TY  - CONF
AU  - Kovačević, Aleksander
AU  - Petrović, Suzana
AU  - Lekić, Marina
AU  - Vasić, Borislav
AU  - Salatić, Branislav
AU  - Potočnik, Jelena
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11857
AB  - Један од ефеката интеракције ултра-кратког ласерског снопа са материјалима је формирање паралелних структура на површини (laser-induced parallel surface structures - LIPSS), чији је период мањи од таласне дужине снопа. Уколико се ради о вишеслојним танким филмовима метала, квалитет формираних структура је бољи. Узорак од пет двослојних танких филмова Al и Ti на супстрату Si смо изложили фемтосекундном снопу и запазили формирање две врсте структура које се разликују по облику. Обе су врсте вероватно узроковане појавом површинског плазмонаполаритона на површини најгорњег слоја. Појава плазмона поларитона на површини танких металних филмова и наночестица може да ограничи простирање електромагнетног поља и да појача флуоресцентни сигнал из молекула хемикалије на површини. У зависности од структуре интерфејса за одређивање циљне хемикалије на металној површини флуоресценција побољшана плазмоном (plasmon-enhanced fluorescence, PEF) је привлачан метод за скраћење времена и појачање осетљивости разних аналитичких технологија које се користе у форензици.
AB  - One of the effects of the interaction of ultrashort laser beam with materials is the forming of laser-induced parallel surface structures (LIPSS), with period less than beam wavelength. For multilayer thin metal films, the quality of formed structures is better. The sample of five bilayers of Al and Ti on Si substrate was exposed to femtosecond beam and noticed the forming of of two types of structures different in shape. Both are most probably the product of surface Plasmon polariton on the surface of most top layer. The occurrence of Plasmon polariton on the surface of thin metal layers and nanoparticles can confine the propagation of electromagnetic field and to amplify the fluorescent signal from molecules of the chemical compound on the surface. Depending on the interface structure for determining the target chemical on metal surface, Plasmon enhanced fluorescence is an attractive method for shortening the time of detection and increasing the sensitivity of various analytical technologies used in forensics.
PB  - Belgrade : ETRAN Society
PB  - Belgrade : Academic Mind
C3  - 9th International Conference IcETRAN and 66th ETRAN Conference : Proceedings ; June 6-9, 2022 ; Novi Pazar
T1  - Суб-микрометарске паралелне површинске
структуре индуковане фемтосекундним
ласерским снопом у форензици
T1  - Sub-micrometer parallel surface structures induced by femtosecond laser beam in forensics
SP  - 901
EP  - 905
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11857
ER  - 

@conference{
author = "Kovačević, Aleksander and Petrović, Suzana and Lekić, Marina and Vasić, Borislav and Salatić, Branislav and Potočnik, Jelena",
year = "2022",
abstract = "Један од ефеката интеракције ултра-кратког ласерског снопа са материјалима је формирање паралелних структура на површини (laser-induced parallel surface structures - LIPSS), чији је период мањи од таласне дужине снопа. Уколико се ради о вишеслојним танким филмовима метала, квалитет формираних структура је бољи. Узорак од пет двослојних танких филмова Al и Ti на супстрату Si смо изложили фемтосекундном снопу и запазили формирање две врсте структура које се разликују по облику. Обе су врсте вероватно узроковане појавом површинског плазмонаполаритона на површини најгорњег слоја. Појава плазмона поларитона на површини танких металних филмова и наночестица може да ограничи простирање електромагнетног поља и да појача флуоресцентни сигнал из молекула хемикалије на површини. У зависности од структуре интерфејса за одређивање циљне хемикалије на металној површини флуоресценција побољшана плазмоном (plasmon-enhanced fluorescence, PEF) је привлачан метод за скраћење времена и појачање осетљивости разних аналитичких технологија које се користе у форензици., One of the effects of the interaction of ultrashort laser beam with materials is the forming of laser-induced parallel surface structures (LIPSS), with period less than beam wavelength. For multilayer thin metal films, the quality of formed structures is better. The sample of five bilayers of Al and Ti on Si substrate was exposed to femtosecond beam and noticed the forming of of two types of structures different in shape. Both are most probably the product of surface Plasmon polariton on the surface of most top layer. The occurrence of Plasmon polariton on the surface of thin metal layers and nanoparticles can confine the propagation of electromagnetic field and to amplify the fluorescent signal from molecules of the chemical compound on the surface. Depending on the interface structure for determining the target chemical on metal surface, Plasmon enhanced fluorescence is an attractive method for shortening the time of detection and increasing the sensitivity of various analytical technologies used in forensics.",
publisher = "Belgrade : ETRAN Society, Belgrade : Academic Mind",
journal = "9th International Conference IcETRAN and 66th ETRAN Conference : Proceedings ; June 6-9, 2022 ; Novi Pazar",
title = "Суб-микрометарске паралелне површинске
структуре индуковане фемтосекундним
ласерским снопом у форензици, Sub-micrometer parallel surface structures induced by femtosecond laser beam in forensics",
pages = "901-905",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11857"
}

Kovačević, A., Petrović, S., Lekić, M., Vasić, B., Salatić, B.,& Potočnik, J.. (2022). Суб-микрометарске паралелне површинске
структуре индуковане фемтосекундним
ласерским снопом у форензици. in 9th International Conference IcETRAN and 66th ETRAN Conference : Proceedings ; June 6-9, 2022 ; Novi Pazar
Belgrade : ETRAN Society., 901-905.
https://hdl.handle.net/21.15107/rcub_vinar_11857

Kovačević A, Petrović S, Lekić M, Vasić B, Salatić B, Potočnik J. Суб-микрометарске паралелне површинске
структуре индуковане фемтосекундним
ласерским снопом у форензици. in 9th International Conference IcETRAN and 66th ETRAN Conference : Proceedings ; June 6-9, 2022 ; Novi Pazar. 2022;:901-905.
https://hdl.handle.net/21.15107/rcub_vinar_11857 .

Kovačević, Aleksander, Petrović, Suzana, Lekić, Marina, Vasić, Borislav, Salatić, Branislav, Potočnik, Jelena, "Суб-микрометарске паралелне површинске
структуре индуковане фемтосекундним
ласерским снопом у форензици" in 9th International Conference IcETRAN and 66th ETRAN Conference : Proceedings ; June 6-9, 2022 ; Novi Pazar (2022):901-905,
https://hdl.handle.net/21.15107/rcub_vinar_11857 .

TY  - JOUR
AU  - Vujković, Milica 
AU  - Etinski, Mihajlo
AU  - Vasić, Borislav
AU  - Kuzmanović, Bojana
AU  - Bajuk-Bogdanović, Danica V.
AU  - Dominko, Robert
AU  - Mentus, Slavko V.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9645
AB  - The high redox activity of polyaniline emeraldine salt (PANI-ES) was revealed in the aqueous solution of Al-salt, which makes this polymer attractive as an electrode material for aqueous aluminum electrochemical storage devices. Its redox behavior in Al(NO3)3, Al(NO3)3+HCl, AlCl3 and HCl was investigated by Cyclic Voltammetry and Chronopotentiometry. While the proton exchange determines PANI's redox behavior in strong acidic solutions, anion doping/dedoping is a more dominant process in less acidic Al-salt solutions. The formation/dissolution of solid-state nitrate complexes is proposed to happen during PANI's redox switching in Al(NO3)3, which causes disappearance and reappearance of grain boundaries, as revealed by AFM. Combined experimental and DFT approaches identify Al-salt as a secondary dopant of protonated PANI-ES (by Lewis acid-base complexation), which causes polaron→bipolaron conversion. The change in the redox mechanism of PANI-ES, caused by the substitution of HCl with Al(NO3)3, did not attenuate its charge storage ability. Moreover, PANI-ES delivers a higher capacitance in Al(NO3)3, amounting to 269 F g−1 at 10 A g−1. Furthermore, the use of Al(NO3)3 results in attenuated electrochemical PANI overoxidation, when compared to HCl, thus providing better capacitance retention upon potentiodynamic cycling. The results open novel perspective of using PANI-based materials for more suitable energy storage devices.
T2  - Journal of Power Sources
T1  - Polyaniline as a charge storage material in an aqueous aluminum-based electrolyte: Can aluminum ions play the role of protons?
VL  - 482
SP  - 228937
DO  - 10.1016/j.jpowsour.2020.228937
ER  - 

@article{
author = "Vujković, Milica  and Etinski, Mihajlo and Vasić, Borislav and Kuzmanović, Bojana and Bajuk-Bogdanović, Danica V. and Dominko, Robert and Mentus, Slavko V.",
year = "2021",
abstract = "The high redox activity of polyaniline emeraldine salt (PANI-ES) was revealed in the aqueous solution of Al-salt, which makes this polymer attractive as an electrode material for aqueous aluminum electrochemical storage devices. Its redox behavior in Al(NO3)3, Al(NO3)3+HCl, AlCl3 and HCl was investigated by Cyclic Voltammetry and Chronopotentiometry. While the proton exchange determines PANI's redox behavior in strong acidic solutions, anion doping/dedoping is a more dominant process in less acidic Al-salt solutions. The formation/dissolution of solid-state nitrate complexes is proposed to happen during PANI's redox switching in Al(NO3)3, which causes disappearance and reappearance of grain boundaries, as revealed by AFM. Combined experimental and DFT approaches identify Al-salt as a secondary dopant of protonated PANI-ES (by Lewis acid-base complexation), which causes polaron→bipolaron conversion. The change in the redox mechanism of PANI-ES, caused by the substitution of HCl with Al(NO3)3, did not attenuate its charge storage ability. Moreover, PANI-ES delivers a higher capacitance in Al(NO3)3, amounting to 269 F g−1 at 10 A g−1. Furthermore, the use of Al(NO3)3 results in attenuated electrochemical PANI overoxidation, when compared to HCl, thus providing better capacitance retention upon potentiodynamic cycling. The results open novel perspective of using PANI-based materials for more suitable energy storage devices.",
journal = "Journal of Power Sources",
title = "Polyaniline as a charge storage material in an aqueous aluminum-based electrolyte: Can aluminum ions play the role of protons?",
volume = "482",
pages = "228937",
doi = "10.1016/j.jpowsour.2020.228937"
}

Vujković, M., Etinski, M., Vasić, B., Kuzmanović, B., Bajuk-Bogdanović, D. V., Dominko, R.,& Mentus, S. V.. (2021). Polyaniline as a charge storage material in an aqueous aluminum-based electrolyte: Can aluminum ions play the role of protons?. in Journal of Power Sources, 482, 228937.
https://doi.org/10.1016/j.jpowsour.2020.228937

Vujković M, Etinski M, Vasić B, Kuzmanović B, Bajuk-Bogdanović DV, Dominko R, Mentus SV. Polyaniline as a charge storage material in an aqueous aluminum-based electrolyte: Can aluminum ions play the role of protons?. in Journal of Power Sources. 2021;482:228937.
doi:10.1016/j.jpowsour.2020.228937 .

Vujković, Milica , Etinski, Mihajlo, Vasić, Borislav, Kuzmanović, Bojana, Bajuk-Bogdanović, Danica V., Dominko, Robert, Mentus, Slavko V., "Polyaniline as a charge storage material in an aqueous aluminum-based electrolyte: Can aluminum ions play the role of protons?" in Journal of Power Sources, 482 (2021):228937,
https://doi.org/10.1016/j.jpowsour.2020.228937 . .

TY  - JOUR
AU  - Isić, Goran
AU  - Zografopoulos, Dimitrios C.
AU  - Stojanović, Danka
AU  - Vasić, Borislav Z.
AU  - Belić, Milivoj R.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9071
AB  - Beam steering is one of the prevailing functions performed by electromagnetic metasurfaces. Its efficiency depends on a large number of physical parameters associated with resonant elements comprising the metasurface and is thus notoriously difficult to optimize. Here we formulate a theoretical model for evaluating the diffraction efficiency of an array of lossy resonant elements whose spectral response is dominated by the coupling between a leaky eigenmode and a single incoming/outgoing channel. We use it to deduce a formula for the maximum attainable diffraction efficiency and the gradient parameter profile for which it is achieved. The optimization procedure is demonstrated on the example of an electrically tunable liquid-crystal terahertz beam steering metasurface. Finally, the proposed model is benchmarked against rigorous metasurface simulations. © 1995-2012 IEEE.
PB  - IEEE
T2  - IEEE Journal of Selected Topics in Quantum Electronics
T1  - Beam Steering Efficiency in Resonant Reflective Metasurfaces
VL  - 27
IS  - 1
SP  - 9130831
DO  - 10.1109/JSTQE.2020.3006368
ER  - 

@article{
author = "Isić, Goran and Zografopoulos, Dimitrios C. and Stojanović, Danka and Vasić, Borislav Z. and Belić, Milivoj R.",
year = "2021",
abstract = "Beam steering is one of the prevailing functions performed by electromagnetic metasurfaces. Its efficiency depends on a large number of physical parameters associated with resonant elements comprising the metasurface and is thus notoriously difficult to optimize. Here we formulate a theoretical model for evaluating the diffraction efficiency of an array of lossy resonant elements whose spectral response is dominated by the coupling between a leaky eigenmode and a single incoming/outgoing channel. We use it to deduce a formula for the maximum attainable diffraction efficiency and the gradient parameter profile for which it is achieved. The optimization procedure is demonstrated on the example of an electrically tunable liquid-crystal terahertz beam steering metasurface. Finally, the proposed model is benchmarked against rigorous metasurface simulations. © 1995-2012 IEEE.",
publisher = "IEEE",
journal = "IEEE Journal of Selected Topics in Quantum Electronics",
title = "Beam Steering Efficiency in Resonant Reflective Metasurfaces",
volume = "27",
number = "1",
pages = "9130831",
doi = "10.1109/JSTQE.2020.3006368"
}

Isić, G., Zografopoulos, D. C., Stojanović, D., Vasić, B. Z.,& Belić, M. R.. (2021). Beam Steering Efficiency in Resonant Reflective Metasurfaces. in IEEE Journal of Selected Topics in Quantum Electronics
IEEE., 27(1), 9130831.
https://doi.org/10.1109/JSTQE.2020.3006368

Isić G, Zografopoulos DC, Stojanović D, Vasić BZ, Belić MR. Beam Steering Efficiency in Resonant Reflective Metasurfaces. in IEEE Journal of Selected Topics in Quantum Electronics. 2021;27(1):9130831.
doi:10.1109/JSTQE.2020.3006368 .

Isić, Goran, Zografopoulos, Dimitrios C., Stojanović, Danka, Vasić, Borislav Z., Belić, Milivoj R., "Beam Steering Efficiency in Resonant Reflective Metasurfaces" in IEEE Journal of Selected Topics in Quantum Electronics, 27, no. 1 (2021):9130831,
https://doi.org/10.1109/JSTQE.2020.3006368 . .

TY  - JOUR
AU  - Kovačević, Aleksander
AU  - Petrović, Suzana
AU  - Salatić, Branislav
AU  - Lekić, Marina
AU  - Vasić, Borislav Z.
AU  - Gajić, Radoš
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9015
AB  - The occurrence of laser-induced periodic surface structures (LIPSS) has been known for a while. Multilayer thin films, like Al/Ti, are suitable for LIPSS formation and attractive for applications—due to their wearing behavior and corrosion resistance; LIPSS generation may improve their properties as well. LIPSS properties depend not only on the material but also on the beam characteristics, like wavelength, polarization and scanning directions, etc. After exposing with NIR femtosecond pulses from Coherent Mira 900 laser system in several beam exposures, we have analyzed the samples of thin metal film systems with Tescan Mira3 SEM and NTegra AFM. The formation of LIPSS is most probably due to the generation of surface plasmon polariton, through the periodic distribution of energy in the interaction zone which lead to thermal processes in layers and interfaces. Two types of LIPSS were generated, which differ in shape, orientation and in ablation pronounced or not. For consecutive interactions in the same direction, LIPSS maintained its orientation, while for orthogonal passes LIPSS with mutually orthogonal orientation were generated. LIPSS period fluctuated between 320 and 380 nm and structures with pronounced ablation have significantly smaller width. Probable mechanism is that for greater accumulated energy pronounced ablation takes place giving LIPSS in the form of trenches or grooves, while for less accumulated energy the buildup of the material—probably due to pronounced oxidation—lead to LIPSS in the form of hills or ridges.
T2  - Optical and Quantum Electronics
T1  - Inducing LIPSS on multilayer thin metal films by femtosecond laser beam of different orientations
VL  - 52
IS  - 6
SP  - 301
DO  - 10.1007/s11082-020-02398-2
ER  - 

@article{
author = "Kovačević, Aleksander and Petrović, Suzana and Salatić, Branislav and Lekić, Marina and Vasić, Borislav Z. and Gajić, Radoš and Pantelić, Dejan and Jelenković, Branislav",
year = "2020",
abstract = "The occurrence of laser-induced periodic surface structures (LIPSS) has been known for a while. Multilayer thin films, like Al/Ti, are suitable for LIPSS formation and attractive for applications—due to their wearing behavior and corrosion resistance; LIPSS generation may improve their properties as well. LIPSS properties depend not only on the material but also on the beam characteristics, like wavelength, polarization and scanning directions, etc. After exposing with NIR femtosecond pulses from Coherent Mira 900 laser system in several beam exposures, we have analyzed the samples of thin metal film systems with Tescan Mira3 SEM and NTegra AFM. The formation of LIPSS is most probably due to the generation of surface plasmon polariton, through the periodic distribution of energy in the interaction zone which lead to thermal processes in layers and interfaces. Two types of LIPSS were generated, which differ in shape, orientation and in ablation pronounced or not. For consecutive interactions in the same direction, LIPSS maintained its orientation, while for orthogonal passes LIPSS with mutually orthogonal orientation were generated. LIPSS period fluctuated between 320 and 380 nm and structures with pronounced ablation have significantly smaller width. Probable mechanism is that for greater accumulated energy pronounced ablation takes place giving LIPSS in the form of trenches or grooves, while for less accumulated energy the buildup of the material—probably due to pronounced oxidation—lead to LIPSS in the form of hills or ridges.",
journal = "Optical and Quantum Electronics",
title = "Inducing LIPSS on multilayer thin metal films by femtosecond laser beam of different orientations",
volume = "52",
number = "6",
pages = "301",
doi = "10.1007/s11082-020-02398-2"
}

Kovačević, A., Petrović, S., Salatić, B., Lekić, M., Vasić, B. Z., Gajić, R., Pantelić, D.,& Jelenković, B.. (2020). Inducing LIPSS on multilayer thin metal films by femtosecond laser beam of different orientations. in Optical and Quantum Electronics, 52(6), 301.
https://doi.org/10.1007/s11082-020-02398-2

Kovačević A, Petrović S, Salatić B, Lekić M, Vasić BZ, Gajić R, Pantelić D, Jelenković B. Inducing LIPSS on multilayer thin metal films by femtosecond laser beam of different orientations. in Optical and Quantum Electronics. 2020;52(6):301.
doi:10.1007/s11082-020-02398-2 .

Kovačević, Aleksander, Petrović, Suzana, Salatić, Branislav, Lekić, Marina, Vasić, Borislav Z., Gajić, Radoš, Pantelić, Dejan, Jelenković, Branislav, "Inducing LIPSS on multilayer thin metal films by femtosecond laser beam of different orientations" in Optical and Quantum Electronics, 52, no. 6 (2020):301,
https://doi.org/10.1007/s11082-020-02398-2 . .

TY  - CONF
AU  - Miletić, M.
AU  - Aškrabić, S.
AU  - Schie, I.
AU  - Rüger, J.
AU  - Korićanac, Lela
AU  - Mondol, A. S.
AU  - Vasić, Borislav
AU  - Dohčević-Mitrović, Zorana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11881
AB  - Study of the interaction between nanoparticles and human cells is usually performed using customized biochemical assays that mostly offer measurements of a single quantity/property and use labels. Raman spectroscopy on the other hand offers integral insight into complex information on biomolecular composition and molecule conformation inside cells by measuring vibrational spectra from the entire cell [1]. Furthermore, it does not require dyes nor other labels and sample preparation is very simple, which reduces time consumation and possibility of cell damage during preparation. Cerium-dioxide (CeO2) nanoparticles are known for their controversial dual activity in numerous studied cancer cell lines: while protecting some cell types from oxidative damage, their cytotoxic effect in other cell lines is also reported [2, 3]. Here, effects of two types of CeO2 nanoparticles: uncoated and dextran-coated, were studied in HeLa cells, a cervical carcinoma derived cell line. Nanoparticle-treated cells were probed by routinely used biological assays for cell growth and viability, based on dying with Sulforhodamine B and Trypan Blue, respectively [3]. The tests have shown that the nanoparticles have more prominent effect on cell growth than on viability. In the light of this information Raman spectroscopy was employed in order to investigate the changes in biomolecular content of the cervical cancer cells after treatment with nanoparticles and find connection between these changes and the resulting cell status. Raman spectra of nanoparticletreated and control (untreated) cells were obtained using 532 nm laser line as an excitation probe. From each experimental group, at least 250 cell spectra were measured. Principal component analysis (PCA) covering the spectral regions (700-1800) cm-1 and (2800-3200) cm-1 has extracted the differences between vibrational spectra features of nanoparticle-treated and control cells, but also between spectra of cells treated with uncoated and coated CeO2 nanoparticles. These changes have been associated with induced alterations of prominent groups of biomolecules, DNA, lipids and proteins. Reduced total DNA content and/or breaking of O-P-O bonds leads to the decreased vibrational intensity of 785 cm-1 peak which differentiates to a large degree treated and control cells. Amide I vibrational band (1600-1670) cm-1 , characteristic for peptide bonds and modulated by proteins secondary structure, differentiates between cells treated with coated and uncoated nanoparticles. Correlation of the spectral information with the results of biological assays was performed.
PB  - Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
T1  - Effects of cerium-dioxide nanoparticles in cervical cancer cells studied by Raman spectroscopy
SP  - 132
EP  - 132
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11881
ER  - 

@conference{
author = "Miletić, M. and Aškrabić, S. and Schie, I. and Rüger, J. and Korićanac, Lela and Mondol, A. S. and Vasić, Borislav and Dohčević-Mitrović, Zorana",
year = "2019",
abstract = "Study of the interaction between nanoparticles and human cells is usually performed using customized biochemical assays that mostly offer measurements of a single quantity/property and use labels. Raman spectroscopy on the other hand offers integral insight into complex information on biomolecular composition and molecule conformation inside cells by measuring vibrational spectra from the entire cell [1]. Furthermore, it does not require dyes nor other labels and sample preparation is very simple, which reduces time consumation and possibility of cell damage during preparation. Cerium-dioxide (CeO2) nanoparticles are known for their controversial dual activity in numerous studied cancer cell lines: while protecting some cell types from oxidative damage, their cytotoxic effect in other cell lines is also reported [2, 3]. Here, effects of two types of CeO2 nanoparticles: uncoated and dextran-coated, were studied in HeLa cells, a cervical carcinoma derived cell line. Nanoparticle-treated cells were probed by routinely used biological assays for cell growth and viability, based on dying with Sulforhodamine B and Trypan Blue, respectively [3]. The tests have shown that the nanoparticles have more prominent effect on cell growth than on viability. In the light of this information Raman spectroscopy was employed in order to investigate the changes in biomolecular content of the cervical cancer cells after treatment with nanoparticles and find connection between these changes and the resulting cell status. Raman spectra of nanoparticletreated and control (untreated) cells were obtained using 532 nm laser line as an excitation probe. From each experimental group, at least 250 cell spectra were measured. Principal component analysis (PCA) covering the spectral regions (700-1800) cm-1 and (2800-3200) cm-1 has extracted the differences between vibrational spectra features of nanoparticle-treated and control cells, but also between spectra of cells treated with uncoated and coated CeO2 nanoparticles. These changes have been associated with induced alterations of prominent groups of biomolecules, DNA, lipids and proteins. Reduced total DNA content and/or breaking of O-P-O bonds leads to the decreased vibrational intensity of 785 cm-1 peak which differentiates to a large degree treated and control cells. Amide I vibrational band (1600-1670) cm-1 , characteristic for peptide bonds and modulated by proteins secondary structure, differentiates between cells treated with coated and uncoated nanoparticles. Correlation of the spectral information with the results of biological assays was performed.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts",
title = "Effects of cerium-dioxide nanoparticles in cervical cancer cells studied by Raman spectroscopy",
pages = "132-132",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11881"
}

Miletić, M., Aškrabić, S., Schie, I., Rüger, J., Korićanac, L., Mondol, A. S., Vasić, B.,& Dohčević-Mitrović, Z.. (2019). Effects of cerium-dioxide nanoparticles in cervical cancer cells studied by Raman spectroscopy. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts
Belgrade : Vinča Institute of Nuclear Sciences, University of Belgrade., 132-132.
https://hdl.handle.net/21.15107/rcub_vinar_11881

Miletić M, Aškrabić S, Schie I, Rüger J, Korićanac L, Mondol AS, Vasić B, Dohčević-Mitrović Z. Effects of cerium-dioxide nanoparticles in cervical cancer cells studied by Raman spectroscopy. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts. 2019;:132-132.
https://hdl.handle.net/21.15107/rcub_vinar_11881 .

Miletić, M., Aškrabić, S., Schie, I., Rüger, J., Korićanac, Lela, Mondol, A. S., Vasić, Borislav, Dohčević-Mitrović, Zorana, "Effects of cerium-dioxide nanoparticles in cervical cancer cells studied by Raman spectroscopy" in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts (2019):132-132,
https://hdl.handle.net/21.15107/rcub_vinar_11881 .

TY  - JOUR
AU  - Hadžić, Branka B.
AU  - Vasić, Borislav Z.
AU  - Matović, Branko
AU  - Kuryliszyn-Kudelska, Izabela
AU  - Dobrowolski, Witold D.
AU  - Romčević, Maja J.
AU  - Romčević, Nebojša Ž.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7778
AB  - The phase changes of MnO nanoparticles under laser-induced heating have been studied. Previous confirmation of the existence of MnO phase was based on the X-ray diffraction measurements. Here, we report the experimental spectra of nonresonant Raman scattering in the range between 100 and 1,600cm(-1), for a sample irradiated with 8 different laser powers. The laser-induced heating has produced change in existing phases in sample, destruction of MnO phase, and creation of MnO2, Mn3O4, and MnOOH phases along with formation of Mn2+ on the sample surface. These phase changes have been confirmed by X-ray diffraction and atomic force microscopy measurements.
T2  - Journal of Raman Spectroscopy
T1  - Influence of laser-induced heating on MnO nanoparticles
VL  - 49
IS  - 5
SP  - 817
EP  - 821
DO  - 10.1002/jrs.5358
ER  - 

@article{
author = "Hadžić, Branka B. and Vasić, Borislav Z. and Matović, Branko and Kuryliszyn-Kudelska, Izabela and Dobrowolski, Witold D. and Romčević, Maja J. and Romčević, Nebojša Ž.",
year = "2018",
abstract = "The phase changes of MnO nanoparticles under laser-induced heating have been studied. Previous confirmation of the existence of MnO phase was based on the X-ray diffraction measurements. Here, we report the experimental spectra of nonresonant Raman scattering in the range between 100 and 1,600cm(-1), for a sample irradiated with 8 different laser powers. The laser-induced heating has produced change in existing phases in sample, destruction of MnO phase, and creation of MnO2, Mn3O4, and MnOOH phases along with formation of Mn2+ on the sample surface. These phase changes have been confirmed by X-ray diffraction and atomic force microscopy measurements.",
journal = "Journal of Raman Spectroscopy",
title = "Influence of laser-induced heating on MnO nanoparticles",
volume = "49",
number = "5",
pages = "817-821",
doi = "10.1002/jrs.5358"
}

Hadžić, B. B., Vasić, B. Z., Matović, B., Kuryliszyn-Kudelska, I., Dobrowolski, W. D., Romčević, M. J.,& Romčević, N. Ž.. (2018). Influence of laser-induced heating on MnO nanoparticles. in Journal of Raman Spectroscopy, 49(5), 817-821.
https://doi.org/10.1002/jrs.5358

Hadžić BB, Vasić BZ, Matović B, Kuryliszyn-Kudelska I, Dobrowolski WD, Romčević MJ, Romčević NŽ. Influence of laser-induced heating on MnO nanoparticles. in Journal of Raman Spectroscopy. 2018;49(5):817-821.
doi:10.1002/jrs.5358 .

Hadžić, Branka B., Vasić, Borislav Z., Matović, Branko, Kuryliszyn-Kudelska, Izabela, Dobrowolski, Witold D., Romčević, Maja J., Romčević, Nebojša Ž., "Influence of laser-induced heating on MnO nanoparticles" in Journal of Raman Spectroscopy, 49, no. 5 (2018):817-821,
https://doi.org/10.1002/jrs.5358 . .

TY  - JOUR
AU  - Mitrić, Jelena
AU  - Paunović, Novica M.
AU  - Mitrić, Miodrag
AU  - Vasić, Borislav Z.
AU  - Ralević, Uroš
AU  - Trajić, Jelena
AU  - Romčević, Maja J.
AU  - Dobrowolski, Witold D.
AU  - Yahia, Ibrahim S.
AU  - Romčević, Nebojša Ž.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7808
AB  - Structural and optical properties of CdTe thin films were investigated applying atomic force microscopy (AFM), XRD powder technique, Raman spectroscopy and far–infrared spectroscopy. CdTe thin films were prepared by using thermal evaporation technique. In the analysis of the far – infrared reflection spectra, numerical model for calculating the reflectivity coefficient for system which includes films and substrate has been applied. Effective permittivity of film mixture (CdTe and air) was modeled by Maxwell – Garnet approximation. We reveal the existence of surface optical phonon (SOP) mode and coupled plasmon-SOP modes (CPSOPM). © 2018 Elsevier B.V.
T2  - Physica E: Low-dimensional Systems and Nanostructures
T1  - Surface optical phonon – Plasmon interaction in nanodimensional CdTe thin films
VL  - 104
SP  - 64
EP  - 70
DO  - 10.1016/j.physe.2018.07.021
ER  - 

@article{
author = "Mitrić, Jelena and Paunović, Novica M. and Mitrić, Miodrag and Vasić, Borislav Z. and Ralević, Uroš and Trajić, Jelena and Romčević, Maja J. and Dobrowolski, Witold D. and Yahia, Ibrahim S. and Romčević, Nebojša Ž.",
year = "2018",
abstract = "Structural and optical properties of CdTe thin films were investigated applying atomic force microscopy (AFM), XRD powder technique, Raman spectroscopy and far–infrared spectroscopy. CdTe thin films were prepared by using thermal evaporation technique. In the analysis of the far – infrared reflection spectra, numerical model for calculating the reflectivity coefficient for system which includes films and substrate has been applied. Effective permittivity of film mixture (CdTe and air) was modeled by Maxwell – Garnet approximation. We reveal the existence of surface optical phonon (SOP) mode and coupled plasmon-SOP modes (CPSOPM). © 2018 Elsevier B.V.",
journal = "Physica E: Low-dimensional Systems and Nanostructures",
title = "Surface optical phonon – Plasmon interaction in nanodimensional CdTe thin films",
volume = "104",
pages = "64-70",
doi = "10.1016/j.physe.2018.07.021"
}

Mitrić, J., Paunović, N. M., Mitrić, M., Vasić, B. Z., Ralević, U., Trajić, J., Romčević, M. J., Dobrowolski, W. D., Yahia, I. S.,& Romčević, N. Ž.. (2018). Surface optical phonon – Plasmon interaction in nanodimensional CdTe thin films. in Physica E: Low-dimensional Systems and Nanostructures, 104, 64-70.
https://doi.org/10.1016/j.physe.2018.07.021

Mitrić J, Paunović NM, Mitrić M, Vasić BZ, Ralević U, Trajić J, Romčević MJ, Dobrowolski WD, Yahia IS, Romčević NŽ. Surface optical phonon – Plasmon interaction in nanodimensional CdTe thin films. in Physica E: Low-dimensional Systems and Nanostructures. 2018;104:64-70.
doi:10.1016/j.physe.2018.07.021 .

Mitrić, Jelena, Paunović, Novica M., Mitrić, Miodrag, Vasić, Borislav Z., Ralević, Uroš, Trajić, Jelena, Romčević, Maja J., Dobrowolski, Witold D., Yahia, Ibrahim S., Romčević, Nebojša Ž., "Surface optical phonon – Plasmon interaction in nanodimensional CdTe thin films" in Physica E: Low-dimensional Systems and Nanostructures, 104 (2018):64-70,
https://doi.org/10.1016/j.physe.2018.07.021 . .

TY  - CONF
AU  - Kovačević, Aleksander G.
AU  - Petrović, Suzana
AU  - Lekić, Marina
AU  - Peruško, Davor
AU  - Lazović, Vladimir
AU  - Savić-Šević, Svetlana
AU  - Vasić, Borislav
AU  - Salatić, Branislav
AU  - Gajić, Radoš
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12275
PB  - Belgrade : Institute of physics
C3  - 11th Workshop on PHOTONICS : Book of abstracts
T1  - Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during cross-directional scanning
SP  - 34
EP  - 34
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12275
ER  - 

@conference{
author = "Kovačević, Aleksander G. and Petrović, Suzana and Lekić, Marina and Peruško, Davor and Lazović, Vladimir and Savić-Šević, Svetlana and Vasić, Borislav and Salatić, Branislav and Gajić, Radoš and Pantelić, Dejan and Jelenković, Branislav",
year = "2018",
publisher = "Belgrade : Institute of physics",
journal = "11th Workshop on PHOTONICS : Book of abstracts",
title = "Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during cross-directional scanning",
pages = "34-34",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12275"
}

Kovačević, A. G., Petrović, S., Lekić, M., Peruško, D., Lazović, V., Savić-Šević, S., Vasić, B., Salatić, B., Gajić, R., Pantelić, D.,& Jelenković, B.. (2018). Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during cross-directional scanning. in 11th Workshop on PHOTONICS : Book of abstracts
Belgrade : Institute of physics., 34-34.
https://hdl.handle.net/21.15107/rcub_vinar_12275

Kovačević AG, Petrović S, Lekić M, Peruško D, Lazović V, Savić-Šević S, Vasić B, Salatić B, Gajić R, Pantelić D, Jelenković B. Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during cross-directional scanning. in 11th Workshop on PHOTONICS : Book of abstracts. 2018;:34-34.
https://hdl.handle.net/21.15107/rcub_vinar_12275 .

Kovačević, Aleksander G., Petrović, Suzana, Lekić, Marina, Peruško, Davor, Lazović, Vladimir, Savić-Šević, Svetlana, Vasić, Borislav, Salatić, Branislav, Gajić, Radoš, Pantelić, Dejan, Jelenković, Branislav, "Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during cross-directional scanning" in 11th Workshop on PHOTONICS : Book of abstracts (2018):34-34,
https://hdl.handle.net/21.15107/rcub_vinar_12275 .

TY  - CONF
AU  - Kovačević, Aleksander G.
AU  - Petrović, Suzana
AU  - Lekić, Marina
AU  - Peruško, Davor
AU  - Lazović, Vladimir
AU  - Savić-Šević, Svetlana
AU  - Vasić, Borislav
AU  - Salatić, Branislav
AU  - Gajić, Radoš
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12276
PB  - Belgrade : Institute of physics
C3  - 11th Workshop on PHOTONICS : Book of abstracts
T1  - Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during multi-pass scanning
SP  - 35
EP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12276
ER  - 

@conference{
author = "Kovačević, Aleksander G. and Petrović, Suzana and Lekić, Marina and Peruško, Davor and Lazović, Vladimir and Savić-Šević, Svetlana and Vasić, Borislav and Salatić, Branislav and Gajić, Radoš and Pantelić, Dejan and Jelenković, Branislav",
year = "2018",
publisher = "Belgrade : Institute of physics",
journal = "11th Workshop on PHOTONICS : Book of abstracts",
title = "Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during multi-pass scanning",
pages = "35-35",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12276"
}

Kovačević, A. G., Petrović, S., Lekić, M., Peruško, D., Lazović, V., Savić-Šević, S., Vasić, B., Salatić, B., Gajić, R., Pantelić, D.,& Jelenković, B.. (2018). Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during multi-pass scanning. in 11th Workshop on PHOTONICS : Book of abstracts
Belgrade : Institute of physics., 35-35.
https://hdl.handle.net/21.15107/rcub_vinar_12276

Kovačević AG, Petrović S, Lekić M, Peruško D, Lazović V, Savić-Šević S, Vasić B, Salatić B, Gajić R, Pantelić D, Jelenković B. Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during multi-pass scanning. in 11th Workshop on PHOTONICS : Book of abstracts. 2018;:35-35.
https://hdl.handle.net/21.15107/rcub_vinar_12276 .

Kovačević, Aleksander G., Petrović, Suzana, Lekić, Marina, Peruško, Davor, Lazović, Vladimir, Savić-Šević, Svetlana, Vasić, Borislav, Salatić, Branislav, Gajić, Radoš, Pantelić, Dejan, Jelenković, Branislav, "Formation of LIPSS on Al/Ti thin metal films by scanning of low-fluence femtosecond beam during multi-pass scanning" in 11th Workshop on PHOTONICS : Book of abstracts (2018):35-35,
https://hdl.handle.net/21.15107/rcub_vinar_12276 .

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Tsibidis, George D.
AU  - Skoulas, Evangelos
AU  - Petrović, Suzana
AU  - Vasić, Borislav Z.
AU  - Stratakis, Emmanuel
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1880
AB  - The interaction of ultra-short laser pulses with Titanium/Aluminium (Ti/Al) nano-layered thin film was investigated. The sample composed of alternating Ti and Al layers of a few nanometres thick was deposited by ion-sputtering. A single pulse irradiation experiment was conducted in an ambient air environment using focused and linearly polarized femtosecond laser pulses for the investigation of the ablation effects. The laser induced morphological changes and the composition were characterized using several microscopy techniques and energy dispersive X-ray spectroscopy. The following results were obtained: (i) at low values of pulse energy/fluence, ablation of the upper Ti layer only was observed; (ii) at higher laser fluence, a two-step ablation of Ti and Al layers takes place, followed by partial removal of the nano-layered film. The experimental observations were supported by a theoretical model accounting for the thermal response of the multiple layered structure upon irradiation with ultra-short laser pulses. Published by AIP Publishing.
T2  - Journal of Applied Physics
T1  - Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse
VL  - 122
IS  - 22
DO  - 10.1063/1.5016548
ER  - 

@article{
author = "Gaković, Biljana M. and Tsibidis, George D. and Skoulas, Evangelos and Petrović, Suzana and Vasić, Borislav Z. and Stratakis, Emmanuel",
year = "2017",
abstract = "The interaction of ultra-short laser pulses with Titanium/Aluminium (Ti/Al) nano-layered thin film was investigated. The sample composed of alternating Ti and Al layers of a few nanometres thick was deposited by ion-sputtering. A single pulse irradiation experiment was conducted in an ambient air environment using focused and linearly polarized femtosecond laser pulses for the investigation of the ablation effects. The laser induced morphological changes and the composition were characterized using several microscopy techniques and energy dispersive X-ray spectroscopy. The following results were obtained: (i) at low values of pulse energy/fluence, ablation of the upper Ti layer only was observed; (ii) at higher laser fluence, a two-step ablation of Ti and Al layers takes place, followed by partial removal of the nano-layered film. The experimental observations were supported by a theoretical model accounting for the thermal response of the multiple layered structure upon irradiation with ultra-short laser pulses. Published by AIP Publishing.",
journal = "Journal of Applied Physics",
title = "Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse",
volume = "122",
number = "22",
doi = "10.1063/1.5016548"
}

Gaković, B. M., Tsibidis, G. D., Skoulas, E., Petrović, S., Vasić, B. Z.,& Stratakis, E.. (2017). Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse. in Journal of Applied Physics, 122(22).
https://doi.org/10.1063/1.5016548

Gaković BM, Tsibidis GD, Skoulas E, Petrović S, Vasić BZ, Stratakis E. Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse. in Journal of Applied Physics. 2017;122(22).
doi:10.1063/1.5016548 .

Gaković, Biljana M., Tsibidis, George D., Skoulas, Evangelos, Petrović, Suzana, Vasić, Borislav Z., Stratakis, Emmanuel, "Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse" in Journal of Applied Physics, 122, no. 22 (2017),
https://doi.org/10.1063/1.5016548 . .

TY  - JOUR
AU  - Kovačević, Aleksander
AU  - Petrović, Suzana
AU  - Bokic, Bojana
AU  - Gaković, Biljana M.
AU  - Bokorov, Milos T.
AU  - Vasić, Borislav Z.
AU  - Gajic, Rados
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/323
AB  - The effects of UV femtosecond laser beam with 76 MHz repetition rate on two types of thin films on Si substrate - the Al single layer thin film, and the multilayered thin film consisted of five Al/Ti bilayers (total thickness 130 nm) - were studied. The surface modification of the target was done by low fluences and different irradiation times, not exceeding similar to 300s. Nanopatterns in the form of femtosecond-laser induced periodic surface structures (fs-LIPSS) with periodicity of LT 315 nm and height of 45 nm were registered upon irradiation of the thin films. It was shown that: (i) the fs-LIPSS evolve from ruffles similar to high spatial frequency LIPSS (HSFL) into a low spatial frequency LIPSS (LSFL) if a certain threshold of the fluence is met, (ii) the number of LSFL increases with the exposition time and (iii) the LSFL remain stable even after long exposure times. We achieved high-quality highly-controllable fabrication of periodic structures on the surface of nanosized multilayer films with high-repetition-rate low-fluence femtosecond laser pulses. Compared to the Al single layer, the presence of the Ti underlayer in the Al/Ti multilayer thin film enabled more efficient heat transmittance through the Al/Ti interface away from the interaction zone which caused the reduction of the ablation effects leading to the formation of more regular LIPSS. The different outcomes of interactions with multi and single layer thin films lead to the conclusion that the behavior of the LIPSS is due to thin film structure. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam
VL  - 326
SP  - 91
EP  - 98
DO  - 10.1016/j.apsusc.2014.10.180
ER  - 

@article{
author = "Kovačević, Aleksander and Petrović, Suzana and Bokic, Bojana and Gaković, Biljana M. and Bokorov, Milos T. and Vasić, Borislav Z. and Gajic, Rados and Trtica, Milan and Jelenković, Branislav",
year = "2015",
abstract = "The effects of UV femtosecond laser beam with 76 MHz repetition rate on two types of thin films on Si substrate - the Al single layer thin film, and the multilayered thin film consisted of five Al/Ti bilayers (total thickness 130 nm) - were studied. The surface modification of the target was done by low fluences and different irradiation times, not exceeding similar to 300s. Nanopatterns in the form of femtosecond-laser induced periodic surface structures (fs-LIPSS) with periodicity of LT 315 nm and height of 45 nm were registered upon irradiation of the thin films. It was shown that: (i) the fs-LIPSS evolve from ruffles similar to high spatial frequency LIPSS (HSFL) into a low spatial frequency LIPSS (LSFL) if a certain threshold of the fluence is met, (ii) the number of LSFL increases with the exposition time and (iii) the LSFL remain stable even after long exposure times. We achieved high-quality highly-controllable fabrication of periodic structures on the surface of nanosized multilayer films with high-repetition-rate low-fluence femtosecond laser pulses. Compared to the Al single layer, the presence of the Ti underlayer in the Al/Ti multilayer thin film enabled more efficient heat transmittance through the Al/Ti interface away from the interaction zone which caused the reduction of the ablation effects leading to the formation of more regular LIPSS. The different outcomes of interactions with multi and single layer thin films lead to the conclusion that the behavior of the LIPSS is due to thin film structure. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam",
volume = "326",
pages = "91-98",
doi = "10.1016/j.apsusc.2014.10.180"
}

Kovačević, A., Petrović, S., Bokic, B., Gaković, B. M., Bokorov, M. T., Vasić, B. Z., Gajic, R., Trtica, M.,& Jelenković, B.. (2015). Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam. in Applied Surface Science, 326, 91-98.
https://doi.org/10.1016/j.apsusc.2014.10.180

Kovačević A, Petrović S, Bokic B, Gaković BM, Bokorov MT, Vasić BZ, Gajic R, Trtica M, Jelenković B. Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam. in Applied Surface Science. 2015;326:91-98.
doi:10.1016/j.apsusc.2014.10.180 .

Kovačević, Aleksander, Petrović, Suzana, Bokic, Bojana, Gaković, Biljana M., Bokorov, Milos T., Vasić, Borislav Z., Gajic, Rados, Trtica, Milan, Jelenković, Branislav, "Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam" in Applied Surface Science, 326 (2015):91-98,
https://doi.org/10.1016/j.apsusc.2014.10.180 . .