TY  - JOUR
AU  - Matić, Ivana Z.
AU  - Mraković, Ana
AU  - Rakočević, Zlatko
AU  - Stoiljković, Milovan
AU  - Pavlović, Vladimir B.
AU  - Momić, Tatjana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11544
AB  - Background: Although luteolin has been confirmed as potent anticancer agent, its potential application as therapeutic is limited by its water solubility. To overcome this shortcoming nanoparticle technology approach was applied. Owing to their proven low toxicity and the possibility to be easily functionalized gold nanoparticles (AuNP) were the nanosystem of choice used in this study. Novel luteolin capped gold nanoparticles (AuNPL) were synthesized and their anticancer effect towards human cervical adenocarcinoma HeLa cells was investigated in vitro. Methods: AuNPL were synthesized by reducing chloroauric acid by trisodium citrate with subsequent addition of luteoline during synthesis and their physicochemical characterization was done. AuNPL cytotoxicity against HeLa, human malignant melanoma A375, and normal human keratinocytes HaCaT cells was tested by MTT cell survival assay, and their IC50 values were determined. The capability of AuNPL to induce cell cycle arrest and apoptosis in HeLa cells were demonstrated by flow cytometry. The antioxidant activity of AuNPL was assessed by DPPH⋅ and ABTS⋅þ scavenging assays. Cytoprotective properties of AuNPL towards HaCaT cells were examined by measuring the physiological and H2O2 induced intracellular reactive oxygen species (ROS) levels using flow cytometry. Also, genotoxicity of AuNPL in HaCaT cells was investigated by the single cell alkaline comet assay. Results: Spherical AuNPL, stable in aqueous solution up to six months at 4 ◦C were obtained in the synthesis. The selectivity in the cytotoxic action of AuNPL on HeLa and A375 cancer cells compared with their cytotoxicity on normal keratinocytes HaCaT was observed. AuNPL exerted their cytotoxic activity against HeLa cells through accumulation of the cells in the subG1 phase of the cell cycle, inducing the apoptotic cell death mediated by the activation of caspase-3 − 8, and − 9. AuNPL antioxidative potential was confirmed by DPPH⋅ and ABTS⋅þ scavenging assays. IC50 concentration of AuNPL exerted cytoprotective effect against HaCaT cells by the significant reduction of the physiological intracellular ROS level. Additionally, AuNPL were shown as more cytoprotective towards HaCaT cells then luteolin due to the more successful elimination of H2O2 induced intracellular ROS. Moreover, nontoxic concentrations of AuNPL did not cause considerable DNA damage of HaCaT cells, indicating low genotoxicity of the nanoparticles.
T2  - Journal of Trace Elements in Medicine and Biology
T1  - Anticancer effect of novel luteolin capped gold nanoparticles selectively cytotoxic towards human cervical adenocarcinoma HeLa cells: An in vitro approach
VL  - 80
SP  - 127286
DO  - 10.1016/j.jtemb.2023.127286
ER  - 

@article{
author = "Matić, Ivana Z. and Mraković, Ana and Rakočević, Zlatko and Stoiljković, Milovan and Pavlović, Vladimir B. and Momić, Tatjana",
year = "2023",
abstract = "Background: Although luteolin has been confirmed as potent anticancer agent, its potential application as therapeutic is limited by its water solubility. To overcome this shortcoming nanoparticle technology approach was applied. Owing to their proven low toxicity and the possibility to be easily functionalized gold nanoparticles (AuNP) were the nanosystem of choice used in this study. Novel luteolin capped gold nanoparticles (AuNPL) were synthesized and their anticancer effect towards human cervical adenocarcinoma HeLa cells was investigated in vitro. Methods: AuNPL were synthesized by reducing chloroauric acid by trisodium citrate with subsequent addition of luteoline during synthesis and their physicochemical characterization was done. AuNPL cytotoxicity against HeLa, human malignant melanoma A375, and normal human keratinocytes HaCaT cells was tested by MTT cell survival assay, and their IC50 values were determined. The capability of AuNPL to induce cell cycle arrest and apoptosis in HeLa cells were demonstrated by flow cytometry. The antioxidant activity of AuNPL was assessed by DPPH⋅ and ABTS⋅þ scavenging assays. Cytoprotective properties of AuNPL towards HaCaT cells were examined by measuring the physiological and H2O2 induced intracellular reactive oxygen species (ROS) levels using flow cytometry. Also, genotoxicity of AuNPL in HaCaT cells was investigated by the single cell alkaline comet assay. Results: Spherical AuNPL, stable in aqueous solution up to six months at 4 ◦C were obtained in the synthesis. The selectivity in the cytotoxic action of AuNPL on HeLa and A375 cancer cells compared with their cytotoxicity on normal keratinocytes HaCaT was observed. AuNPL exerted their cytotoxic activity against HeLa cells through accumulation of the cells in the subG1 phase of the cell cycle, inducing the apoptotic cell death mediated by the activation of caspase-3 − 8, and − 9. AuNPL antioxidative potential was confirmed by DPPH⋅ and ABTS⋅þ scavenging assays. IC50 concentration of AuNPL exerted cytoprotective effect against HaCaT cells by the significant reduction of the physiological intracellular ROS level. Additionally, AuNPL were shown as more cytoprotective towards HaCaT cells then luteolin due to the more successful elimination of H2O2 induced intracellular ROS. Moreover, nontoxic concentrations of AuNPL did not cause considerable DNA damage of HaCaT cells, indicating low genotoxicity of the nanoparticles.",
journal = "Journal of Trace Elements in Medicine and Biology",
title = "Anticancer effect of novel luteolin capped gold nanoparticles selectively cytotoxic towards human cervical adenocarcinoma HeLa cells: An in vitro approach",
volume = "80",
pages = "127286",
doi = "10.1016/j.jtemb.2023.127286"
}

Matić, I. Z., Mraković, A., Rakočević, Z., Stoiljković, M., Pavlović, V. B.,& Momić, T.. (2023). Anticancer effect of novel luteolin capped gold nanoparticles selectively cytotoxic towards human cervical adenocarcinoma HeLa cells: An in vitro approach. in Journal of Trace Elements in Medicine and Biology, 80, 127286.
https://doi.org/10.1016/j.jtemb.2023.127286

Matić IZ, Mraković A, Rakočević Z, Stoiljković M, Pavlović VB, Momić T. Anticancer effect of novel luteolin capped gold nanoparticles selectively cytotoxic towards human cervical adenocarcinoma HeLa cells: An in vitro approach. in Journal of Trace Elements in Medicine and Biology. 2023;80:127286.
doi:10.1016/j.jtemb.2023.127286 .

Matić, Ivana Z., Mraković, Ana, Rakočević, Zlatko, Stoiljković, Milovan, Pavlović, Vladimir B., Momić, Tatjana, "Anticancer effect of novel luteolin capped gold nanoparticles selectively cytotoxic towards human cervical adenocarcinoma HeLa cells: An in vitro approach" in Journal of Trace Elements in Medicine and Biology, 80 (2023):127286,
https://doi.org/10.1016/j.jtemb.2023.127286 . .

TY  - JOUR
AU  - Potočnik, Jelena
AU  - Popović, Maja
AU  - Mitrić, Miodrag
AU  - Rakočević, Zlatko Lj.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9753
AB  - In this work we deposited nickel thin films by Glancing Angle Deposition at two different angles (65 degrees and 85 degrees) onto glass substrates. The structure of the films, thicknesses between 50 and 200 nm, was studied by scanning electron microscopy, atomic force microscopy and X-ray diffraction, while the chemical properties were analyzed using X-ray photoelectron spectroscopy. According to the obtained results it can be seen that the deposition angle has influence on porosity, crystallinity and surface roughness. Optical properties were investigated by spectroscopic ellipsometry and electrical properties were measured by four point probe. Spectroscopic ellipsometry revealed that the refractive index and extinction coefficient varied with thickness and deposition angle, which can be correlated with changes in microstructure and porosity of Ni films. The observed variations in resistivity could be attributed to the changes in the width of the columns, as well as to the amount of oxide present in the samples.
T2  - Optical Materials
T1  - Control of porosity and optical properties of slanted columnar Ni thin films
VL  - 111
SP  - 110649
DO  - 10.1016/j.optmat.2020.110649
ER  - 

@article{
author = "Potočnik, Jelena and Popović, Maja and Mitrić, Miodrag and Rakočević, Zlatko Lj.",
year = "2021",
abstract = "In this work we deposited nickel thin films by Glancing Angle Deposition at two different angles (65 degrees and 85 degrees) onto glass substrates. The structure of the films, thicknesses between 50 and 200 nm, was studied by scanning electron microscopy, atomic force microscopy and X-ray diffraction, while the chemical properties were analyzed using X-ray photoelectron spectroscopy. According to the obtained results it can be seen that the deposition angle has influence on porosity, crystallinity and surface roughness. Optical properties were investigated by spectroscopic ellipsometry and electrical properties were measured by four point probe. Spectroscopic ellipsometry revealed that the refractive index and extinction coefficient varied with thickness and deposition angle, which can be correlated with changes in microstructure and porosity of Ni films. The observed variations in resistivity could be attributed to the changes in the width of the columns, as well as to the amount of oxide present in the samples.",
journal = "Optical Materials",
title = "Control of porosity and optical properties of slanted columnar Ni thin films",
volume = "111",
pages = "110649",
doi = "10.1016/j.optmat.2020.110649"
}

Potočnik, J., Popović, M., Mitrić, M.,& Rakočević, Z. Lj.. (2021). Control of porosity and optical properties of slanted columnar Ni thin films. in Optical Materials, 111, 110649.
https://doi.org/10.1016/j.optmat.2020.110649

Potočnik J, Popović M, Mitrić M, Rakočević ZL. Control of porosity and optical properties of slanted columnar Ni thin films. in Optical Materials. 2021;111:110649.
doi:10.1016/j.optmat.2020.110649 .

Potočnik, Jelena, Popović, Maja, Mitrić, Miodrag, Rakočević, Zlatko Lj., "Control of porosity and optical properties of slanted columnar Ni thin films" in Optical Materials, 111 (2021):110649,
https://doi.org/10.1016/j.optmat.2020.110649 . .

TY  - JOUR
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Noga, Pavol
AU  - Vaňa, Dušan
AU  - Rakočević, Zlatko Lj.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8929
AB  - Au-Ag alloy nanoparticles were formed into amorphous silicon by sequential ion implantation of Au and Ag. Monocrystalline Si was amorphized at the initial moment of implantation with 1 × 1016 ions/cm2 gold ions, and then different silver fluences were applied in the range of 1 × 1016–1 × 1017 ions/cm2. After implantations the samples were investigated by means of Rutherford backscattering spectrometry and transmission electron microscopy. The nanoparticles were found to be formed at surface and sub-surface regions of the Si substrate, at depths corresponding to the maximum distribution of Au and Ag ions. The particles are crystalline in nature with sizes from 2 nm to 30 nm in diameter, increasing with silver ion fluence. Although the lattice constants of gold and silver are too close to be distinguished by measuring the characteristic interplanar spacings, imaging in scanning transmission mode confirms the formation of Au-Ag bimetallic nanoparticles, presenting a solid-solution alloy of gold and silver.
T2  - Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
T1  - Formation of Au-Ag alloy nanoparticles in amorphous silicon using sequential ion implantation
VL  - 471
SP  - 33
EP  - 41
DO  - 10.1016/j.nimb.2020.03.021
ER  - 

@article{
author = "Novaković, Mirjana M. and Popović, Maja and Noga, Pavol and Vaňa, Dušan and Rakočević, Zlatko Lj.",
year = "2020",
abstract = "Au-Ag alloy nanoparticles were formed into amorphous silicon by sequential ion implantation of Au and Ag. Monocrystalline Si was amorphized at the initial moment of implantation with 1 × 1016 ions/cm2 gold ions, and then different silver fluences were applied in the range of 1 × 1016–1 × 1017 ions/cm2. After implantations the samples were investigated by means of Rutherford backscattering spectrometry and transmission electron microscopy. The nanoparticles were found to be formed at surface and sub-surface regions of the Si substrate, at depths corresponding to the maximum distribution of Au and Ag ions. The particles are crystalline in nature with sizes from 2 nm to 30 nm in diameter, increasing with silver ion fluence. Although the lattice constants of gold and silver are too close to be distinguished by measuring the characteristic interplanar spacings, imaging in scanning transmission mode confirms the formation of Au-Ag bimetallic nanoparticles, presenting a solid-solution alloy of gold and silver.",
journal = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms",
title = "Formation of Au-Ag alloy nanoparticles in amorphous silicon using sequential ion implantation",
volume = "471",
pages = "33-41",
doi = "10.1016/j.nimb.2020.03.021"
}

Novaković, M. M., Popović, M., Noga, P., Vaňa, D.,& Rakočević, Z. Lj.. (2020). Formation of Au-Ag alloy nanoparticles in amorphous silicon using sequential ion implantation. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 471, 33-41.
https://doi.org/10.1016/j.nimb.2020.03.021

Novaković MM, Popović M, Noga P, Vaňa D, Rakočević ZL. Formation of Au-Ag alloy nanoparticles in amorphous silicon using sequential ion implantation. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2020;471:33-41.
doi:10.1016/j.nimb.2020.03.021 .

Novaković, Mirjana M., Popović, Maja, Noga, Pavol, Vaňa, Dušan, Rakočević, Zlatko Lj., "Formation of Au-Ag alloy nanoparticles in amorphous silicon using sequential ion implantation" in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 471 (2020):33-41,
https://doi.org/10.1016/j.nimb.2020.03.021 . .

TY  - JOUR
AU  - Šojić Merkulov, Daniela V.
AU  - Lazarević, Marina J.
AU  - Đorđević, Aleksandar N.
AU  - Náfrádi, Máté
AU  - Alapi, Tünde
AU  - Putnik, Predrag
AU  - Rakočević, Zlatko Lj.
AU  - Novaković, Mirjana M.
AU  - Miljević, Bojan
AU  - Bognár, Szabolcs
AU  - Abramović, Biljana F.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9588
AB  - Nowadays, great focus is given to the contamination of surface and groundwater because of the extensive usage of pesticides in agriculture. The improvements of commercial catalyst TiO2 activity using different Au nanoparticles were investigated for mesotrione photocatalytic degradation under simulated sunlight. The selected system was 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) that was studied by transmission electron microscopy and ultraviolet-visible (UV-Vis) spectroscopy. It was found that TiO2 particles size was ~20 nm and ~50 nm, respectively. The Au nanoparticles were below 10 nm and were well distributed within the framework of TiO2 . For 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L), band gap energy was 2.45 eV. In comparison to the pure TiO2, addition of Au nanoparticles generally enhanced photocatalytic removal of mesotrione. By examining the degree of mineralization, it was found that 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) system was the most efficient for the removal of the mesotrione and intermediates. The effect of tert-butanol, NaF and ethylenediaminetetraacetic acid disodium salt on the transformation rate suggested that the relative contribution of various reactive species changed in following order: h+ >•OHads >•OHbulk. Finally, several intermediates that were formed during the photocatalytic treatment of mesotrione were identified. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
T2  - Nanomaterials
T1  - Potential of TiO2 with various au nanoparticles for catalyzing mesotrione removal from wastewaters under sunlight
VL  - 10
IS  - 8
SP  - 1
EP  - 15
DO  - 10.3390/nano10081591
ER  - 

@article{
author = "Šojić Merkulov, Daniela V. and Lazarević, Marina J. and Đorđević, Aleksandar N. and Náfrádi, Máté and Alapi, Tünde and Putnik, Predrag and Rakočević, Zlatko Lj. and Novaković, Mirjana M. and Miljević, Bojan and Bognár, Szabolcs and Abramović, Biljana F.",
year = "2020",
abstract = "Nowadays, great focus is given to the contamination of surface and groundwater because of the extensive usage of pesticides in agriculture. The improvements of commercial catalyst TiO2 activity using different Au nanoparticles were investigated for mesotrione photocatalytic degradation under simulated sunlight. The selected system was 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) that was studied by transmission electron microscopy and ultraviolet-visible (UV-Vis) spectroscopy. It was found that TiO2 particles size was ~20 nm and ~50 nm, respectively. The Au nanoparticles were below 10 nm and were well distributed within the framework of TiO2 . For 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L), band gap energy was 2.45 eV. In comparison to the pure TiO2, addition of Au nanoparticles generally enhanced photocatalytic removal of mesotrione. By examining the degree of mineralization, it was found that 2.43 × 10−3% Au–S–CH2–CH2–OH/TiO2 (0.5 g/L) system was the most efficient for the removal of the mesotrione and intermediates. The effect of tert-butanol, NaF and ethylenediaminetetraacetic acid disodium salt on the transformation rate suggested that the relative contribution of various reactive species changed in following order: h+ >•OHads >•OHbulk. Finally, several intermediates that were formed during the photocatalytic treatment of mesotrione were identified. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.",
journal = "Nanomaterials",
title = "Potential of TiO2 with various au nanoparticles for catalyzing mesotrione removal from wastewaters under sunlight",
volume = "10",
number = "8",
pages = "1-15",
doi = "10.3390/nano10081591"
}

Šojić Merkulov, D. V., Lazarević, M. J., Đorđević, A. N., Náfrádi, M., Alapi, T., Putnik, P., Rakočević, Z. Lj., Novaković, M. M., Miljević, B., Bognár, S.,& Abramović, B. F.. (2020). Potential of TiO2 with various au nanoparticles for catalyzing mesotrione removal from wastewaters under sunlight. in Nanomaterials, 10(8), 1-15.
https://doi.org/10.3390/nano10081591

Šojić Merkulov DV, Lazarević MJ, Đorđević AN, Náfrádi M, Alapi T, Putnik P, Rakočević ZL, Novaković MM, Miljević B, Bognár S, Abramović BF. Potential of TiO2 with various au nanoparticles for catalyzing mesotrione removal from wastewaters under sunlight. in Nanomaterials. 2020;10(8):1-15.
doi:10.3390/nano10081591 .

Šojić Merkulov, Daniela V., Lazarević, Marina J., Đorđević, Aleksandar N., Náfrádi, Máté, Alapi, Tünde, Putnik, Predrag, Rakočević, Zlatko Lj., Novaković, Mirjana M., Miljević, Bojan, Bognár, Szabolcs, Abramović, Biljana F., "Potential of TiO2 with various au nanoparticles for catalyzing mesotrione removal from wastewaters under sunlight" in Nanomaterials, 10, no. 8 (2020):1-15,
https://doi.org/10.3390/nano10081591 . .

TY  - JOUR
AU  - Popović, Maja
AU  - Novaković, Mirjana M.
AU  - Noga, Pavol
AU  - Vaňa, Dušan
AU  - Rakočević, Zlatko Lj.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9589
AB  - Formation of Au-Ag alloy nanoparticles in TiN thin films is demonstrated through sequential implantation of Au and Ag ions. The irradiations were done with 200 keV Au ions at fluence of 1.0 × 1016 ions/cm2 and 150 keV Ag ions to the fluences in the range of 0.7–1.3 × 1017 ions/cm2. It was found that irradiations introduce around 1.5 at.% of gold and up to ~20 at.% of silver species causing also the significant sputtering of the surface. TiN surface besides the topographic undergoes chemical changes. The presence of silver and gold is confirmed by photoemission spectroscopy showing that the implanted ions did not form any kind of compound with the surrounding matrix. Electron microscopy evidenced the formation of crystalline and quasi-spherical particles with dimensions below 10 nm. Elemental analysis revealed that the obtained nanoparticles present Au-Ag alloys, with two elements mixed over the whole volume of the particles in different Au:Ag ratios. © 2020 Elsevier B.V.
T2  - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
T1  - Ion beam synthesis of Au-Ag alloy nanoparticles in TiN thin films
VL  - 475
SP  - 20
EP  - 27
DO  - 10.1016/j.nimb.2020.04.032
ER  - 

@article{
author = "Popović, Maja and Novaković, Mirjana M. and Noga, Pavol and Vaňa, Dušan and Rakočević, Zlatko Lj.",
year = "2020",
abstract = "Formation of Au-Ag alloy nanoparticles in TiN thin films is demonstrated through sequential implantation of Au and Ag ions. The irradiations were done with 200 keV Au ions at fluence of 1.0 × 1016 ions/cm2 and 150 keV Ag ions to the fluences in the range of 0.7–1.3 × 1017 ions/cm2. It was found that irradiations introduce around 1.5 at.% of gold and up to ~20 at.% of silver species causing also the significant sputtering of the surface. TiN surface besides the topographic undergoes chemical changes. The presence of silver and gold is confirmed by photoemission spectroscopy showing that the implanted ions did not form any kind of compound with the surrounding matrix. Electron microscopy evidenced the formation of crystalline and quasi-spherical particles with dimensions below 10 nm. Elemental analysis revealed that the obtained nanoparticles present Au-Ag alloys, with two elements mixed over the whole volume of the particles in different Au:Ag ratios. © 2020 Elsevier B.V.",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
title = "Ion beam synthesis of Au-Ag alloy nanoparticles in TiN thin films",
volume = "475",
pages = "20-27",
doi = "10.1016/j.nimb.2020.04.032"
}

Popović, M., Novaković, M. M., Noga, P., Vaňa, D.,& Rakočević, Z. Lj.. (2020). Ion beam synthesis of Au-Ag alloy nanoparticles in TiN thin films. in Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 475, 20-27.
https://doi.org/10.1016/j.nimb.2020.04.032

Popović M, Novaković MM, Noga P, Vaňa D, Rakočević ZL. Ion beam synthesis of Au-Ag alloy nanoparticles in TiN thin films. in Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 2020;475:20-27.
doi:10.1016/j.nimb.2020.04.032 .

Popović, Maja, Novaković, Mirjana M., Noga, Pavol, Vaňa, Dušan, Rakočević, Zlatko Lj., "Ion beam synthesis of Au-Ag alloy nanoparticles in TiN thin films" in Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 475 (2020):20-27,
https://doi.org/10.1016/j.nimb.2020.04.032 . .

TY  - JOUR
AU  - Kisić, Danilo
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Novaković, Mirjana M.
AU  - Noga, Pavol
AU  - Vaňa, Dušan
AU  - Závacká, Anna
AU  - Rakočević, Zlatko Lj.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8587
AB  - Fe/Polyethylene nanocomposite was synthesized by ion beam implantation of 56Fe+ into bulk high-density polyethylene. Nanoscale surface morphology along with magnetic and optical behavior was investigated. The aim of the research was to investigate changes of polyethylene's surface layer morphology with the change of Fe implantation fluence in the high fluence range and to find correlations with the magnetic and optical behavior. Four implantation fluences were applied: 5 × 1016, 1 × 1017, 2 × 1017 and 5 × 1017 cm−2, while the implantation energy was 95 keV. Concentration profiles of implanted Fe were analyzed by Rutherford backscattering spectrometry, showing Fe concentration profile maxima closer to the surface with increasing implantation fluence. Cross-sectional transmission electron microscopy showed the formation of metallic nanoparticles with sizes in a range from below 1 nm up to few tens of nanometers, depending on the fluence, and for the highest implantation fluence, a continuous layer was formed. Magneto-optic Kerr effect magnetometry demonstrates weak ferromagnetic behavior for the 2 higher fluences, and superparamagnetic for the 2 lower fluences. The UV-VIS remission function spectra show the peak in the UV region, which we attribute to iron nanoparticles.
T2  - Vacuum
T1  - Surface layer morphology of the high fluence Fe implanted polyethylene - Correlation with the magnetic and optical behavior
VL  - 171
SP  - 109016
DO  - 10.1016/j.vacuum.2019.109016
ER  - 

@article{
author = "Kisić, Danilo and Nenadović, Miloš and Potočnik, Jelena and Novaković, Mirjana M. and Noga, Pavol and Vaňa, Dušan and Závacká, Anna and Rakočević, Zlatko Lj.",
year = "2020",
abstract = "Fe/Polyethylene nanocomposite was synthesized by ion beam implantation of 56Fe+ into bulk high-density polyethylene. Nanoscale surface morphology along with magnetic and optical behavior was investigated. The aim of the research was to investigate changes of polyethylene's surface layer morphology with the change of Fe implantation fluence in the high fluence range and to find correlations with the magnetic and optical behavior. Four implantation fluences were applied: 5 × 1016, 1 × 1017, 2 × 1017 and 5 × 1017 cm−2, while the implantation energy was 95 keV. Concentration profiles of implanted Fe were analyzed by Rutherford backscattering spectrometry, showing Fe concentration profile maxima closer to the surface with increasing implantation fluence. Cross-sectional transmission electron microscopy showed the formation of metallic nanoparticles with sizes in a range from below 1 nm up to few tens of nanometers, depending on the fluence, and for the highest implantation fluence, a continuous layer was formed. Magneto-optic Kerr effect magnetometry demonstrates weak ferromagnetic behavior for the 2 higher fluences, and superparamagnetic for the 2 lower fluences. The UV-VIS remission function spectra show the peak in the UV region, which we attribute to iron nanoparticles.",
journal = "Vacuum",
title = "Surface layer morphology of the high fluence Fe implanted polyethylene - Correlation with the magnetic and optical behavior",
volume = "171",
pages = "109016",
doi = "10.1016/j.vacuum.2019.109016"
}

Kisić, D., Nenadović, M., Potočnik, J., Novaković, M. M., Noga, P., Vaňa, D., Závacká, A.,& Rakočević, Z. Lj.. (2020). Surface layer morphology of the high fluence Fe implanted polyethylene - Correlation with the magnetic and optical behavior. in Vacuum, 171, 109016.
https://doi.org/10.1016/j.vacuum.2019.109016

Kisić D, Nenadović M, Potočnik J, Novaković MM, Noga P, Vaňa D, Závacká A, Rakočević ZL. Surface layer morphology of the high fluence Fe implanted polyethylene - Correlation with the magnetic and optical behavior. in Vacuum. 2020;171:109016.
doi:10.1016/j.vacuum.2019.109016 .

Kisić, Danilo, Nenadović, Miloš, Potočnik, Jelena, Novaković, Mirjana M., Noga, Pavol, Vaňa, Dušan, Závacká, Anna, Rakočević, Zlatko Lj., "Surface layer morphology of the high fluence Fe implanted polyethylene - Correlation with the magnetic and optical behavior" in Vacuum, 171 (2020):109016,
https://doi.org/10.1016/j.vacuum.2019.109016 . .

TY  - JOUR
AU  - Aguincha, R.
AU  - Bundaleski, Nenad
AU  - Bundaleska, N
AU  - Novaković, Mirjana M.
AU  - Henriques, Julio A. P.
AU  - Rakočević, Zlatko Lj.
AU  - Tatarova, Elena
AU  - Teodoro, Orlando M. N. D.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8616
AB  - Stainless steel and copper technical substrates have been coated by free standing graphene using electrophoretic deposition technique, with the final goal to obtain chemically inert low secondary electron emission surfaces. This class of materials is of utmost interest in future accelerators in order to increase further the flux of accelerated charged particles in the beam. The measured maximum total electron yield of pristine graphene, which has been previously characterized by electron microscopies and X-ray photoelectron spectroscopy, appears to be about 1.0. The deposition parameters have been optimized in order to obtain surfaces with lowest total electron yield, but also composition and morphology close to that of pristine graphene. When applying these optimized deposition parameters graphene coatings on two substrates, i.e. stainless steel and copper, the maximum total electron yield of about 1.04 was obtained. The composition of coatings and the relative amounts of sp2 bonds are slightly worse than those of the pristine graphene, while the surface morphology appears to be the same. Annealing at 150 °C for 64 h in high vacuum, showed that vacuum baking did not affect considerably the electron emission properties of the coatings. © 2019 Elsevier B.V.
T2  - Applied Surface Science
T1  - Low total electron yield graphene coatings produced by electrophoretic deposition
VL  - 504
SP  - 143870
DO  - 10.1016/j.apsusc.2019.143870
ER  - 

@article{
author = "Aguincha, R. and Bundaleski, Nenad and Bundaleska, N and Novaković, Mirjana M. and Henriques, Julio A. P. and Rakočević, Zlatko Lj. and Tatarova, Elena and Teodoro, Orlando M. N. D.",
year = "2020",
abstract = "Stainless steel and copper technical substrates have been coated by free standing graphene using electrophoretic deposition technique, with the final goal to obtain chemically inert low secondary electron emission surfaces. This class of materials is of utmost interest in future accelerators in order to increase further the flux of accelerated charged particles in the beam. The measured maximum total electron yield of pristine graphene, which has been previously characterized by electron microscopies and X-ray photoelectron spectroscopy, appears to be about 1.0. The deposition parameters have been optimized in order to obtain surfaces with lowest total electron yield, but also composition and morphology close to that of pristine graphene. When applying these optimized deposition parameters graphene coatings on two substrates, i.e. stainless steel and copper, the maximum total electron yield of about 1.04 was obtained. The composition of coatings and the relative amounts of sp2 bonds are slightly worse than those of the pristine graphene, while the surface morphology appears to be the same. Annealing at 150 °C for 64 h in high vacuum, showed that vacuum baking did not affect considerably the electron emission properties of the coatings. © 2019 Elsevier B.V.",
journal = "Applied Surface Science",
title = "Low total electron yield graphene coatings produced by electrophoretic deposition",
volume = "504",
pages = "143870",
doi = "10.1016/j.apsusc.2019.143870"
}

Aguincha, R., Bundaleski, N., Bundaleska, N., Novaković, M. M., Henriques, J. A. P., Rakočević, Z. Lj., Tatarova, E.,& Teodoro, O. M. N. D.. (2020). Low total electron yield graphene coatings produced by electrophoretic deposition. in Applied Surface Science, 504, 143870.
https://doi.org/10.1016/j.apsusc.2019.143870

Aguincha R, Bundaleski N, Bundaleska N, Novaković MM, Henriques JAP, Rakočević ZL, Tatarova E, Teodoro OMND. Low total electron yield graphene coatings produced by electrophoretic deposition. in Applied Surface Science. 2020;504:143870.
doi:10.1016/j.apsusc.2019.143870 .

Aguincha, R., Bundaleski, Nenad, Bundaleska, N, Novaković, Mirjana M., Henriques, Julio A. P., Rakočević, Zlatko Lj., Tatarova, Elena, Teodoro, Orlando M. N. D., "Low total electron yield graphene coatings produced by electrophoretic deposition" in Applied Surface Science, 504 (2020):143870,
https://doi.org/10.1016/j.apsusc.2019.143870 . .

TY  - JOUR
AU  - Petković, Marijana
AU  - Leopold, Jenny
AU  - Popović, Iva A.
AU  - Dimić, Dušan
AU  - Ilić, Jelica
AU  - Nenadović, Miloš
AU  - Rakočević, Zlatko Lj.
AU  - Schiller, Jürgen
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8623
AB  - In this work, the performances of two ionic liquid matrices (ILMs) with the same ammonium counterpart for mass spectrometric analysis of the insoluble and soluble sucralfate were compared. Matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) was performed assisted by the butylammonium salts of α-cyano-hydroxycinnamic acid (CHCAB) and 2,5-dihydroxybenzoic acid (DHBB). CHCAB has a higher IE than DHBB, but better optical properties. CHCAB is more suitable for the analysis of sucralfate, although molecular ions of both compounds were detectable only with low intensities. Thus, optical properties of ILMs are crucial to enhance the sensitivity of MALDI MS detection of polysulfated oligosaccharides. © 2019, © 2019 Taylor & Francis Group, LLC.
T2  - Journal of Carbohydrate Chemistry
T1  - Performances of ionic liquid matrices with butyl ammonium counterion for matrix-assisted laser desorption/ionization mass spectrometric detection and analysis of sucralfate
VL  - 39
IS  - 1
SP  - 1
EP  - 23
DO  - 10.1080/07328303.2019.1669633
ER  - 

@article{
author = "Petković, Marijana and Leopold, Jenny and Popović, Iva A. and Dimić, Dušan and Ilić, Jelica and Nenadović, Miloš and Rakočević, Zlatko Lj. and Schiller, Jürgen",
year = "2020",
abstract = "In this work, the performances of two ionic liquid matrices (ILMs) with the same ammonium counterpart for mass spectrometric analysis of the insoluble and soluble sucralfate were compared. Matrix-assisted laser desorption/ionization mass spectrometry (MALDI MS) was performed assisted by the butylammonium salts of α-cyano-hydroxycinnamic acid (CHCAB) and 2,5-dihydroxybenzoic acid (DHBB). CHCAB has a higher IE than DHBB, but better optical properties. CHCAB is more suitable for the analysis of sucralfate, although molecular ions of both compounds were detectable only with low intensities. Thus, optical properties of ILMs are crucial to enhance the sensitivity of MALDI MS detection of polysulfated oligosaccharides. © 2019, © 2019 Taylor & Francis Group, LLC.",
journal = "Journal of Carbohydrate Chemistry",
title = "Performances of ionic liquid matrices with butyl ammonium counterion for matrix-assisted laser desorption/ionization mass spectrometric detection and analysis of sucralfate",
volume = "39",
number = "1",
pages = "1-23",
doi = "10.1080/07328303.2019.1669633"
}

Petković, M., Leopold, J., Popović, I. A., Dimić, D., Ilić, J., Nenadović, M., Rakočević, Z. Lj.,& Schiller, J.. (2020). Performances of ionic liquid matrices with butyl ammonium counterion for matrix-assisted laser desorption/ionization mass spectrometric detection and analysis of sucralfate. in Journal of Carbohydrate Chemistry, 39(1), 1-23.
https://doi.org/10.1080/07328303.2019.1669633

Petković M, Leopold J, Popović IA, Dimić D, Ilić J, Nenadović M, Rakočević ZL, Schiller J. Performances of ionic liquid matrices with butyl ammonium counterion for matrix-assisted laser desorption/ionization mass spectrometric detection and analysis of sucralfate. in Journal of Carbohydrate Chemistry. 2020;39(1):1-23.
doi:10.1080/07328303.2019.1669633 .

Petković, Marijana, Leopold, Jenny, Popović, Iva A., Dimić, Dušan, Ilić, Jelica, Nenadović, Miloš, Rakočević, Zlatko Lj., Schiller, Jürgen, "Performances of ionic liquid matrices with butyl ammonium counterion for matrix-assisted laser desorption/ionization mass spectrometric detection and analysis of sucralfate" in Journal of Carbohydrate Chemistry, 39, no. 1 (2020):1-23,
https://doi.org/10.1080/07328303.2019.1669633 . .

TY  - JOUR
AU  - Kisić, Danilo
AU  - Nenadović, Miloš
AU  - Barudžija, Tanja
AU  - Noga, Pavol
AU  - Vaňa, Dušan
AU  - Muška, Martin
AU  - Rakočević, Zlatko Lj.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8646
AB  - In the presented paper, changes of high-density polyethylene's (HDPE) surface properties along with the changes of chemical composition, as a consequence of Fe ion implantation with different fluences, were investigated. Applied implantation fluences were as follows: 5 × 1016, 1 × 1017, 2 × 1017 and 5 × 1017 ions cm−2, while the implantation energy was 95 keV. The samples were analyzed by X-ray photoelectron spectroscopy (XPS), Atomic Force Microscopy (AFM), Four point contact probe, Fourier transform infrared spectroscopy (FTIR) and contact angle measurements. Significant changes in the chemical composition were found by XPS and FTIR, which were followed by changes in surface morphology, increase of roughness, and decrease of sheet resistance that has a percolation threshold that starts for the fluence of 1 × 1017 ions cm−2. Surface free energy increases as a consequence of implantation, up to the fluence of 1 × 1017 ions cm−2, and then decreases for the 2 higher fluences. © 2019 Elsevier B.V.
T2  - Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
T1  - Modification of polyethylene’s surface properties by high fluence Fe implantation
VL  - 462
SP  - 143
EP  - 153
DO  - 10.1016/j.nimb.2019.11.022
ER  - 

@article{
author = "Kisić, Danilo and Nenadović, Miloš and Barudžija, Tanja and Noga, Pavol and Vaňa, Dušan and Muška, Martin and Rakočević, Zlatko Lj.",
year = "2020",
abstract = "In the presented paper, changes of high-density polyethylene's (HDPE) surface properties along with the changes of chemical composition, as a consequence of Fe ion implantation with different fluences, were investigated. Applied implantation fluences were as follows: 5 × 1016, 1 × 1017, 2 × 1017 and 5 × 1017 ions cm−2, while the implantation energy was 95 keV. The samples were analyzed by X-ray photoelectron spectroscopy (XPS), Atomic Force Microscopy (AFM), Four point contact probe, Fourier transform infrared spectroscopy (FTIR) and contact angle measurements. Significant changes in the chemical composition were found by XPS and FTIR, which were followed by changes in surface morphology, increase of roughness, and decrease of sheet resistance that has a percolation threshold that starts for the fluence of 1 × 1017 ions cm−2. Surface free energy increases as a consequence of implantation, up to the fluence of 1 × 1017 ions cm−2, and then decreases for the 2 higher fluences. © 2019 Elsevier B.V.",
journal = "Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms",
title = "Modification of polyethylene’s surface properties by high fluence Fe implantation",
volume = "462",
pages = "143-153",
doi = "10.1016/j.nimb.2019.11.022"
}

Kisić, D., Nenadović, M., Barudžija, T., Noga, P., Vaňa, D., Muška, M.,& Rakočević, Z. Lj.. (2020). Modification of polyethylene’s surface properties by high fluence Fe implantation. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 462, 143-153.
https://doi.org/10.1016/j.nimb.2019.11.022

Kisić D, Nenadović M, Barudžija T, Noga P, Vaňa D, Muška M, Rakočević ZL. Modification of polyethylene’s surface properties by high fluence Fe implantation. in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2020;462:143-153.
doi:10.1016/j.nimb.2019.11.022 .

Kisić, Danilo, Nenadović, Miloš, Barudžija, Tanja, Noga, Pavol, Vaňa, Dušan, Muška, Martin, Rakočević, Zlatko Lj., "Modification of polyethylene’s surface properties by high fluence Fe implantation" in Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 462 (2020):143-153,
https://doi.org/10.1016/j.nimb.2019.11.022 . .

TY  - JOUR
AU  - Medić-Ilić, Mirjana
AU  - Bundaleski, Nenad
AU  - Ivanović, Nenad
AU  - Teodoro, Orlando M. N. D.
AU  - Rakočević, Zlatko Lj.
AU  - Minić, Dragica M.
AU  - Romčević, Nebojša Ž.
AU  - Radisavljević, Ivana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8910
AB  - Recently introduced model for quantitative analysis of in-depth non-uniform surfaces is applied to reexamine the X-ray Photoelectron Spectroscopy (XPS) data of Cd0.99Fe0.01Te0.97Se0.03 and Zn0.98Fe0.02Te0.91Se0.09 crystalline samples. Special attention is paid to the precise identification of phases which form the bulk-like near-surface region and the surface overlayers (the oxide layer and the layer of organic impurities), as well as the influence of surface morphology on the measurements. The obtained results fully support earlier qualitative estimations, but also provide new quantitative insight into the composition of the three investigated regions. The near-surface region of Cd0.99Fe0.01Te0.97Se0.03 and Zn0.98Fe0.02Te0.91Se0.09 samples is slightly electropositive, with cation/anion ratio 52:48 and 53:47, respectively. Model surface structures, which are fully compatible with the experimental results, comprise 0.76 nm thick CdTeO3 layer at the surface of Cd0.99Fe0.01Te0.97Se0.03 and 0.33 nm thick mixed ZnO/TeO2 oxide layer on Zn0.98Fe0.02Te0.91Se0.09. In both samples the oxide layer is only a few atomic layers thick, implying that it suppresses further rapid migration of oxygen into the bulk.
T2  - Vacuum
T1  - XPS measurements of air-exposed Cd(Zn)1xFexTe1ySey surfaces revisited
VL  - 176
SP  - 109340
DO  - 10.1016/j.vacuum.2020.109340
ER  - 

@article{
author = "Medić-Ilić, Mirjana and Bundaleski, Nenad and Ivanović, Nenad and Teodoro, Orlando M. N. D. and Rakočević, Zlatko Lj. and Minić, Dragica M. and Romčević, Nebojša Ž. and Radisavljević, Ivana",
year = "2020",
abstract = "Recently introduced model for quantitative analysis of in-depth non-uniform surfaces is applied to reexamine the X-ray Photoelectron Spectroscopy (XPS) data of Cd0.99Fe0.01Te0.97Se0.03 and Zn0.98Fe0.02Te0.91Se0.09 crystalline samples. Special attention is paid to the precise identification of phases which form the bulk-like near-surface region and the surface overlayers (the oxide layer and the layer of organic impurities), as well as the influence of surface morphology on the measurements. The obtained results fully support earlier qualitative estimations, but also provide new quantitative insight into the composition of the three investigated regions. The near-surface region of Cd0.99Fe0.01Te0.97Se0.03 and Zn0.98Fe0.02Te0.91Se0.09 samples is slightly electropositive, with cation/anion ratio 52:48 and 53:47, respectively. Model surface structures, which are fully compatible with the experimental results, comprise 0.76 nm thick CdTeO3 layer at the surface of Cd0.99Fe0.01Te0.97Se0.03 and 0.33 nm thick mixed ZnO/TeO2 oxide layer on Zn0.98Fe0.02Te0.91Se0.09. In both samples the oxide layer is only a few atomic layers thick, implying that it suppresses further rapid migration of oxygen into the bulk.",
journal = "Vacuum",
title = "XPS measurements of air-exposed Cd(Zn)1xFexTe1ySey surfaces revisited",
volume = "176",
pages = "109340",
doi = "10.1016/j.vacuum.2020.109340"
}

Medić-Ilić, M., Bundaleski, N., Ivanović, N., Teodoro, O. M. N. D., Rakočević, Z. Lj., Minić, D. M., Romčević, N. Ž.,& Radisavljević, I.. (2020). XPS measurements of air-exposed Cd(Zn)1xFexTe1ySey surfaces revisited. in Vacuum, 176, 109340.
https://doi.org/10.1016/j.vacuum.2020.109340

Medić-Ilić M, Bundaleski N, Ivanović N, Teodoro OMND, Rakočević ZL, Minić DM, Romčević NŽ, Radisavljević I. XPS measurements of air-exposed Cd(Zn)1xFexTe1ySey surfaces revisited. in Vacuum. 2020;176:109340.
doi:10.1016/j.vacuum.2020.109340 .

Medić-Ilić, Mirjana, Bundaleski, Nenad, Ivanović, Nenad, Teodoro, Orlando M. N. D., Rakočević, Zlatko Lj., Minić, Dragica M., Romčević, Nebojša Ž., Radisavljević, Ivana, "XPS measurements of air-exposed Cd(Zn)1xFexTe1ySey surfaces revisited" in Vacuum, 176 (2020):109340,
https://doi.org/10.1016/j.vacuum.2020.109340 . .

TY  - JOUR
AU  - Batalović, Katarina
AU  - Radaković, Jana
AU  - Bundaleski, Nenad
AU  - Rakočević, Zlatko Lj.
AU  - Pašti, Igor A.
AU  - Skorodumova, Natalia V.
AU  - Rangel, Carmen Mireya
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9620
AB  - In pursuit of the ideal photocatalyst, cheap and stable semiconductor TiO2 is considered to be a good choice if one is able to reduce its band gap and decrease the recombination rate of charge carriers. The approach that offers such improvements for energy conversion applications is the modification of TiO2 with nitrogen and noble metals. However, the origin of these improvements and possibilities for further design of single-atom catalysts are not always straightforward. To shed light on the atomic-scale picture, we modeled the nitrogen-doped (001) anatase TiO2 surface as a support for palladium and platinum single-atom deposition. The thermodynamics of various synthesis routes for Pd/Pt deposition and nitrogen doping is considered based on density functional theory (DFT)-calculated energies, highlighting the effect of nitrogen doping on metal dimer formation and metal-support interaction. XPS analysis of the valence band of the modified TiO2 nanocrystals, and the calculated charge transfer and electronic structure of single-atom catalysts supported on the (001) anatase TiO2 surface provide an insight into modifications occurring in the valence zone of TiO2 due to nitrogen doping and Pd/Pt deposition at the surface. DFT results also show that substitutional nitrogen doping significantly increases metal-support interaction, while interstitial nitrogen doping promotes only Pt-support interaction. © the Owner Societies.
T2  - Physical Chemistry Chemical Physics
T1  - Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO2-experimental insights and DFT study of the (001) surface
VL  - 22
IS  - 33
SP  - 18536
EP  - 18547
DO  - 10.1039/d0cp03186k
ER  - 

@article{
author = "Batalović, Katarina and Radaković, Jana and Bundaleski, Nenad and Rakočević, Zlatko Lj. and Pašti, Igor A. and Skorodumova, Natalia V. and Rangel, Carmen Mireya",
year = "2020",
abstract = "In pursuit of the ideal photocatalyst, cheap and stable semiconductor TiO2 is considered to be a good choice if one is able to reduce its band gap and decrease the recombination rate of charge carriers. The approach that offers such improvements for energy conversion applications is the modification of TiO2 with nitrogen and noble metals. However, the origin of these improvements and possibilities for further design of single-atom catalysts are not always straightforward. To shed light on the atomic-scale picture, we modeled the nitrogen-doped (001) anatase TiO2 surface as a support for palladium and platinum single-atom deposition. The thermodynamics of various synthesis routes for Pd/Pt deposition and nitrogen doping is considered based on density functional theory (DFT)-calculated energies, highlighting the effect of nitrogen doping on metal dimer formation and metal-support interaction. XPS analysis of the valence band of the modified TiO2 nanocrystals, and the calculated charge transfer and electronic structure of single-atom catalysts supported on the (001) anatase TiO2 surface provide an insight into modifications occurring in the valence zone of TiO2 due to nitrogen doping and Pd/Pt deposition at the surface. DFT results also show that substitutional nitrogen doping significantly increases metal-support interaction, while interstitial nitrogen doping promotes only Pt-support interaction. © the Owner Societies.",
journal = "Physical Chemistry Chemical Physics",
title = "Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO2-experimental insights and DFT study of the (001) surface",
volume = "22",
number = "33",
pages = "18536-18547",
doi = "10.1039/d0cp03186k"
}

Batalović, K., Radaković, J., Bundaleski, N., Rakočević, Z. Lj., Pašti, I. A., Skorodumova, N. V.,& Rangel, C. M.. (2020). Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO2-experimental insights and DFT study of the (001) surface. in Physical Chemistry Chemical Physics, 22(33), 18536-18547.
https://doi.org/10.1039/d0cp03186k

Batalović K, Radaković J, Bundaleski N, Rakočević ZL, Pašti IA, Skorodumova NV, Rangel CM. Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO2-experimental insights and DFT study of the (001) surface. in Physical Chemistry Chemical Physics. 2020;22(33):18536-18547.
doi:10.1039/d0cp03186k .

Batalović, Katarina, Radaković, Jana, Bundaleski, Nenad, Rakočević, Zlatko Lj., Pašti, Igor A., Skorodumova, Natalia V., Rangel, Carmen Mireya, "Origin of photocatalytic activity enhancement in Pd/Pt-deposited anatase N-TiO2-experimental insights and DFT study of the (001) surface" in Physical Chemistry Chemical Physics, 22, no. 33 (2020):18536-18547,
https://doi.org/10.1039/d0cp03186k . .

TY  - JOUR
AU  - Popović, Maja
AU  - Novaković, Mirjana M.
AU  - Noga, Pavol
AU  - Vaňa, Dušan
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8123
AB  - In this study, we demonstrated the formation of a new type of AuAg@Ag nanostructure in titanium nitride (TiN) thin films using sequential implantation of Au and Ag ions. The TiN films deposited by DC reactive sputtering were sequentially implanted with 200 keV gold ions at fluences of 0.5 × 10 16 and 1 × 10 16 ions/cm 2 and 150 keV silver ions at fluences of 1 × 10 16 , 2 × 10 16 , 3 × 10 16 , and 4 × 10 16 ions/cm 2 . Formation of spherical-like particles with dimensions below 10 nm, homogeneously distributed along the ion track of implanted ions is verified by high resolution transmission electron microscopy. Specific nanostructure containing Au–Ag alloy in the center of the particle and only silver on the periphery was found in the TiN sample sequentially implanted with 1.0 × 10 16 ions/cm 2 of Au and 4 × 10 16 ions/cm 2 of Ag using high angle annular dark field scanning electron microscopy together with elemental mapping analysis. On the other hand, for the sample implanted with 0.5 × 10 16 ions/cm 2 of Au and 4 × 10 16 ions/cm 2 of Ag only formation of Au–Ag alloy was observed. A mechanism for the formation of a new type core/shell nanostructure in ion implanted TiN thin films is proposed. By varying the implantation fluence of the gold and silver ions properly, the optimized experimental parameters for creation of a specific AuAg@Ag core/shell nanoparticles were achieved. © 2019 Elsevier B.V.
T2  - Applied Surface Science
T1  - Synthesis of AuAg@Ag core/shell bimetallic nanoparticles in titanium nitride thin films by sequential ion implantation
VL  - 481
SP  - 1418
EP  - 1424
DO  - 10.1016/j.apsusc.2019.03.243
ER  - 

@article{
author = "Popović, Maja and Novaković, Mirjana M. and Noga, Pavol and Vaňa, Dušan and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "In this study, we demonstrated the formation of a new type of AuAg@Ag nanostructure in titanium nitride (TiN) thin films using sequential implantation of Au and Ag ions. The TiN films deposited by DC reactive sputtering were sequentially implanted with 200 keV gold ions at fluences of 0.5 × 10 16 and 1 × 10 16 ions/cm 2 and 150 keV silver ions at fluences of 1 × 10 16 , 2 × 10 16 , 3 × 10 16 , and 4 × 10 16 ions/cm 2 . Formation of spherical-like particles with dimensions below 10 nm, homogeneously distributed along the ion track of implanted ions is verified by high resolution transmission electron microscopy. Specific nanostructure containing Au–Ag alloy in the center of the particle and only silver on the periphery was found in the TiN sample sequentially implanted with 1.0 × 10 16 ions/cm 2 of Au and 4 × 10 16 ions/cm 2 of Ag using high angle annular dark field scanning electron microscopy together with elemental mapping analysis. On the other hand, for the sample implanted with 0.5 × 10 16 ions/cm 2 of Au and 4 × 10 16 ions/cm 2 of Ag only formation of Au–Ag alloy was observed. A mechanism for the formation of a new type core/shell nanostructure in ion implanted TiN thin films is proposed. By varying the implantation fluence of the gold and silver ions properly, the optimized experimental parameters for creation of a specific AuAg@Ag core/shell nanoparticles were achieved. © 2019 Elsevier B.V.",
journal = "Applied Surface Science",
title = "Synthesis of AuAg@Ag core/shell bimetallic nanoparticles in titanium nitride thin films by sequential ion implantation",
volume = "481",
pages = "1418-1424",
doi = "10.1016/j.apsusc.2019.03.243"
}

Popović, M., Novaković, M. M., Noga, P., Vaňa, D.,& Rakočević, Z. Lj.. (2019). Synthesis of AuAg@Ag core/shell bimetallic nanoparticles in titanium nitride thin films by sequential ion implantation. in Applied Surface Science, 481, 1418-1424.
https://doi.org/10.1016/j.apsusc.2019.03.243

Popović M, Novaković MM, Noga P, Vaňa D, Rakočević ZL. Synthesis of AuAg@Ag core/shell bimetallic nanoparticles in titanium nitride thin films by sequential ion implantation. in Applied Surface Science. 2019;481:1418-1424.
doi:10.1016/j.apsusc.2019.03.243 .

Popović, Maja, Novaković, Mirjana M., Noga, Pavol, Vaňa, Dušan, Rakočević, Zlatko Lj., "Synthesis of AuAg@Ag core/shell bimetallic nanoparticles in titanium nitride thin films by sequential ion implantation" in Applied Surface Science, 481 (2019):1418-1424,
https://doi.org/10.1016/j.apsusc.2019.03.243 . .

TY  - JOUR
AU  - Štrbac, Svetlana
AU  - Smiljanić, Milutin Lj.
AU  - Wakelin, Thomas
AU  - Potočnik, Jelena
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S001346861930516X
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8126
AB  - Hydrogen evolution reaction (HER) was studied in alkaline solution on Pt(poly) electrode modified by spontaneously deposited Ir nanoislands. Comprehensive insight into the characteristics of the bimetallic Ir/Pt(poly) catalysts was obtained by a combination of Atomic Force Microscopy (AFM), Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS) and classical electrochemical techniques. HER investigations have shown that the presence of spontaneously deposited Ir enhances the activity of bare Pt(poly) in alkaline solution. This was attributed to the heterogeneity of the active surface sites and to the electronic interaction between two metals in close contact which together facilitated the adsorption of the H intermediate species. © 2019 Elsevier Ltd
T2  - Electrochimica Acta
T1  - Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution
VL  - 306
SP  - 18
EP  - 27
DO  - 10.1016/j.electacta.2019.03.100
ER  - 

@article{
author = "Štrbac, Svetlana and Smiljanić, Milutin Lj. and Wakelin, Thomas and Potočnik, Jelena and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "Hydrogen evolution reaction (HER) was studied in alkaline solution on Pt(poly) electrode modified by spontaneously deposited Ir nanoislands. Comprehensive insight into the characteristics of the bimetallic Ir/Pt(poly) catalysts was obtained by a combination of Atomic Force Microscopy (AFM), Field Emission Scanning Electron Microscopy (FESEM), X-ray Photoelectron Spectroscopy (XPS) and classical electrochemical techniques. HER investigations have shown that the presence of spontaneously deposited Ir enhances the activity of bare Pt(poly) in alkaline solution. This was attributed to the heterogeneity of the active surface sites and to the electronic interaction between two metals in close contact which together facilitated the adsorption of the H intermediate species. © 2019 Elsevier Ltd",
journal = "Electrochimica Acta",
title = "Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution",
volume = "306",
pages = "18-27",
doi = "10.1016/j.electacta.2019.03.100"
}

Štrbac, S., Smiljanić, M. Lj., Wakelin, T., Potočnik, J.,& Rakočević, Z. Lj.. (2019). Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution. in Electrochimica Acta, 306, 18-27.
https://doi.org/10.1016/j.electacta.2019.03.100

Štrbac S, Smiljanić ML, Wakelin T, Potočnik J, Rakočević ZL. Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution. in Electrochimica Acta. 2019;306:18-27.
doi:10.1016/j.electacta.2019.03.100 .

Štrbac, Svetlana, Smiljanić, Milutin Lj., Wakelin, Thomas, Potočnik, Jelena, Rakočević, Zlatko Lj., "Hydrogen evolution reaction on bimetallic Ir/Pt(poly) electrodes in alkaline solution" in Electrochimica Acta, 306 (2019):18-27,
https://doi.org/10.1016/j.electacta.2019.03.100 . .

TY  - JOUR
AU  - Čolović, Božana M.
AU  - Kisić, Danilo
AU  - Jokanović, Bojan
AU  - Rakočević, Zlatko Lj.
AU  - Nasov, Ilija
AU  - Trajkovska Petkoska, Anka
AU  - Jokanović, Vukoman R.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8350
AB  - Thin films of titanium oxides, titanium oxynitrides and titanium nitrides were deposited on glass substrates by the methods of direct current (DC) and pulsed magnetron sputtering and cathodic arc evaporation. Phase analysis of the deposited films by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR) showed the presence of phases with various Ti oxidative states, which indicated a high concentration of oxygen vacancies. The films morphology was investigated by scanning electron microscopy (SEM). Investigations of the films wettability, either with water or ethylene glycol, showed that it depends directly on the concentration of oxygen vacancies. The wettability mechanism was particularly discussed.
T2  - Materials Science-Poland
T1  - Wetting properties of titanium oxides, oxynitrides and nitrides obtained by DC and pulsed magnetron sputtering and cathodic arc evaporation
VL  - 37
IS  - 2
SP  - 173
EP  - 181
DO  - 10.2478/msp-2019-0031
ER  - 

@article{
author = "Čolović, Božana M. and Kisić, Danilo and Jokanović, Bojan and Rakočević, Zlatko Lj. and Nasov, Ilija and Trajkovska Petkoska, Anka and Jokanović, Vukoman R.",
year = "2019",
abstract = "Thin films of titanium oxides, titanium oxynitrides and titanium nitrides were deposited on glass substrates by the methods of direct current (DC) and pulsed magnetron sputtering and cathodic arc evaporation. Phase analysis of the deposited films by X-ray diffraction (XRD) and Fourier-transform infrared spectroscopy (FT-IR) showed the presence of phases with various Ti oxidative states, which indicated a high concentration of oxygen vacancies. The films morphology was investigated by scanning electron microscopy (SEM). Investigations of the films wettability, either with water or ethylene glycol, showed that it depends directly on the concentration of oxygen vacancies. The wettability mechanism was particularly discussed.",
journal = "Materials Science-Poland",
title = "Wetting properties of titanium oxides, oxynitrides and nitrides obtained by DC and pulsed magnetron sputtering and cathodic arc evaporation",
volume = "37",
number = "2",
pages = "173-181",
doi = "10.2478/msp-2019-0031"
}

Čolović, B. M., Kisić, D., Jokanović, B., Rakočević, Z. Lj., Nasov, I., Trajkovska Petkoska, A.,& Jokanović, V. R.. (2019). Wetting properties of titanium oxides, oxynitrides and nitrides obtained by DC and pulsed magnetron sputtering and cathodic arc evaporation. in Materials Science-Poland, 37(2), 173-181.
https://doi.org/10.2478/msp-2019-0031

Čolović BM, Kisić D, Jokanović B, Rakočević ZL, Nasov I, Trajkovska Petkoska A, Jokanović VR. Wetting properties of titanium oxides, oxynitrides and nitrides obtained by DC and pulsed magnetron sputtering and cathodic arc evaporation. in Materials Science-Poland. 2019;37(2):173-181.
doi:10.2478/msp-2019-0031 .

Čolović, Božana M., Kisić, Danilo, Jokanović, Bojan, Rakočević, Zlatko Lj., Nasov, Ilija, Trajkovska Petkoska, Anka, Jokanović, Vukoman R., "Wetting properties of titanium oxides, oxynitrides and nitrides obtained by DC and pulsed magnetron sputtering and cathodic arc evaporation" in Materials Science-Poland, 37, no. 2 (2019):173-181,
https://doi.org/10.2478/msp-2019-0031 . .

TY  - JOUR
AU  - Potočnik, Jelena
AU  - Popović, Maja
AU  - Jokić, Bojan M.
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8385
AB  - In this work we investigated the influence of different deposition angles on the structural and magnetic properties of nickel thin films obtained by Glancing Angle Deposition. The films were deposited onto glass substrates at the angles of 65° and 85°. The structure of the films was studied by scanning electron microscopy, atomic force microscopy and X-ray diffraction, while the magnetic properties were analyzed using magneto-optical Kerr effect microscopy (MOKE). It was found that the variation in the deposition angle has a great influence on the porosity, crystallinity and surface roughness of the Ni films. The obtained changes in microstructure were correlated with the variation in the magnetic properties. MOKE measurements revealed that the thinner films, deposited at the angle of 85°, have a 2.5 times higher coercivity in comparison with the films deposited at the lower angle, which can be ascribed to their higher porosity. © 2019 Elsevier Ltd
T2  - Materials Research Bulletin
T1  - Tailoring the structural and magnetic properties of Ni zigzag nanostructures using different deposition angles
VL  - 119
SP  - 110540
DO  - 10.1016/j.materresbull.2019.110540
ER  - 

@article{
author = "Potočnik, Jelena and Popović, Maja and Jokić, Bojan M. and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "In this work we investigated the influence of different deposition angles on the structural and magnetic properties of nickel thin films obtained by Glancing Angle Deposition. The films were deposited onto glass substrates at the angles of 65° and 85°. The structure of the films was studied by scanning electron microscopy, atomic force microscopy and X-ray diffraction, while the magnetic properties were analyzed using magneto-optical Kerr effect microscopy (MOKE). It was found that the variation in the deposition angle has a great influence on the porosity, crystallinity and surface roughness of the Ni films. The obtained changes in microstructure were correlated with the variation in the magnetic properties. MOKE measurements revealed that the thinner films, deposited at the angle of 85°, have a 2.5 times higher coercivity in comparison with the films deposited at the lower angle, which can be ascribed to their higher porosity. © 2019 Elsevier Ltd",
journal = "Materials Research Bulletin",
title = "Tailoring the structural and magnetic properties of Ni zigzag nanostructures using different deposition angles",
volume = "119",
pages = "110540",
doi = "10.1016/j.materresbull.2019.110540"
}

Potočnik, J., Popović, M., Jokić, B. M.,& Rakočević, Z. Lj.. (2019). Tailoring the structural and magnetic properties of Ni zigzag nanostructures using different deposition angles. in Materials Research Bulletin, 119, 110540.
https://doi.org/10.1016/j.materresbull.2019.110540

Potočnik J, Popović M, Jokić BM, Rakočević ZL. Tailoring the structural and magnetic properties of Ni zigzag nanostructures using different deposition angles. in Materials Research Bulletin. 2019;119:110540.
doi:10.1016/j.materresbull.2019.110540 .

Potočnik, Jelena, Popović, Maja, Jokić, Bojan M., Rakočević, Zlatko Lj., "Tailoring the structural and magnetic properties of Ni zigzag nanostructures using different deposition angles" in Materials Research Bulletin, 119 (2019):110540,
https://doi.org/10.1016/j.materresbull.2019.110540 . .

TY  - JOUR
AU  - Modrić-Šahbazović, Almedina
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Schmidt, Emanuel O.
AU  - Gazdić, Izet
AU  - Bibić, Nataša M.
AU  - Ronning, Carsten
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8469
AB  - We investigated the structural and optical changes of Si (100) induced by single or multiple low energy silver ion irradiation with fluences up to 1016 ions/cm2. The irradiated samples were analyzed by the means of Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy and spectroscopic ellipsometry measurements. The results revealed that after 60, 75 and multiple (75 + 60) keV ion implantation Ag atoms are preferentially situated in the near-surface region of the Si with the maximum distribution at 20, 26 and 42 nm, respectively. Spherical-like particles with diameters below 5 nm are homogenously distributed along the ion track of implanted ions. In the case of single ions implantations the Ag nanoparticles are distributed in the shallower regions of silicon, while subsequent implantation of silver with multiple ion energies results in a distribution in a wider region and again a shift of the Ag nanoparticles to larger depths of silicon substrate. As the ion fluence increases a monotonic decrease in the absorption in the ultraviolet region of the spectrum was observed, due to amorphization of the silicon. On the other hand, for the fluences in the range of 1014–1015 ions/cm2 in the long-wave regions wide absorption band appears at wavelengths between 700 nm and 1000 nm, which is due to plasmon resonance of Ag nanoparticles synthesized during implantation. The position of the resonance peak reflects not only the change in the ion fluence, but also the difference in the incident Ag ion energy. After implantation to the higher ion fluences of 1016 ions/cm2 this absorption band was shifted over 1000 nm, which is much above the known values for plasmon resonances of Ag nanoparticles. © 2019 Elsevier B.V.
T2  - Surface and Coatings Technology
T1  - Formation of Ag nanoparticles in Si (100) wafers by single and multiple low energy Ag ions implantation
VL  - 377
SP  - 124913
DO  - 10.1016/j.surfcoat.2019.124913
ER  - 

@article{
author = "Modrić-Šahbazović, Almedina and Novaković, Mirjana M. and Popović, Maja and Schmidt, Emanuel O. and Gazdić, Izet and Bibić, Nataša M. and Ronning, Carsten and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "We investigated the structural and optical changes of Si (100) induced by single or multiple low energy silver ion irradiation with fluences up to 1016 ions/cm2. The irradiated samples were analyzed by the means of Rutherford backscattering spectrometry, X-ray photoelectron spectroscopy, transmission electron microscopy and spectroscopic ellipsometry measurements. The results revealed that after 60, 75 and multiple (75 + 60) keV ion implantation Ag atoms are preferentially situated in the near-surface region of the Si with the maximum distribution at 20, 26 and 42 nm, respectively. Spherical-like particles with diameters below 5 nm are homogenously distributed along the ion track of implanted ions. In the case of single ions implantations the Ag nanoparticles are distributed in the shallower regions of silicon, while subsequent implantation of silver with multiple ion energies results in a distribution in a wider region and again a shift of the Ag nanoparticles to larger depths of silicon substrate. As the ion fluence increases a monotonic decrease in the absorption in the ultraviolet region of the spectrum was observed, due to amorphization of the silicon. On the other hand, for the fluences in the range of 1014–1015 ions/cm2 in the long-wave regions wide absorption band appears at wavelengths between 700 nm and 1000 nm, which is due to plasmon resonance of Ag nanoparticles synthesized during implantation. The position of the resonance peak reflects not only the change in the ion fluence, but also the difference in the incident Ag ion energy. After implantation to the higher ion fluences of 1016 ions/cm2 this absorption band was shifted over 1000 nm, which is much above the known values for plasmon resonances of Ag nanoparticles. © 2019 Elsevier B.V.",
journal = "Surface and Coatings Technology",
title = "Formation of Ag nanoparticles in Si (100) wafers by single and multiple low energy Ag ions implantation",
volume = "377",
pages = "124913",
doi = "10.1016/j.surfcoat.2019.124913"
}

Modrić-Šahbazović, A., Novaković, M. M., Popović, M., Schmidt, E. O., Gazdić, I., Bibić, N. M., Ronning, C.,& Rakočević, Z. Lj.. (2019). Formation of Ag nanoparticles in Si (100) wafers by single and multiple low energy Ag ions implantation. in Surface and Coatings Technology, 377, 124913.
https://doi.org/10.1016/j.surfcoat.2019.124913

Modrić-Šahbazović A, Novaković MM, Popović M, Schmidt EO, Gazdić I, Bibić NM, Ronning C, Rakočević ZL. Formation of Ag nanoparticles in Si (100) wafers by single and multiple low energy Ag ions implantation. in Surface and Coatings Technology. 2019;377:124913.
doi:10.1016/j.surfcoat.2019.124913 .

Modrić-Šahbazović, Almedina, Novaković, Mirjana M., Popović, Maja, Schmidt, Emanuel O., Gazdić, Izet, Bibić, Nataša M., Ronning, Carsten, Rakočević, Zlatko Lj., "Formation of Ag nanoparticles in Si (100) wafers by single and multiple low energy Ag ions implantation" in Surface and Coatings Technology, 377 (2019):124913,
https://doi.org/10.1016/j.surfcoat.2019.124913 . .

TY  - JOUR
AU  - Smiljanić, Milutin Lj.
AU  - Rakočević, Zlatko Lj.
AU  - Potočnik, Jelena
AU  - Štrbac, Svetlana
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8504
AB  - Hydrogen evolution reaction (HER) was studied on polycrystalline Pd, Pd(poly), decorated by spontaneously deposited Ru nanoislands below full coverage. Surface features of as-prepared bimetallic Ru/Pd(poly) electrodes were explored by Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray Spectrometer. Electrochemical properties and hydrogen evolution activities of obtained electrodes were investigated in an alkaline electrolyte by Cyclic and Linear Sweep Voltammetry, respectively. It was found that the activities of bimetallic Ru/Pd(poly) electrodes for HER significantly exceeded the activity of bare Pd(poly) and approached the activity of Pt, which is the most active material for this reaction. This enhancement was explained by the favorable influence of the electronic interaction between Pd substrate and Ru nanoislands on the adsorption of the reactive H species. © 2019 The Authors.
T2  - International Journal of Electrochemical Science
T1  - Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium
VL  - 14
IS  - 7
SP  - 5938
EP  - 5949
DO  - 10.20964/2019.07.34
ER  - 

@article{
author = "Smiljanić, Milutin Lj. and Rakočević, Zlatko Lj. and Potočnik, Jelena and Štrbac, Svetlana",
year = "2019",
abstract = "Hydrogen evolution reaction (HER) was studied on polycrystalline Pd, Pd(poly), decorated by spontaneously deposited Ru nanoislands below full coverage. Surface features of as-prepared bimetallic Ru/Pd(poly) electrodes were explored by Field Emission Scanning Electron Microscopy with Energy Dispersive X-ray Spectrometer. Electrochemical properties and hydrogen evolution activities of obtained electrodes were investigated in an alkaline electrolyte by Cyclic and Linear Sweep Voltammetry, respectively. It was found that the activities of bimetallic Ru/Pd(poly) electrodes for HER significantly exceeded the activity of bare Pd(poly) and approached the activity of Pt, which is the most active material for this reaction. This enhancement was explained by the favorable influence of the electronic interaction between Pd substrate and Ru nanoislands on the adsorption of the reactive H species. © 2019 The Authors.",
journal = "International Journal of Electrochemical Science",
title = "Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium",
volume = "14",
number = "7",
pages = "5938-5949",
doi = "10.20964/2019.07.34"
}

Smiljanić, M. Lj., Rakočević, Z. Lj., Potočnik, J.,& Štrbac, S.. (2019). Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium. in International Journal of Electrochemical Science, 14(7), 5938-5949.
https://doi.org/10.20964/2019.07.34

Smiljanić ML, Rakočević ZL, Potočnik J, Štrbac S. Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium. in International Journal of Electrochemical Science. 2019;14(7):5938-5949.
doi:10.20964/2019.07.34 .

Smiljanić, Milutin Lj., Rakočević, Zlatko Lj., Potočnik, Jelena, Štrbac, Svetlana, "Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium" in International Journal of Electrochemical Science, 14, no. 7 (2019):5938-5949,
https://doi.org/10.20964/2019.07.34 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko R.
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Horvath, Endre
AU  - Kollar, Marton
AU  - Nafradi, Balint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forro, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8538
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
VL  - 45
IS  - 8
SP  - 10013
EP  - 10020
DO  - 10.1016/j.ceramint.2019.02.045
ER  - 

@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko R. and Popović, Maja and Rakočević, Zlatko Lj. and Horvath, Endre and Kollar, Marton and Nafradi, Balint and Schiller, Andreas and Domanski, Konrad and Forro, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe T.",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
volume = "45",
number = "8",
pages = "10013-10020",
doi = "10.1016/j.ceramint.2019.02.045"
}

Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V. R., Popović, M., Rakočević, Z. Lj., Horvath, E., Kollar, M., Nafradi, B., Schiller, A., Domanski, K., Forro, L., Pavlović, V. P.,& Janaćković, Đ. T.. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International, 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045

Vujančević J, Andričević P, Bjelajac A, Đokić VR, Popović M, Rakočević ZL, Horvath E, Kollar M, Nafradi B, Schiller A, Domanski K, Forro L, Pavlović VP, Janaćković ĐT. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045 .

Vujančević, Jelena, Andričević, Pavao, Bjelajac, Anđelika, Đokić, Veljko R., Popović, Maja, Rakočević, Zlatko Lj., Horvath, Endre, Kollar, Marton, Nafradi, Balint, Schiller, Andreas, Domanski, Konrad, Forro, Laszlo, Pavlović, Vera P., Janaćković, Đorđe T., "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" in Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 . .

TY  - JOUR
AU  - Vujančević, Jelena
AU  - Andričević, Pavao
AU  - Bjelajac, Anđelika
AU  - Đokić, Veljko R.
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Horvath, Endre
AU  - Kollar, Marton
AU  - Nafradi, Balint
AU  - Schiller, Andreas
AU  - Domanski, Konrad
AU  - Forro, Laszlo
AU  - Pavlović, Vera P.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8539
AB  - Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019
T2  - Ceramics International
T1  - Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping
VL  - 45
IS  - 8
SP  - 10013
EP  - 10020
DO  - 10.1016/j.ceramint.2019.02.045
ER  - 

@article{
author = "Vujančević, Jelena and Andričević, Pavao and Bjelajac, Anđelika and Đokić, Veljko R. and Popović, Maja and Rakočević, Zlatko Lj. and Horvath, Endre and Kollar, Marton and Nafradi, Balint and Schiller, Andreas and Domanski, Konrad and Forro, Laszlo and Pavlović, Vera P. and Janaćković, Đorđe T.",
year = "2019",
abstract = "Highly ordered, anodically grown TiO 2 nanotubes on titanium supports were annealed in ammonia atmosphere in order to incorporate nitrogen doping (≤2 at.%) in the titanium oxide lattice. FESEM micrographs revealed nanotubes with an average outer diameter of 101.5 ± 1.5 nm and an average wall thickness of about 13 nm. Anatase crystals were formed inside the tubes after annealing in ammonia atmosphere for 30 min. With further annealing, rutile peaks appeared due to the thermal oxidation of the foil and rise as the duration of heat treatment was increased. The concentration and chemical nature of nitrogen in the nanotube arrays can be correlated to the optical response of dry-pressed heterojunctions of doped TiO 2 /CH 3 NH 3 PbI 3 single crystals. The N-TiO 2 /perovskite heterojunction with the highest amount of interstitial nitrogen exhibited an improved photocurrent, indicating the importance of the semiconductor doping-based heterojunction optimization strategies to deliver competitive levels of halide perovskite-based optoelectronic devices to be envisioned for urban infrastructures. © 2019",
journal = "Ceramics International",
title = "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping",
volume = "45",
number = "8",
pages = "10013-10020",
doi = "10.1016/j.ceramint.2019.02.045"
}

Vujančević, J., Andričević, P., Bjelajac, A., Đokić, V. R., Popović, M., Rakočević, Z. Lj., Horvath, E., Kollar, M., Nafradi, B., Schiller, A., Domanski, K., Forro, L., Pavlović, V. P.,& Janaćković, Đ. T.. (2019). Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International, 45(8), 10013-10020.
https://doi.org/10.1016/j.ceramint.2019.02.045

Vujančević J, Andričević P, Bjelajac A, Đokić VR, Popović M, Rakočević ZL, Horvath E, Kollar M, Nafradi B, Schiller A, Domanski K, Forro L, Pavlović VP, Janaćković ĐT. Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping. in Ceramics International. 2019;45(8):10013-10020.
doi:10.1016/j.ceramint.2019.02.045 .

Vujančević, Jelena, Andričević, Pavao, Bjelajac, Anđelika, Đokić, Veljko R., Popović, Maja, Rakočević, Zlatko Lj., Horvath, Endre, Kollar, Marton, Nafradi, Balint, Schiller, Andreas, Domanski, Konrad, Forro, Laszlo, Pavlović, Vera P., Janaćković, Đorđe T., "Dry-pressed anodized titania nanotube/CH3NH3PbI3 single crystal heterojunctions: The beneficial role of N doping" in Ceramics International, 45, no. 8 (2019):10013-10020,
https://doi.org/10.1016/j.ceramint.2019.02.045 . .

TY  - JOUR
AU  - Bjelajac, Anđelika
AU  - Petrović, Rada
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Socol, Gabriel
AU  - Mihailescu, Ion N.
AU  - Janaćković, Đorđe T.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8589
AB  - The ∼60 nm wide and ∼2 μm long TiO2 nanotubes were obtained by anodization of Ti films sputtered on F-doped tin oxide glass. For N-doping the samples were annealed in ammonia atmosphere. The effect of pre- and post-annealing in air on the nature and amount of incorporated N was studied by X-ray photoelectron spectroscopy. By measuring the absorption spectra of the obtained samples and interpreting the corresponding Tauc plots it was shown that the sample annealed just in ammonia showed the highest visible light absorption even after sputtering cleaning and a decrease of N amount from 3.8% to 1%. Pre and/or post annealing in air led to smaller amount of incorporated N, that caused less pronounced absorption enhancement and smaller band gap narrowing compared to the sample annealed only in ammonia. By fitting of N 1 s line, the contribution that was assigned to substitutional N was detected only in the samples that did not sustained post-annealing. The study showed that post-annealing in air might lead to partial conversion of N atoms in TiO2 to oxidized nitrogen species that are easily removed with sputtering. It is also possible that substitutional nitrogen was suppressed by oxygen from air to move to interstitial site. Weakly bonded NOx surface species, which are cleaned away by sputtering, can be removed by post-annealing in air. Those surface species could act as sensitizers and when their amounts are reduced, the core absorption properties, as a result of interstitial incorporation of N in TiO2 structure, were revealed. Much lower visible light sensitization was achieved in the case of pre-annealed sample in comparison to sample without pre-annealing, regardless the same quantity and type of incorporated nitrogen.
T2  - Thin Solid Films
T1  - Doping of TiO2 nanotubes with nitrogen by annealing in ammonia for visible light activation: Influence of pre- and post-annealing in air
VL  - 692
SP  - 137598
DO  - 10.1016/j.tsf.2019.137598
ER  - 

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

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

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

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

TY  - JOUR
AU  - Seke, Mariana
AU  - Petrović, Danijela
AU  - Labudović-Borović, Milica
AU  - Borisev, Ivana
AU  - Novaković, Mirjana M.
AU  - Rakočević, Zlatko Lj.
AU  - Đorđević, Aleksandar N.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8649
AB  - Fullerenol C60(OH)24 with its spherical shape, symmetrical structure, 1 nm size and the ability to form polyionic nanoparticles in water solution, was used to synthesise a novel nanocomposite made of fullerenol nanoparticles (FNP) and iron ions (Fe2+). The FNP/Fe2+ nanocomposite was characterised by DLS and TEM-EDS analyses which have shown that the size distribution of FNP/Fe2+ stayed in the same scope as the size distribution of FNP, ranging from 11 to 60 nm. However, Fe2+ did affect the change of FNP’s zeta potential (− 49.2 mV), shifting it to more positive values (− 30.8 mV). In this study, it was assumed that FNP/Fe2+ could reduce the toxic effects of doxorubicin (Dox). Male Wistar rats were treated i.p. with FNP/Fe2+ nanocomposite 1 h prior to Dox treatment. At the subcellular level, the ultrastructural analysis revealed minor alterations sporadically displayed within the heart and liver tissues. Moreover, at the molecular level, the gene expressions analysis of mRNAs for catalase (heart and liver) and MnSOD (only liver) were significantly downregulated, indicating reduction in oxidative stress. Overall, the pretreatment with FNP/Fe2+ nanocomposite, followed by Dox application, significantly diminished harmful effects of the applied drug on the heart and liver, suggesting the potential protective effect of the nanocomposite on the healthy tissues. © 2019, Springer Nature B.V.
T2  - Journal of Nanoparticle Research
T1  - Fullerenol/iron nanocomposite diminishes doxorubicin-induced toxicity
VL  - 21
IS  - 11
SP  - 239
DO  - 10.1007/s11051-019-4681-4
ER  - 

@article{
author = "Seke, Mariana and Petrović, Danijela and Labudović-Borović, Milica and Borisev, Ivana and Novaković, Mirjana M. and Rakočević, Zlatko Lj. and Đorđević, Aleksandar N.",
year = "2019",
abstract = "Fullerenol C60(OH)24 with its spherical shape, symmetrical structure, 1 nm size and the ability to form polyionic nanoparticles in water solution, was used to synthesise a novel nanocomposite made of fullerenol nanoparticles (FNP) and iron ions (Fe2+). The FNP/Fe2+ nanocomposite was characterised by DLS and TEM-EDS analyses which have shown that the size distribution of FNP/Fe2+ stayed in the same scope as the size distribution of FNP, ranging from 11 to 60 nm. However, Fe2+ did affect the change of FNP’s zeta potential (− 49.2 mV), shifting it to more positive values (− 30.8 mV). In this study, it was assumed that FNP/Fe2+ could reduce the toxic effects of doxorubicin (Dox). Male Wistar rats were treated i.p. with FNP/Fe2+ nanocomposite 1 h prior to Dox treatment. At the subcellular level, the ultrastructural analysis revealed minor alterations sporadically displayed within the heart and liver tissues. Moreover, at the molecular level, the gene expressions analysis of mRNAs for catalase (heart and liver) and MnSOD (only liver) were significantly downregulated, indicating reduction in oxidative stress. Overall, the pretreatment with FNP/Fe2+ nanocomposite, followed by Dox application, significantly diminished harmful effects of the applied drug on the heart and liver, suggesting the potential protective effect of the nanocomposite on the healthy tissues. © 2019, Springer Nature B.V.",
journal = "Journal of Nanoparticle Research",
title = "Fullerenol/iron nanocomposite diminishes doxorubicin-induced toxicity",
volume = "21",
number = "11",
pages = "239",
doi = "10.1007/s11051-019-4681-4"
}

Seke, M., Petrović, D., Labudović-Borović, M., Borisev, I., Novaković, M. M., Rakočević, Z. Lj.,& Đorđević, A. N.. (2019). Fullerenol/iron nanocomposite diminishes doxorubicin-induced toxicity. in Journal of Nanoparticle Research, 21(11), 239.
https://doi.org/10.1007/s11051-019-4681-4

Seke M, Petrović D, Labudović-Borović M, Borisev I, Novaković MM, Rakočević ZL, Đorđević AN. Fullerenol/iron nanocomposite diminishes doxorubicin-induced toxicity. in Journal of Nanoparticle Research. 2019;21(11):239.
doi:10.1007/s11051-019-4681-4 .

Seke, Mariana, Petrović, Danijela, Labudović-Borović, Milica, Borisev, Ivana, Novaković, Mirjana M., Rakočević, Zlatko Lj., Đorđević, Aleksandar N., "Fullerenol/iron nanocomposite diminishes doxorubicin-induced toxicity" in Journal of Nanoparticle Research, 21, no. 11 (2019):239,
https://doi.org/10.1007/s11051-019-4681-4 . .

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Skoulas, Evangelos
AU  - Kovač, Janez
AU  - Mitrić, Miodrag
AU  - Potočnik, Jelena
AU  - Rakočević, Zlatko Lj.
AU  - Stratakis, Emmanuel
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8816
AB  - The formation of an ordered surface texture with micro and nanometer features on Ti/Zr multilayers is studied for better understanding and improvement of cell integration. Nanocomposite in form 30×(Ti/Zr)/Si thin films was deposited by ion sputtering on Si substrate for biocompatibility investigation. Surface texturing by femtosecond laser processing made it possible to form the laser-induced periodic surface structure (LIPSS) in each laser-written line. At fluence slightly above the ablation threshold, beside the formation of low spatial frequency-LIPSS (LSFL) oriented perpendicular to the direction of the laser polarization, the laser-induced surface oxidation was achieved on the irradiated area. Intermixing between the Ti and Zr layers with the formation of alloy in the sub-surface region was attained during the laser processing. The surface of the Ti/Zr multilayer system with changed composition and topography was used to observe the effect of topography on the survival, adhesion and proliferation of the murine mesenchymal stem cells (MSCs). Confocal and SEM microscopy images showed that cell adhesion and their growth improve on these modified surfaces, with tendency of the cell orientation along of LIPSS in laser-written lines. © 2019 by the authors.
T2  - Coatings
T1  - Laser-assisted surface texturing of Ti/Zr multilayers for mesenchymal stem cell response
VL  - 9
IS  - 12
SP  - 854
DO  - 10.3390/coatings9120854
ER  - 

@article{
author = "Petrović, Suzana and Peruško, Davor and Skoulas, Evangelos and Kovač, Janez and Mitrić, Miodrag and Potočnik, Jelena and Rakočević, Zlatko Lj. and Stratakis, Emmanuel",
year = "2019",
abstract = "The formation of an ordered surface texture with micro and nanometer features on Ti/Zr multilayers is studied for better understanding and improvement of cell integration. Nanocomposite in form 30×(Ti/Zr)/Si thin films was deposited by ion sputtering on Si substrate for biocompatibility investigation. Surface texturing by femtosecond laser processing made it possible to form the laser-induced periodic surface structure (LIPSS) in each laser-written line. At fluence slightly above the ablation threshold, beside the formation of low spatial frequency-LIPSS (LSFL) oriented perpendicular to the direction of the laser polarization, the laser-induced surface oxidation was achieved on the irradiated area. Intermixing between the Ti and Zr layers with the formation of alloy in the sub-surface region was attained during the laser processing. The surface of the Ti/Zr multilayer system with changed composition and topography was used to observe the effect of topography on the survival, adhesion and proliferation of the murine mesenchymal stem cells (MSCs). Confocal and SEM microscopy images showed that cell adhesion and their growth improve on these modified surfaces, with tendency of the cell orientation along of LIPSS in laser-written lines. © 2019 by the authors.",
journal = "Coatings",
title = "Laser-assisted surface texturing of Ti/Zr multilayers for mesenchymal stem cell response",
volume = "9",
number = "12",
pages = "854",
doi = "10.3390/coatings9120854"
}

Petrović, S., Peruško, D., Skoulas, E., Kovač, J., Mitrić, M., Potočnik, J., Rakočević, Z. Lj.,& Stratakis, E.. (2019). Laser-assisted surface texturing of Ti/Zr multilayers for mesenchymal stem cell response. in Coatings, 9(12), 854.
https://doi.org/10.3390/coatings9120854

Petrović S, Peruško D, Skoulas E, Kovač J, Mitrić M, Potočnik J, Rakočević ZL, Stratakis E. Laser-assisted surface texturing of Ti/Zr multilayers for mesenchymal stem cell response. in Coatings. 2019;9(12):854.
doi:10.3390/coatings9120854 .

Petrović, Suzana, Peruško, Davor, Skoulas, Evangelos, Kovač, Janez, Mitrić, Miodrag, Potočnik, Jelena, Rakočević, Zlatko Lj., Stratakis, Emmanuel, "Laser-assisted surface texturing of Ti/Zr multilayers for mesenchymal stem cell response" in Coatings, 9, no. 12 (2019):854,
https://doi.org/10.3390/coatings9120854 . .

TY  - CONF
AU  - Stepanović, O.
AU  - Popović, M.
AU  - Novaković, Miroslav M.
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10877
AB  - In this paper we report a study on the effects of implanted In+ ions into GaAs and Si - semiconductors with direct and indirect band gap, respectively. Both systems, (In,Ga)As and (In)Si, are of great interest for fundamental investigations of their structures as well as for the development of technological applications with enhanced electronic and optical properties. In+ ions were implanted into n-type GaAs (100) and n-type Si (100) at acceleration energy of 60 keV and the fluences of 1×1014 ion/cm2, 5×1014 ion/cm2, 1×1015 ion/cm2 and 2×1015ion/cm2.It is well known that after ion implantation process substrate crystal structure is quite damaged due to the formation of point defects and dislocations which can strongly influence the semiconducting properties. In order to remove structural damage, after implantation all samples were annealed by rapid thermal annealing at temperatures 900oC1000oC. As-implanted and annealed samples were characterized for the structural changes and results are presented together with optical and sheet resistance measurements. Change in crystallinity of the samples was monitored by transmission electron microscopy, while chemical composition was determined by energy dispersive X-ray spectroscopy. Spectroscopic ellipsometry in the wavelength range 260 nm-2066 nm was performed in order to determine optical parameters and change in energy band gap. Atomic force microscopy was used to determine changes in surface roughness. Damage introduction during ion irradiation and its removal during a thermal annealing are key issues which are highlighted.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 8th Serbian Ceramic Society Conference : program and the book of abstracts; September 23-25, 2019; Belgrade
T1  - Indium ion implantation effects on the structural, optical and electrical properties of GaAs and Si wafers
SP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10877
ER  - 

@conference{
author = "Stepanović, O. and Popović, M. and Novaković, Miroslav M. and Nenadović, Miloš and Potočnik, Jelena and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "In this paper we report a study on the effects of implanted In+ ions into GaAs and Si - semiconductors with direct and indirect band gap, respectively. Both systems, (In,Ga)As and (In)Si, are of great interest for fundamental investigations of their structures as well as for the development of technological applications with enhanced electronic and optical properties. In+ ions were implanted into n-type GaAs (100) and n-type Si (100) at acceleration energy of 60 keV and the fluences of 1×1014 ion/cm2, 5×1014 ion/cm2, 1×1015 ion/cm2 and 2×1015ion/cm2.It is well known that after ion implantation process substrate crystal structure is quite damaged due to the formation of point defects and dislocations which can strongly influence the semiconducting properties. In order to remove structural damage, after implantation all samples were annealed by rapid thermal annealing at temperatures 900oC1000oC. As-implanted and annealed samples were characterized for the structural changes and results are presented together with optical and sheet resistance measurements. Change in crystallinity of the samples was monitored by transmission electron microscopy, while chemical composition was determined by energy dispersive X-ray spectroscopy. Spectroscopic ellipsometry in the wavelength range 260 nm-2066 nm was performed in order to determine optical parameters and change in energy band gap. Atomic force microscopy was used to determine changes in surface roughness. Damage introduction during ion irradiation and its removal during a thermal annealing are key issues which are highlighted.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 8th Serbian Ceramic Society Conference : program and the book of abstracts; September 23-25, 2019; Belgrade",
title = "Indium ion implantation effects on the structural, optical and electrical properties of GaAs and Si wafers",
pages = "50",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10877"
}

Stepanović, O., Popović, M., Novaković, M. M., Nenadović, M., Potočnik, J.,& Rakočević, Z. Lj.. (2019). Indium ion implantation effects on the structural, optical and electrical properties of GaAs and Si wafers. in Advanced Ceramics and Application : 8th Serbian Ceramic Society Conference : program and the book of abstracts; September 23-25, 2019; Belgrade
Belgrade : Serbian Ceramic Society., 50.
https://hdl.handle.net/21.15107/rcub_vinar_10877

Stepanović O, Popović M, Novaković MM, Nenadović M, Potočnik J, Rakočević ZL. Indium ion implantation effects on the structural, optical and electrical properties of GaAs and Si wafers. in Advanced Ceramics and Application : 8th Serbian Ceramic Society Conference : program and the book of abstracts; September 23-25, 2019; Belgrade. 2019;:50.
https://hdl.handle.net/21.15107/rcub_vinar_10877 .

Stepanović, O., Popović, M., Novaković, Miroslav M., Nenadović, Miloš, Potočnik, Jelena, Rakočević, Zlatko Lj., "Indium ion implantation effects on the structural, optical and electrical properties of GaAs and Si wafers" in Advanced Ceramics and Application : 8th Serbian Ceramic Society Conference : program and the book of abstracts; September 23-25, 2019; Belgrade (2019):50,
https://hdl.handle.net/21.15107/rcub_vinar_10877 .

TY  - CONF
AU  - Stepanović, O.
AU  - Popović, M.
AU  - Novaković, M.
AU  - Nenadović, Miloš
AU  - Potočnik, Jelena
AU  - Rakočević, Zlatko
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11879
AB  - In this work we studied the influence of In+ ion implantation on structural and optical characteristics on semiconductors with direct (GaAs) [1] and indirect (Si) [2] band gap. A plenty of information on physical properties of various semiconductor materials can be obtained from optical spectra. In order to determine optical parameters, refraction index and extinction coefficient, we employed spectroscopic ellipsometry as a very useful technique. The parameters of the implantation process and the optical properties of the implanted GaAs and Si wafers are discussed with particular emphasis on the SWIR (Short Wavelength Infrared) region. In+ ions were implanted into n-type GaAs (100) and n-type Si (100) at an acceleration energy of 60 keV with doses of 1x1014 ion/cm2 , 5x1014 ion/cm2 , 1x1015 ion/cm2 and 2x1015 ion/cm2 in both cases. The change of the optical parameters in the subsurface region of the GaAs and Si wafers caused by implanted In+ ions is observed comparing the values of ellypsometric data and energy gap (Eg) of unimplanted and implanted wafers. In order to evaluate the crystallinity of the samples we used TEM microscopy.
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  - Influence of In+ ions implantation in GaAs and Si on their optical characteristics
SP  - 111
EP  - 111
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11879
ER  - 

@conference{
author = "Stepanović, O. and Popović, M. and Novaković, M. and Nenadović, Miloš and Potočnik, Jelena and Rakočević, Zlatko",
year = "2019",
abstract = "In this work we studied the influence of In+ ion implantation on structural and optical characteristics on semiconductors with direct (GaAs) [1] and indirect (Si) [2] band gap. A plenty of information on physical properties of various semiconductor materials can be obtained from optical spectra. In order to determine optical parameters, refraction index and extinction coefficient, we employed spectroscopic ellipsometry as a very useful technique. The parameters of the implantation process and the optical properties of the implanted GaAs and Si wafers are discussed with particular emphasis on the SWIR (Short Wavelength Infrared) region. In+ ions were implanted into n-type GaAs (100) and n-type Si (100) at an acceleration energy of 60 keV with doses of 1x1014 ion/cm2 , 5x1014 ion/cm2 , 1x1015 ion/cm2 and 2x1015 ion/cm2 in both cases. The change of the optical parameters in the subsurface region of the GaAs and Si wafers caused by implanted In+ ions is observed comparing the values of ellypsometric data and energy gap (Eg) of unimplanted and implanted wafers. In order to evaluate the crystallinity of the samples we used TEM microscopy.",
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 = "Influence of In+ ions implantation in GaAs and Si on their optical characteristics",
pages = "111-111",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11879"
}

Stepanović, O., Popović, M., Novaković, M., Nenadović, M., Potočnik, J.,& Rakočević, Z.. (2019). Influence of In+ ions implantation in GaAs and Si on their optical characteristics. 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., 111-111.
https://hdl.handle.net/21.15107/rcub_vinar_11879

Stepanović O, Popović M, Novaković M, Nenadović M, Potočnik J, Rakočević Z. Influence of In+ ions implantation in GaAs and Si on their optical characteristics. in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts. 2019;:111-111.
https://hdl.handle.net/21.15107/rcub_vinar_11879 .

Stepanović, O., Popović, M., Novaković, M., Nenadović, Miloš, Potočnik, Jelena, Rakočević, Zlatko, "Influence of In+ ions implantation in GaAs and Si on their optical characteristics" in PHOTONICA2019 : 7th International School and Conference on Photonics & Machine Learning with Photonics Symposium : Book of abstracts (2019):111-111,
https://hdl.handle.net/21.15107/rcub_vinar_11879 .

TY  - JOUR
AU  - Modrić-Šahbazović, Almedina
AU  - Novaković, Mirjana M.
AU  - Schmidt, Emanuel O.
AU  - Gazdić, Izet
AU  - Đokić, Veljko R.
AU  - Peruško, Davor
AU  - Bibić, Nataša M.
AU  - Ronning, Carsten
AU  - Rakočević, Zlatko Lj.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8016
AB  - Nanosphere lithography is an effective technique for high throughput fabrication of well-ordered patterns on large areas. This study reports on nanostructuring of silicon samples by means of Ag ions implantation through self-organized polystyrene (PS) masks. The PS nanospheres with a diameter of ∼150 nm were self-assembled in a hexagonal array on top of Si(100) wafers, and then used as a mask for subsequent 60 keV silver ion implantation. Different fluences were applied up to 2 × 1016 ions/cm2 in order to create a distribution of different sizes and densities of buried metal nanoparticles. The surface morphology and the subsurface structures were studied by scanning electron microscopy and cross-sectional transmission electron microscopy, as a function of the mask deformation upon irradiation and the implantation parameters itself. We demonstrate that Ag is implanted into Si only through the mask openings, thus forming a regular array of amorphized regions over the wide area of silicon substrate. These fragments are of similar dimensions of the spheres with widths of about 190 nm and distributed over 60 nm in depth due to the given ion range. At the subsurface region of the implanted fragments, the synthesis of small sized and optically active Ag nanoparticles is clearly observed. The samples show a strong absorption peak in the long-wavelength region from 689 to 745 nm characteristic for surface plasmon resonance excitations, which could be fitted well using the Maxwell-Garnett`s theory. © 2018 Elsevier B.V.
T2  - Optical Materials
T1  - Silicon nanostructuring by Ag ions implantation through nanosphere lithography mask
VL  - 88
SP  - 508
EP  - 515
DO  - 10.1016/j.optmat.2018.12.022
ER  - 

@article{
author = "Modrić-Šahbazović, Almedina and Novaković, Mirjana M. and Schmidt, Emanuel O. and Gazdić, Izet and Đokić, Veljko R. and Peruško, Davor and Bibić, Nataša M. and Ronning, Carsten and Rakočević, Zlatko Lj.",
year = "2019",
abstract = "Nanosphere lithography is an effective technique for high throughput fabrication of well-ordered patterns on large areas. This study reports on nanostructuring of silicon samples by means of Ag ions implantation through self-organized polystyrene (PS) masks. The PS nanospheres with a diameter of ∼150 nm were self-assembled in a hexagonal array on top of Si(100) wafers, and then used as a mask for subsequent 60 keV silver ion implantation. Different fluences were applied up to 2 × 1016 ions/cm2 in order to create a distribution of different sizes and densities of buried metal nanoparticles. The surface morphology and the subsurface structures were studied by scanning electron microscopy and cross-sectional transmission electron microscopy, as a function of the mask deformation upon irradiation and the implantation parameters itself. We demonstrate that Ag is implanted into Si only through the mask openings, thus forming a regular array of amorphized regions over the wide area of silicon substrate. These fragments are of similar dimensions of the spheres with widths of about 190 nm and distributed over 60 nm in depth due to the given ion range. At the subsurface region of the implanted fragments, the synthesis of small sized and optically active Ag nanoparticles is clearly observed. The samples show a strong absorption peak in the long-wavelength region from 689 to 745 nm characteristic for surface plasmon resonance excitations, which could be fitted well using the Maxwell-Garnett`s theory. © 2018 Elsevier B.V.",
journal = "Optical Materials",
title = "Silicon nanostructuring by Ag ions implantation through nanosphere lithography mask",
volume = "88",
pages = "508-515",
doi = "10.1016/j.optmat.2018.12.022"
}

Modrić-Šahbazović, A., Novaković, M. M., Schmidt, E. O., Gazdić, I., Đokić, V. R., Peruško, D., Bibić, N. M., Ronning, C.,& Rakočević, Z. Lj.. (2019). Silicon nanostructuring by Ag ions implantation through nanosphere lithography mask. in Optical Materials, 88, 508-515.
https://doi.org/10.1016/j.optmat.2018.12.022

Modrić-Šahbazović A, Novaković MM, Schmidt EO, Gazdić I, Đokić VR, Peruško D, Bibić NM, Ronning C, Rakočević ZL. Silicon nanostructuring by Ag ions implantation through nanosphere lithography mask. in Optical Materials. 2019;88:508-515.
doi:10.1016/j.optmat.2018.12.022 .

Modrić-Šahbazović, Almedina, Novaković, Mirjana M., Schmidt, Emanuel O., Gazdić, Izet, Đokić, Veljko R., Peruško, Davor, Bibić, Nataša M., Ronning, Carsten, Rakočević, Zlatko Lj., "Silicon nanostructuring by Ag ions implantation through nanosphere lithography mask" in Optical Materials, 88 (2019):508-515,
https://doi.org/10.1016/j.optmat.2018.12.022 . .