TY  - JOUR
AU  - Milovanović, Dubravka
AU  - Rajčić, Boris
AU  - Ranković, Dragan
AU  - Stankov, Biljana
AU  - Čekada, Miha
AU  - Ciganović, Jovan
AU  - Đurđević-Milošević, Dragica
AU  - Stević, Zoran
AU  - Kuzmanović, Miroslav
AU  - Šibalija, Tatjana
AU  - Petronić, Sanja
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12723
AB  - This paper presents a study and comparison of surface effects induced by picosecond and nanosecond laser modification of a Ti6Al4V alloy surface under different ambient conditions: air and argon- and nitrogen-rich atmospheres. Detailed surface characterization was performed for all experimental conditions. Damage threshold fluences for picosecond and nanosecond laser irradiation in all three ambient conditions were determined. The observed surface features were a resolidified pool of molten material, craters, hydrodynamic effects and parallel periodic surface structures. Laser-induced periodic surface structures are formed by multi-mode-beam nanosecond laser action and picosecond laser action. Crown-like structures at crater rims are specific features for picosecond Nd:YAG laser action in argon-rich ambient conditions. Elemental analysis of the surfaces indicated nitride compound formation only in the nitrogen-rich ambient conditions. The constituents of the formed plasma were also investigated. Exploring the impact of process control parameters on output responses has been undertaken within the context of laser modification under different environmental conditions. Parametric optimization of the nanosecond laser modification was carried out by implementing an advanced method based on Taguchi’s parametric design and multivariate statistical techniques, and optimal settings are proposed for each atmosphere.
T2  - Micromachines
T1  - Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process
VL  - 15
IS  - 1
SP  - 5
DO  - 10.3390/mi15010005
ER  - 

@article{
author = "Milovanović, Dubravka and Rajčić, Boris and Ranković, Dragan and Stankov, Biljana and Čekada, Miha and Ciganović, Jovan and Đurđević-Milošević, Dragica and Stević, Zoran and Kuzmanović, Miroslav and Šibalija, Tatjana and Petronić, Sanja",
year = "2024",
abstract = "This paper presents a study and comparison of surface effects induced by picosecond and nanosecond laser modification of a Ti6Al4V alloy surface under different ambient conditions: air and argon- and nitrogen-rich atmospheres. Detailed surface characterization was performed for all experimental conditions. Damage threshold fluences for picosecond and nanosecond laser irradiation in all three ambient conditions were determined. The observed surface features were a resolidified pool of molten material, craters, hydrodynamic effects and parallel periodic surface structures. Laser-induced periodic surface structures are formed by multi-mode-beam nanosecond laser action and picosecond laser action. Crown-like structures at crater rims are specific features for picosecond Nd:YAG laser action in argon-rich ambient conditions. Elemental analysis of the surfaces indicated nitride compound formation only in the nitrogen-rich ambient conditions. The constituents of the formed plasma were also investigated. Exploring the impact of process control parameters on output responses has been undertaken within the context of laser modification under different environmental conditions. Parametric optimization of the nanosecond laser modification was carried out by implementing an advanced method based on Taguchi’s parametric design and multivariate statistical techniques, and optimal settings are proposed for each atmosphere.",
journal = "Micromachines",
title = "Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process",
volume = "15",
number = "1",
pages = "5",
doi = "10.3390/mi15010005"
}

Milovanović, D., Rajčić, B., Ranković, D., Stankov, B., Čekada, M., Ciganović, J., Đurđević-Milošević, D., Stević, Z., Kuzmanović, M., Šibalija, T.,& Petronić, S.. (2024). Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process. in Micromachines, 15(1), 5.
https://doi.org/10.3390/mi15010005

Milovanović D, Rajčić B, Ranković D, Stankov B, Čekada M, Ciganović J, Đurđević-Milošević D, Stević Z, Kuzmanović M, Šibalija T, Petronić S. Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process. in Micromachines. 2024;15(1):5.
doi:10.3390/mi15010005 .

Milovanović, Dubravka, Rajčić, Boris, Ranković, Dragan, Stankov, Biljana, Čekada, Miha, Ciganović, Jovan, Đurđević-Milošević, Dragica, Stević, Zoran, Kuzmanović, Miroslav, Šibalija, Tatjana, Petronić, Sanja, "Microstructure Formations Resulting from Nanosecond and Picosecond Laser Irradiation of a Ti-Based Alloy under Controlled Atmospheric Conditions and Optimization of the Irradiation Process" in Micromachines, 15, no. 1 (2024):5,
https://doi.org/10.3390/mi15010005 . .

TY  - CONF
AU  - Rosić, Milena
AU  - Čebela, Maria
AU  - Labus, Nebojša
AU  - Radović, Marko
AU  - Aškrabić, Sonja
AU  - Dohčević-Mitrović, Zorana
AU  - Stojmenović, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11482
AB  - Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.
PB  - Belgrade : Institute for Multidisciplinary Research
C3  - Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
T1  - Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites
SP  - 119
EP  - 119
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11482
ER  - 

@conference{
author = "Rosić, Milena and Čebela, Maria and Labus, Nebojša and Radović, Marko and Aškrabić, Sonja and Dohčević-Mitrović, Zorana and Stojmenović, Marija",
year = "2023",
abstract = "Ca1-xGdxMnO3 (x = 0.05–0.20) nanostructured perovskites were successfully synthesized by modified glycine nitrate procedure (MGNP). Temperature intervals of sintering and phase transition during heating were revealed during dilatometric measurements. In order to determine the band gap values of the tested samples, ellipsometric measurements were performed in the UV-VIS spectral range. Decrease of band gap values with increase of Gd dopant content was attributed to n-type doping and upward shifting of the Fermi level in the conduction band. The investigation of the crystal structure and phase content of nanocrystalline Ca1- xGdxMnO3 powders was continued using micro-Raman spectroscopy. The electrical conductivity of Gd3+ doped sintered samples CaMnO3 as a function of temperature was measured by electrochemical impedance spectroscopy (EIS), in the temperature range of 400–700 °C. The corresponding activation energies of conductivity, measured in the investigated temperature range, were also discussed. The obtained research results showed that the highest hardness values of 7.58 GPa respectively, were achieved and that these nanostructured materials can be used as a high-density ceramic material for various industrial applications.",
publisher = "Belgrade : Institute for Multidisciplinary Research",
journal = "Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia",
title = "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites",
pages = "119-119",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11482"
}

Rosić, M., Čebela, M., Labus, N., Radović, M., Aškrabić, S., Dohčević-Mitrović, Z.,& Stojmenović, M.. (2023). Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia
Belgrade : Institute for Multidisciplinary Research., 119-119.
https://hdl.handle.net/21.15107/rcub_vinar_11482

Rosić M, Čebela M, Labus N, Radović M, Aškrabić S, Dohčević-Mitrović Z, Stojmenović M. Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites. in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia. 2023;:119-119.
https://hdl.handle.net/21.15107/rcub_vinar_11482 .

Rosić, Milena, Čebela, Maria, Labus, Nebojša, Radović, Marko, Aškrabić, Sonja, Dohčević-Mitrović, Zorana, Stojmenović, Marija, "Influence of Gd-doping on electrical properties in Ca1-xGdxMnO3 (x=0.05, 0.1, 0.15, 0.2) perovskites" in Programme and the Book of Abstracts / 7th Conference of The Serbian Society for Ceramic Materials, 7CSCS-2023, June 14-16, 2023 Belgrade, Serbia (2023):119-119,
https://hdl.handle.net/21.15107/rcub_vinar_11482 .

TY  - JOUR
AU  - Miletić, Mirjana
AU  - Vilotić, Aleksandra
AU  - Korićanac, Lela
AU  - Žakula, Jelena
AU  - Jovanović Krivokuća, Milica
AU  - Dohčević-Mitrović, Zorana
AU  - Aškrabić, Sonja
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10542
AB  - Selective cytotoxicity of ZnO nanoparticles among different cell types and cancer and non-cancerous cells has been demonstrated earlier. In the view of anticancer potential of ZnO nanoparticles and their presence in numerous industrial products, it is of great importance to carefully evaluate their effects and mechanisms of action in both cancerous and healthy cells. In this paper, the effects of ZnO nanoparticles on cancerous HeLa and non-cancerous MRC-5 cells are investigated by studying the changes in the vibrational properties of the cells using Raman spectroscopy. Both types of cells were incubated with ZnO nanoparticles of average size 40 nm in the doses from the range 10–40 µg/ml for the period of 48 h, after which Raman spectra were collected. Raman modes’ intensity ratios I1659/I1444, I2855/I2933 and I1337/I1305 were determined as spectral markers of the cytotoxic effect of ZnO in both cell types. Non-negative principal component analysis was used instead of standard one for analysis and detection of spectral features characteristic for nanoparticle-treated cells. The first several non-negative loading vectors obtained in this analysis coincided remarkably well with the Raman spectra of particular biomolecules, showing increase of lipid and decrease of nucleic acids and protein content. Our study pointed out that Raman spectral markers of lipid unsaturation, especially I1270/I1300, are relevant for tracing the cytotoxic effect of ZnO nanoparticles on both cancerous and non-cancerous cells. The change of these spectral markers is correlated to the dose of applied nanoparticles and to the degree of cellular damage. Furthermore, great similarity of spectral features of increasing lipids to spectral features of phosphatidylserine, one of the main apoptotic markers, was recognized in treated cells. Finally, the results strongly indicated that the degree of lipid saturation, presented in the cells, plays an important role in the interaction of cells with nanoparticles.
T2  - Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy
T1  - Spectroscopic signature of ZnO NP-induced cell death modalities assessed by non-negative PCA
VL  - 288
SP  - 122180
DO  - 10.1016/j.saa.2022.122180
ER  - 

@article{
author = "Miletić, Mirjana and Vilotić, Aleksandra and Korićanac, Lela and Žakula, Jelena and Jovanović Krivokuća, Milica and Dohčević-Mitrović, Zorana and Aškrabić, Sonja",
year = "2023",
abstract = "Selective cytotoxicity of ZnO nanoparticles among different cell types and cancer and non-cancerous cells has been demonstrated earlier. In the view of anticancer potential of ZnO nanoparticles and their presence in numerous industrial products, it is of great importance to carefully evaluate their effects and mechanisms of action in both cancerous and healthy cells. In this paper, the effects of ZnO nanoparticles on cancerous HeLa and non-cancerous MRC-5 cells are investigated by studying the changes in the vibrational properties of the cells using Raman spectroscopy. Both types of cells were incubated with ZnO nanoparticles of average size 40 nm in the doses from the range 10–40 µg/ml for the period of 48 h, after which Raman spectra were collected. Raman modes’ intensity ratios I1659/I1444, I2855/I2933 and I1337/I1305 were determined as spectral markers of the cytotoxic effect of ZnO in both cell types. Non-negative principal component analysis was used instead of standard one for analysis and detection of spectral features characteristic for nanoparticle-treated cells. The first several non-negative loading vectors obtained in this analysis coincided remarkably well with the Raman spectra of particular biomolecules, showing increase of lipid and decrease of nucleic acids and protein content. Our study pointed out that Raman spectral markers of lipid unsaturation, especially I1270/I1300, are relevant for tracing the cytotoxic effect of ZnO nanoparticles on both cancerous and non-cancerous cells. The change of these spectral markers is correlated to the dose of applied nanoparticles and to the degree of cellular damage. Furthermore, great similarity of spectral features of increasing lipids to spectral features of phosphatidylserine, one of the main apoptotic markers, was recognized in treated cells. Finally, the results strongly indicated that the degree of lipid saturation, presented in the cells, plays an important role in the interaction of cells with nanoparticles.",
journal = "Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy",
title = "Spectroscopic signature of ZnO NP-induced cell death modalities assessed by non-negative PCA",
volume = "288",
pages = "122180",
doi = "10.1016/j.saa.2022.122180"
}

Miletić, M., Vilotić, A., Korićanac, L., Žakula, J., Jovanović Krivokuća, M., Dohčević-Mitrović, Z.,& Aškrabić, S.. (2023). Spectroscopic signature of ZnO NP-induced cell death modalities assessed by non-negative PCA. in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy, 288, 122180.
https://doi.org/10.1016/j.saa.2022.122180

Miletić M, Vilotić A, Korićanac L, Žakula J, Jovanović Krivokuća M, Dohčević-Mitrović Z, Aškrabić S. Spectroscopic signature of ZnO NP-induced cell death modalities assessed by non-negative PCA. in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy. 2023;288:122180.
doi:10.1016/j.saa.2022.122180 .

Miletić, Mirjana, Vilotić, Aleksandra, Korićanac, Lela, Žakula, Jelena, Jovanović Krivokuća, Milica, Dohčević-Mitrović, Zorana, Aškrabić, Sonja, "Spectroscopic signature of ZnO NP-induced cell death modalities assessed by non-negative PCA" in Spectrochimica Acta. Part A: Molecular and Biomolecular Spectroscopy, 288 (2023):122180,
https://doi.org/10.1016/j.saa.2022.122180 . .

TY  - JOUR
AU  - Vinić, Milica
AU  - Kuzmanović, Miroslav M.
AU  - Savović, Jelena
AU  - Ivković, Milivoje
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10694
AB  - In this study, plasma induced by a nanosecond Nd:YAG laser on thin oil films deposited on a silica wafer was characterized by evaluating the main plasma parameters. Spatially and temporally integrated spectral measurements were performed under experimental conditions optimized for elemental analysis of trace metals in oil. Time-resolved values of the spectral line intensities, electron number density, and plasma temperature were obtained from time-integrated measurements by subtracting averaged spectra recorded at different time delays. The electron number density was estimated using the Stark broadened profile of the hydrogen Balmer alpha line. Ionization temperatures were derived from Mg ionic to atomic line intensity ratios. The obtained apparent values of time-resolved plasma parameters were in the range of 1.1×1017 cm-3 (1.5 μs) to 1.5×1016 cm-3 (4 μs) and 9400 K (3 μs) to 7200 K (5 μs), depending on the delay time. Emission spectra of C2 and CN molecules were used to evaluate the rotational and vibrational temperature.
T2  - Journal of the Serbian Chemical Society
T1  - Diagnostics of laser-induced plasma from a thin film of oil on a silica wafer
VL  - 88
IS  - 2
SP  - 153
EP  - 167
DO  - 10.2298/JSC211228028V
ER  - 

@article{
author = "Vinić, Milica and Kuzmanović, Miroslav M. and Savović, Jelena and Ivković, Milivoje",
year = "2023",
abstract = "In this study, plasma induced by a nanosecond Nd:YAG laser on thin oil films deposited on a silica wafer was characterized by evaluating the main plasma parameters. Spatially and temporally integrated spectral measurements were performed under experimental conditions optimized for elemental analysis of trace metals in oil. Time-resolved values of the spectral line intensities, electron number density, and plasma temperature were obtained from time-integrated measurements by subtracting averaged spectra recorded at different time delays. The electron number density was estimated using the Stark broadened profile of the hydrogen Balmer alpha line. Ionization temperatures were derived from Mg ionic to atomic line intensity ratios. The obtained apparent values of time-resolved plasma parameters were in the range of 1.1×1017 cm-3 (1.5 μs) to 1.5×1016 cm-3 (4 μs) and 9400 K (3 μs) to 7200 K (5 μs), depending on the delay time. Emission spectra of C2 and CN molecules were used to evaluate the rotational and vibrational temperature.",
journal = "Journal of the Serbian Chemical Society",
title = "Diagnostics of laser-induced plasma from a thin film of oil on a silica wafer",
volume = "88",
number = "2",
pages = "153-167",
doi = "10.2298/JSC211228028V"
}

Vinić, M., Kuzmanović, M. M., Savović, J.,& Ivković, M.. (2023). Diagnostics of laser-induced plasma from a thin film of oil on a silica wafer. in Journal of the Serbian Chemical Society, 88(2), 153-167.
https://doi.org/10.2298/JSC211228028V

Vinić M, Kuzmanović MM, Savović J, Ivković M. Diagnostics of laser-induced plasma from a thin film of oil on a silica wafer. in Journal of the Serbian Chemical Society. 2023;88(2):153-167.
doi:10.2298/JSC211228028V .

Vinić, Milica, Kuzmanović, Miroslav M., Savović, Jelena, Ivković, Milivoje, "Diagnostics of laser-induced plasma from a thin film of oil on a silica wafer" in Journal of the Serbian Chemical Society, 88, no. 2 (2023):153-167,
https://doi.org/10.2298/JSC211228028V . .

TY  - JOUR
AU  - Pešić, Ivan
AU  - Petrović, Miloš
AU  - Vuksanović, Marija M.
AU  - Popović, Maja
AU  - Rabasović, Maja
AU  - Šević, Dragutin
AU  - Radojević, Vesna
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10668
AB  - Processing and characterization of PMMA-MXene composites were investigated. γ-Methacryloxypropyltrimethoxy (MEMO) silane was used to modify the surface of MXenes and improve the compatibility between MXenes and the polymer. The FTIR analysis revealed the formation of a chemical bond between MXene and MEMO silane, while the XPS analysis confirmed the presence of silicon in the functionalized MXene. PMMA composites with non-functionalized and functionalized MXene were prepared using a solution casting method. Tensile tests showed that, compared to neat PMMA, Young’s modulus increased in both composites by 22.1 and 27.6%, respectively. As a result of coupling between the PMMA matrix and the surface-modified MXenes, the tensile strength also increased by about 37%. In addition, optical spectroscopy showed higher absorption for the composite with surface-modified MXenes and short-lived fluorescence with emission intensity sensitive to the crumpling of functionalized MXene nanosheets.
T2  - Nanocomposites
T1  - Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane
VL  - 8
IS  - 1
SP  - 215
EP  - 226
DO  - 10.1080/20550324.2023.2168844
ER  - 

@article{
author = "Pešić, Ivan and Petrović, Miloš and Vuksanović, Marija M. and Popović, Maja and Rabasović, Maja and Šević, Dragutin and Radojević, Vesna",
year = "2022",
abstract = "Processing and characterization of PMMA-MXene composites were investigated. γ-Methacryloxypropyltrimethoxy (MEMO) silane was used to modify the surface of MXenes and improve the compatibility between MXenes and the polymer. The FTIR analysis revealed the formation of a chemical bond between MXene and MEMO silane, while the XPS analysis confirmed the presence of silicon in the functionalized MXene. PMMA composites with non-functionalized and functionalized MXene were prepared using a solution casting method. Tensile tests showed that, compared to neat PMMA, Young’s modulus increased in both composites by 22.1 and 27.6%, respectively. As a result of coupling between the PMMA matrix and the surface-modified MXenes, the tensile strength also increased by about 37%. In addition, optical spectroscopy showed higher absorption for the composite with surface-modified MXenes and short-lived fluorescence with emission intensity sensitive to the crumpling of functionalized MXene nanosheets.",
journal = "Nanocomposites",
title = "Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane",
volume = "8",
number = "1",
pages = "215-226",
doi = "10.1080/20550324.2023.2168844"
}

Pešić, I., Petrović, M., Vuksanović, M. M., Popović, M., Rabasović, M., Šević, D.,& Radojević, V.. (2022). Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane. in Nanocomposites, 8(1), 215-226.
https://doi.org/10.1080/20550324.2023.2168844

Pešić I, Petrović M, Vuksanović MM, Popović M, Rabasović M, Šević D, Radojević V. Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane. in Nanocomposites. 2022;8(1):215-226.
doi:10.1080/20550324.2023.2168844 .

Pešić, Ivan, Petrović, Miloš, Vuksanović, Marija M., Popović, Maja, Rabasović, Maja, Šević, Dragutin, Radojević, Vesna, "Structural, optical and mechanical characterization of PMMA- MXene composites functionalized with MEMO silane" in Nanocomposites, 8, no. 1 (2022):215-226,
https://doi.org/10.1080/20550324.2023.2168844 . .