Mihailescu, Ion N., Mustata, R., Sima, L. E., Petrescu, M., Tanasković, Dušanka, Janaćković, Đorđe, "Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests" in Applied Surface Science, 255, no. 5 (2008):3056-3062,
https://doi.org/10.1016/j.apsusc.2008.08.105 . .

TY  - JOUR
AU  - Tanasković, Dušanka
AU  - Veljović, Đorđe
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
AU  - Mitrić, Miodrag
AU  - Cojanu, C.
AU  - Ristoscu, Carmen
AU  - Mihailescu, Ion N.
PY  - 2008
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1220
AB  - Pulsed laser deposition was used to obtain functionally graded bioactive glass coatings on titanium substrates. An UV KrF* (lambda=248 nm, tau gt 7 ns) excimer laser was used for the multi-pulse irradiation of the targets. The depositions were performed in oxygen while keeping substrate temperature at 400 degrees C. We used sintered glass targets in the system SiO2-Na2O-K2O-CaO-MgO-P2O5 that differed in SiO2 content, which was either 57 wt.% (6P57) or 61 wt.% (6P61). A glass 6P61 was used as the first layer in direct contact with the metallic substrate, while the outer bioactive layer was made of glass 6P57. Both the bioactive coatings and the bulk glasses were analyzed by Fourier transform infrared spectrometry (FTIR), grazing incidence X-ray diffraction (GIXRD), and scanning electron microscopy (SEM). The FTIR spectra of the glass powders and glass coatings showed the main vibration modes of the Si-O-Si groups. GIXRD analysis confirmed that the glass coatings had an amorphous structure. The SEM micrographs of the glass coatings showed the films to consist of droplets with diameters ranging from 0.2 to 5 Pm. SEM was used to determine the rate of apatite formation on the coating when exposed to simulated body fluid (SBF) solution for 7 days. We demonstrated that pulsed laser deposition leads to good glass-metal adhesion on the substrate and well attached bioactive particles on the surface. We consider therefore this method appropriate for forming implants that can develop an apatite layer after immersion in SBF.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Key Engineering Materials
T1  - Double-layer bioactive glass coatings obtained by pulsed laser deposition
EP  - 280
SP  - 277
VL  - 361-363 I
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6718
ER  - 

@article{
author = "Tanasković, Dušanka and Veljović, Đorđe and Petrović, Rada and Janaćković, Đorđe and Mitrić, Miodrag and Cojanu, C. and Ristoscu, Carmen and Mihailescu, Ion N.",
year = "2008",
abstract = "Pulsed laser deposition was used to obtain functionally graded bioactive glass coatings on titanium substrates. An UV KrF* (lambda=248 nm, tau gt 7 ns) excimer laser was used for the multi-pulse irradiation of the targets. The depositions were performed in oxygen while keeping substrate temperature at 400 degrees C. We used sintered glass targets in the system SiO2-Na2O-K2O-CaO-MgO-P2O5 that differed in SiO2 content, which was either 57 wt.% (6P57) or 61 wt.% (6P61). A glass 6P61 was used as the first layer in direct contact with the metallic substrate, while the outer bioactive layer was made of glass 6P57. Both the bioactive coatings and the bulk glasses were analyzed by Fourier transform infrared spectrometry (FTIR), grazing incidence X-ray diffraction (GIXRD), and scanning electron microscopy (SEM). The FTIR spectra of the glass powders and glass coatings showed the main vibration modes of the Si-O-Si groups. GIXRD analysis confirmed that the glass coatings had an amorphous structure. The SEM micrographs of the glass coatings showed the films to consist of droplets with diameters ranging from 0.2 to 5 Pm. SEM was used to determine the rate of apatite formation on the coating when exposed to simulated body fluid (SBF) solution for 7 days. We demonstrated that pulsed laser deposition leads to good glass-metal adhesion on the substrate and well attached bioactive particles on the surface. We consider therefore this method appropriate for forming implants that can develop an apatite layer after immersion in SBF.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Key Engineering Materials",
title = "Double-layer bioactive glass coatings obtained by pulsed laser deposition",
pages = "280-277",
volume = "361-363 I",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6718"
}

Tanasković, D., Veljović, Đ., Petrović, R., Janaćković, Đ., Mitrić, M., Cojanu, C., Ristoscu, C.,& Mihailescu, I. N.. (2008). Double-layer bioactive glass coatings obtained by pulsed laser deposition. in Key Engineering Materials
Trans Tech Publications Ltd, Durnten-Zurich., 361-363 I, 277-280.
https://hdl.handle.net/21.15107/rcub_vinar_6718

Tanasković D, Veljović Đ, Petrović R, Janaćković Đ, Mitrić M, Cojanu C, Ristoscu C, Mihailescu IN. Double-layer bioactive glass coatings obtained by pulsed laser deposition. in Key Engineering Materials. 2008;361-363 I:277-280.
https://hdl.handle.net/21.15107/rcub_vinar_6718 .

Tanasković, Dušanka, Veljović, Đorđe, Petrović, Rada, Janaćković, Đorđe, Mitrić, Miodrag, Cojanu, C., Ristoscu, Carmen, Mihailescu, Ion N., "Double-layer bioactive glass coatings obtained by pulsed laser deposition" in Key Engineering Materials, 361-363 I (2008):277-280,
https://hdl.handle.net/21.15107/rcub_vinar_6718 .

TY  - JOUR
AU  - Gyorgy, E.
AU  - Grigorescu, S.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe
AU  - Dindune, Antonija
AU  - Kanepe, Z.
AU  - Palcevskis, Eriks
AU  - Zdrentu, E. L.
AU  - Petrescu, S. M.
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1170
AB  - Bioactive glass (BG), calcium hydroxyapatite (HA), and ZrO2 doped HA thin films were grown by pulsed laser deposition on Ti substrates. An UV KrF* (lambda = 248 nm, tau  gt = 7 ns) excimer laser was used for the multi-pulse irradiation of the targets. The substrates were kept at room temperature or heated during the film deposition at values within the (400-550 degrees C) range. The depositions were performed in oxygen and water vapor atmospheres, at pressure values in the range (5-40 Pa). The HA coatings were heat post-treated for 6 h in a flux of hot water vapors at the same temperature as applied during deposition. The surface morphology, chemical composition, and crystalline quality of the obtained thin films were studied by scanning electron microscopy, atomic force microscopy, and X-ray diffractometry. The films were seeded for in vitro tests with Hek293 (human embryonic kidney) cells that revealed a good adherence on the deposited layers. Biocompatibility tests showed that cell growth was better on HA than on BG thin films.
PB  - Elsevier, Amsterdam
T2  - Applied Surface Science
T1  - Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition
EP  - 7986
IS  - 19
SP  - 7981
VL  - 253
DO  - 10.1016/j.apsusc.2007.02.146
ER  - 

@article{
author = "Gyorgy, E. and Grigorescu, S. and Socol, Gabriel and Mihailescu, Ion N. and Janaćković, Đorđe and Dindune, Antonija and Kanepe, Z. and Palcevskis, Eriks and Zdrentu, E. L. and Petrescu, S. M.",
year = "2007",
abstract = "Bioactive glass (BG), calcium hydroxyapatite (HA), and ZrO2 doped HA thin films were grown by pulsed laser deposition on Ti substrates. An UV KrF* (lambda = 248 nm, tau  gt = 7 ns) excimer laser was used for the multi-pulse irradiation of the targets. The substrates were kept at room temperature or heated during the film deposition at values within the (400-550 degrees C) range. The depositions were performed in oxygen and water vapor atmospheres, at pressure values in the range (5-40 Pa). The HA coatings were heat post-treated for 6 h in a flux of hot water vapors at the same temperature as applied during deposition. The surface morphology, chemical composition, and crystalline quality of the obtained thin films were studied by scanning electron microscopy, atomic force microscopy, and X-ray diffractometry. The films were seeded for in vitro tests with Hek293 (human embryonic kidney) cells that revealed a good adherence on the deposited layers. Biocompatibility tests showed that cell growth was better on HA than on BG thin films.",
publisher = "Elsevier, Amsterdam",
journal = "Applied Surface Science",
title = "Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition",
pages = "7986-7981",
number = "19",
volume = "253",
doi = "10.1016/j.apsusc.2007.02.146"
}

Gyorgy, E., Grigorescu, S., Socol, G., Mihailescu, I. N., Janaćković, Đ., Dindune, A., Kanepe, Z., Palcevskis, E., Zdrentu, E. L.,& Petrescu, S. M.. (2007). Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition. in Applied Surface Science
Elsevier, Amsterdam., 253(19), 7981-7986.
https://doi.org/10.1016/j.apsusc.2007.02.146

Gyorgy E, Grigorescu S, Socol G, Mihailescu IN, Janaćković Đ, Dindune A, Kanepe Z, Palcevskis E, Zdrentu EL, Petrescu SM. Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition. in Applied Surface Science. 2007;253(19):7981-7986.
doi:10.1016/j.apsusc.2007.02.146 .

Gyorgy, E., Grigorescu, S., Socol, Gabriel, Mihailescu, Ion N., Janaćković, Đorđe, Dindune, Antonija, Kanepe, Z., Palcevskis, Eriks, Zdrentu, E. L., Petrescu, S. M., "Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition" in Applied Surface Science, 253, no. 19 (2007):7981-7986,
https://doi.org/10.1016/j.apsusc.2007.02.146 . .

TY  - JOUR
AU  - Tanasković, Dušanka
AU  - Jokić, Bojan
AU  - Socol, Gabriel
AU  - Popescu, A. C.
AU  - Mihailescu, Ion N.
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1149
AB  - Functionally graded glass-apatite multistructures were synthesized by pulsed laser deposition on Ti substrates. We used sintered targets of hydroxyapatite Ca-10(PO4)(6)(OH)(2), or bioglasses in the system SiO2-Na2O-K2O-CaO-MgO-P2O5 with SiO2 content of either 57 wt.% (6P57) or 61 wt.% (061). A UV KrF* (lambda = 248 nm, tau  gt  7 ns) excimer laser source was used for the multipulse laser ablation of the targets. The hydroxyapatite thin films were obtained in H2O Vapors, while the bioglass layers were deposited in O-2. Thin films of 6P61 were deposited in direct contact with Ti, because Ti and this glass have similar thermal expansion behaviors, which ensure good bioglass adhesion to the substrate. This glass, however, is not bioactive, so yet more depositions of 6P57 bioglass and/or hydroxyapatite thin films were performed. All structures with hydroxyapatite overcoating were post-treated in a flux of water vapors. The obtained multistructures were characterized by various techniques. Xray investigations of the coatings found small amounts of crystalline hydroxyapatite in the outer layers. The scanning electron microscopy analyses revealed homogeneous coatings with good adhesion to the Ti substrate. Our studies showed that the multistructures we had obtained were compatible with further use in biomimetic metallic implants with glass-apatite coating applications.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition
EP  - 1282
IS  - 4
SP  - 1279
VL  - 254
DO  - 10.1016/j.apsusc.2007.08.009
ER  - 

@article{
author = "Tanasković, Dušanka and Jokić, Bojan and Socol, Gabriel and Popescu, A. C. and Mihailescu, Ion N. and Petrović, Rada and Janaćković, Đorđe",
year = "2007",
abstract = "Functionally graded glass-apatite multistructures were synthesized by pulsed laser deposition on Ti substrates. We used sintered targets of hydroxyapatite Ca-10(PO4)(6)(OH)(2), or bioglasses in the system SiO2-Na2O-K2O-CaO-MgO-P2O5 with SiO2 content of either 57 wt.% (6P57) or 61 wt.% (061). A UV KrF* (lambda = 248 nm, tau  gt  7 ns) excimer laser source was used for the multipulse laser ablation of the targets. The hydroxyapatite thin films were obtained in H2O Vapors, while the bioglass layers were deposited in O-2. Thin films of 6P61 were deposited in direct contact with Ti, because Ti and this glass have similar thermal expansion behaviors, which ensure good bioglass adhesion to the substrate. This glass, however, is not bioactive, so yet more depositions of 6P57 bioglass and/or hydroxyapatite thin films were performed. All structures with hydroxyapatite overcoating were post-treated in a flux of water vapors. The obtained multistructures were characterized by various techniques. Xray investigations of the coatings found small amounts of crystalline hydroxyapatite in the outer layers. The scanning electron microscopy analyses revealed homogeneous coatings with good adhesion to the Ti substrate. Our studies showed that the multistructures we had obtained were compatible with further use in biomimetic metallic implants with glass-apatite coating applications.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition",
pages = "1282-1279",
number = "4",
volume = "254",
doi = "10.1016/j.apsusc.2007.08.009"
}

Tanasković, D., Jokić, B., Socol, G., Popescu, A. C., Mihailescu, I. N., Petrović, R.,& Janaćković, Đ.. (2007). Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 254(4), 1279-1282.
https://doi.org/10.1016/j.apsusc.2007.08.009

Tanasković D, Jokić B, Socol G, Popescu AC, Mihailescu IN, Petrović R, Janaćković Đ. Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition. in Applied Surface Science. 2007;254(4):1279-1282.
doi:10.1016/j.apsusc.2007.08.009 .

Tanasković, Dušanka, Jokić, Bojan, Socol, Gabriel, Popescu, A. C., Mihailescu, Ion N., Petrović, Rada, Janaćković, Đorđe, "Synthesis of functionally graded bioactive glass-apatite multistructures on Ti substrates by pulsed laser deposition" in Applied Surface Science, 254, no. 4 (2007):1279-1282,
https://doi.org/10.1016/j.apsusc.2007.08.009 . .

TY  - JOUR
AU  - Floroian, L.
AU  - Savu, B.
AU  - Sima, F.
AU  - Mihailescu, Ion N.
AU  - Tanasković, Dušanka
AU  - Janaćković, Đorđe
PY  - 2007
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1177
AB  - We report the successful pulsed laser deposition on medical grade Ti substrates of thin films made of two bioactive glasses in the SiO2 - Na2O- K2O - CaO - MgO - P2O5 system. The films were topographically and chemically characterized by confocal scanning laser microscopy and Fourier transform infrared spectrophotometry. Our studies proved that chemical composition was similar in the base material and deposited films. The latter were rather uniform and rough enough to favor enhanced biocompatibility.
PB  - Inst Materials Physics, Bucharest
T2  - Digest Journal of Nanomaterials and Biostructures
T1  - Synthesis and characterization of bioglass thin films
EP  - 291
IS  - 3
SP  - 285
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_1177
ER  - 

@article{
author = "Floroian, L. and Savu, B. and Sima, F. and Mihailescu, Ion N. and Tanasković, Dušanka and Janaćković, Đorđe",
year = "2007",
abstract = "We report the successful pulsed laser deposition on medical grade Ti substrates of thin films made of two bioactive glasses in the SiO2 - Na2O- K2O - CaO - MgO - P2O5 system. The films were topographically and chemically characterized by confocal scanning laser microscopy and Fourier transform infrared spectrophotometry. Our studies proved that chemical composition was similar in the base material and deposited films. The latter were rather uniform and rough enough to favor enhanced biocompatibility.",
publisher = "Inst Materials Physics, Bucharest",
journal = "Digest Journal of Nanomaterials and Biostructures",
title = "Synthesis and characterization of bioglass thin films",
pages = "291-285",
number = "3",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_1177"
}

Floroian, L., Savu, B., Sima, F., Mihailescu, I. N., Tanasković, D.,& Janaćković, Đ.. (2007). Synthesis and characterization of bioglass thin films. in Digest Journal of Nanomaterials and Biostructures
Inst Materials Physics, Bucharest., 2(3), 285-291.
https://hdl.handle.net/21.15107/rcub_technorep_1177

Floroian L, Savu B, Sima F, Mihailescu IN, Tanasković D, Janaćković Đ. Synthesis and characterization of bioglass thin films. in Digest Journal of Nanomaterials and Biostructures. 2007;2(3):285-291.
https://hdl.handle.net/21.15107/rcub_technorep_1177 .

Floroian, L., Savu, B., Sima, F., Mihailescu, Ion N., Tanasković, Dušanka, Janaćković, Đorđe, "Synthesis and characterization of bioglass thin films" in Digest Journal of Nanomaterials and Biostructures, 2, no. 3 (2007):285-291,
https://hdl.handle.net/21.15107/rcub_technorep_1177 .