TY  - JOUR
AU  - Ćurčić, Milica
AU  - Hadžić, Branka
AU  - Gilić, Martina
AU  - Radojević, Vesna
AU  - Bjelajac, Anđelika
AU  - Radović, Ivana
AU  - Timotijević, Dejan
AU  - Romčević, Maja J.
AU  - Trajić, Jelena
AU  - Romčević, Nebojša Ž.
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4459
AB  - The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite.
PB  - Elsevier, Amsterdam
T2  - Physica E-Low-Dimensional Systems & Nanostructures
T1  - Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites
VL  - 115
DO  - 10.1016/j.physe.2019.113708
ER  - 

@article{
author = "Ćurčić, Milica and Hadžić, Branka and Gilić, Martina and Radojević, Vesna and Bjelajac, Anđelika and Radović, Ivana and Timotijević, Dejan and Romčević, Maja J. and Trajić, Jelena and Romčević, Nebojša Ž.",
year = "2020",
abstract = "The polymer nanocomposite ZnS/Poly (methylmethacrylate) was prepared by the solution casting method and its structural and optical properties were investigated using XRD, SEM, TEM, HRTEM, and Raman spectroscopy. The basic material, ZnS, has the cubic structure and its crystallite size was estimated to be 2.3 nm, which implies that a strong confinement regime is in effect. Analysis of Raman spectra was performed using the fitting procedure based on effective medium theory. As a result, the surface optical phonon (SOP) mode was detected. It was found that the shape and position of the SOP mode depend on the type of the composite.",
publisher = "Elsevier, Amsterdam",
journal = "Physica E-Low-Dimensional Systems & Nanostructures",
title = "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites",
volume = "115",
doi = "10.1016/j.physe.2019.113708"
}

Ćurčić, M., Hadžić, B., Gilić, M., Radojević, V., Bjelajac, A., Radović, I., Timotijević, D., Romčević, M. J., Trajić, J.,& Romčević, N. Ž.. (2020). Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E-Low-Dimensional Systems & Nanostructures
Elsevier, Amsterdam., 115.
https://doi.org/10.1016/j.physe.2019.113708

Ćurčić M, Hadžić B, Gilić M, Radojević V, Bjelajac A, Radović I, Timotijević D, Romčević MJ, Trajić J, Romčević NŽ. Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites. in Physica E-Low-Dimensional Systems & Nanostructures. 2020;115.
doi:10.1016/j.physe.2019.113708 .

Ćurčić, Milica, Hadžić, Branka, Gilić, Martina, Radojević, Vesna, Bjelajac, Anđelika, Radović, Ivana, Timotijević, Dejan, Romčević, Maja J., Trajić, Jelena, Romčević, Nebojša Ž., "Surface optical phonon (SOP) mode in ZnS/Poly (methylmethacrylate) nanocomposites" in Physica E-Low-Dimensional Systems & Nanostructures, 115 (2020),
https://doi.org/10.1016/j.physe.2019.113708 . .

TY  - JOUR
AU  - Brajović, Ljiljana
AU  - Stojanović, Dušica
AU  - Mihailović, Peđa
AU  - Marković, Smilja
AU  - Romčević, Maja J.
AU  - Mitrić, Miodrag
AU  - Lazović, Vladimir M.
AU  - Dramlić, Dragan
AU  - Petricević, Slobodan
AU  - Romčević, Nebojša Ž.
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3669
AB  - Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Preparation and characterization of bismuth germanium oxide (BGO) polymer composites
EP  - 849
SP  - 841
VL  - 695
DO  - 10.1016/j.jallcom.2016.10.140
ER  - 

@article{
author = "Brajović, Ljiljana and Stojanović, Dušica and Mihailović, Peđa and Marković, Smilja and Romčević, Maja J. and Mitrić, Miodrag and Lazović, Vladimir M. and Dramlić, Dragan and Petricević, Slobodan and Romčević, Nebojša Ž.",
year = "2017",
abstract = "Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites",
pages = "849-841",
volume = "695",
doi = "10.1016/j.jallcom.2016.10.140"
}

Brajović, L., Stojanović, D., Mihailović, P., Marković, S., Romčević, M. J., Mitrić, M., Lazović, V. M., Dramlić, D., Petricević, S.,& Romčević, N. Ž.. (2017). Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 695, 841-849.
https://doi.org/10.1016/j.jallcom.2016.10.140

Brajović L, Stojanović D, Mihailović P, Marković S, Romčević MJ, Mitrić M, Lazović VM, Dramlić D, Petricević S, Romčević NŽ. Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds. 2017;695:841-849.
doi:10.1016/j.jallcom.2016.10.140 .

Brajović, Ljiljana, Stojanović, Dušica, Mihailović, Peđa, Marković, Smilja, Romčević, Maja J., Mitrić, Miodrag, Lazović, Vladimir M., Dramlić, Dragan, Petricević, Slobodan, Romčević, Nebojša Ž., "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites" in Journal of Alloys and Compounds, 695 (2017):841-849,
https://doi.org/10.1016/j.jallcom.2016.10.140 . .

TY  - JOUR
AU  - Kostić, S.
AU  - Lazarević, Zorica Z.
AU  - Radojević, Vesna
AU  - Milutinović, A.
AU  - Romčević, Maja J.
AU  - Romčević, Nebojša Ž.
AU  - Valčić, Andreja
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3044
AB  - Yttrium aluminum garnet (YAG, Y3Al5O12) and yttrium aluminum garnet doped with neodymium (Nd:YAG) single crystals were grown by the Czochralski technique. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. As a result of our experiments, the transparent YAG and pale pink Nd:YAG single crystals were produced. The obtained crystals were studied by X-ray diffraction, Raman and IR spectroscopy. The crystal structure was confirmed by XRD. The 15 Raman and 17 IR modes were observed. The Raman and IR spectroscopy results are in accordance with X-ray diffraction analysis. The obtained YAG and Nd:YAG single crystals were without core and of good optical quality. The absence of a core was confirmed by viewing polished crystal slices. Also, it is important to emphasize that the obtained Nd:YAG single crystal has a concentration of 0.8 wt.% Nd3(+) that is characteristic for laser materials.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Materials Research Bulletin
T1  - Study of structural and optical properties of YAG and Nd:YAG single crystals
EP  - 87
SP  - 80
VL  - 63
DO  - 10.1016/j.materresbull.2014.11.033
ER  - 

@article{
author = "Kostić, S. and Lazarević, Zorica Z. and Radojević, Vesna and Milutinović, A. and Romčević, Maja J. and Romčević, Nebojša Ž. and Valčić, Andreja",
year = "2015",
abstract = "Yttrium aluminum garnet (YAG, Y3Al5O12) and yttrium aluminum garnet doped with neodymium (Nd:YAG) single crystals were grown by the Czochralski technique. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. As a result of our experiments, the transparent YAG and pale pink Nd:YAG single crystals were produced. The obtained crystals were studied by X-ray diffraction, Raman and IR spectroscopy. The crystal structure was confirmed by XRD. The 15 Raman and 17 IR modes were observed. The Raman and IR spectroscopy results are in accordance with X-ray diffraction analysis. The obtained YAG and Nd:YAG single crystals were without core and of good optical quality. The absence of a core was confirmed by viewing polished crystal slices. Also, it is important to emphasize that the obtained Nd:YAG single crystal has a concentration of 0.8 wt.% Nd3(+) that is characteristic for laser materials.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Materials Research Bulletin",
title = "Study of structural and optical properties of YAG and Nd:YAG single crystals",
pages = "87-80",
volume = "63",
doi = "10.1016/j.materresbull.2014.11.033"
}

Kostić, S., Lazarević, Z. Z., Radojević, V., Milutinović, A., Romčević, M. J., Romčević, N. Ž.,& Valčić, A.. (2015). Study of structural and optical properties of YAG and Nd:YAG single crystals. in Materials Research Bulletin
Pergamon-Elsevier Science Ltd, Oxford., 63, 80-87.
https://doi.org/10.1016/j.materresbull.2014.11.033

Kostić S, Lazarević ZZ, Radojević V, Milutinović A, Romčević MJ, Romčević NŽ, Valčić A. Study of structural and optical properties of YAG and Nd:YAG single crystals. in Materials Research Bulletin. 2015;63:80-87.
doi:10.1016/j.materresbull.2014.11.033 .

Kostić, S., Lazarević, Zorica Z., Radojević, Vesna, Milutinović, A., Romčević, Maja J., Romčević, Nebojša Ž., Valčić, Andreja, "Study of structural and optical properties of YAG and Nd:YAG single crystals" in Materials Research Bulletin, 63 (2015):80-87,
https://doi.org/10.1016/j.materresbull.2014.11.033 . .

TY  - JOUR
AU  - Kostić, S.
AU  - Lazarević, Zorica Z.
AU  - Romčević, Maja J.
AU  - Radojević, Vesna
AU  - Milutinović, A.
AU  - Stanisić, G.
AU  - Gilić, Martina
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2714
AB  - In this paper, we used the Czochralski method to obtain good quality yttrium aluminium garnet (YAG, Y3Al5O12) and yttrium aluminium garnet doped with neodymium (Nd: YAG) crystals. The investigations were based on the growth mechanisms and the shape of the liquid/solid interface crystallization front on the crystal properties and incorporation of Nd3+ ions. The obtained single YAG and Nd: YAG crystals were studied by use of x-ray diffraction, Raman and IR spectroscopy. There are strong metal oxygen vibrations in the region of 650-800 cm(-1) which are characteristics of Al-O bond: peaks at 784/854, 719/763 and 691/707 cm(-1) correspond to asymmetric stretching vibrations in tetrahedral arrangement. Peaks at 566/582, 510/547 and 477/505 cm(-1) are asymmetric stretching vibrations and 453/483 cm(-1) is the symmetric vibration of the Al-O bond in octahedral arrangements of the garnet structure. Lower energy peaks correspond to translation and vibration of cations in different coordinations-tetrahedral, octahedral and dodecahedral in the case of the lowest modes.
PB  - IOP Publishing Ltd, Bristol
T2  - Physica Scripta
T1  - Spectroscopic characterization of YAG and Nd:YAG single crystals
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014026
ER  - 

@article{
author = "Kostić, S. and Lazarević, Zorica Z. and Romčević, Maja J. and Radojević, Vesna and Milutinović, A. and Stanisić, G. and Gilić, Martina",
year = "2014",
abstract = "In this paper, we used the Czochralski method to obtain good quality yttrium aluminium garnet (YAG, Y3Al5O12) and yttrium aluminium garnet doped with neodymium (Nd: YAG) crystals. The investigations were based on the growth mechanisms and the shape of the liquid/solid interface crystallization front on the crystal properties and incorporation of Nd3+ ions. The obtained single YAG and Nd: YAG crystals were studied by use of x-ray diffraction, Raman and IR spectroscopy. There are strong metal oxygen vibrations in the region of 650-800 cm(-1) which are characteristics of Al-O bond: peaks at 784/854, 719/763 and 691/707 cm(-1) correspond to asymmetric stretching vibrations in tetrahedral arrangement. Peaks at 566/582, 510/547 and 477/505 cm(-1) are asymmetric stretching vibrations and 453/483 cm(-1) is the symmetric vibration of the Al-O bond in octahedral arrangements of the garnet structure. Lower energy peaks correspond to translation and vibration of cations in different coordinations-tetrahedral, octahedral and dodecahedral in the case of the lowest modes.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Physica Scripta",
title = "Spectroscopic characterization of YAG and Nd:YAG single crystals",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014026"
}

Kostić, S., Lazarević, Z. Z., Romčević, M. J., Radojević, V., Milutinović, A., Stanisić, G.,& Gilić, M.. (2014). Spectroscopic characterization of YAG and Nd:YAG single crystals. in Physica Scripta
IOP Publishing Ltd, Bristol., T162.
https://doi.org/10.1088/0031-8949/2014/T162/014026

Kostić S, Lazarević ZZ, Romčević MJ, Radojević V, Milutinović A, Stanisić G, Gilić M. Spectroscopic characterization of YAG and Nd:YAG single crystals. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014026 .

Kostić, S., Lazarević, Zorica Z., Romčević, Maja J., Radojević, Vesna, Milutinović, A., Stanisić, G., Gilić, Martina, "Spectroscopic characterization of YAG and Nd:YAG single crystals" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014026 . .

TY  - JOUR
AU  - Lazarević, Zorica Z.
AU  - Kostić, S.
AU  - Radojević, Vesna
AU  - Romčević, Maja J.
AU  - Gilić, Martina
AU  - Petrović-Damjanović, M.
AU  - Romčević, Nebojša Ž.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2459
AB  - In this work, single crystals of bismuth silicon oxide (BSO; Bi12SiO20) have been grown by the Czochralski method. The growth conditions were studied. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. The structure of the Bi12SiO20 has been investigated by x-ray diffraction (XRD), and Raman and Fourier transform infrared spectroscopy (FTIR) spectroscopy. The results obtained are discussed and compared with the published data. The pale yellow Bi12SiO20 single crystals prepared were without cores. Using spectroscopic measurements 19 Raman and 5 IR modes were observed.
PB  - IOP Publishing Ltd, Bristol
T2  - Physica Scripta
T1  - Raman spectroscopy of bismuth silicon oxide single crystals grown by the Czochralski technique
VL  - T157
DO  - 10.1088/0031-8949/2013/T157/014046
ER  - 

@article{
author = "Lazarević, Zorica Z. and Kostić, S. and Radojević, Vesna and Romčević, Maja J. and Gilić, Martina and Petrović-Damjanović, M. and Romčević, Nebojša Ž.",
year = "2013",
abstract = "In this work, single crystals of bismuth silicon oxide (BSO; Bi12SiO20) have been grown by the Czochralski method. The growth conditions were studied. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. The structure of the Bi12SiO20 has been investigated by x-ray diffraction (XRD), and Raman and Fourier transform infrared spectroscopy (FTIR) spectroscopy. The results obtained are discussed and compared with the published data. The pale yellow Bi12SiO20 single crystals prepared were without cores. Using spectroscopic measurements 19 Raman and 5 IR modes were observed.",
publisher = "IOP Publishing Ltd, Bristol",
journal = "Physica Scripta",
title = "Raman spectroscopy of bismuth silicon oxide single crystals grown by the Czochralski technique",
volume = "T157",
doi = "10.1088/0031-8949/2013/T157/014046"
}

Lazarević, Z. Z., Kostić, S., Radojević, V., Romčević, M. J., Gilić, M., Petrović-Damjanović, M.,& Romčević, N. Ž.. (2013). Raman spectroscopy of bismuth silicon oxide single crystals grown by the Czochralski technique. in Physica Scripta
IOP Publishing Ltd, Bristol., T157.
https://doi.org/10.1088/0031-8949/2013/T157/014046

Lazarević ZZ, Kostić S, Radojević V, Romčević MJ, Gilić M, Petrović-Damjanović M, Romčević NŽ. Raman spectroscopy of bismuth silicon oxide single crystals grown by the Czochralski technique. in Physica Scripta. 2013;T157.
doi:10.1088/0031-8949/2013/T157/014046 .

Lazarević, Zorica Z., Kostić, S., Radojević, Vesna, Romčević, Maja J., Gilić, Martina, Petrović-Damjanović, M., Romčević, Nebojša Ž., "Raman spectroscopy of bismuth silicon oxide single crystals grown by the Czochralski technique" in Physica Scripta, T157 (2013),
https://doi.org/10.1088/0031-8949/2013/T157/014046 . .

TY  - JOUR
AU  - Lazarević, Zorica Z.
AU  - Kostić, S.
AU  - Radojević, Vesna
AU  - Romčević, Maja J.
AU  - Hadžić, Branka
AU  - Trajić, Jelena
AU  - Romčević, Nebojša Ž.
PY  - 2013
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2549
AB  - In this work single crystals of bismuth germanium oxide (Bi12GeO20) have been grown by the Czochralski method. Growth conditions were studied. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. The structure of the Bi12GeO20 has been investigated by X-ray diffraction, Raman and FTIR spectroscopy. The obtained results are discussed and compared with published data. On the basis of the measurements by Raman spectroscopy, we observed 15 modes.
PB  - Natl Inst Optoelectronics, Bucharest-Magurele
T2  - Optoelectronics and Advanced Materials-Rapid Communications
T1  - Spectroscopy study of Bi12GeO20 single crystals
EP  - 61
IS  - 1-2
SP  - 58
VL  - 7
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2549
ER  - 

@article{
author = "Lazarević, Zorica Z. and Kostić, S. and Radojević, Vesna and Romčević, Maja J. and Hadžić, Branka and Trajić, Jelena and Romčević, Nebojša Ž.",
year = "2013",
abstract = "In this work single crystals of bismuth germanium oxide (Bi12GeO20) have been grown by the Czochralski method. Growth conditions were studied. The critical diameter and the critical rate of rotation were calculated. Suitable polishing and etching solutions were determined. The structure of the Bi12GeO20 has been investigated by X-ray diffraction, Raman and FTIR spectroscopy. The obtained results are discussed and compared with published data. On the basis of the measurements by Raman spectroscopy, we observed 15 modes.",
publisher = "Natl Inst Optoelectronics, Bucharest-Magurele",
journal = "Optoelectronics and Advanced Materials-Rapid Communications",
title = "Spectroscopy study of Bi12GeO20 single crystals",
pages = "61-58",
number = "1-2",
volume = "7",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2549"
}

Lazarević, Z. Z., Kostić, S., Radojević, V., Romčević, M. J., Hadžić, B., Trajić, J.,& Romčević, N. Ž.. (2013). Spectroscopy study of Bi12GeO20 single crystals. in Optoelectronics and Advanced Materials-Rapid Communications
Natl Inst Optoelectronics, Bucharest-Magurele., 7(1-2), 58-61.
https://hdl.handle.net/21.15107/rcub_technorep_2549

Lazarević ZZ, Kostić S, Radojević V, Romčević MJ, Hadžić B, Trajić J, Romčević NŽ. Spectroscopy study of Bi12GeO20 single crystals. in Optoelectronics and Advanced Materials-Rapid Communications. 2013;7(1-2):58-61.
https://hdl.handle.net/21.15107/rcub_technorep_2549 .

Lazarević, Zorica Z., Kostić, S., Radojević, Vesna, Romčević, Maja J., Hadžić, Branka, Trajić, Jelena, Romčević, Nebojša Ž., "Spectroscopy study of Bi12GeO20 single crystals" in Optoelectronics and Advanced Materials-Rapid Communications, 7, no. 1-2 (2013):58-61,
https://hdl.handle.net/21.15107/rcub_technorep_2549 .