EUREKA E!3033 Bionanocomposite

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EUREKA E!3033 Bionanocomposite

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Publications

The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics

Veljović, Đorđe; Jančić-Heinemann, Radmila; Balać, Igor; Jokić, Bojan; Putić, Slaviša; Petrović, Rada; Janaćković, Đorđe

(Elsevier Sci Ltd, Oxford, 2011)

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Jančić-Heinemann, Radmila
AU  - Balać, Igor
AU  - Jokić, Bojan
AU  - Putić, Slaviša
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2011
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1906
AB  - In this study, the influence of the shape and size of the pores on the mechanical properties of the obtained porous HAP-based bioceramics was investigated. The porous HAP-based bioceramics were obtained starting from spherical calcium hydroxyapatite powder, obtained by hydrothermal syntheses. The number of shapeless inter-agglomerate pores decreased and amount of spherical intra-agglomerate pores increased on increasing the sintering temperature from 1100 degrees C to 1250 degrees C. The shape of pores also changed with thermal treatment of specimens; the small pores remained spherical while the larger pores became more spherical in shape, as was proved by image analysis. A three-dimensional, finite element unit cell model was applied to evaluate the influence of pore shape on the mechanical strength of HAP ceramics. By analyzing the effect of. the shape of pores to the fracture toughness of sintered porous HAP bioceramics, it was observed that the more spherical the pores were, the tougher became the bioceramics. After sintering at 1250 degrees C for 2 h, measured toughness was 1.31 MPa m(1/2), which is a relatively high value for this type of bioceramics.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics
EP  - 479
IS  - 2
SP  - 471
VL  - 37
DO  - 10.1016/j.ceramint.2010.09.014
ER  - 
@article{
author = "Veljović, Đorđe and Jančić-Heinemann, Radmila and Balać, Igor and Jokić, Bojan and Putić, Slaviša and Petrović, Rada and Janaćković, Đorđe",
year = "2011",
abstract = "In this study, the influence of the shape and size of the pores on the mechanical properties of the obtained porous HAP-based bioceramics was investigated. The porous HAP-based bioceramics were obtained starting from spherical calcium hydroxyapatite powder, obtained by hydrothermal syntheses. The number of shapeless inter-agglomerate pores decreased and amount of spherical intra-agglomerate pores increased on increasing the sintering temperature from 1100 degrees C to 1250 degrees C. The shape of pores also changed with thermal treatment of specimens; the small pores remained spherical while the larger pores became more spherical in shape, as was proved by image analysis. A three-dimensional, finite element unit cell model was applied to evaluate the influence of pore shape on the mechanical strength of HAP ceramics. By analyzing the effect of. the shape of pores to the fracture toughness of sintered porous HAP bioceramics, it was observed that the more spherical the pores were, the tougher became the bioceramics. After sintering at 1250 degrees C for 2 h, measured toughness was 1.31 MPa m(1/2), which is a relatively high value for this type of bioceramics.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics",
pages = "479-471",
number = "2",
volume = "37",
doi = "10.1016/j.ceramint.2010.09.014"
}
Veljović, Đ., Jančić-Heinemann, R., Balać, I., Jokić, B., Putić, S., Petrović, R.,& Janaćković, Đ.. (2011). The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 37(2), 471-479.
https://doi.org/10.1016/j.ceramint.2010.09.014
Veljović Đ, Jančić-Heinemann R, Balać I, Jokić B, Putić S, Petrović R, Janaćković Đ. The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics. in Ceramics International. 2011;37(2):471-479.
doi:10.1016/j.ceramint.2010.09.014 .
Veljović, Đorđe, Jančić-Heinemann, Radmila, Balać, Igor, Jokić, Bojan, Putić, Slaviša, Petrović, Rada, Janaćković, Đorđe, "The effect of the shape and size of the pores on the mechanical properties of porous HAP-based bioceramics" in Ceramics International, 37, no. 2 (2011):471-479,
https://doi.org/10.1016/j.ceramint.2010.09.014 . .
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Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing

Veljović, Đorđe; Palcevskis, Eriks; Dindune, Antonija; Putić, Slaviša; Balać, Igor; Petrović, Rada; Janaćković, Đorđe

(Springer, New York, 2010)

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Palcevskis, Eriks
AU  - Dindune, Antonija
AU  - Putić, Slaviša
AU  - Balać, Igor
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1703
AB  - Starting from two microspherical agglomerated HAP powders, porous biphasic HAP/TCP bioceramics were obtained by microwave sintering. During the sintering the HAP powders turned into biphasic mixtures, whereby HAP was the dominant crystalline phase in the case of the sample with the higher Ca/P ratio (HAP1) while alpha-TCP was the dominant crystalline phase in the sample with lower Ca/P ratio (HAP2). The porous microstructures of the obtained bioceramics were characterized by spherical intra-agglomerate pores and shapeless inter-agglomerate pores. The fracture toughness of the HAP1 and HAP2 samples microwave sintered at 1200 A degrees C for 15 min were 1.25 MPa m(1/2). The phase composition of the obtained bioceramics only had a minor effect on the indentation fracture toughness compared to a unique microstructure consisting of spherical intra-agglomerate pores with strong bonds between the spherical agglomerates. Cold isostatic pressing at 400 MPa before microwave sintering led to an increase in the fracture toughness of the biphasic HAP/TCP bioceramics to 1.35 MPa m(1/2).
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing
EP  - 3183
IS  - 12
SP  - 3175
VL  - 45
DO  - 10.1007/s10853-010-4324-8
ER  - 
@article{
author = "Veljović, Đorđe and Palcevskis, Eriks and Dindune, Antonija and Putić, Slaviša and Balać, Igor and Petrović, Rada and Janaćković, Đorđe",
year = "2010",
abstract = "Starting from two microspherical agglomerated HAP powders, porous biphasic HAP/TCP bioceramics were obtained by microwave sintering. During the sintering the HAP powders turned into biphasic mixtures, whereby HAP was the dominant crystalline phase in the case of the sample with the higher Ca/P ratio (HAP1) while alpha-TCP was the dominant crystalline phase in the sample with lower Ca/P ratio (HAP2). The porous microstructures of the obtained bioceramics were characterized by spherical intra-agglomerate pores and shapeless inter-agglomerate pores. The fracture toughness of the HAP1 and HAP2 samples microwave sintered at 1200 A degrees C for 15 min were 1.25 MPa m(1/2). The phase composition of the obtained bioceramics only had a minor effect on the indentation fracture toughness compared to a unique microstructure consisting of spherical intra-agglomerate pores with strong bonds between the spherical agglomerates. Cold isostatic pressing at 400 MPa before microwave sintering led to an increase in the fracture toughness of the biphasic HAP/TCP bioceramics to 1.35 MPa m(1/2).",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing",
pages = "3183-3175",
number = "12",
volume = "45",
doi = "10.1007/s10853-010-4324-8"
}
Veljović, Đ., Palcevskis, E., Dindune, A., Putić, S., Balać, I., Petrović, R.,& Janaćković, Đ.. (2010). Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing. in Journal of Materials Science
Springer, New York., 45(12), 3175-3183.
https://doi.org/10.1007/s10853-010-4324-8
Veljović Đ, Palcevskis E, Dindune A, Putić S, Balać I, Petrović R, Janaćković Đ. Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing. in Journal of Materials Science. 2010;45(12):3175-3183.
doi:10.1007/s10853-010-4324-8 .
Veljović, Đorđe, Palcevskis, Eriks, Dindune, Antonija, Putić, Slaviša, Balać, Igor, Petrović, Rada, Janaćković, Đorđe, "Microwave sintering improves the mechanical properties of biphasic calcium phosphates from hydroxyapatite microspheres produced from hydrothermal processing" in Journal of Materials Science, 45, no. 12 (2010):3175-3183,
https://doi.org/10.1007/s10853-010-4324-8 . .
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Microwave sintering of fine grained HAP and HAP/TCP bioceramics

Veljović, Đorđe; Zalite, Ilmars; Palcevskis, Eriks; Smičiklas, Ivana D.; Petrović, Rada; Janaćković, Đorđe

(Elsevier Sci Ltd, Oxford, 2010)

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Zalite, Ilmars
AU  - Palcevskis, Eriks
AU  - Smičiklas, Ivana D.
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2010
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1683
AB  - The effect of microwave sintering conditions on the microstructure, phase composition and mechanical properties of materials based on hydroxyapatite (HAP) and tricalcium phosphate (TCP) was investigated. Fine grained monophase HAP and biphasic HAP/TCP biomaterials were processed starting from stoichiometric and calcium deficient nanosized HAP powders. The HAP samples microwave (MAT) sintered for 15 min at 900 degrees C, with average grain size of 130 nm, showed better densification, higher density and certainly higher hardness and fracture toughness than samples conventionally sintered for 2 h at the same temperature. By comparing MW sintered HAP and HAP/TCP samples, it was concluded that pure HAP ceramics have superior mechanical properties. For monophase MW sintered HAP samples, the decrease in the grain size from 1.59 mu m to 130 nm led to an increase in the fracture toughness from 0.85 MPa m(1/2) to 1.3 MPa m(1/2).
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Microwave sintering of fine grained HAP and HAP/TCP bioceramics
EP  - 603
IS  - 2
SP  - 595
VL  - 36
DO  - 10.1016/j.ceramint.2009.09.038
ER  - 
@article{
author = "Veljović, Đorđe and Zalite, Ilmars and Palcevskis, Eriks and Smičiklas, Ivana D. and Petrović, Rada and Janaćković, Đorđe",
year = "2010",
abstract = "The effect of microwave sintering conditions on the microstructure, phase composition and mechanical properties of materials based on hydroxyapatite (HAP) and tricalcium phosphate (TCP) was investigated. Fine grained monophase HAP and biphasic HAP/TCP biomaterials were processed starting from stoichiometric and calcium deficient nanosized HAP powders. The HAP samples microwave (MAT) sintered for 15 min at 900 degrees C, with average grain size of 130 nm, showed better densification, higher density and certainly higher hardness and fracture toughness than samples conventionally sintered for 2 h at the same temperature. By comparing MW sintered HAP and HAP/TCP samples, it was concluded that pure HAP ceramics have superior mechanical properties. For monophase MW sintered HAP samples, the decrease in the grain size from 1.59 mu m to 130 nm led to an increase in the fracture toughness from 0.85 MPa m(1/2) to 1.3 MPa m(1/2).",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Microwave sintering of fine grained HAP and HAP/TCP bioceramics",
pages = "603-595",
number = "2",
volume = "36",
doi = "10.1016/j.ceramint.2009.09.038"
}
Veljović, Đ., Zalite, I., Palcevskis, E., Smičiklas, I. D., Petrović, R.,& Janaćković, Đ.. (2010). Microwave sintering of fine grained HAP and HAP/TCP bioceramics. in Ceramics International
Elsevier Sci Ltd, Oxford., 36(2), 595-603.
https://doi.org/10.1016/j.ceramint.2009.09.038
Veljović Đ, Zalite I, Palcevskis E, Smičiklas ID, Petrović R, Janaćković Đ. Microwave sintering of fine grained HAP and HAP/TCP bioceramics. in Ceramics International. 2010;36(2):595-603.
doi:10.1016/j.ceramint.2009.09.038 .
Veljović, Đorđe, Zalite, Ilmars, Palcevskis, Eriks, Smičiklas, Ivana D., Petrović, Rada, Janaćković, Đorđe, "Microwave sintering of fine grained HAP and HAP/TCP bioceramics" in Ceramics International, 36, no. 2 (2010):595-603,
https://doi.org/10.1016/j.ceramint.2009.09.038 . .
80
66
81

Processing of dense nanostructured HAP ceramics by sintering and hot pressing

Veljović, Đorđe; Jokić, Bojan; Petrović, Rada; Palcevskis, Eriks; Dindune, Antonija; Mihailescu, Ion N.; Janaćković, Đorđe

(Elsevier Sci Ltd, Oxford, 2009)

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 . .
87
78
86

Nanostructured bioglass thin films synthesized by pulsed laser deposition: CSLM, FTIR investigations and in vitro biotests

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

(Elsevier, Amsterdam, 2008)

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 . .
23
20
26

Double-layer bioactive glass coatings obtained by pulsed laser deposition

Tanasković, Dušanka; Veljović, Đorđe; Petrović, Rada; Janaćković, Đorđe; Mitrić, Miodrag; Cojanu, C.; Ristoscu, Carmen; Mihailescu, Ion N.

(Trans Tech Publications Ltd, Durnten-Zurich, 2008)

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 .
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Synthesis and characterization of bioglass thin films

Floroian, L.; Savu, B.; Sima, F.; Mihailescu, Ion N.; Tanasković, Dušanka; Janaćković, Đorđe

(Inst Materials Physics, Bucharest, 2007)

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 .
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