TY  - JOUR
AU  - Popović, Maja
AU  - Novaković, Mirjana
AU  - Pjević, Dejan
AU  - Vana, Dušan
AU  - Jugović, Dragana
AU  - Tošić, Dragana
AU  - Noga, Pavol
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12279
AB  - In the present paper, the effects of metal ion implantation on the structural and optical properties of TiN thin films have been investigated. TiN films of 170 nm thickness were grown by d.c. reactive sputtering on Si (100) wafers and then irradiated at 5 × 1016 ions/cm2 with either Au, Ag, or Cu ions by using two different energies per each implanted metal. The results showed that as deposited TiN crystallizes in the form of a fcc cubic structure, with the crystallites preferentially oriented along the (111) plane. For all implanted layers, the cubic structure was preserved, but compared to as deposited TiN the crystallites were smaller and the lattice was contracted. These changes were correlated with the depth distribution of Au, Ag and Cu ions and assigned to implantation-induced damage that was larger when higher ion energies were used. High-resolution XPS spectra of the surface of as deposited sample showed the coexistence of TiN, TiO2 and TiOxNy phases and this was related to the surface oxidation of the films due to the exposure to air. After implantation, the results were almost similar for all metals, showing an increase in TiO2 contribution and the formation of pure metallic Au and Ag phases, while copper is in the Cu2+ state, which is attributed to Cu(II)-oxide and Cu(OH)2. The microstructural characteristics including defect formation, changes in crystallite size and lattice contraction, and also growth of different metallic phases during implantations were correlated with the findings of the optical characterization of the implanted films. For the as deposited film we found an energy gap of 2.91 eV, which was lower than the value typical for TiN. After implantation the gap was shifted to higher energies, while at the visible part of the region, the existence of additional energy levels, at photon energies below 2.9 eV was observed. Besides, all implanted films showed degraded photocatalytic activity compared to as deposited TiN, among which Cu-implanted samples exhibited the best photocatalytic performances. The lower photocatalytic activity of Au and Ag implanted films compared to Cu implantations was ascribed to larger structural defects and the formation of less favorable electronic states.
T2  - Journal of Alloys and Compounds
T1  - Investigating on the microstructure and optical properties of Au, Ag and Cu implanted TiN thin films: The effects of surface oxidation and ion-induced defects
VL  - 976
SP  - 173046
DO  - 10.1016/j.jallcom.2023.173046
ER  - 

@article{
author = "Popović, Maja and Novaković, Mirjana and Pjević, Dejan and Vana, Dušan and Jugović, Dragana and Tošić, Dragana and Noga, Pavol",
year = "2024",
abstract = "In the present paper, the effects of metal ion implantation on the structural and optical properties of TiN thin films have been investigated. TiN films of 170 nm thickness were grown by d.c. reactive sputtering on Si (100) wafers and then irradiated at 5 × 1016 ions/cm2 with either Au, Ag, or Cu ions by using two different energies per each implanted metal. The results showed that as deposited TiN crystallizes in the form of a fcc cubic structure, with the crystallites preferentially oriented along the (111) plane. For all implanted layers, the cubic structure was preserved, but compared to as deposited TiN the crystallites were smaller and the lattice was contracted. These changes were correlated with the depth distribution of Au, Ag and Cu ions and assigned to implantation-induced damage that was larger when higher ion energies were used. High-resolution XPS spectra of the surface of as deposited sample showed the coexistence of TiN, TiO2 and TiOxNy phases and this was related to the surface oxidation of the films due to the exposure to air. After implantation, the results were almost similar for all metals, showing an increase in TiO2 contribution and the formation of pure metallic Au and Ag phases, while copper is in the Cu2+ state, which is attributed to Cu(II)-oxide and Cu(OH)2. The microstructural characteristics including defect formation, changes in crystallite size and lattice contraction, and also growth of different metallic phases during implantations were correlated with the findings of the optical characterization of the implanted films. For the as deposited film we found an energy gap of 2.91 eV, which was lower than the value typical for TiN. After implantation the gap was shifted to higher energies, while at the visible part of the region, the existence of additional energy levels, at photon energies below 2.9 eV was observed. Besides, all implanted films showed degraded photocatalytic activity compared to as deposited TiN, among which Cu-implanted samples exhibited the best photocatalytic performances. The lower photocatalytic activity of Au and Ag implanted films compared to Cu implantations was ascribed to larger structural defects and the formation of less favorable electronic states.",
journal = "Journal of Alloys and Compounds",
title = "Investigating on the microstructure and optical properties of Au, Ag and Cu implanted TiN thin films: The effects of surface oxidation and ion-induced defects",
volume = "976",
pages = "173046",
doi = "10.1016/j.jallcom.2023.173046"
}

Popović, M., Novaković, M., Pjević, D., Vana, D., Jugović, D., Tošić, D.,& Noga, P.. (2024). Investigating on the microstructure and optical properties of Au, Ag and Cu implanted TiN thin films: The effects of surface oxidation and ion-induced defects. in Journal of Alloys and Compounds, 976, 173046.
https://doi.org/10.1016/j.jallcom.2023.173046

Popović M, Novaković M, Pjević D, Vana D, Jugović D, Tošić D, Noga P. Investigating on the microstructure and optical properties of Au, Ag and Cu implanted TiN thin films: The effects of surface oxidation and ion-induced defects. in Journal of Alloys and Compounds. 2024;976:173046.
doi:10.1016/j.jallcom.2023.173046 .

Popović, Maja, Novaković, Mirjana, Pjević, Dejan, Vana, Dušan, Jugović, Dragana, Tošić, Dragana, Noga, Pavol, "Investigating on the microstructure and optical properties of Au, Ag and Cu implanted TiN thin films: The effects of surface oxidation and ion-induced defects" in Journal of Alloys and Compounds, 976 (2024):173046,
https://doi.org/10.1016/j.jallcom.2023.173046 . .

TY  - CONF
AU  - Đoković, Vladimir
AU  - Pajović, Jelena
AU  - Dojčilović, Radovan
AU  - Božanić, Dušan
AU  - Tošić, Dragana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13089
AB  - This study reports on the optical properties of hybrid nanostructures that comprise gold nanoparticles (Au NPs) and biomolecule riboflavin (vitamin B2, Rb). The riboflavin is photosensitizing molecule and the generation of reactive oxygen species (ROS) by the hybrid nanoparticles was tested in various aqueous and biological environments. It was shown that the gold nanoparticles enhanced the photosensitizing activity of riboflavin. A comparison of EPR spectra obtained for the Au nanoparticle colloid, hybrid nanoparticle colloid and molecular water solution revealed that the strongest ROS signal came from the AuRb nanosystem. Furthermore, the ROS signal stability was much higher than that of the molecular solution, with a time span of several minutes. Photodynamic activity of the AuRb hybrids was tested by using gram-negative bacterium Escherichia coli as a model system. The bacteria were incubated by AuRb nanoparticles and the survival rate of the colonies was investigated by fluorescent bioimaging. The obtain results provide new insights on photosensitizer’s activities and suggest advantages of using metal-based nanoplatforms for developing of novel agents for photodynamic therapies.
PB  - Belgrade : Institute of Physics
C3  - 16th Photonics Workshop : Book of abstracts
T1  - Gold-riboflavin hybrid nanostrucutures as possible photodynamic therapy agents
SP  - 52
EP  - 52
UR  - https://hdl.handle.net/21.15107/rcub_vinar_13089
ER  - 

@conference{
author = "Đoković, Vladimir and Pajović, Jelena and Dojčilović, Radovan and Božanić, Dušan and Tošić, Dragana",
year = "2023",
abstract = "This study reports on the optical properties of hybrid nanostructures that comprise gold nanoparticles (Au NPs) and biomolecule riboflavin (vitamin B2, Rb). The riboflavin is photosensitizing molecule and the generation of reactive oxygen species (ROS) by the hybrid nanoparticles was tested in various aqueous and biological environments. It was shown that the gold nanoparticles enhanced the photosensitizing activity of riboflavin. A comparison of EPR spectra obtained for the Au nanoparticle colloid, hybrid nanoparticle colloid and molecular water solution revealed that the strongest ROS signal came from the AuRb nanosystem. Furthermore, the ROS signal stability was much higher than that of the molecular solution, with a time span of several minutes. Photodynamic activity of the AuRb hybrids was tested by using gram-negative bacterium Escherichia coli as a model system. The bacteria were incubated by AuRb nanoparticles and the survival rate of the colonies was investigated by fluorescent bioimaging. The obtain results provide new insights on photosensitizer’s activities and suggest advantages of using metal-based nanoplatforms for developing of novel agents for photodynamic therapies.",
publisher = "Belgrade : Institute of Physics",
journal = "16th Photonics Workshop : Book of abstracts",
title = "Gold-riboflavin hybrid nanostrucutures as possible photodynamic therapy agents",
pages = "52-52",
url = "https://hdl.handle.net/21.15107/rcub_vinar_13089"
}

Đoković, V., Pajović, J., Dojčilović, R., Božanić, D.,& Tošić, D.. (2023). Gold-riboflavin hybrid nanostrucutures as possible photodynamic therapy agents. in 16th Photonics Workshop : Book of abstracts
Belgrade : Institute of Physics., 52-52.
https://hdl.handle.net/21.15107/rcub_vinar_13089

Đoković V, Pajović J, Dojčilović R, Božanić D, Tošić D. Gold-riboflavin hybrid nanostrucutures as possible photodynamic therapy agents. in 16th Photonics Workshop : Book of abstracts. 2023;:52-52.
https://hdl.handle.net/21.15107/rcub_vinar_13089 .

Đoković, Vladimir, Pajović, Jelena, Dojčilović, Radovan, Božanić, Dušan, Tošić, Dragana, "Gold-riboflavin hybrid nanostrucutures as possible photodynamic therapy agents" in 16th Photonics Workshop : Book of abstracts (2023):52-52,
https://hdl.handle.net/21.15107/rcub_vinar_13089 .

TY  - JOUR
AU  - Danilović, Danijela
AU  - Trpkov, Đorđe
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Pajović, Jelena
AU  - Škipina, Blanka
AU  - Dudić, Duško
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12650
AB  - This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids
T2  - Contemporary Materials
T1  - Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium
T1  - Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију
VL  - 14
IS  - 1
SP  - 25
EP  - 29
DO  - 10.7251/COMEN2301025D
ER  - 

@article{
author = "Danilović, Danijela and Trpkov, Đorđe and Dojčilović, Radovan and Tošić, Dragana and Pajović, Jelena and Škipina, Blanka and Dudić, Duško",
year = "2023",
abstract = "This article reports on photodielectric properties of hydrocolloids of TiO2  particles and Au/TiO2 hybrid particles of lateral dimension of ∼200 nm. Illumination of the colloids with visible light did not cause measurable changes in their electrical conductivity, while the application of UV (365 nm) light led to photoinduced increase in conductivity of up to 2%. The photogeneration of ions in water, regardless of the presence of the particles, makes a dominant contribution to the photoinduced increase in conductivity of the colloids",
journal = "Contemporary Materials",
title = "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium, Фотодиелектрична карактеризација светлосног погона Au/TiO2 наномотори у течном медију",
volume = "14",
number = "1",
pages = "25-29",
doi = "10.7251/COMEN2301025D"
}

Danilović, D., Trpkov, Đ., Dojčilović, R., Tošić, D., Pajović, J., Škipina, B.,& Dudić, D.. (2023). Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials, 14(1), 25-29.
https://doi.org/10.7251/COMEN2301025D

Danilović D, Trpkov Đ, Dojčilović R, Tošić D, Pajović J, Škipina B, Dudić D. Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium. in Contemporary Materials. 2023;14(1):25-29.
doi:10.7251/COMEN2301025D .

Danilović, Danijela, Trpkov, Đorđe, Dojčilović, Radovan, Tošić, Dragana, Pajović, Jelena, Škipina, Blanka, Dudić, Duško, "Photodielectric characterization of light-driven Au/TiO2 nanomotors in liquid medium" in Contemporary Materials, 14, no. 1 (2023):25-29,
https://doi.org/10.7251/COMEN2301025D . .

TY  - CONF
AU  - Trpkov, Đorđe
AU  - Sredojević, Dušan
AU  - Tošić, Dragana
AU  - Pajović, J.
AU  - Božanić, Dušan K.
AU  - Đoković, Vladimir
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11806
AB  - Graphene quantum dots, zero-dimensional form of graphene, have a band gap that can be controlled by changing their size, shape, edge morphology, number of layers etc. Moreover, they have various edge terminations that can be physically/chemically functionalized for numerous applications in nano electronics, biosensors, supercapacitors, and nanomedicine. In the present study, we hydrothermally synthesized nitrogen-doped graphene quantum dots (NGQD), using simple, fast synthetic route and eco-friendly chemicals, such as citric acid and urea (amine group-rich). The obtained NGQD were physically functionalized by L-phenylalanine, aromatic amino acid with interesting fluorescent properties. The hybrid NGQD-LPhe samples were characterized with UV/Vis, Raman, ATR Fourier transformed infra-red and photoluminescence (PL) spectroscopies, while their morphologies were studied by using atomic force microscopy. This work created a base for future investigations on graphene/biomolecules hybrids and their applications in fields of bioimaging and drug delivery. In addition, the experimental results were supported by DFT calculations of non-covalent stacking and hydrogen bonding interactions between NGQD and biomolecules.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Yellow fluorescent, water soluble N-doped graphene quantum dots: synthesis, photoluminescence and functionalization with L-Phenylalanine
SP  - 66
EP  - 66
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11806
ER  - 

@conference{
author = "Trpkov, Đorđe and Sredojević, Dušan and Tošić, Dragana and Pajović, J. and Božanić, Dušan K. and Đoković, Vladimir",
year = "2023",
abstract = "Graphene quantum dots, zero-dimensional form of graphene, have a band gap that can be controlled by changing their size, shape, edge morphology, number of layers etc. Moreover, they have various edge terminations that can be physically/chemically functionalized for numerous applications in nano electronics, biosensors, supercapacitors, and nanomedicine. In the present study, we hydrothermally synthesized nitrogen-doped graphene quantum dots (NGQD), using simple, fast synthetic route and eco-friendly chemicals, such as citric acid and urea (amine group-rich). The obtained NGQD were physically functionalized by L-phenylalanine, aromatic amino acid with interesting fluorescent properties. The hybrid NGQD-LPhe samples were characterized with UV/Vis, Raman, ATR Fourier transformed infra-red and photoluminescence (PL) spectroscopies, while their morphologies were studied by using atomic force microscopy. This work created a base for future investigations on graphene/biomolecules hybrids and their applications in fields of bioimaging and drug delivery. In addition, the experimental results were supported by DFT calculations of non-covalent stacking and hydrogen bonding interactions between NGQD and biomolecules.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Yellow fluorescent, water soluble N-doped graphene quantum dots: synthesis, photoluminescence and functionalization with L-Phenylalanine",
pages = "66-66",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11806"
}

Trpkov, Đ., Sredojević, D., Tošić, D., Pajović, J., Božanić, D. K.,& Đoković, V.. (2023). Yellow fluorescent, water soluble N-doped graphene quantum dots: synthesis, photoluminescence and functionalization with L-Phenylalanine. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 66-66.
https://hdl.handle.net/21.15107/rcub_vinar_11806

Trpkov Đ, Sredojević D, Tošić D, Pajović J, Božanić DK, Đoković V. Yellow fluorescent, water soluble N-doped graphene quantum dots: synthesis, photoluminescence and functionalization with L-Phenylalanine. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:66-66.
https://hdl.handle.net/21.15107/rcub_vinar_11806 .

Trpkov, Đorđe, Sredojević, Dušan, Tošić, Dragana, Pajović, J., Božanić, Dušan K., Đoković, Vladimir, "Yellow fluorescent, water soluble N-doped graphene quantum dots: synthesis, photoluminescence and functionalization with L-Phenylalanine" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):66-66,
https://hdl.handle.net/21.15107/rcub_vinar_11806 .

TY  - CONF
AU  - Tošić, Dragana
AU  - Dojčilović, R.
AU  - Božanić, D.
AU  - Trpkov, Đorđe
AU  - Đoković, Vladimir
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11807
AB  - Anthocyanins are water-soluble, non-toxic flavonoid pigments, which produce the blue, red and purple color of many plants. Color change of anthocyanin extracts is a direct consequence of the transformation of their chemical structure when exposed to different pH conditions. Optical properties investigated in UV-Vis absorption and PL spectra show a clear difference between anthocyanins in acidic and in alkaline environments. Chitosan, a natural-based, non-toxic and biodegradable polysaccharide, is chosen as an ideal matrix for nanocomposites. It is proven to be a good carrier for anthocyanins, because of its ability to entrap the indicator dyes and at the same time the ability to release anthocyanins when in contact with an acidic environment. In this research, we have developed anthocyanin-enhanced biopolymer indicator systems, which provide fast colorimetric response to alterations in pH levels of the environment. Transmittance spectra of nanocomposites show excellent light-blocking properties of the films. This opens up possibilities for advancement in future technology of smart biodegradable food packaging biomaterials. The availability of innovative and healthy materials reduces the need for using synthetic plastic in the modern food industry.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Anthocyanin-functionalized biopolymer films as pH-sensitive indicators
SP  - 69
EP  - 69
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11807
ER  - 

@conference{
author = "Tošić, Dragana and Dojčilović, R. and Božanić, D. and Trpkov, Đorđe and Đoković, Vladimir",
year = "2023",
abstract = "Anthocyanins are water-soluble, non-toxic flavonoid pigments, which produce the blue, red and purple color of many plants. Color change of anthocyanin extracts is a direct consequence of the transformation of their chemical structure when exposed to different pH conditions. Optical properties investigated in UV-Vis absorption and PL spectra show a clear difference between anthocyanins in acidic and in alkaline environments. Chitosan, a natural-based, non-toxic and biodegradable polysaccharide, is chosen as an ideal matrix for nanocomposites. It is proven to be a good carrier for anthocyanins, because of its ability to entrap the indicator dyes and at the same time the ability to release anthocyanins when in contact with an acidic environment. In this research, we have developed anthocyanin-enhanced biopolymer indicator systems, which provide fast colorimetric response to alterations in pH levels of the environment. Transmittance spectra of nanocomposites show excellent light-blocking properties of the films. This opens up possibilities for advancement in future technology of smart biodegradable food packaging biomaterials. The availability of innovative and healthy materials reduces the need for using synthetic plastic in the modern food industry.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Anthocyanin-functionalized biopolymer films as pH-sensitive indicators",
pages = "69-69",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11807"
}

Tošić, D., Dojčilović, R., Božanić, D., Trpkov, Đ.,& Đoković, V.. (2023). Anthocyanin-functionalized biopolymer films as pH-sensitive indicators. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 69-69.
https://hdl.handle.net/21.15107/rcub_vinar_11807

Tošić D, Dojčilović R, Božanić D, Trpkov Đ, Đoković V. Anthocyanin-functionalized biopolymer films as pH-sensitive indicators. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:69-69.
https://hdl.handle.net/21.15107/rcub_vinar_11807 .

Tošić, Dragana, Dojčilović, R., Božanić, D., Trpkov, Đorđe, Đoković, Vladimir, "Anthocyanin-functionalized biopolymer films as pH-sensitive indicators" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):69-69,
https://hdl.handle.net/21.15107/rcub_vinar_11807 .

TY  - JOUR
AU  - Filipović, Suzana
AU  - Obradović, Nina
AU  - Corlett, Cole
AU  - Fahrenholtz, William G.
AU  - Rosenschon, Martin
AU  - Füglein, Ekkehard
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Petrović, Jovana
AU  - Đorđević, Antonije
AU  - Vlahović, Branislav
AU  - Pavlović, Vladimir B.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12400
AB  - Ceramic/polymer composites can be chemically stable, mechanically strong, and flexible, which make them candidates for electric devices, such as pressure or temperature sensors, energy storage or harvesting devices, actuators, and so forth. Depending on the application, various electrical properties are of importance. Polymers usually have low dielectric permittivity, but increased dielectric permittivity can be achieved by the addition of the ceramic fillers with high dielectric constant. With the aim to enhance dielectric properties of the composite without loss of flexibility, 5 wt% of BaTiO3-Fe2O3 powder was added into a polyvinylidene fluoride matrix. The powder was prepared by different synthesis conditions to produce core/shell structures. The effect of the phase composition and morphology of the BaTiO3-Fe2O3 core/shell filler on the structure and lattice dynamics of the polymer composites was investigated. Based on the results of the thermal analysis, various parameters of ceramic/polymer composites were determined. Differences in the phase composition and morphology of the filler have an influence on the formation of various polyvinylidene fluoride allomorphs and the degree of crystallinity. Furthermore, the dielectric performances of pure polyvinylidene fluoride and the polymer/ceramic composites were measured.
T2  - Journal of Applied Polymer Science
T1  - Effect of the filler morphology on the crystallization behavior and dielectric properties of the polyvinylidene fluoride‐based composite
DO  - 10.1002/app.55040
ER  - 

@article{
author = "Filipović, Suzana and Obradović, Nina and Corlett, Cole and Fahrenholtz, William G. and Rosenschon, Martin and Füglein, Ekkehard and Dojčilović, Radovan and Tošić, Dragana and Petrović, Jovana and Đorđević, Antonije and Vlahović, Branislav and Pavlović, Vladimir B.",
year = "2023",
abstract = "Ceramic/polymer composites can be chemically stable, mechanically strong, and flexible, which make them candidates for electric devices, such as pressure or temperature sensors, energy storage or harvesting devices, actuators, and so forth. Depending on the application, various electrical properties are of importance. Polymers usually have low dielectric permittivity, but increased dielectric permittivity can be achieved by the addition of the ceramic fillers with high dielectric constant. With the aim to enhance dielectric properties of the composite without loss of flexibility, 5 wt% of BaTiO3-Fe2O3 powder was added into a polyvinylidene fluoride matrix. The powder was prepared by different synthesis conditions to produce core/shell structures. The effect of the phase composition and morphology of the BaTiO3-Fe2O3 core/shell filler on the structure and lattice dynamics of the polymer composites was investigated. Based on the results of the thermal analysis, various parameters of ceramic/polymer composites were determined. Differences in the phase composition and morphology of the filler have an influence on the formation of various polyvinylidene fluoride allomorphs and the degree of crystallinity. Furthermore, the dielectric performances of pure polyvinylidene fluoride and the polymer/ceramic composites were measured.",
journal = "Journal of Applied Polymer Science",
title = "Effect of the filler morphology on the crystallization behavior and dielectric properties of the polyvinylidene fluoride‐based composite",
doi = "10.1002/app.55040"
}

Filipović, S., Obradović, N., Corlett, C., Fahrenholtz, W. G., Rosenschon, M., Füglein, E., Dojčilović, R., Tošić, D., Petrović, J., Đorđević, A., Vlahović, B.,& Pavlović, V. B.. (2023). Effect of the filler morphology on the crystallization behavior and dielectric properties of the polyvinylidene fluoride‐based composite. in Journal of Applied Polymer Science.
https://doi.org/10.1002/app.55040

Filipović S, Obradović N, Corlett C, Fahrenholtz WG, Rosenschon M, Füglein E, Dojčilović R, Tošić D, Petrović J, Đorđević A, Vlahović B, Pavlović VB. Effect of the filler morphology on the crystallization behavior and dielectric properties of the polyvinylidene fluoride‐based composite. in Journal of Applied Polymer Science. 2023;.
doi:10.1002/app.55040 .

Filipović, Suzana, Obradović, Nina, Corlett, Cole, Fahrenholtz, William G., Rosenschon, Martin, Füglein, Ekkehard, Dojčilović, Radovan, Tošić, Dragana, Petrović, Jovana, Đorđević, Antonije, Vlahović, Branislav, Pavlović, Vladimir B., "Effect of the filler morphology on the crystallization behavior and dielectric properties of the polyvinylidene fluoride‐based composite" in Journal of Applied Polymer Science (2023),
https://doi.org/10.1002/app.55040 . .

TY  - JOUR
AU  - Božinović, Nevena
AU  - Savva, Kyriaki
AU  - Rajić, Vladimir
AU  - Popović, Maja
AU  - Tošić, Dragana
AU  - Janjetović, Kristina
AU  - Despotović, Ana
AU  - Zogović, Nevena
AU  - Stratakis, Emmanuel
AU  - Petrović, Suzana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11547
AB  - The creation of novel biocompatible Ti-based thin films with a Zr or Cu sub-layer modified by ultrafast laser processing is studied. To prepare bioactive surfaces, ultrafast laser processing is focused on the formation of laser-induced periodic surface structures (LIPSS) with the production of oxide phases at the surfaces. Two differently designed multilayer thin films Ti/Cu/Ti and Ti/Zr/Ti were deposited on the silicon using the ion sputtering method. The Ti thin film contains Cu or Zr sub-layer (thickness of 10 nm) at the 10 nm below the surface. The composition and surface morphology variations for these systems, deposited and laser-processed under the same experimental conditions, were caused only by different thermo-physical properties of the sub-layer (Cu or Zr). The surface morphology in the form of LIPSS, led to improved cell adhesion and stable cells/thin films interface compared to as-deposited samples. Field-emission scanning electron microscopy and MTT analysis revealed that laser processing of both systems increased cell adhesion, proliferation, and metabolical activity of L929 mouse fibroblast cells compared to non-modified flat surfaces. Overall, the biocompatibility of Zrcontaining thin films is better than Ti/Cu/Ti system. Further, laser processing and formation of LIPSS makes Ti/Zr/Ti thin films excellent candidate for biomedical
T2  - Materials Chemistry and Physics
T1  - Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films
VL  - 308
SP  - 128286
DO  - 10.1016/j.matchemphys.2023.128286
ER  - 

@article{
author = "Božinović, Nevena and Savva, Kyriaki and Rajić, Vladimir and Popović, Maja and Tošić, Dragana and Janjetović, Kristina and Despotović, Ana and Zogović, Nevena and Stratakis, Emmanuel and Petrović, Suzana",
year = "2023",
abstract = "The creation of novel biocompatible Ti-based thin films with a Zr or Cu sub-layer modified by ultrafast laser processing is studied. To prepare bioactive surfaces, ultrafast laser processing is focused on the formation of laser-induced periodic surface structures (LIPSS) with the production of oxide phases at the surfaces. Two differently designed multilayer thin films Ti/Cu/Ti and Ti/Zr/Ti were deposited on the silicon using the ion sputtering method. The Ti thin film contains Cu or Zr sub-layer (thickness of 10 nm) at the 10 nm below the surface. The composition and surface morphology variations for these systems, deposited and laser-processed under the same experimental conditions, were caused only by different thermo-physical properties of the sub-layer (Cu or Zr). The surface morphology in the form of LIPSS, led to improved cell adhesion and stable cells/thin films interface compared to as-deposited samples. Field-emission scanning electron microscopy and MTT analysis revealed that laser processing of both systems increased cell adhesion, proliferation, and metabolical activity of L929 mouse fibroblast cells compared to non-modified flat surfaces. Overall, the biocompatibility of Zrcontaining thin films is better than Ti/Cu/Ti system. Further, laser processing and formation of LIPSS makes Ti/Zr/Ti thin films excellent candidate for biomedical",
journal = "Materials Chemistry and Physics",
title = "Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films",
volume = "308",
pages = "128286",
doi = "10.1016/j.matchemphys.2023.128286"
}

Božinović, N., Savva, K., Rajić, V., Popović, M., Tošić, D., Janjetović, K., Despotović, A., Zogović, N., Stratakis, E.,& Petrović, S.. (2023). Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films. in Materials Chemistry and Physics, 308, 128286.
https://doi.org/10.1016/j.matchemphys.2023.128286

Božinović N, Savva K, Rajić V, Popović M, Tošić D, Janjetović K, Despotović A, Zogović N, Stratakis E, Petrović S. Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films. in Materials Chemistry and Physics. 2023;308:128286.
doi:10.1016/j.matchemphys.2023.128286 .

Božinović, Nevena, Savva, Kyriaki, Rajić, Vladimir, Popović, Maja, Tošić, Dragana, Janjetović, Kristina, Despotović, Ana, Zogović, Nevena, Stratakis, Emmanuel, Petrović, Suzana, "Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films" in Materials Chemistry and Physics, 308 (2023):128286,
https://doi.org/10.1016/j.matchemphys.2023.128286 . .

TY  - JOUR
AU  - Danilović, Danijela
AU  - Milosavljević, Aleksandar R.
AU  - Sapkota, Pitambar
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Vukmirović, Nenad
AU  - Jocić, Milan
AU  - Đoković, Vladimir
AU  - Ptasinska, Sylwia
AU  - Božanić, Dušan K.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10402
AB  - Silver–bismuth iodide (Ag–Bi–I) rudorffites are chemically stable and non-toxic materials that can act as a possible lead-free replacement for methylammonium lead halides in optoelectronic applications. We report on a simple route for fabricating Ag–Bi–I colloidal nanoplatelets approximately 160 nm in lateral dimensions and 1–8 nm in thickness via exfoliation of Ag–Bi–I rudorffite powders in acetonitrile. The valence band electronic structure of isolated Ag–Bi–I nanoplatelets was investigated using synchrotron radiation to perform X-ray aerosol photoelectron spectroscopy (XAPS). The ionization energy of the material was found to be 6.1 ± 0.2 eV with respect to the vacuum level. UV–vis absorption and photoluminescence spectroscopies of the Ag–Bi–I colloids showed that the optical properties of the nanoplatelets originate from I 5p to Bi 6p and I 5p to I 5p transitions, which is further confirmed by density functional theory (DFT) calculations. Finally, calculations based on the DFT and k · p theoretical methods showed that the quantum confinement effect is very weak in the system studied.
T2  - The Journal of Physical Chemistry C
T1  - Electronic Properties of Silver–Bismuth Iodide Rudorffite Nanoplatelets
VL  - 126
IS  - 32
SP  - 13739
EP  - 13747
DO  - 10.1021/acs.jpcc.2c03208
ER  - 

@article{
author = "Danilović, Danijela and Milosavljević, Aleksandar R. and Sapkota, Pitambar and Dojčilović, Radovan and Tošić, Dragana and Vukmirović, Nenad and Jocić, Milan and Đoković, Vladimir and Ptasinska, Sylwia and Božanić, Dušan K.",
year = "2022",
abstract = "Silver–bismuth iodide (Ag–Bi–I) rudorffites are chemically stable and non-toxic materials that can act as a possible lead-free replacement for methylammonium lead halides in optoelectronic applications. We report on a simple route for fabricating Ag–Bi–I colloidal nanoplatelets approximately 160 nm in lateral dimensions and 1–8 nm in thickness via exfoliation of Ag–Bi–I rudorffite powders in acetonitrile. The valence band electronic structure of isolated Ag–Bi–I nanoplatelets was investigated using synchrotron radiation to perform X-ray aerosol photoelectron spectroscopy (XAPS). The ionization energy of the material was found to be 6.1 ± 0.2 eV with respect to the vacuum level. UV–vis absorption and photoluminescence spectroscopies of the Ag–Bi–I colloids showed that the optical properties of the nanoplatelets originate from I 5p to Bi 6p and I 5p to I 5p transitions, which is further confirmed by density functional theory (DFT) calculations. Finally, calculations based on the DFT and k · p theoretical methods showed that the quantum confinement effect is very weak in the system studied.",
journal = "The Journal of Physical Chemistry C",
title = "Electronic Properties of Silver–Bismuth Iodide Rudorffite Nanoplatelets",
volume = "126",
number = "32",
pages = "13739-13747",
doi = "10.1021/acs.jpcc.2c03208"
}

Danilović, D., Milosavljević, A. R., Sapkota, P., Dojčilović, R., Tošić, D., Vukmirović, N., Jocić, M., Đoković, V., Ptasinska, S.,& Božanić, D. K.. (2022). Electronic Properties of Silver–Bismuth Iodide Rudorffite Nanoplatelets. in The Journal of Physical Chemistry C, 126(32), 13739-13747.
https://doi.org/10.1021/acs.jpcc.2c03208

Danilović D, Milosavljević AR, Sapkota P, Dojčilović R, Tošić D, Vukmirović N, Jocić M, Đoković V, Ptasinska S, Božanić DK. Electronic Properties of Silver–Bismuth Iodide Rudorffite Nanoplatelets. in The Journal of Physical Chemistry C. 2022;126(32):13739-13747.
doi:10.1021/acs.jpcc.2c03208 .

Danilović, Danijela, Milosavljević, Aleksandar R., Sapkota, Pitambar, Dojčilović, Radovan, Tošić, Dragana, Vukmirović, Nenad, Jocić, Milan, Đoković, Vladimir, Ptasinska, Sylwia, Božanić, Dušan K., "Electronic Properties of Silver–Bismuth Iodide Rudorffite Nanoplatelets" in The Journal of Physical Chemistry C, 126, no. 32 (2022):13739-13747,
https://doi.org/10.1021/acs.jpcc.2c03208 . .

TY  - CONF
AU  - Božanić, Dušan K.
AU  - Danilović, Danijela
AU  - Milosavljević, R. M.
AU  - Sapkota, P.
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Vukmirović, N.
AU  - Ptasinska, S.
AU  - Đoković, Vladimir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10795
AB  - Silver-bismuth iodide (Ag-Bi-I) rudorffites are chemically stable and non-toxic materials that can act as a possible replacement for methylammonium lead halide perovskites in optoelectronic devices. In this report we will present innovative routes for fabrication of AgBi-I nanomaterials, as well as the results of the investigation of the electronic structure of isolated Ag-Bi-I nanoparticles by soft X-ray aerosol photoemission spectroscopy [1, 2]. Aerosol photoemission spectroscopy allows studies of the electronic structure of submicrometer particles that are free from the influence of a substrate or solvent [1-5]. In this approach the aerosol particles can be produced directly from a solution or a colloidal dispersion, which opens a possibility for investigation of a variety of nanosystems that can be produced by wet chemistry methods. This technique relies on the interaction of focused beam of isolated particles with ionizing radiation under high vacuum conditions. In addition, by using tunable synchrotron radiation as an excitation source it is possible to obtain highresolution photoelectron spectra in the investigated photoelectron energy range.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
T1  - Electronic structure of silver-bismuth iodide rudorffite nanomaterials studied by synchrotron radiation soft X-ray photoemission spectroscopy
SP  - 59
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10795
ER  - 

@conference{
author = "Božanić, Dušan K. and Danilović, Danijela and Milosavljević, R. M. and Sapkota, P. and Dojčilović, Radovan and Tošić, Dragana and Vukmirović, N. and Ptasinska, S. and Đoković, Vladimir",
year = "2022",
abstract = "Silver-bismuth iodide (Ag-Bi-I) rudorffites are chemically stable and non-toxic materials that can act as a possible replacement for methylammonium lead halide perovskites in optoelectronic devices. In this report we will present innovative routes for fabrication of AgBi-I nanomaterials, as well as the results of the investigation of the electronic structure of isolated Ag-Bi-I nanoparticles by soft X-ray aerosol photoemission spectroscopy [1, 2]. Aerosol photoemission spectroscopy allows studies of the electronic structure of submicrometer particles that are free from the influence of a substrate or solvent [1-5]. In this approach the aerosol particles can be produced directly from a solution or a colloidal dispersion, which opens a possibility for investigation of a variety of nanosystems that can be produced by wet chemistry methods. This technique relies on the interaction of focused beam of isolated particles with ionizing radiation under high vacuum conditions. In addition, by using tunable synchrotron radiation as an excitation source it is possible to obtain highresolution photoelectron spectra in the investigated photoelectron energy range.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade",
title = "Electronic structure of silver-bismuth iodide rudorffite nanomaterials studied by synchrotron radiation soft X-ray photoemission spectroscopy",
pages = "59-60",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10795"
}

Božanić, D. K., Danilović, D., Milosavljević, R. M., Sapkota, P., Dojčilović, R., Tošić, D., Vukmirović, N., Ptasinska, S.,& Đoković, V.. (2022). Electronic structure of silver-bismuth iodide rudorffite nanomaterials studied by synchrotron radiation soft X-ray photoemission spectroscopy. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade
Belgrade : Serbian Ceramic Society., 59-60.
https://hdl.handle.net/21.15107/rcub_vinar_10795

Božanić DK, Danilović D, Milosavljević RM, Sapkota P, Dojčilović R, Tošić D, Vukmirović N, Ptasinska S, Đoković V. Electronic structure of silver-bismuth iodide rudorffite nanomaterials studied by synchrotron radiation soft X-ray photoemission spectroscopy. in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade. 2022;:59-60.
https://hdl.handle.net/21.15107/rcub_vinar_10795 .

Božanić, Dušan K., Danilović, Danijela, Milosavljević, R. M., Sapkota, P., Dojčilović, Radovan, Tošić, Dragana, Vukmirović, N., Ptasinska, S., Đoković, Vladimir, "Electronic structure of silver-bismuth iodide rudorffite nanomaterials studied by synchrotron radiation soft X-ray photoemission spectroscopy" in Advanced Ceramics and Application : 10th Serbian Ceramic Society Conference : program and the book of abstracts; September 26-27, 2022; Belgrade (2022):59-60,
https://hdl.handle.net/21.15107/rcub_vinar_10795 .

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Dojčilović, Radovan
AU  - Pajović, Jelena D.
AU  - Tošić, Dragana
AU  - Dudić, Duško
AU  - Réfrégiers, Matthieu
AU  - Đoković, Vladimir
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10076
AB  - Fluorescent nanocomposite films were prepared by solution mixing of polyvinyl alcohol (PVA) and tryptophan functionalized silver (AgTrp) nanoparticles. Synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging was used to follow the distribution of AgTrp nanoparticles within the polymer matrix. Pronounced growth of dendrite-like structures in the presence of AgTrp nanoparticles was confirmed by bright field and fluorescence imaging as well as with atomic force microscopies. Both tryptophan and AgTrp nanoparticles influence thermal properties of the matrix. Differential scanning calorimetry measurements showed that they reduce crystallinity and significantly increase the glass transition temperature of PVA (in the case of PVA-AgTrp film the Tg increases by ~20 °C). Dielectric properties of the films were studied under two different conditions (dark and illumination). The illumination with 250 nm light induces a significant increase in conductance of the PVA-AgTrp nanocomposite. The relative changes, with respect to the conductance measured in the dark, were almost ~200%.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles
VL  - 634
SP  - 128050
DO  - 10.1016/j.colsurfa.2021.128050
ER  - 

@article{
author = "Božanić, Dušan K. and Dojčilović, Radovan and Pajović, Jelena D. and Tošić, Dragana and Dudić, Duško and Réfrégiers, Matthieu and Đoković, Vladimir",
year = "2022",
abstract = "Fluorescent nanocomposite films were prepared by solution mixing of polyvinyl alcohol (PVA) and tryptophan functionalized silver (AgTrp) nanoparticles. Synchrotron excitation deep-ultraviolet (DUV) fluorescence imaging was used to follow the distribution of AgTrp nanoparticles within the polymer matrix. Pronounced growth of dendrite-like structures in the presence of AgTrp nanoparticles was confirmed by bright field and fluorescence imaging as well as with atomic force microscopies. Both tryptophan and AgTrp nanoparticles influence thermal properties of the matrix. Differential scanning calorimetry measurements showed that they reduce crystallinity and significantly increase the glass transition temperature of PVA (in the case of PVA-AgTrp film the Tg increases by ~20 °C). Dielectric properties of the films were studied under two different conditions (dark and illumination). The illumination with 250 nm light induces a significant increase in conductance of the PVA-AgTrp nanocomposite. The relative changes, with respect to the conductance measured in the dark, were almost ~200%.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles",
volume = "634",
pages = "128050",
doi = "10.1016/j.colsurfa.2021.128050"
}

Božanić, D. K., Dojčilović, R., Pajović, J. D., Tošić, D., Dudić, D., Réfrégiers, M.,& Đoković, V.. (2022). Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 634, 128050.
https://doi.org/10.1016/j.colsurfa.2021.128050

Božanić DK, Dojčilović R, Pajović JD, Tošić D, Dudić D, Réfrégiers M, Đoković V. Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2022;634:128050.
doi:10.1016/j.colsurfa.2021.128050 .

Božanić, Dušan K., Dojčilović, Radovan, Pajović, Jelena D., Tošić, Dragana, Dudić, Duško, Réfrégiers, Matthieu, Đoković, Vladimir, "Fluorescence microscopy and photodielectric characterization studies of the composite films of polyvinyl alcohol and tryptophan functionalized silver nanoparticles" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 634 (2022):128050,
https://doi.org/10.1016/j.colsurfa.2021.128050 . .

TY  - JOUR
AU  - Trpkov, Đorđe
AU  - Vinić, Milica
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10347
AB  - Nitrogen-functionalized graphene quantum dots (N-GQDs) were synthesized by hydrothermal transformation of glycine precursors in glycerol. Functionalization of GQDs with nitrogen was confirmed with FTIR spectroscopy. Atomic force microscopy (AFM) analysis revealed that the thickness of the quantum dots is around similar to 1 nm while the lateral dimensions are in the range from 20 to 80 nm. N-GQDs exhibit strong fluorescence in the blue (420 nm) region and they are suitable for bioimaging applications.
T2  - Optical and Quantum Electronics
T1  - Fast, eco-friendly synthesis of blue luminescent nitrogen-doped graphene quantum dots in glycerol
VL  - 54
IS  - 6
SP  - 387
DO  - 10.1007/s11082-022-03754-0
ER  - 

@article{
author = "Trpkov, Đorđe and Vinić, Milica and Dojčilović, Radovan and Tošić, Dragana",
year = "2022",
abstract = "Nitrogen-functionalized graphene quantum dots (N-GQDs) were synthesized by hydrothermal transformation of glycine precursors in glycerol. Functionalization of GQDs with nitrogen was confirmed with FTIR spectroscopy. Atomic force microscopy (AFM) analysis revealed that the thickness of the quantum dots is around similar to 1 nm while the lateral dimensions are in the range from 20 to 80 nm. N-GQDs exhibit strong fluorescence in the blue (420 nm) region and they are suitable for bioimaging applications.",
journal = "Optical and Quantum Electronics",
title = "Fast, eco-friendly synthesis of blue luminescent nitrogen-doped graphene quantum dots in glycerol",
volume = "54",
number = "6",
pages = "387",
doi = "10.1007/s11082-022-03754-0"
}

Trpkov, Đ., Vinić, M., Dojčilović, R.,& Tošić, D.. (2022). Fast, eco-friendly synthesis of blue luminescent nitrogen-doped graphene quantum dots in glycerol. in Optical and Quantum Electronics, 54(6), 387.
https://doi.org/10.1007/s11082-022-03754-0

Trpkov Đ, Vinić M, Dojčilović R, Tošić D. Fast, eco-friendly synthesis of blue luminescent nitrogen-doped graphene quantum dots in glycerol. in Optical and Quantum Electronics. 2022;54(6):387.
doi:10.1007/s11082-022-03754-0 .

Trpkov, Đorđe, Vinić, Milica, Dojčilović, Radovan, Tošić, Dragana, "Fast, eco-friendly synthesis of blue luminescent nitrogen-doped graphene quantum dots in glycerol" in Optical and Quantum Electronics, 54, no. 6 (2022):387,
https://doi.org/10.1007/s11082-022-03754-0 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Tošić, Dragana
AU  - Dojčilović, Radovan
AU  - Dudić, Duško
AU  - Dramićanin, Miroslav
AU  - Medić, Mina M.
AU  - McPherson, Michael M.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9563
AB  - Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors
T2  - Polymer Testing
T1  - PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix
VL  - 96
SP  - 107093
DO  - 10.1016/j.polymertesting.2021.107093
ER  - 

@article{
author = "Pavlović, Vera P. and Tošić, Dragana and Dojčilović, Radovan and Dudić, Duško and Dramićanin, Miroslav and Medić, Mina M. and McPherson, Michael M. and Pavlović, Vladimir B. and Vlahović, Branislav and Đoković, Vladimir",
year = "2021",
abstract = "Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors",
journal = "Polymer Testing",
title = "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix",
volume = "96",
pages = "107093",
doi = "10.1016/j.polymertesting.2021.107093"
}

Pavlović, V. P., Tošić, D., Dojčilović, R., Dudić, D., Dramićanin, M., Medić, M. M., McPherson, M. M., Pavlović, V. B., Vlahović, B.,& Đoković, V.. (2021). PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing, 96, 107093.
https://doi.org/10.1016/j.polymertesting.2021.107093

Pavlović VP, Tošić D, Dojčilović R, Dudić D, Dramićanin M, Medić MM, McPherson MM, Pavlović VB, Vlahović B, Đoković V. PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing. 2021;96:107093.
doi:10.1016/j.polymertesting.2021.107093 .

Pavlović, Vera P., Tošić, Dragana, Dojčilović, Radovan, Dudić, Duško, Dramićanin, Miroslav, Medić, Mina M., McPherson, Michael M., Pavlović, Vladimir B., Vlahović, Branislav, Đoković, Vladimir, "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix" in Polymer Testing, 96 (2021):107093,
https://doi.org/10.1016/j.polymertesting.2021.107093 . .

TY  - CONF
AU  - Danilović, Danijela
AU  - Božanić, Dušan K.
AU  - Milosavljević, Aleksandar R.
AU  - Dojčilović, Radovan
AU  - Tošić, Dragana
AU  - Đoković, Vladimir
AU  - Sapkota, Pitambar
AU  - Ptasinska, Sylwia
AU  - Vukmirović, Nenad
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10902
AB  - Silver-bismuth-iodide (Ag-Bi-I) rudorffite hybrid materials havegained an immense interest in the research for a lead-free, chemically stable and low-cost absorber material in photovoltaic devices [1].These materials can be fabricated in the form of macroscopic crystals or as thin films,in which case they can be integrated into solar cells that show good photoconversion efficiency[2]. Fabricating AgBi-I in nanocrystal form couldfacilitate further their integration in the photovoltaic devices and enhance device performance due to size confinement effects. In our previous study, we successfully fabricated ligand-free Ag3BiI6nanoparticles in the form of aerosols [3]. Here, we report on thefabricationprocedure of 2D Ag-Bi-I nanomaterials in the colloidal form. The results of the structural and morphological investigation of the nanosheets will be presented, as well as reconstruction of the electronic levels of the Ag3BiI6nanoparticles from the combined UV-vis absorption andX-ray photoelectron spectroscopy data.In addition, an analysis that shows the relation between the positions of the bands in the Ag3BiI6nanosheet absorption spectra and the thickness of the nanosheet will be discussed.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
T1  - 2D silver-bismuth-iodide rudorffitenanomaterials for photovoltaic devices: a novel route for chemical synthesis of Ag3BiI6nanosheets
SP  - 76
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10902
ER  - 

@conference{
author = "Danilović, Danijela and Božanić, Dušan K. and Milosavljević, Aleksandar R. and Dojčilović, Radovan and Tošić, Dragana and Đoković, Vladimir and Sapkota, Pitambar and Ptasinska, Sylwia and Vukmirović, Nenad",
year = "2021",
abstract = "Silver-bismuth-iodide (Ag-Bi-I) rudorffite hybrid materials havegained an immense interest in the research for a lead-free, chemically stable and low-cost absorber material in photovoltaic devices [1].These materials can be fabricated in the form of macroscopic crystals or as thin films,in which case they can be integrated into solar cells that show good photoconversion efficiency[2]. Fabricating AgBi-I in nanocrystal form couldfacilitate further their integration in the photovoltaic devices and enhance device performance due to size confinement effects. In our previous study, we successfully fabricated ligand-free Ag3BiI6nanoparticles in the form of aerosols [3]. Here, we report on thefabricationprocedure of 2D Ag-Bi-I nanomaterials in the colloidal form. The results of the structural and morphological investigation of the nanosheets will be presented, as well as reconstruction of the electronic levels of the Ag3BiI6nanoparticles from the combined UV-vis absorption andX-ray photoelectron spectroscopy data.In addition, an analysis that shows the relation between the positions of the bands in the Ag3BiI6nanosheet absorption spectra and the thickness of the nanosheet will be discussed.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade",
title = "2D silver-bismuth-iodide rudorffitenanomaterials for photovoltaic devices: a novel route for chemical synthesis of Ag3BiI6nanosheets",
pages = "76",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10902"
}

Danilović, D., Božanić, D. K., Milosavljević, A. R., Dojčilović, R., Tošić, D., Đoković, V., Sapkota, P., Ptasinska, S.,& Vukmirović, N.. (2021). 2D silver-bismuth-iodide rudorffitenanomaterials for photovoltaic devices: a novel route for chemical synthesis of Ag3BiI6nanosheets. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
Belgrade : Institute of Physics Belgrade., 76.
https://hdl.handle.net/21.15107/rcub_vinar_10902

Danilović D, Božanić DK, Milosavljević AR, Dojčilović R, Tošić D, Đoković V, Sapkota P, Ptasinska S, Vukmirović N. 2D silver-bismuth-iodide rudorffitenanomaterials for photovoltaic devices: a novel route for chemical synthesis of Ag3BiI6nanosheets. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade. 2021;:76.
https://hdl.handle.net/21.15107/rcub_vinar_10902 .

Danilović, Danijela, Božanić, Dušan K., Milosavljević, Aleksandar R., Dojčilović, Radovan, Tošić, Dragana, Đoković, Vladimir, Sapkota, Pitambar, Ptasinska, Sylwia, Vukmirović, Nenad, "2D silver-bismuth-iodide rudorffitenanomaterials for photovoltaic devices: a novel route for chemical synthesis of Ag3BiI6nanosheets" in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade (2021):76,
https://hdl.handle.net/21.15107/rcub_vinar_10902 .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica V.
AU  - Pavlović, Vladimir B.
AU  - Tošić, Dragana
AU  - Milenković, Marina
AU  - Todorović-Marković, Biljana
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7611
AB  - © 2018 Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.
T2  - Materials Chemistry and Physics
T1  - Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study
VL  - 213
SP  - 157
EP  - 167
DO  - 10.1016/j.matchemphys.2018.04.011
ER  - 

@article{
author = "Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica V. and Pavlović, Vladimir B. and Tošić, Dragana and Milenković, Marina and Todorović-Marković, Biljana",
year = "2018",
abstract = "© 2018 Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.",
journal = "Materials Chemistry and Physics",
title = "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study",
volume = "213",
pages = "157-167",
doi = "10.1016/j.matchemphys.2018.04.011"
}

Jovanović, S. P., Holclajtner-Antunović, I. D., Uskoković-Marković, S., Bajuk-Bogdanović, D. V., Pavlović, V. B., Tošić, D., Milenković, M.,& Todorović-Marković, B.. (2018). Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics, 213, 157-167.
https://doi.org/10.1016/j.matchemphys.2018.04.011

Jovanović SP, Holclajtner-Antunović ID, Uskoković-Marković S, Bajuk-Bogdanović DV, Pavlović VB, Tošić D, Milenković M, Todorović-Marković B. Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics. 2018;213:157-167.
doi:10.1016/j.matchemphys.2018.04.011 .

Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica V., Pavlović, Vladimir B., Tošić, Dragana, Milenković, Marina, Todorović-Marković, Biljana, "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study" in Materials Chemistry and Physics, 213 (2018):157-167,
https://doi.org/10.1016/j.matchemphys.2018.04.011 . .

TY  - JOUR
AU  - Tošić, Dragana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Prekodravac, Jovana
AU  - Budimir, Milica
AU  - Kepić, Dejan P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1157
AB  - In this paper, we present a novel method for graphene nanoribbons formation using nickel nanowires as templates. Modification of electrochemical procedure for nickel nanowires synthesis was introduced by implementing graphene quantum dots as a carbon source. Thus, nickel nanowires with graphene quantum dots were prepared. These wires were exposed to rapid thermal annealing at high temperatures (500 degrees C, 700 degrees C and 800 degrees C). During this process carbon atoms dissolve in metal and precipitate to the nickel surface forming nickel-carbon nanowires. Atomic force microscopy, scanning electron microscopy and Raman spectroscopy were characterization methods used for analysis of changes in nickel-carbon nanowires properties depending on the different annealing temperatures. After etching nickel with nitric acid, graphene nanoribbons with average diameters of 32 nm and average lengths of 4 mu m were obtained. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Synthetic Metals
T1  - Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation
VL  - 218
SP  - 43
EP  - 49
DO  - 10.1016/j.synthmet.2016.04.016
ER  - 

@article{
author = "Tošić, Dragana and Marković, Zoran M. and Jovanović, Svetlana P. and Prekodravac, Jovana and Budimir, Milica and Kepić, Dejan P. and Holclajtner-Antunović, Ivanka D. and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2016",
abstract = "In this paper, we present a novel method for graphene nanoribbons formation using nickel nanowires as templates. Modification of electrochemical procedure for nickel nanowires synthesis was introduced by implementing graphene quantum dots as a carbon source. Thus, nickel nanowires with graphene quantum dots were prepared. These wires were exposed to rapid thermal annealing at high temperatures (500 degrees C, 700 degrees C and 800 degrees C). During this process carbon atoms dissolve in metal and precipitate to the nickel surface forming nickel-carbon nanowires. Atomic force microscopy, scanning electron microscopy and Raman spectroscopy were characterization methods used for analysis of changes in nickel-carbon nanowires properties depending on the different annealing temperatures. After etching nickel with nitric acid, graphene nanoribbons with average diameters of 32 nm and average lengths of 4 mu m were obtained. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Synthetic Metals",
title = "Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation",
volume = "218",
pages = "43-49",
doi = "10.1016/j.synthmet.2016.04.016"
}

Tošić, D., Marković, Z. M., Jovanović, S. P., Prekodravac, J., Budimir, M., Kepić, D. P., Holclajtner-Antunović, I. D., Dramićanin, M.,& Todorović-Marković, B.. (2016). Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation. in Synthetic Metals, 218, 43-49.
https://doi.org/10.1016/j.synthmet.2016.04.016

Tošić D, Marković ZM, Jovanović SP, Prekodravac J, Budimir M, Kepić DP, Holclajtner-Antunović ID, Dramićanin M, Todorović-Marković B. Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation. in Synthetic Metals. 2016;218:43-49.
doi:10.1016/j.synthmet.2016.04.016 .

Tošić, Dragana, Marković, Zoran M., Jovanović, Svetlana P., Prekodravac, Jovana, Budimir, Milica, Kepić, Dejan P., Holclajtner-Antunović, Ivanka D., Dramićanin, Miroslav, Todorović-Marković, Biljana, "Rapid thermal annealing of nickel-carbon nanowires for graphene nanoribbons formation" in Synthetic Metals, 218 (2016):43-49,
https://doi.org/10.1016/j.synthmet.2016.04.016 . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Prekodravac, Jovana
AU  - Tošić, Dragana
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Milosavljević, Momir
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/412
AB  - In this paper, a facile synthesis of water-soluble curcumin nanocrystals is reported. Solvent exchange method was applied to synthesize curcumin nanocrystals. Different techniques were used to characterize the structural and photophysical properties of the curcumin nanocrystals. It was found that the nanocurcumin prepared by this method had good chemical and physical stability, could be stored in the powder form at room temperature, and was freely dispersible in water. It was established that the size of curcumin nanocrystals varied in the range of 20-500 nm. Fourier transform infrared spectroscopy and UV-Vis analyses showed the presence of tetrahydrofuran inside the curcumin nanocrystals. Furthermore, it was found that the nanocurcumin emitted photoluminescence with a yellow green color.
T2  - Journal of the Serbian Chemical Society
T1  - Facile synthesis of water-soluble curcumin nanocrystals
VL  - 80
IS  - 1
SP  - 63
EP  - 72
DO  - 10.2298/JSC140819117M
ER  - 

@article{
author = "Marković, Zoran M. and Prekodravac, Jovana and Tošić, Dragana and Holclajtner-Antunović, Ivanka D. and Milosavljević, Momir and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2015",
abstract = "In this paper, a facile synthesis of water-soluble curcumin nanocrystals is reported. Solvent exchange method was applied to synthesize curcumin nanocrystals. Different techniques were used to characterize the structural and photophysical properties of the curcumin nanocrystals. It was found that the nanocurcumin prepared by this method had good chemical and physical stability, could be stored in the powder form at room temperature, and was freely dispersible in water. It was established that the size of curcumin nanocrystals varied in the range of 20-500 nm. Fourier transform infrared spectroscopy and UV-Vis analyses showed the presence of tetrahydrofuran inside the curcumin nanocrystals. Furthermore, it was found that the nanocurcumin emitted photoluminescence with a yellow green color.",
journal = "Journal of the Serbian Chemical Society",
title = "Facile synthesis of water-soluble curcumin nanocrystals",
volume = "80",
number = "1",
pages = "63-72",
doi = "10.2298/JSC140819117M"
}

Marković, Z. M., Prekodravac, J., Tošić, D., Holclajtner-Antunović, I. D., Milosavljević, M., Dramićanin, M.,& Todorović-Marković, B.. (2015). Facile synthesis of water-soluble curcumin nanocrystals. in Journal of the Serbian Chemical Society, 80(1), 63-72.
https://doi.org/10.2298/JSC140819117M

Marković ZM, Prekodravac J, Tošić D, Holclajtner-Antunović ID, Milosavljević M, Dramićanin M, Todorović-Marković B. Facile synthesis of water-soluble curcumin nanocrystals. in Journal of the Serbian Chemical Society. 2015;80(1):63-72.
doi:10.2298/JSC140819117M .

Marković, Zoran M., Prekodravac, Jovana, Tošić, Dragana, Holclajtner-Antunović, Ivanka D., Milosavljević, Momir, Dramićanin, Miroslav, Todorović-Marković, Biljana, "Facile synthesis of water-soluble curcumin nanocrystals" in Journal of the Serbian Chemical Society, 80, no. 1 (2015):63-72,
https://doi.org/10.2298/JSC140819117M . .

TY  - JOUR
AU  - Prekodravac, Jovana
AU  - Jovanović, Svetlana P.
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Peruško, Davor
AU  - Pavlović, Vladimir B.
AU  - Tošić, Dragana
AU  - Todorović-Marković, Biljana
AU  - Marković, Zoran M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7063
AB  - In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.
T2  - Physica Scripta
T1  - Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014030
ER  - 

@article{
author = "Prekodravac, Jovana and Jovanović, Svetlana P. and Holclajtner-Antunović, Ivanka D. and Peruško, Davor and Pavlović, Vladimir B. and Tošić, Dragana and Todorović-Marković, Biljana and Marković, Zoran M.",
year = "2014",
abstract = "In this paper we present synthesis of monolayer graphene islands. These films are deposited through nickel catalyzed transformation of fullerol and graphene quantum dots. Carbon doped nickel films are produced by autocatalytic chemical deposition. Upon rapid thermal annealing, graphene films are formed. Different characterization techniques are applied: Raman spectroscopy, scanning electron and atomic force microscopy. Raman spectroscopy analysis confirmed the formation of monolayer graphene films. Microscopy analysis revealed formation of monolayer islands.",
journal = "Physica Scripta",
title = "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014030"
}

Prekodravac, J., Jovanović, S. P., Holclajtner-Antunović, I. D., Peruško, D., Pavlović, V. B., Tošić, D., Todorović-Marković, B.,& Marković, Z. M.. (2014). Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014030

Prekodravac J, Jovanović SP, Holclajtner-Antunović ID, Peruško D, Pavlović VB, Tošić D, Todorović-Marković B, Marković ZM. Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014030 .

Prekodravac, Jovana, Jovanović, Svetlana P., Holclajtner-Antunović, Ivanka D., Peruško, Davor, Pavlović, Vladimir B., Tošić, Dragana, Todorović-Marković, Biljana, Marković, Zoran M., "Monolayer graphene films through nickel catalyzed transformation of fullerol and graphene quantum dots: a Raman spectroscopy study" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014030 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Da Ross, T.
AU  - Ostric, A.
AU  - Tošić, Dragana
AU  - Prekodravac, Jovana
AU  - Marković, Zoran M.
AU  - Todorović-Marković, Biljana
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7060
AB  - Graphene nanoribbons (GNRs) were synthesized by longitudinal unzipping of multiwall carbon nanotubes (MWCNTs), and changes in Raman spectra were followed. Transmission electron microscopy was used to investigate the longitudinal opening of carbon nanotubes. Height and height profiles of GNRs are observed by atomic force microscopy. Considering that GNRs are carbon-based material, we conducted a detailed Raman spectroscopy study of this new material. Raman measurements were performed at three different laser excitational lines: 532, 633 and 785 nm. We noticed a considerable increase in the ratio between D and G bands compared to the same parameter for MWCNTs. The contribution of the edge structure is much higher in GNRs than in the structure of pristine MWCNTs, which is a main reason for the high increase in structural disorder. It was also noticed that the intensity of the 2D band was significantly lower compared to the same band in the Raman spectra of pristine MWCNTs.
T2  - Physica Scripta
T1  - Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014023
ER  - 

@article{
author = "Jovanović, Svetlana P. and Da Ross, T. and Ostric, A. and Tošić, Dragana and Prekodravac, Jovana and Marković, Zoran M. and Todorović-Marković, Biljana",
year = "2014",
abstract = "Graphene nanoribbons (GNRs) were synthesized by longitudinal unzipping of multiwall carbon nanotubes (MWCNTs), and changes in Raman spectra were followed. Transmission electron microscopy was used to investigate the longitudinal opening of carbon nanotubes. Height and height profiles of GNRs are observed by atomic force microscopy. Considering that GNRs are carbon-based material, we conducted a detailed Raman spectroscopy study of this new material. Raman measurements were performed at three different laser excitational lines: 532, 633 and 785 nm. We noticed a considerable increase in the ratio between D and G bands compared to the same parameter for MWCNTs. The contribution of the edge structure is much higher in GNRs than in the structure of pristine MWCNTs, which is a main reason for the high increase in structural disorder. It was also noticed that the intensity of the 2D band was significantly lower compared to the same band in the Raman spectra of pristine MWCNTs.",
journal = "Physica Scripta",
title = "Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014023"
}

Jovanović, S. P., Da Ross, T., Ostric, A., Tošić, D., Prekodravac, J., Marković, Z. M.,& Todorović-Marković, B.. (2014). Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014023

Jovanović SP, Da Ross T, Ostric A, Tošić D, Prekodravac J, Marković ZM, Todorović-Marković B. Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014023 .

Jovanović, Svetlana P., Da Ross, T., Ostric, A., Tošić, Dragana, Prekodravac, Jovana, Marković, Zoran M., Todorović-Marković, Biljana, "Raman spectroscopy of graphene nanoribbons synthesized by longitudinal unzipping of multiwall carbon nanotubes" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014023 . .

TY  - JOUR
AU  - Kepić, Dejan P.
AU  - Marković, Zoran M.
AU  - Tošić, Dragana
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Adnađević, Borivoj
AU  - Prekodravac, Jovana
AU  - Kleut, Duška
AU  - Dramićanin, Miroslav
AU  - Todorović-Marković, Biljana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7022
AB  - In this work, we present the results of a Raman spectroscopy study of single-wall carbon nanotube (SWCNT) thin films treated with microwave irradiation. SWCNT thin films were deposited by the vacuum filtration method and transferred onto alumina substrate. These thin films were exposed to microwave irradiation of 25 and 250 W at 2.45 GHz. All samples were characterized by Raman spectroscopy and atomic force microscopy. Raman spectroscopy analysis showed that there was neither selective destruction of metallic nor semiconducting nanotubes. It was noticed that samples were heated only during microwave irradiation at 250 W. The major effect of microwave irradiation on SWCNTs was their debundling.
T2  - Physica Scripta
T1  - Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study
VL  - T157
DO  - 10.1088/0031-8949/2013/T157/014040
ER  - 

@article{
author = "Kepić, Dejan P. and Marković, Zoran M. and Tošić, Dragana and Holclajtner-Antunović, Ivanka D. and Adnađević, Borivoj and Prekodravac, Jovana and Kleut, Duška and Dramićanin, Miroslav and Todorović-Marković, Biljana",
year = "2013",
abstract = "In this work, we present the results of a Raman spectroscopy study of single-wall carbon nanotube (SWCNT) thin films treated with microwave irradiation. SWCNT thin films were deposited by the vacuum filtration method and transferred onto alumina substrate. These thin films were exposed to microwave irradiation of 25 and 250 W at 2.45 GHz. All samples were characterized by Raman spectroscopy and atomic force microscopy. Raman spectroscopy analysis showed that there was neither selective destruction of metallic nor semiconducting nanotubes. It was noticed that samples were heated only during microwave irradiation at 250 W. The major effect of microwave irradiation on SWCNTs was their debundling.",
journal = "Physica Scripta",
title = "Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study",
volume = "T157",
doi = "10.1088/0031-8949/2013/T157/014040"
}

Kepić, D. P., Marković, Z. M., Tošić, D., Holclajtner-Antunović, I. D., Adnađević, B., Prekodravac, J., Kleut, D., Dramićanin, M.,& Todorović-Marković, B.. (2013). Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study. in Physica Scripta, T157.
https://doi.org/10.1088/0031-8949/2013/T157/014040

Kepić DP, Marković ZM, Tošić D, Holclajtner-Antunović ID, Adnađević B, Prekodravac J, Kleut D, Dramićanin M, Todorović-Marković B. Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study. in Physica Scripta. 2013;T157.
doi:10.1088/0031-8949/2013/T157/014040 .

Kepić, Dejan P., Marković, Zoran M., Tošić, Dragana, Holclajtner-Antunović, Ivanka D., Adnađević, Borivoj, Prekodravac, Jovana, Kleut, Duška, Dramićanin, Miroslav, Todorović-Marković, Biljana, "Surface modification of single-wall carbon nanotube thin films irradiated by microwaves: a Raman spectroscopy study" in Physica Scripta, T157 (2013),
https://doi.org/10.1088/0031-8949/2013/T157/014040 . .

TY  - JOUR
AU  - Tošić, Dragana
AU  - Marković, Zoran M.
AU  - Jovanović, Svetlana P.
AU  - Milosavljević, Momir
AU  - Todorović-Marković, Biljana
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5427
AB  - Graphene nanoribbons (GNRs) are thin strips of graphene that have captured the interest of scientists due to their unique structure and promising applications in electronics. This paper presents the results of a comparative analysis of morphological properties of graphene nanoribbons synthesized by different methods. Various methods have been reported for graphene nanoribons synthesis. Lithography methods usually include electron-beam (e-beam) lithography, atomic force microscopy (AFM) lithography, and scanning tunnelling microscopy (STM) lithography. Sonochemical and chemical methods exist as well, namely chemical vapour deposition (CVD) and anisotropic etching. Graphene nanoribbons can also be fabricated from unzipping carbon nanotubes (CNTs). We propose a new highly efficient method for graphene nanoribbons production by gamma irradiation of graphene dispersed in cyclopentanone (CPO). Surface morphology of graphene nanoribbons was visualized with atomic force and transmission electron microscopy. It was determined that dimensions of graphene nanoribbons are inversely proportional to applied gamma irradiation dose. It was established that the narrowest nanoribbons were 10-20 nm wide and 1 nm high with regular and smooth edges. In comparison to other synthesis methods, dimensions of graphene nanoribbons synthesized by gamma irradiation are slightly larger, but the yield of nanoribbons is much higher. Fourier transform infrared spectroscopy was used for structural analysis of graphene nanoribbons. Results of photoluminescence spectroscopy revealed for the first time that synthesized nanoribbons showed photoluminescence in the blue region of visible light in contrast to graphene nanoribbons synthesized by other methods. Based on disclosed facts, we believe that our synthesis method has good prospects for potential future mass production of graphene nanoribbons with uniform size, as well as for future investigations of carbon nanomaterials for applications in optoelectronics and biological labeling.
T2  - Hemijska industrija
T1  - Comparative Analysis of Different Methods for Graphene Nanoribbon Synthesis
VL  - 67
IS  - 1
SP  - 147
EP  - 156
DO  - 10.2298/HEMIND120403056T
ER  - 

@article{
author = "Tošić, Dragana and Marković, Zoran M. and Jovanović, Svetlana P. and Milosavljević, Momir and Todorović-Marković, Biljana",
year = "2013",
abstract = "Graphene nanoribbons (GNRs) are thin strips of graphene that have captured the interest of scientists due to their unique structure and promising applications in electronics. This paper presents the results of a comparative analysis of morphological properties of graphene nanoribbons synthesized by different methods. Various methods have been reported for graphene nanoribons synthesis. Lithography methods usually include electron-beam (e-beam) lithography, atomic force microscopy (AFM) lithography, and scanning tunnelling microscopy (STM) lithography. Sonochemical and chemical methods exist as well, namely chemical vapour deposition (CVD) and anisotropic etching. Graphene nanoribbons can also be fabricated from unzipping carbon nanotubes (CNTs). We propose a new highly efficient method for graphene nanoribbons production by gamma irradiation of graphene dispersed in cyclopentanone (CPO). Surface morphology of graphene nanoribbons was visualized with atomic force and transmission electron microscopy. It was determined that dimensions of graphene nanoribbons are inversely proportional to applied gamma irradiation dose. It was established that the narrowest nanoribbons were 10-20 nm wide and 1 nm high with regular and smooth edges. In comparison to other synthesis methods, dimensions of graphene nanoribbons synthesized by gamma irradiation are slightly larger, but the yield of nanoribbons is much higher. Fourier transform infrared spectroscopy was used for structural analysis of graphene nanoribbons. Results of photoluminescence spectroscopy revealed for the first time that synthesized nanoribbons showed photoluminescence in the blue region of visible light in contrast to graphene nanoribbons synthesized by other methods. Based on disclosed facts, we believe that our synthesis method has good prospects for potential future mass production of graphene nanoribbons with uniform size, as well as for future investigations of carbon nanomaterials for applications in optoelectronics and biological labeling.",
journal = "Hemijska industrija",
title = "Comparative Analysis of Different Methods for Graphene Nanoribbon Synthesis",
volume = "67",
number = "1",
pages = "147-156",
doi = "10.2298/HEMIND120403056T"
}

Tošić, D., Marković, Z. M., Jovanović, S. P., Milosavljević, M.,& Todorović-Marković, B.. (2013). Comparative Analysis of Different Methods for Graphene Nanoribbon Synthesis. in Hemijska industrija, 67(1), 147-156.
https://doi.org/10.2298/HEMIND120403056T

Tošić D, Marković ZM, Jovanović SP, Milosavljević M, Todorović-Marković B. Comparative Analysis of Different Methods for Graphene Nanoribbon Synthesis. in Hemijska industrija. 2013;67(1):147-156.
doi:10.2298/HEMIND120403056T .

Tošić, Dragana, Marković, Zoran M., Jovanović, Svetlana P., Milosavljević, Momir, Todorović-Marković, Biljana, "Comparative Analysis of Different Methods for Graphene Nanoribbon Synthesis" in Hemijska industrija, 67, no. 1 (2013):147-156,
https://doi.org/10.2298/HEMIND120403056T . .

TY  - JOUR
AU  - Kleut, Duška
AU  - Jovanović, Svetlana P.
AU  - Marković, Zoran M.
AU  - Kepić, Dejan P.
AU  - Tošić, Dragana
AU  - Romčević, Nebojša Ž.
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Pavlović, Vladimir B.
AU  - Dražić, Goran
AU  - Milosavljević, Momir
AU  - Todorović-Marković, Biljana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5047
AB  - A systematic study of the gamma irradiation effects on single wall carbon nanotube (SWCNT) structure was conducted. Nanotubes were exposed to different doses of gamma irradiation in three media. Irradiation was carried out in air, water and aqueous ammonia. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and Raman spectroscopy confirmed the changes in the SWCNT structure. TGA measurements showed the highest percentage of introduced groups for the SWCNTs irradiated with 100 kGy. FTIR spectroscopy provided evidence for the attachment of hydroxyl, carboxyl and nitrile functional groups to the SWCNT sidewalls. Those groups were confirmed by EA. All irradiated SWCNTs had hydroxyl and carboxyl groups irrelevant to media used for irradiation, but nitrile functional groups were only identified in SWCNTs irradiated in aqueous ammonia. Raman spectroscopy indicated that the degree of disorder in the carbon nanotube structure correlates with the irradiation dose. For the nanotubes irradiated with the dose of 100 kGy, the Raman I-D/I-G ratio was three times higher than for the pristine ones. Atomic force microscopy showed a 50% decrease in nanotube length at a radiation dose of 100 kGy. Scanning and transmission electron microscopies showed significant changes in the morphology and structure of gamma irradiated SWCNTs. (C) 2012 Elsevier Inc. All rights reserved.
T2  - Materials Characterization
T1  - Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose
VL  - 72
SP  - 37
EP  - 45
DO  - 10.1016/j.matchar.2012.07.002
ER  - 

@article{
author = "Kleut, Duška and Jovanović, Svetlana P. and Marković, Zoran M. and Kepić, Dejan P. and Tošić, Dragana and Romčević, Nebojša Ž. and Marinović-Cincović, Milena and Dramićanin, Miroslav and Holclajtner-Antunović, Ivanka D. and Pavlović, Vladimir B. and Dražić, Goran and Milosavljević, Momir and Todorović-Marković, Biljana",
year = "2012",
abstract = "A systematic study of the gamma irradiation effects on single wall carbon nanotube (SWCNT) structure was conducted. Nanotubes were exposed to different doses of gamma irradiation in three media. Irradiation was carried out in air, water and aqueous ammonia. Thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and Raman spectroscopy confirmed the changes in the SWCNT structure. TGA measurements showed the highest percentage of introduced groups for the SWCNTs irradiated with 100 kGy. FTIR spectroscopy provided evidence for the attachment of hydroxyl, carboxyl and nitrile functional groups to the SWCNT sidewalls. Those groups were confirmed by EA. All irradiated SWCNTs had hydroxyl and carboxyl groups irrelevant to media used for irradiation, but nitrile functional groups were only identified in SWCNTs irradiated in aqueous ammonia. Raman spectroscopy indicated that the degree of disorder in the carbon nanotube structure correlates with the irradiation dose. For the nanotubes irradiated with the dose of 100 kGy, the Raman I-D/I-G ratio was three times higher than for the pristine ones. Atomic force microscopy showed a 50% decrease in nanotube length at a radiation dose of 100 kGy. Scanning and transmission electron microscopies showed significant changes in the morphology and structure of gamma irradiated SWCNTs. (C) 2012 Elsevier Inc. All rights reserved.",
journal = "Materials Characterization",
title = "Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose",
volume = "72",
pages = "37-45",
doi = "10.1016/j.matchar.2012.07.002"
}

Kleut, D., Jovanović, S. P., Marković, Z. M., Kepić, D. P., Tošić, D., Romčević, N. Ž., Marinović-Cincović, M., Dramićanin, M., Holclajtner-Antunović, I. D., Pavlović, V. B., Dražić, G., Milosavljević, M.,& Todorović-Marković, B.. (2012). Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose. in Materials Characterization, 72, 37-45.
https://doi.org/10.1016/j.matchar.2012.07.002

Kleut D, Jovanović SP, Marković ZM, Kepić DP, Tošić D, Romčević NŽ, Marinović-Cincović M, Dramićanin M, Holclajtner-Antunović ID, Pavlović VB, Dražić G, Milosavljević M, Todorović-Marković B. Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose. in Materials Characterization. 2012;72:37-45.
doi:10.1016/j.matchar.2012.07.002 .

Kleut, Duška, Jovanović, Svetlana P., Marković, Zoran M., Kepić, Dejan P., Tošić, Dragana, Romčević, Nebojša Ž., Marinović-Cincović, Milena, Dramićanin, Miroslav, Holclajtner-Antunović, Ivanka D., Pavlović, Vladimir B., Dražić, Goran, Milosavljević, Momir, Todorović-Marković, Biljana, "Comparison of structural properties of pristine and gamma irradiated single-wall carbon nanotubes: Effects of medium and irradiation dose" in Materials Characterization, 72 (2012):37-45,
https://doi.org/10.1016/j.matchar.2012.07.002 . .

TY  - JOUR
AU  - Tošić, Dragana
AU  - Marković, Zoran M.
AU  - Dramićanin, Miroslav
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Jovanović, Svetlana P.
AU  - Milosavljević, Momir
AU  - Pantić, Jelena R.
AU  - Todorović-Marković, Biljana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4916
AB  - In this paper, facile low cost method for production of oligographene nanoribbons is presented. Nanoribbons are produced by gamma ray assisted cutting of oligographene dispersed in cyclopentanone. Width and height of the smallest nanoribbons are 30 and 1 nm, respectively. Due to the presence of a small number of defects introduced by gamma irradiation, nanoribbons are photoluminescent in the UV and blue region of the visible spectrum. (c) 2012 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Gamma ray assisted fabrication of fluorescent oligographene nanoribbons
VL  - 47
IS  - 8
SP  - 1996
EP  - 2000
DO  - 10.1016/j.materresbull.2012.04.012
ER  - 

@article{
author = "Tošić, Dragana and Marković, Zoran M. and Dramićanin, Miroslav and Holclajtner-Antunović, Ivanka D. and Jovanović, Svetlana P. and Milosavljević, Momir and Pantić, Jelena R. and Todorović-Marković, Biljana",
year = "2012",
abstract = "In this paper, facile low cost method for production of oligographene nanoribbons is presented. Nanoribbons are produced by gamma ray assisted cutting of oligographene dispersed in cyclopentanone. Width and height of the smallest nanoribbons are 30 and 1 nm, respectively. Due to the presence of a small number of defects introduced by gamma irradiation, nanoribbons are photoluminescent in the UV and blue region of the visible spectrum. (c) 2012 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Gamma ray assisted fabrication of fluorescent oligographene nanoribbons",
volume = "47",
number = "8",
pages = "1996-2000",
doi = "10.1016/j.materresbull.2012.04.012"
}

Tošić, D., Marković, Z. M., Dramićanin, M., Holclajtner-Antunović, I. D., Jovanović, S. P., Milosavljević, M., Pantić, J. R.,& Todorović-Marković, B.. (2012). Gamma ray assisted fabrication of fluorescent oligographene nanoribbons. in Materials Research Bulletin, 47(8), 1996-2000.
https://doi.org/10.1016/j.materresbull.2012.04.012

Tošić D, Marković ZM, Dramićanin M, Holclajtner-Antunović ID, Jovanović SP, Milosavljević M, Pantić JR, Todorović-Marković B. Gamma ray assisted fabrication of fluorescent oligographene nanoribbons. in Materials Research Bulletin. 2012;47(8):1996-2000.
doi:10.1016/j.materresbull.2012.04.012 .

Tošić, Dragana, Marković, Zoran M., Dramićanin, Miroslav, Holclajtner-Antunović, Ivanka D., Jovanović, Svetlana P., Milosavljević, Momir, Pantić, Jelena R., Todorović-Marković, Biljana, "Gamma ray assisted fabrication of fluorescent oligographene nanoribbons" in Materials Research Bulletin, 47, no. 8 (2012):1996-2000,
https://doi.org/10.1016/j.materresbull.2012.04.012 . .

TY  - JOUR
AU  - Jovanović, Svetlana P.
AU  - Marković, Zoran M.
AU  - Kleut, Duška
AU  - Tošić, Dragana
AU  - Kepić, Dejan P.
AU  - Marinović-Cincović, Milena
AU  - Holclajtner-Antunović, Ivanka D.
AU  - Todorović-Marković, Biljana
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4677
AB  - Single wall carbon nanotubes (SWCNTs) were exposed to gamma radiation, absorbing the doses of 25, 50 and 100 kGy in aqueous environment. After the irradiation treatment, the changes in the structure were studied using Fourier transform Infrared and Raman spectroscopy, thermogravimetric analysis and atomic force microscopy. Fourier Transform Infrared Spectroscopy has shown that the irradiation of SWCNTs in aqueous environment leads to covalent functionalization of SWCNTs. The irradiation of water leads to its radiolysis and the formation of free radical species of different types. These species react with nanotube sidewalls and in such way carboxylic and hydroxylic groups are covalently bonded to the sidewalls of SWCNTs. Thermogravimetric analysis was used to estimate the total amount of covalently bonded groups. The highest ratio of covalently bonded groups appears in nanotubes irradiated with the 100 kGy dose. Raman spectroscopy proved that the increase in irradiation doses leads to an increase of structural disorder of SWCNTs, presumably in the form of defects in carbon nanotube walls. Examination of I-D to I-G ratio shows a three times larger degree of structural disorder after the irradiation treatment with 100 kGy. The analysis of carbon nanotube Raman spectra RBM bands determined the presence of both semiconducting and metallic carbon nanotubes after gamma irradiation treatment. These measurements prove that gamma irradiation treatments have a nonselective effect regarding different chirality and therefore conductance of nanotubes. Atomic force microscopy shows a significant carbon nanotube shortening as the effect of gamma radiation treatment. Nanotubes with length between 500 nm and 1 mu m are predominant.
T2  - Hemijska industrija
T1  - Covalent Modification of Single Wall Carbon Nanotubes Upon Gamma Irradiation in Aqueous Media
VL  - 65
IS  - 5
SP  - 479
EP  - 487
DO  - 10.2298/HEMIND110531050J
ER  - 

@article{
author = "Jovanović, Svetlana P. and Marković, Zoran M. and Kleut, Duška and Tošić, Dragana and Kepić, Dejan P. and Marinović-Cincović, Milena and Holclajtner-Antunović, Ivanka D. and Todorović-Marković, Biljana",
year = "2011",
abstract = "Single wall carbon nanotubes (SWCNTs) were exposed to gamma radiation, absorbing the doses of 25, 50 and 100 kGy in aqueous environment. After the irradiation treatment, the changes in the structure were studied using Fourier transform Infrared and Raman spectroscopy, thermogravimetric analysis and atomic force microscopy. Fourier Transform Infrared Spectroscopy has shown that the irradiation of SWCNTs in aqueous environment leads to covalent functionalization of SWCNTs. The irradiation of water leads to its radiolysis and the formation of free radical species of different types. These species react with nanotube sidewalls and in such way carboxylic and hydroxylic groups are covalently bonded to the sidewalls of SWCNTs. Thermogravimetric analysis was used to estimate the total amount of covalently bonded groups. The highest ratio of covalently bonded groups appears in nanotubes irradiated with the 100 kGy dose. Raman spectroscopy proved that the increase in irradiation doses leads to an increase of structural disorder of SWCNTs, presumably in the form of defects in carbon nanotube walls. Examination of I-D to I-G ratio shows a three times larger degree of structural disorder after the irradiation treatment with 100 kGy. The analysis of carbon nanotube Raman spectra RBM bands determined the presence of both semiconducting and metallic carbon nanotubes after gamma irradiation treatment. These measurements prove that gamma irradiation treatments have a nonselective effect regarding different chirality and therefore conductance of nanotubes. Atomic force microscopy shows a significant carbon nanotube shortening as the effect of gamma radiation treatment. Nanotubes with length between 500 nm and 1 mu m are predominant.",
journal = "Hemijska industrija",
title = "Covalent Modification of Single Wall Carbon Nanotubes Upon Gamma Irradiation in Aqueous Media",
volume = "65",
number = "5",
pages = "479-487",
doi = "10.2298/HEMIND110531050J"
}

Jovanović, S. P., Marković, Z. M., Kleut, D., Tošić, D., Kepić, D. P., Marinović-Cincović, M., Holclajtner-Antunović, I. D.,& Todorović-Marković, B.. (2011). Covalent Modification of Single Wall Carbon Nanotubes Upon Gamma Irradiation in Aqueous Media. in Hemijska industrija, 65(5), 479-487.
https://doi.org/10.2298/HEMIND110531050J

Jovanović SP, Marković ZM, Kleut D, Tošić D, Kepić DP, Marinović-Cincović M, Holclajtner-Antunović ID, Todorović-Marković B. Covalent Modification of Single Wall Carbon Nanotubes Upon Gamma Irradiation in Aqueous Media. in Hemijska industrija. 2011;65(5):479-487.
doi:10.2298/HEMIND110531050J .

Jovanović, Svetlana P., Marković, Zoran M., Kleut, Duška, Tošić, Dragana, Kepić, Dejan P., Marinović-Cincović, Milena, Holclajtner-Antunović, Ivanka D., Todorović-Marković, Biljana, "Covalent Modification of Single Wall Carbon Nanotubes Upon Gamma Irradiation in Aqueous Media" in Hemijska industrija, 65, no. 5 (2011):479-487,
https://doi.org/10.2298/HEMIND110531050J . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Peruško, Davor
AU  - Tošić, Dragana
AU  - Romčević, Nebojša Ž.
AU  - Dramićanin, Miroslav
AU  - Nikolić, Zoran M.
AU  - Todorović-Marković, Biljana
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4349
AB  - Single wall carbon nanotubes (SWCNTs) represent an important group of nanomaterials with attractive electrical, chemical, and mechanical properties. In this work we have investigated the structural, optical and electrical properties of single wall carbon nanotube films deposited on copper substrate and then transferred to polymethyl methacrylate (PMMA). The properties of deposited films were varied by changing different parameters: substrate temperature, deposition time and electric field strength. Atomic force microscopy (AFM) was used to study the deposition process of SWCNT films on copper substrate. AFM analysis has shown that sodium dodecyl sulfate (SDS) micellas were deposited on copper substrate before carbon nanotubes because of their higher mobility. Raman spectroscopy revealed that SWCNTs deposited at elevated temperatures are oxidized. FTIR results showed that COOH groups and Cu2O were generated during electrophoretic process. The SWCNT films were transferred to PMMA substrate and they achieved a sheet resistance of 360 Omega/sq with 79% transparency at 550 nm wavelength and a strong adhesion to the substrate. The main reasons for higher values of sheet resistances of SWCNT thin films compared to those of other authors are oxidation of carbon nanotubes during electrophoresis and the presence of used surfactans in carbon matrix of deposited films.
T2  - Hemijska industrija
T1  - The Effect of Oxidation on Structural and Electrical Properties of Single Wall Carbon Nanotubes
VL  - 65
IS  - 4
SP  - 363
EP  - 370
DO  - 10.2298/HEMIND110221024M
ER  - 

@article{
author = "Marković, Zoran M. and Peruško, Davor and Tošić, Dragana and Romčević, Nebojša Ž. and Dramićanin, Miroslav and Nikolić, Zoran M. and Todorović-Marković, Biljana",
year = "2011",
abstract = "Single wall carbon nanotubes (SWCNTs) represent an important group of nanomaterials with attractive electrical, chemical, and mechanical properties. In this work we have investigated the structural, optical and electrical properties of single wall carbon nanotube films deposited on copper substrate and then transferred to polymethyl methacrylate (PMMA). The properties of deposited films were varied by changing different parameters: substrate temperature, deposition time and electric field strength. Atomic force microscopy (AFM) was used to study the deposition process of SWCNT films on copper substrate. AFM analysis has shown that sodium dodecyl sulfate (SDS) micellas were deposited on copper substrate before carbon nanotubes because of their higher mobility. Raman spectroscopy revealed that SWCNTs deposited at elevated temperatures are oxidized. FTIR results showed that COOH groups and Cu2O were generated during electrophoretic process. The SWCNT films were transferred to PMMA substrate and they achieved a sheet resistance of 360 Omega/sq with 79% transparency at 550 nm wavelength and a strong adhesion to the substrate. The main reasons for higher values of sheet resistances of SWCNT thin films compared to those of other authors are oxidation of carbon nanotubes during electrophoresis and the presence of used surfactans in carbon matrix of deposited films.",
journal = "Hemijska industrija",
title = "The Effect of Oxidation on Structural and Electrical Properties of Single Wall Carbon Nanotubes",
volume = "65",
number = "4",
pages = "363-370",
doi = "10.2298/HEMIND110221024M"
}

Marković, Z. M., Peruško, D., Tošić, D., Romčević, N. Ž., Dramićanin, M., Nikolić, Z. M.,& Todorović-Marković, B.. (2011). The Effect of Oxidation on Structural and Electrical Properties of Single Wall Carbon Nanotubes. in Hemijska industrija, 65(4), 363-370.
https://doi.org/10.2298/HEMIND110221024M

Marković ZM, Peruško D, Tošić D, Romčević NŽ, Dramićanin M, Nikolić ZM, Todorović-Marković B. The Effect of Oxidation on Structural and Electrical Properties of Single Wall Carbon Nanotubes. in Hemijska industrija. 2011;65(4):363-370.
doi:10.2298/HEMIND110221024M .

Marković, Zoran M., Peruško, Davor, Tošić, Dragana, Romčević, Nebojša Ž., Dramićanin, Miroslav, Nikolić, Zoran M., Todorović-Marković, Biljana, "The Effect of Oxidation on Structural and Electrical Properties of Single Wall Carbon Nanotubes" in Hemijska industrija, 65, no. 4 (2011):363-370,
https://doi.org/10.2298/HEMIND110221024M . .