Gaković, Biljana M.

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Authority KeyName Variants
orcid::0000-0002-5537-7804
  • Gaković, Biljana M. (77)
Projects
Effects of laser radiation and plasma on novel materials in their synthesis, modification, and analysis Fabrication and characterization of nano-photonic functional structrues in biomedicine and informatics
Spektroskopska i laserska istraživanja površina, plazme i životne sredine SPIRIT - Support of Public and Industrial Research using Ion Beam Technology
Physics of Ordered Nanostructures and New Materials in Photonics Slovenian Research Agency, Ministry of Science, Education, and Sports of the Republic of Croatia, COST Action [MP0903 Nanoalloy]
Applications of Laserplasma Studies to Particle Acceleration, Laboratory Astrophysics, Laser Induced Nuclear Reactions and the Fast Ignition Approach to Internal Confinement Fusion [COST- P14], Ministry of Science and Environmental Protection of the Republic Serbia Belarusian Republican Foundation for Fundamental Research [F11SRB-004]
COST Action [MP0903] COST Action [MP0903 Nanoalloy], Center for Multidisciplinary Studies, Serbia
COST ActionMP1208 COST-P14 action
European Community, COST Action, [CM1104] European Community, COST Action [CM1104], Slovenian Research Agency, Ministry of Science, Education, and Sports of the Republic of Croatia
European Community, COST Action (MP1208) European Community, COST Action [MP1208], National Authority for Research and Innovation in the frame of Nucleus programme [304/2011, 4N/2016]
European Cooperation in Science and Technology (COST Action) [MP.1208] European Scientific Foundation, Ministry of Education, Youth and Sports of the Czech Republic [LC528]
SILAMPS - Silicon integrated lasers and optical amplifiers APPOLO - Hub of Application Laboratories for Equipment Assessment in Laser Based Manufacturing
NFFA-Europe - Nanoscience Foundries and Fine Analysis - Europe LiNaBioFluid - Laser-induced Nanostructures as Biomimetic Model of Fluid Transport in the Integument of Animals
Physical processes in the synthesis of advanced nanostructured materials Kvantna i optička interferometrija
MEPhI Academic Excellence Program Ministry of Science and Technological Development of the Republic of Serbia [142065, 141003]
Ministry of Science and Technological Development of the Republic of Serbia [142065], Applications of Laser-plasma Studies to Particle Acceleration, Laboratory Astrophysics, Laser Induced Nuclear Reactions and the Fast Ignition Approach to Internal Confinement Fusions [COST-P14] Ministry of Science and Technological Development of the Republic of Serbia [142065], Ministry of Science and Technology of the Republic of Slovenia
Ministry of Science and Technological Development of the Republic of Serbia, Ministry of Science and Technology of the Republic of Slovenia, Vinca Institute of Nuclear Sciences in Belgrade, Jozef Stefan Institute, Ljubljana Ministry of Science and Technology of the Republic of Slovenia

Author's Bibliography

Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses

Kudryashov, Sergey I.; Smirnov, Nikita A.; Gaković, Biljana M.; Milovanović, Dubravka S.; Bezhanov, Stanislav G.; Uryupin, Sergey A.; Ionin, Andrey A.

(2019)

TY  - JOUR
AU  - Kudryashov, Sergey I.
AU  - Smirnov, Nikita A.
AU  - Gaković, Biljana M.
AU  - Milovanović, Dubravka S.
AU  - Bezhanov, Stanislav G.
AU  - Uryupin, Sergey A.
AU  - Ionin, Andrey A.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8535
AB  - The dependences of the depth of single-pulse ablation of the steel surface on the energy density of ultrashort laser pulses (0.3–12 ps) with a wavelength of 515 nm have the form different from the usual logarithmic one for linear absorption of radiation. Since the density of states of free conduction electrons in the s band is low, and the d band of strongly bound electrons with a high density of states is located around the Fermi level, these dependences have been approximated within the two-photon absorption model. The two-photon absorption coefficient increases almost linearly with the duration of laser pulses, which indicates the saturation of absorption and allows estimating the corresponding parameters of the electronic subsystem. © 2019, Pleiades Publishing, Inc.
T2  - JETP Letters
T1  - Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses
VL  - 110
IS  - 2
SP  - 107
EP  - 110
DO  - 10.1134/S0021364019140091
ER  - 
@article{
author = "Kudryashov, Sergey I. and Smirnov, Nikita A. and Gaković, Biljana M. and Milovanović, Dubravka S. and Bezhanov, Stanislav G. and Uryupin, Sergey A. and Ionin, Andrey A.",
year = "2019",
abstract = "The dependences of the depth of single-pulse ablation of the steel surface on the energy density of ultrashort laser pulses (0.3–12 ps) with a wavelength of 515 nm have the form different from the usual logarithmic one for linear absorption of radiation. Since the density of states of free conduction electrons in the s band is low, and the d band of strongly bound electrons with a high density of states is located around the Fermi level, these dependences have been approximated within the two-photon absorption model. The two-photon absorption coefficient increases almost linearly with the duration of laser pulses, which indicates the saturation of absorption and allows estimating the corresponding parameters of the electronic subsystem. © 2019, Pleiades Publishing, Inc.",
journal = "JETP Letters",
title = "Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses",
volume = "110",
number = "2",
pages = "107-110",
doi = "10.1134/S0021364019140091"
}
Kudryashov, S. I., Smirnov, N. A., Gaković, B. M., Milovanović, D. S., Bezhanov, S. G., Uryupin, S. A.,& Ionin, A. A.. (2019). Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses. in JETP Letters, 110(2), 107-110.
https://doi.org/10.1134/S0021364019140091
Kudryashov SI, Smirnov NA, Gaković BM, Milovanović DS, Bezhanov SG, Uryupin SA, Ionin AA. Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses. in JETP Letters. 2019;110(2):107-110.
doi:10.1134/S0021364019140091 .
Kudryashov, Sergey I., Smirnov, Nikita A., Gaković, Biljana M., Milovanović, Dubravka S., Bezhanov, Stanislav G., Uryupin, Sergey A., Ionin, Andrey A., "Dependence of the Two-Photon Absorption Coefficient of Steel on the Pulse Duration During Its Ablation by Femto- and Picosecond Laser Pulses" in JETP Letters, 110, no. 2 (2019):107-110,
https://doi.org/10.1134/S0021364019140091 . .
2
2
2

Microprocessing of a steel surface by single pulses of variable width

Smirnov, Nikita A.; Kudryashov, Sergey I.; Danilov, Pavel A.; Rudenko, Andrey A.; Gaković, Biljana M.; Milovanović, Dubravka S.; Ionin, Andrey A.; Nastulyavichus, Alena A.; Umanskaya, S. F.

(2019)

TY  - JOUR
AU  - Smirnov, Nikita A.
AU  - Kudryashov, Sergey I.
AU  - Danilov, Pavel A.
AU  - Rudenko, Andrey A.
AU  - Gaković, Biljana M.
AU  - Milovanović, Dubravka S.
AU  - Ionin, Andrey A.
AU  - Nastulyavichus, Alena A.
AU  - Umanskaya, S. F.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8412
AB  - Single-pulse microprocessing of a steel surface with a variable pulse width (0.3-12.3 ps) and a wavelength of 515 nm was performed. The morphology of the craters was visualized by a scanning electron microscope and an optical profilometer. The nonmonotonic behavior of ablation thresholds with a minimum at ≈1.5 ps, due to achieving the electron-phonon relaxation time of the absorbed energy in the steel was revealed. It is shown that, with an increase in the pulse width in the considered width range, the efficiency of the ablation decreases by a factor of 2, which is explained by the partial transition from the phase explosion to the surface evaporation. © 2019 Astro Ltd.
T2  - Laser Physics Letters
T1  - Microprocessing of a steel surface by single pulses of variable width
VL  - 16
IS  - 5
SP  - 056002
DO  - 10.1088/1612-202X/ab0c85
ER  - 
@article{
author = "Smirnov, Nikita A. and Kudryashov, Sergey I. and Danilov, Pavel A. and Rudenko, Andrey A. and Gaković, Biljana M. and Milovanović, Dubravka S. and Ionin, Andrey A. and Nastulyavichus, Alena A. and Umanskaya, S. F.",
year = "2019",
abstract = "Single-pulse microprocessing of a steel surface with a variable pulse width (0.3-12.3 ps) and a wavelength of 515 nm was performed. The morphology of the craters was visualized by a scanning electron microscope and an optical profilometer. The nonmonotonic behavior of ablation thresholds with a minimum at ≈1.5 ps, due to achieving the electron-phonon relaxation time of the absorbed energy in the steel was revealed. It is shown that, with an increase in the pulse width in the considered width range, the efficiency of the ablation decreases by a factor of 2, which is explained by the partial transition from the phase explosion to the surface evaporation. © 2019 Astro Ltd.",
journal = "Laser Physics Letters",
title = "Microprocessing of a steel surface by single pulses of variable width",
volume = "16",
number = "5",
pages = "056002",
doi = "10.1088/1612-202X/ab0c85"
}
Smirnov, N. A., Kudryashov, S. I., Danilov, P. A., Rudenko, A. A., Gaković, B. M., Milovanović, D. S., Ionin, A. A., Nastulyavichus, A. A.,& Umanskaya, S. F.. (2019). Microprocessing of a steel surface by single pulses of variable width. in Laser Physics Letters, 16(5), 056002.
https://doi.org/10.1088/1612-202X/ab0c85
Smirnov NA, Kudryashov SI, Danilov PA, Rudenko AA, Gaković BM, Milovanović DS, Ionin AA, Nastulyavichus AA, Umanskaya SF. Microprocessing of a steel surface by single pulses of variable width. in Laser Physics Letters. 2019;16(5):056002.
doi:10.1088/1612-202X/ab0c85 .
Smirnov, Nikita A., Kudryashov, Sergey I., Danilov, Pavel A., Rudenko, Andrey A., Gaković, Biljana M., Milovanović, Dubravka S., Ionin, Andrey A., Nastulyavichus, Alena A., Umanskaya, S. F., "Microprocessing of a steel surface by single pulses of variable width" in Laser Physics Letters, 16, no. 5 (2019):056002,
https://doi.org/10.1088/1612-202X/ab0c85 . .
7
5
7

Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses

Petrović, Suzana; Gaković, Biljana M.; Panjan, Peter; Kovač, Janez; Lazović, Vladimir M.; Ristoscu, Carmen; Negut, Irina; Mihailescu, Ion N.

(2018)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Gaković, Biljana M.
AU  - Panjan, Peter
AU  - Kovač, Janez
AU  - Lazović, Vladimir M.
AU  - Ristoscu, Carmen
AU  - Negut, Irina
AU  - Mihailescu, Ion N.
PY  - 2018
UR  - http://link.springer.com/10.1007/s11082-018-1475-3
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7686
AB  - The oxidation behaviour and morphological modification of CrN/(Cr,V)N coatings on Si wafers were studied after UV nanosecond laser (wavelength 248 nm, pulse duration 25 ns) processing in ambient air. The evolution of the surface composition and microstructure with the number of accumulated/subsequent pulses was systematically analysed depending on the initial content of vanadium in the as-deposited coatings. Irradiation of CrN/(Cr,V)N coatings with different content of vanadium was carried out at a fluence of 0.17 J cm−2with different number of pulses. The concentration of metallic components was fairly homogeneous distributed throughout the sample. However, on surface and in sub-surface regions the contents of Cr and V are diminished due to laser-induced oxidation. The composition and thickness of forming oxides mixture, Cr2O3and V2O5, are depending on the number of applied laser pulses and the initial vanadium content. The asymmetric progress of surface morphology is characterized by the formation of grainy structures at peripheries and the appearance of cracks and irregular closed shapes in the centre of the irradiation area.
T2  - Optical and Quantum Electronics
T1  - Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses
VL  - 50
IS  - 5
SP  - 208
DO  - 10.1007/s11082-018-1475-3
ER  - 
@article{
author = "Petrović, Suzana and Gaković, Biljana M. and Panjan, Peter and Kovač, Janez and Lazović, Vladimir M. and Ristoscu, Carmen and Negut, Irina and Mihailescu, Ion N.",
year = "2018",
abstract = "The oxidation behaviour and morphological modification of CrN/(Cr,V)N coatings on Si wafers were studied after UV nanosecond laser (wavelength 248 nm, pulse duration 25 ns) processing in ambient air. The evolution of the surface composition and microstructure with the number of accumulated/subsequent pulses was systematically analysed depending on the initial content of vanadium in the as-deposited coatings. Irradiation of CrN/(Cr,V)N coatings with different content of vanadium was carried out at a fluence of 0.17 J cm−2with different number of pulses. The concentration of metallic components was fairly homogeneous distributed throughout the sample. However, on surface and in sub-surface regions the contents of Cr and V are diminished due to laser-induced oxidation. The composition and thickness of forming oxides mixture, Cr2O3and V2O5, are depending on the number of applied laser pulses and the initial vanadium content. The asymmetric progress of surface morphology is characterized by the formation of grainy structures at peripheries and the appearance of cracks and irregular closed shapes in the centre of the irradiation area.",
journal = "Optical and Quantum Electronics",
title = "Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses",
volume = "50",
number = "5",
pages = "208",
doi = "10.1007/s11082-018-1475-3"
}
Petrović, S., Gaković, B. M., Panjan, P., Kovač, J., Lazović, V. M., Ristoscu, C., Negut, I.,& Mihailescu, I. N.. (2018). Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses. in Optical and Quantum Electronics, 50(5), 208.
https://doi.org/10.1007/s11082-018-1475-3
Petrović S, Gaković BM, Panjan P, Kovač J, Lazović VM, Ristoscu C, Negut I, Mihailescu IN. Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses. in Optical and Quantum Electronics. 2018;50(5):208.
doi:10.1007/s11082-018-1475-3 .
Petrović, Suzana, Gaković, Biljana M., Panjan, Peter, Kovač, Janez, Lazović, Vladimir M., Ristoscu, Carmen, Negut, Irina, Mihailescu, Ion N., "Oxidation behaviour of composite CrN/(Cr,V)N coatings with different contents of vanadium induced by UV nanosecond laser pulses" in Optical and Quantum Electronics, 50, no. 5 (2018):208,
https://doi.org/10.1007/s11082-018-1475-3 . .

Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects

Kudryashov, Sergey I.; Gaković, Biljana M.; Danilov, Pavel A.; Petrović, Srđan M.; Milovanović, Dubravka S.; Rudenko, Andrey A.; Ionin, Andrey A.

(2018)

TY  - JOUR
AU  - Kudryashov, Sergey I.
AU  - Gaković, Biljana M.
AU  - Danilov, Pavel A.
AU  - Petrović, Srđan M.
AU  - Milovanović, Dubravka S.
AU  - Rudenko, Andrey A.
AU  - Ionin, Andrey A.
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1917
AB  - Single-shot femtosecond laser ablation of Ti(Al/Ti)(5) and (Ni/Ti)(5) films on silicon substrates was studied as a function of laser fluence by means of scanning electron microscopy, energy-dispersive x-ray spectroscopy, and optical profilometry. Ablation occurs as gradual threshold-like selective removal of a few top layers at lower fluences and rather continuous removal at higher fluences, exponentially increasing versus ablated depth, with the final complete (through) ablation of the entire films. The observed selective rupture at the different internal interfaces was related to thermomechanically and chemically enhanced (interface-facilitated) explosive boiling, with the corresponding energy deposition provided by cascaded heat transfer in the poorly conducting Ti and Ni, and highly conducting Al layers and the interfacial thermal (Kapitza) resistance effect. Published by AIP Publishing.
T2  - Applied Physics Letters
T1  - Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects
VL  - 112
IS  - 2
DO  - 10.1063/1.5010793
ER  - 
@article{
author = "Kudryashov, Sergey I. and Gaković, Biljana M. and Danilov, Pavel A. and Petrović, Srđan M. and Milovanović, Dubravka S. and Rudenko, Andrey A. and Ionin, Andrey A.",
year = "2018",
abstract = "Single-shot femtosecond laser ablation of Ti(Al/Ti)(5) and (Ni/Ti)(5) films on silicon substrates was studied as a function of laser fluence by means of scanning electron microscopy, energy-dispersive x-ray spectroscopy, and optical profilometry. Ablation occurs as gradual threshold-like selective removal of a few top layers at lower fluences and rather continuous removal at higher fluences, exponentially increasing versus ablated depth, with the final complete (through) ablation of the entire films. The observed selective rupture at the different internal interfaces was related to thermomechanically and chemically enhanced (interface-facilitated) explosive boiling, with the corresponding energy deposition provided by cascaded heat transfer in the poorly conducting Ti and Ni, and highly conducting Al layers and the interfacial thermal (Kapitza) resistance effect. Published by AIP Publishing.",
journal = "Applied Physics Letters",
title = "Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects",
volume = "112",
number = "2",
doi = "10.1063/1.5010793"
}
Kudryashov, S. I., Gaković, B. M., Danilov, P. A., Petrović, S. M., Milovanović, D. S., Rudenko, A. A.,& Ionin, A. A.. (2018). Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects. in Applied Physics Letters, 112(2).
https://doi.org/10.1063/1.5010793
Kudryashov SI, Gaković BM, Danilov PA, Petrović SM, Milovanović DS, Rudenko AA, Ionin AA. Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects. in Applied Physics Letters. 2018;112(2).
doi:10.1063/1.5010793 .
Kudryashov, Sergey I., Gaković, Biljana M., Danilov, Pavel A., Petrović, Srđan M., Milovanović, Dubravka S., Rudenko, Andrey A., Ionin, Andrey A., "Single-shot selective femtosecond laser ablation of multi-layered Ti/Al and Ni/Ti films: Cascaded heat conduction and interfacial thermal effects" in Applied Physics Letters, 112, no. 2 (2018),
https://doi.org/10.1063/1.5010793 . .
8
8
9

Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films

Petrović, Suzana; Gaković, Biljana M.; Zamfirescu, M.; Radu, C.; Peruško, Davor; Radak, Bojan; Ristoscu, Carmen; Zdravković, Slobodan; Luculescu, C. L.; Mihailescu, Ion N.

(2017)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Gaković, Biljana M.
AU  - Zamfirescu, M.
AU  - Radu, C.
AU  - Peruško, Davor
AU  - Radak, Bojan
AU  - Ristoscu, Carmen
AU  - Zdravković, Slobodan
AU  - Luculescu, C. L.
AU  - Mihailescu, Ion N.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7164
AB  - Modification of single and complex nickel-palladium samples by laser processing in the femtosecond time domain was studied. The samples were processed by focused Ti:Sapphire laser beam (Clark CPA-2101) with 775 nm laser wavelength, 2 kHz repetition rate, 200 fs pulse duration. The laser-induced morphological modifications have shown dependence on the applied fluences and number of laser pulses. The formed surface nanostructures on the single NiPd/Si and multilayer 5x(Ni/Pd)/Si systems are compared with individual Ni and Pd thin films. The results show an increase in surface roughness, formation of parallel periodic surface structures, appearance of hydrodynamic features and ablation of surface material. At low number of pulses (less than 10 pulses) and low pulse energies range (not over 1.7 mu J), the two types of laser-induced periodic surface structure (LIPSS) can be observed: low and high spatial frequency LIPSS (HSFL and LSFL). For all samples, the measured LSFL periods were 720 nm for the ripples created solely on thin film surfaces during the single pulse action. In the case of the multi-pulse irradiation, the periodicities of created LSFLs on the all investigated thin films have shown tendency to reduction with increasing of pulse energies. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films
VL  - 417
SP  - 16
EP  - 22
DO  - 10.1016/j.apsusc.2016.12.142
ER  - 
@article{
author = "Petrović, Suzana and Gaković, Biljana M. and Zamfirescu, M. and Radu, C. and Peruško, Davor and Radak, Bojan and Ristoscu, Carmen and Zdravković, Slobodan and Luculescu, C. L. and Mihailescu, Ion N.",
year = "2017",
abstract = "Modification of single and complex nickel-palladium samples by laser processing in the femtosecond time domain was studied. The samples were processed by focused Ti:Sapphire laser beam (Clark CPA-2101) with 775 nm laser wavelength, 2 kHz repetition rate, 200 fs pulse duration. The laser-induced morphological modifications have shown dependence on the applied fluences and number of laser pulses. The formed surface nanostructures on the single NiPd/Si and multilayer 5x(Ni/Pd)/Si systems are compared with individual Ni and Pd thin films. The results show an increase in surface roughness, formation of parallel periodic surface structures, appearance of hydrodynamic features and ablation of surface material. At low number of pulses (less than 10 pulses) and low pulse energies range (not over 1.7 mu J), the two types of laser-induced periodic surface structure (LIPSS) can be observed: low and high spatial frequency LIPSS (HSFL and LSFL). For all samples, the measured LSFL periods were 720 nm for the ripples created solely on thin film surfaces during the single pulse action. In the case of the multi-pulse irradiation, the periodicities of created LSFLs on the all investigated thin films have shown tendency to reduction with increasing of pulse energies. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films",
volume = "417",
pages = "16-22",
doi = "10.1016/j.apsusc.2016.12.142"
}
Petrović, S., Gaković, B. M., Zamfirescu, M., Radu, C., Peruško, D., Radak, B., Ristoscu, C., Zdravković, S., Luculescu, C. L.,& Mihailescu, I. N.. (2017). Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films. in Applied Surface Science, 417, 16-22.
https://doi.org/10.1016/j.apsusc.2016.12.142
Petrović S, Gaković BM, Zamfirescu M, Radu C, Peruško D, Radak B, Ristoscu C, Zdravković S, Luculescu CL, Mihailescu IN. Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films. in Applied Surface Science. 2017;417:16-22.
doi:10.1016/j.apsusc.2016.12.142 .
Petrović, Suzana, Gaković, Biljana M., Zamfirescu, M., Radu, C., Peruško, Davor, Radak, Bojan, Ristoscu, Carmen, Zdravković, Slobodan, Luculescu, C. L., Mihailescu, Ion N., "Femtosecond laser processing of NiPd single and 5x(Ni/Pd) multilayer thin films" in Applied Surface Science, 417 (2017):16-22,
https://doi.org/10.1016/j.apsusc.2016.12.142 . .
2
2
2

Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse

Gaković, Biljana M.; Tsibidis, G. D.; Skoulas, E.; Petrović, Srđan M.; Vasić, Borislav Z.; Stratakis, E.

(2017)

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Tsibidis, G. D.
AU  - Skoulas, E.
AU  - Petrović, Srđan M.
AU  - Vasić, Borislav Z.
AU  - Stratakis, E.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1880
AB  - The interaction of ultra-short laser pulses with Titanium/Aluminium (Ti/Al) nano-layered thin film was investigated. The sample composed of alternating Ti and Al layers of a few nanometres thick was deposited by ion-sputtering. A single pulse irradiation experiment was conducted in an ambient air environment using focused and linearly polarized femtosecond laser pulses for the investigation of the ablation effects. The laser induced morphological changes and the composition were characterized using several microscopy techniques and energy dispersive X-ray spectroscopy. The following results were obtained: (i) at low values of pulse energy/fluence, ablation of the upper Ti layer only was observed; (ii) at higher laser fluence, a two-step ablation of Ti and Al layers takes place, followed by partial removal of the nano-layered film. The experimental observations were supported by a theoretical model accounting for the thermal response of the multiple layered structure upon irradiation with ultra-short laser pulses. Published by AIP Publishing.
T2  - Journal of Applied Physics
T1  - Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse
VL  - 122
IS  - 22
DO  - 10.1063/1.5016548
ER  - 
@article{
author = "Gaković, Biljana M. and Tsibidis, G. D. and Skoulas, E. and Petrović, Srđan M. and Vasić, Borislav Z. and Stratakis, E.",
year = "2017",
abstract = "The interaction of ultra-short laser pulses with Titanium/Aluminium (Ti/Al) nano-layered thin film was investigated. The sample composed of alternating Ti and Al layers of a few nanometres thick was deposited by ion-sputtering. A single pulse irradiation experiment was conducted in an ambient air environment using focused and linearly polarized femtosecond laser pulses for the investigation of the ablation effects. The laser induced morphological changes and the composition were characterized using several microscopy techniques and energy dispersive X-ray spectroscopy. The following results were obtained: (i) at low values of pulse energy/fluence, ablation of the upper Ti layer only was observed; (ii) at higher laser fluence, a two-step ablation of Ti and Al layers takes place, followed by partial removal of the nano-layered film. The experimental observations were supported by a theoretical model accounting for the thermal response of the multiple layered structure upon irradiation with ultra-short laser pulses. Published by AIP Publishing.",
journal = "Journal of Applied Physics",
title = "Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse",
volume = "122",
number = "22",
doi = "10.1063/1.5016548"
}
Gaković, B. M., Tsibidis, G. D., Skoulas, E., Petrović, S. M., Vasić, B. Z.,& Stratakis, E.. (2017). Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse. in Journal of Applied Physics, 122(22).
https://doi.org/10.1063/1.5016548
Gaković BM, Tsibidis GD, Skoulas E, Petrović SM, Vasić BZ, Stratakis E. Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse. in Journal of Applied Physics. 2017;122(22).
doi:10.1063/1.5016548 .
Gaković, Biljana M., Tsibidis, G. D., Skoulas, E., Petrović, Srđan M., Vasić, Borislav Z., Stratakis, E., "Partial ablation of Ti/Al nano-layer thin film by single femtosecond laser pulse" in Journal of Applied Physics, 122, no. 22 (2017),
https://doi.org/10.1063/1.5016548 . .
2
13
13
12

Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate

Gaković, Biljana M.; Petrović, Suzana; Albu, C.; Zamfirescu, M.; Panjan, Peter; Milovanović, Dubravka S.; Popescu-Pelin, G.; Mihailescu, Ion N.

(2017)

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Albu, C.
AU  - Zamfirescu, M.
AU  - Panjan, Peter
AU  - Milovanović, Dubravka S.
AU  - Popescu-Pelin, G.
AU  - Mihailescu, Ion N.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1326
AB  - Processing of AlTiN/TiN multilayered hard coatings by femtosecond (fs) laser pulses has been investigated. Irradiation was performed in air with linearly polarized laser radiation with pulses of 200 fs duration at 775 nm wavelength. Single or 1000 subsequent laser pulses were directed at normal incidence towards target surface. Laser energy per pulse was adjusted from 0.5 to 50 mu J and corresponding fluence was 0.17-17.5 J cm(-2). The as deposited and laser-ablated samples were characterized by optical confocal microscopy, optical profilometry and scanning and transmition electron microscopy. In case of the AlTiN/TiN coating, a single-pulse damage threshold of 0.41 J cm(-2) was estimated. Well defined holes/craters with diameters from 7 to 35 mu m, up to 40 mu m depth were drilled, depending on laser pulse energy and number, after 1000 laser pulses. For small energy/fluence, laser induced periodical surface structures were observed. A model is discussed which can account for these features by the accumulation effect during multi-pulse irradiation. The forming craters can prove useful for fabrication of micron solid state lubricant reservoirs in the protective coating-steel system.
T2  - Optics and Laser Technology
T1  - Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate
VL  - 89
SP  - 200
EP  - 207
DO  - 10.1016/j.optlastec.2016.10.015
ER  - 
@article{
author = "Gaković, Biljana M. and Petrović, Suzana and Albu, C. and Zamfirescu, M. and Panjan, Peter and Milovanović, Dubravka S. and Popescu-Pelin, G. and Mihailescu, Ion N.",
year = "2017",
abstract = "Processing of AlTiN/TiN multilayered hard coatings by femtosecond (fs) laser pulses has been investigated. Irradiation was performed in air with linearly polarized laser radiation with pulses of 200 fs duration at 775 nm wavelength. Single or 1000 subsequent laser pulses were directed at normal incidence towards target surface. Laser energy per pulse was adjusted from 0.5 to 50 mu J and corresponding fluence was 0.17-17.5 J cm(-2). The as deposited and laser-ablated samples were characterized by optical confocal microscopy, optical profilometry and scanning and transmition electron microscopy. In case of the AlTiN/TiN coating, a single-pulse damage threshold of 0.41 J cm(-2) was estimated. Well defined holes/craters with diameters from 7 to 35 mu m, up to 40 mu m depth were drilled, depending on laser pulse energy and number, after 1000 laser pulses. For small energy/fluence, laser induced periodical surface structures were observed. A model is discussed which can account for these features by the accumulation effect during multi-pulse irradiation. The forming craters can prove useful for fabrication of micron solid state lubricant reservoirs in the protective coating-steel system.",
journal = "Optics and Laser Technology",
title = "Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate",
volume = "89",
pages = "200-207",
doi = "10.1016/j.optlastec.2016.10.015"
}
Gaković, B. M., Petrović, S., Albu, C., Zamfirescu, M., Panjan, P., Milovanović, D. S., Popescu-Pelin, G.,& Mihailescu, I. N.. (2017). Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate. in Optics and Laser Technology, 89, 200-207.
https://doi.org/10.1016/j.optlastec.2016.10.015
Gaković BM, Petrović S, Albu C, Zamfirescu M, Panjan P, Milovanović DS, Popescu-Pelin G, Mihailescu IN. Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate. in Optics and Laser Technology. 2017;89:200-207.
doi:10.1016/j.optlastec.2016.10.015 .
Gaković, Biljana M., Petrović, Suzana, Albu, C., Zamfirescu, M., Panjan, Peter, Milovanović, Dubravka S., Popescu-Pelin, G., Mihailescu, Ion N., "Precise femtosecond laser crater fabrication in hard nanolayered AlTiN/TiN coating on steel substrate" in Optics and Laser Technology, 89 (2017):200-207,
https://doi.org/10.1016/j.optlastec.2016.10.015 . .
2
3
3

Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam

Kovacevic, Aleksander G.; Petrović, Suzana; Bokic, Bojana; Gaković, Biljana M.; Bokorov, Milos T.; Vasić, Borislav Z.; Gajic, Rados; Trtica, Milan; Jelenković, Branislav

(2015)

TY  - JOUR
AU  - Kovacevic, Aleksander G.
AU  - Petrović, Suzana
AU  - Bokic, Bojana
AU  - Gaković, Biljana M.
AU  - Bokorov, Milos T.
AU  - Vasić, Borislav Z.
AU  - Gajic, Rados
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/323
AB  - The effects of UV femtosecond laser beam with 76 MHz repetition rate on two types of thin films on Si substrate - the Al single layer thin film, and the multilayered thin film consisted of five Al/Ti bilayers (total thickness 130 nm) - were studied. The surface modification of the target was done by low fluences and different irradiation times, not exceeding similar to 300s. Nanopatterns in the form of femtosecond-laser induced periodic surface structures (fs-LIPSS) with periodicity of LT 315 nm and height of 45 nm were registered upon irradiation of the thin films. It was shown that: (i) the fs-LIPSS evolve from ruffles similar to high spatial frequency LIPSS (HSFL) into a low spatial frequency LIPSS (LSFL) if a certain threshold of the fluence is met, (ii) the number of LSFL increases with the exposition time and (iii) the LSFL remain stable even after long exposure times. We achieved high-quality highly-controllable fabrication of periodic structures on the surface of nanosized multilayer films with high-repetition-rate low-fluence femtosecond laser pulses. Compared to the Al single layer, the presence of the Ti underlayer in the Al/Ti multilayer thin film enabled more efficient heat transmittance through the Al/Ti interface away from the interaction zone which caused the reduction of the ablation effects leading to the formation of more regular LIPSS. The different outcomes of interactions with multi and single layer thin films lead to the conclusion that the behavior of the LIPSS is due to thin film structure. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam
VL  - 326
SP  - 91
EP  - 98
DO  - 10.1016/j.apsusc.2014.10.180
ER  - 
@article{
author = "Kovacevic, Aleksander G. and Petrović, Suzana and Bokic, Bojana and Gaković, Biljana M. and Bokorov, Milos T. and Vasić, Borislav Z. and Gajic, Rados and Trtica, Milan and Jelenković, Branislav",
year = "2015",
abstract = "The effects of UV femtosecond laser beam with 76 MHz repetition rate on two types of thin films on Si substrate - the Al single layer thin film, and the multilayered thin film consisted of five Al/Ti bilayers (total thickness 130 nm) - were studied. The surface modification of the target was done by low fluences and different irradiation times, not exceeding similar to 300s. Nanopatterns in the form of femtosecond-laser induced periodic surface structures (fs-LIPSS) with periodicity of LT 315 nm and height of 45 nm were registered upon irradiation of the thin films. It was shown that: (i) the fs-LIPSS evolve from ruffles similar to high spatial frequency LIPSS (HSFL) into a low spatial frequency LIPSS (LSFL) if a certain threshold of the fluence is met, (ii) the number of LSFL increases with the exposition time and (iii) the LSFL remain stable even after long exposure times. We achieved high-quality highly-controllable fabrication of periodic structures on the surface of nanosized multilayer films with high-repetition-rate low-fluence femtosecond laser pulses. Compared to the Al single layer, the presence of the Ti underlayer in the Al/Ti multilayer thin film enabled more efficient heat transmittance through the Al/Ti interface away from the interaction zone which caused the reduction of the ablation effects leading to the formation of more regular LIPSS. The different outcomes of interactions with multi and single layer thin films lead to the conclusion that the behavior of the LIPSS is due to thin film structure. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam",
volume = "326",
pages = "91-98",
doi = "10.1016/j.apsusc.2014.10.180"
}
Kovacevic, A. G., Petrović, S., Bokic, B., Gaković, B. M., Bokorov, M. T., Vasić, B. Z., Gajic, R., Trtica, M.,& Jelenković, B.. (2015). Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam. in Applied Surface Science, 326, 91-98.
https://doi.org/10.1016/j.apsusc.2014.10.180
Kovacevic AG, Petrović S, Bokic B, Gaković BM, Bokorov MT, Vasić BZ, Gajic R, Trtica M, Jelenković B. Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam. in Applied Surface Science. 2015;326:91-98.
doi:10.1016/j.apsusc.2014.10.180 .
Kovacevic, Aleksander G., Petrović, Suzana, Bokic, Bojana, Gaković, Biljana M., Bokorov, Milos T., Vasić, Borislav Z., Gajic, Rados, Trtica, Milan, Jelenković, Branislav, "Surface nanopatterning of Al/Ti multilayer thin films and Al single layer by a low-fluence UV femtosecond laser beam" in Applied Surface Science, 326 (2015):91-98,
https://doi.org/10.1016/j.apsusc.2014.10.180 . .
18
17
18

Femtosecond laser surface patterning of steel and titanium alloy

Milovanović, Dubravka S.; Gaković, Biljana M.; Radu, C.; Zamfirescu, M.; Radak, Bojan; Petrović, Suzana; Rogić Miladinović, Zorana; Mihailescu, Ion N.

(2014)

TY  - JOUR
AU  - Milovanović, Dubravka S.
AU  - Gaković, Biljana M.
AU  - Radu, C.
AU  - Zamfirescu, M.
AU  - Radak, Bojan
AU  - Petrović, Suzana
AU  - Rogić Miladinović, Zorana
AU  - Mihailescu, Ion N.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7058
AB  - In this work, we present the results obtained by femtosecond laser processing of AISI D2 steel and the widely applicable titanium-based alloy, Ti6Al4V. Patterning the materials surfaces was done by a Ti: sapphire system at 775 nm wavelength and 200 fs pulse duration, while varying the output pulse energies and the scanning speed. The formation of laser-induced periodical surface structures were found for both materials.
T2  - Physica Scripta
T1  - Femtosecond laser surface patterning of steel and titanium alloy
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014017
ER  - 
@article{
author = "Milovanović, Dubravka S. and Gaković, Biljana M. and Radu, C. and Zamfirescu, M. and Radak, Bojan and Petrović, Suzana and Rogić Miladinović, Zorana and Mihailescu, Ion N.",
year = "2014",
abstract = "In this work, we present the results obtained by femtosecond laser processing of AISI D2 steel and the widely applicable titanium-based alloy, Ti6Al4V. Patterning the materials surfaces was done by a Ti: sapphire system at 775 nm wavelength and 200 fs pulse duration, while varying the output pulse energies and the scanning speed. The formation of laser-induced periodical surface structures were found for both materials.",
journal = "Physica Scripta",
title = "Femtosecond laser surface patterning of steel and titanium alloy",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014017"
}
Milovanović, D. S., Gaković, B. M., Radu, C., Zamfirescu, M., Radak, B., Petrović, S., Rogić Miladinović, Z.,& Mihailescu, I. N.. (2014). Femtosecond laser surface patterning of steel and titanium alloy. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014017
Milovanović DS, Gaković BM, Radu C, Zamfirescu M, Radak B, Petrović S, Rogić Miladinović Z, Mihailescu IN. Femtosecond laser surface patterning of steel and titanium alloy. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014017 .
Milovanović, Dubravka S., Gaković, Biljana M., Radu, C., Zamfirescu, M., Radak, Bojan, Petrović, Suzana, Rogić Miladinović, Zorana, Mihailescu, Ion N., "Femtosecond laser surface patterning of steel and titanium alloy" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014017 . .
5
6
6

Multipulse nanosecond laser modification of steel surface

Chumakov, A. N.; Nikonchuk, I. S.; Gaković, Biljana M.; Petrović, Suzana; Trtica, Milan

(2014)

TY  - JOUR
AU  - Chumakov, A. N.
AU  - Nikonchuk, I. S.
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Trtica, Milan
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7057
AB  - Results of surface modification are presented for MnNiCrMo-steel samples exposed to a Nd:YAG laser operating in a pulse-periodic mode (10 Hz frequency, 532 nm wavelength and 17 ns pulse duration). The steel samples were irradiated in air by a series of laser pulses at a fluence of 10.7 J cm(-2) close to a plasma formation threshold. Surface structures were examined by optical, scanning electron and confocal optical microscopy. The appearance of the detected surface structures strongly depends on the number of laser pulses and power density of laser radiation. Significant differences were found between laser-induced structures in the center of the laser spot, at its edges and in the nearest surrounding of the laser spot. The reasons for such differences are discussed.
T2  - Physica Scripta
T1  - Multipulse nanosecond laser modification of steel surface
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014016
ER  - 
@article{
author = "Chumakov, A. N. and Nikonchuk, I. S. and Gaković, Biljana M. and Petrović, Suzana and Trtica, Milan",
year = "2014",
abstract = "Results of surface modification are presented for MnNiCrMo-steel samples exposed to a Nd:YAG laser operating in a pulse-periodic mode (10 Hz frequency, 532 nm wavelength and 17 ns pulse duration). The steel samples were irradiated in air by a series of laser pulses at a fluence of 10.7 J cm(-2) close to a plasma formation threshold. Surface structures were examined by optical, scanning electron and confocal optical microscopy. The appearance of the detected surface structures strongly depends on the number of laser pulses and power density of laser radiation. Significant differences were found between laser-induced structures in the center of the laser spot, at its edges and in the nearest surrounding of the laser spot. The reasons for such differences are discussed.",
journal = "Physica Scripta",
title = "Multipulse nanosecond laser modification of steel surface",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014016"
}
Chumakov, A. N., Nikonchuk, I. S., Gaković, B. M., Petrović, S.,& Trtica, M.. (2014). Multipulse nanosecond laser modification of steel surface. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014016
Chumakov AN, Nikonchuk IS, Gaković BM, Petrović S, Trtica M. Multipulse nanosecond laser modification of steel surface. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014016 .
Chumakov, A. N., Nikonchuk, I. S., Gaković, Biljana M., Petrović, Suzana, Trtica, Milan, "Multipulse nanosecond laser modification of steel surface" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014016 . .
3
1

Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses

Petrović, Suzana; Peruško, Davor; Kovač, Janez; Siketic, Z.; Bogdanović-Radović, Ivančica; Gaković, Biljana M.; Radak, Bojan; Trtica, Milan

(2014)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Kovač, Janez
AU  - Siketic, Z.
AU  - Bogdanović-Radović, Ivančica
AU  - Gaković, Biljana M.
AU  - Radak, Bojan
AU  - Trtica, Milan
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5842
AB  - The surface oxidation of Ni/Ti bilayer, deposited on silicon substrate, affected by picosecond Nd: YAG laser radiation has been investigated. Fluence close to the target ablation threshold and multi-pulse laser irradiation regime were applied. Changes in the chemical composition of the formed surface oxide layer were studied by Elastic Recoil Detection Analysis (ERDA) and X-ray photoelectron spectroscopy (XPS). Morphological features analysis, at the oxide surface layer, was monitored, too. Laser modification as-deposited (Ni/Ti)/Si sample with 10 pulses induces a progressed interaction between Ni and Ti layers with the initial surface oxidation and formation of NiTi alloy phase. Progressed intermixing of components was achieved for the irradiation with 50 and more pulses, when all components were quite uniformly distributed to a depth of about 80 nm. An oxide layer was formed at the surface, with the specific combination of the oxide phases depending on the number of accumulated pulses. Changes in the morphological characteristics are reflected in the increase of the mean surface roughness and the generation of a certain number of cavities. These features are decreased with increasing number of pulses, caused by the surface melting and a pronounced mobility of the materials. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses
VL  - 143
IS  - 2
SP  - 530
EP  - 535
DO  - 10.1016/j.matchemphys.2013.09.021
ER  - 
@article{
author = "Petrović, Suzana and Peruško, Davor and Kovač, Janez and Siketic, Z. and Bogdanović-Radović, Ivančica and Gaković, Biljana M. and Radak, Bojan and Trtica, Milan",
year = "2014",
abstract = "The surface oxidation of Ni/Ti bilayer, deposited on silicon substrate, affected by picosecond Nd: YAG laser radiation has been investigated. Fluence close to the target ablation threshold and multi-pulse laser irradiation regime were applied. Changes in the chemical composition of the formed surface oxide layer were studied by Elastic Recoil Detection Analysis (ERDA) and X-ray photoelectron spectroscopy (XPS). Morphological features analysis, at the oxide surface layer, was monitored, too. Laser modification as-deposited (Ni/Ti)/Si sample with 10 pulses induces a progressed interaction between Ni and Ti layers with the initial surface oxidation and formation of NiTi alloy phase. Progressed intermixing of components was achieved for the irradiation with 50 and more pulses, when all components were quite uniformly distributed to a depth of about 80 nm. An oxide layer was formed at the surface, with the specific combination of the oxide phases depending on the number of accumulated pulses. Changes in the morphological characteristics are reflected in the increase of the mean surface roughness and the generation of a certain number of cavities. These features are decreased with increasing number of pulses, caused by the surface melting and a pronounced mobility of the materials. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses",
volume = "143",
number = "2",
pages = "530-535",
doi = "10.1016/j.matchemphys.2013.09.021"
}
Petrović, S., Peruško, D., Kovač, J., Siketic, Z., Bogdanović-Radović, I., Gaković, B. M., Radak, B.,& Trtica, M.. (2014). Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses. in Materials Chemistry and Physics, 143(2), 530-535.
https://doi.org/10.1016/j.matchemphys.2013.09.021
Petrović S, Peruško D, Kovač J, Siketic Z, Bogdanović-Radović I, Gaković BM, Radak B, Trtica M. Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses. in Materials Chemistry and Physics. 2014;143(2):530-535.
doi:10.1016/j.matchemphys.2013.09.021 .
Petrović, Suzana, Peruško, Davor, Kovač, Janez, Siketic, Z., Bogdanović-Radović, Ivančica, Gaković, Biljana M., Radak, Bojan, Trtica, Milan, "Laser-induced surface oxidation of (Ni/Ti)/Si system with picosecond laser pulses" in Materials Chemistry and Physics, 143, no. 2 (2014):530-535,
https://doi.org/10.1016/j.matchemphys.2013.09.021 . .
6
5
5

Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film

Gaković, Biljana M.; Petrović, Suzana; Krmpot, Aleksandar J.; Pantelić, Dejan; Jelenković, Branislav; Stratakis, E.; Fotakis, C.

(2014)

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Petrović, Suzana
AU  - Krmpot, Aleksandar J.
AU  - Pantelić, Dejan
AU  - Jelenković, Branislav
AU  - Stratakis, E.
AU  - Fotakis, C.
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/228
AB  - In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.
T2  - Laser and Particle Beams
T1  - Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film
VL  - 32
IS  - 4
SP  - 613
EP  - 619
DO  - 10.1017/S0263034614000627
ER  - 
@article{
author = "Gaković, Biljana M. and Petrović, Suzana and Krmpot, Aleksandar J. and Pantelić, Dejan and Jelenković, Branislav and Stratakis, E. and Fotakis, C.",
year = "2014",
abstract = "In this work we reported low and high repetition frequency femtosecond laser- induced modifications of tungsten-based thin film. The tungsten-titanium (WTi) thin film, thickness of 190 nm, was deposited by sputtering on single crystal Si (100) wafer. Irradiations were performed in air by linearly polarized and focused femtosecond laser beams with following parameters: (1) pulse duration 160 fs, wavelength 800 nm, laser repetition frequency (LRF) 75 MHz - high LRF, and (2) duration 40 fs, wavelength 800 nm, LRF of 1 kHz - low LRF. The results of femtosecond lasers processing of the WTi thin film revealed laser induced periodical surface structures (LIPSS) in the case of low LRF regime. LIPSSs were formed with different periodicity and different orientation to the laser polarization at the surface: micro-scale LIPSSs with orientation perpendicular to the laser polarization and nano-scale LIPSSs parallel and perpendicular to the laser polarization. After processing of the WTi/Si system in high LRF regime ablation and nanoparticles formation were registered.",
journal = "Laser and Particle Beams",
title = "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film",
volume = "32",
number = "4",
pages = "613-619",
doi = "10.1017/S0263034614000627"
}
Gaković, B. M., Petrović, S., Krmpot, A. J., Pantelić, D., Jelenković, B., Stratakis, E.,& Fotakis, C.. (2014). Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams, 32(4), 613-619.
https://doi.org/10.1017/S0263034614000627
Gaković BM, Petrović S, Krmpot AJ, Pantelić D, Jelenković B, Stratakis E, Fotakis C. Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film. in Laser and Particle Beams. 2014;32(4):613-619.
doi:10.1017/S0263034614000627 .
Gaković, Biljana M., Petrović, Suzana, Krmpot, Aleksandar J., Pantelić, Dejan, Jelenković, Branislav, Stratakis, E., Fotakis, C., "Low and high repetition frequency femtosecond lasers processing of tungsten-based thin film" in Laser and Particle Beams, 32, no. 4 (2014):613-619,
https://doi.org/10.1017/S0263034614000627 . .

Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure

Petrović, Suzana; Gaković, Biljana M.; Kovač, Janez; Panjan, Peter; Stratakis, E.; Trtica, Milan; Fotakis, C.; Jelenković, Branislav

(2014)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Gaković, Biljana M.
AU  - Kovač, Janez
AU  - Panjan, Peter
AU  - Stratakis, E.
AU  - Trtica, Milan
AU  - Fotakis, C.
AU  - Jelenković, Branislav
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/103
AB  - The conditions of ultra-thin oxide films synthesized as the Al/Fe multilayer structures after the surface treatment with femtosecond laser radiation were studied. Thin films composed of three (Al/Fe) bilayers were deposited by DC ion sputtering on (100) Si wafers to the total thickness of 410 nm. Laser irradiations were performed by 40-fs pulses of a Ti:Sapphire laser operating at 800 nm, at fluences slightly higher than the ablation threshold. The samples were characterized by Auger electron spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. Progressed intermixing of components was achieved for the irradiation with fluence of 0.43 J cm(-2), when intermetallic phase was formed and all components were almost uniformly distributed through the entire multilayer structure. Exception is the subsurface region, to the thickness of 20 nm, where the distribution of constructive components and their oxide is changing with the distance from the surface, and this distribution depends on the applied laser fluences. An ultra-thin oxide layer was formed at the surface, with the specific combination of the oxide phases, Al2O3 and Fe2O3, depending on the applied fluences. Laser-induced modification was accompanied with the ablation of the material and the creation of parallel periodic structures. These effects of laser-induced morphological features are increased with increasing laser fluences, caused by the pronounced mobility of the materials. The special morphology of the laser-assisted synthesis of mixture of Al2O3 and Fe2O3 in the form of an ultra-thin oxide layer can improve their characteristics for functional applications, as catalysts and sensors.
T2  - Journal of Materials Science
T1  - Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure
VL  - 49
IS  - 22
SP  - 7900
EP  - 7907
DO  - 10.1007/s10853-014-8502-y
ER  - 
@article{
author = "Petrović, Suzana and Gaković, Biljana M. and Kovač, Janez and Panjan, Peter and Stratakis, E. and Trtica, Milan and Fotakis, C. and Jelenković, Branislav",
year = "2014",
abstract = "The conditions of ultra-thin oxide films synthesized as the Al/Fe multilayer structures after the surface treatment with femtosecond laser radiation were studied. Thin films composed of three (Al/Fe) bilayers were deposited by DC ion sputtering on (100) Si wafers to the total thickness of 410 nm. Laser irradiations were performed by 40-fs pulses of a Ti:Sapphire laser operating at 800 nm, at fluences slightly higher than the ablation threshold. The samples were characterized by Auger electron spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. Progressed intermixing of components was achieved for the irradiation with fluence of 0.43 J cm(-2), when intermetallic phase was formed and all components were almost uniformly distributed through the entire multilayer structure. Exception is the subsurface region, to the thickness of 20 nm, where the distribution of constructive components and their oxide is changing with the distance from the surface, and this distribution depends on the applied laser fluences. An ultra-thin oxide layer was formed at the surface, with the specific combination of the oxide phases, Al2O3 and Fe2O3, depending on the applied fluences. Laser-induced modification was accompanied with the ablation of the material and the creation of parallel periodic structures. These effects of laser-induced morphological features are increased with increasing laser fluences, caused by the pronounced mobility of the materials. The special morphology of the laser-assisted synthesis of mixture of Al2O3 and Fe2O3 in the form of an ultra-thin oxide layer can improve their characteristics for functional applications, as catalysts and sensors.",
journal = "Journal of Materials Science",
title = "Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure",
volume = "49",
number = "22",
pages = "7900-7907",
doi = "10.1007/s10853-014-8502-y"
}
Petrović, S., Gaković, B. M., Kovač, J., Panjan, P., Stratakis, E., Trtica, M., Fotakis, C.,& Jelenković, B.. (2014). Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure. in Journal of Materials Science, 49(22), 7900-7907.
https://doi.org/10.1007/s10853-014-8502-y
Petrović S, Gaković BM, Kovač J, Panjan P, Stratakis E, Trtica M, Fotakis C, Jelenković B. Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure. in Journal of Materials Science. 2014;49(22):7900-7907.
doi:10.1007/s10853-014-8502-y .
Petrović, Suzana, Gaković, Biljana M., Kovač, Janez, Panjan, Peter, Stratakis, E., Trtica, Milan, Fotakis, C., Jelenković, Branislav, "Synthesis of ultra-thin oxide layer in laser-treated 3x (Al/Fe)/Si multilayer structure" in Journal of Materials Science, 49, no. 22 (2014):7900-7907,
https://doi.org/10.1007/s10853-014-8502-y . .
1
2
2

Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films

Petrović, Suzana; Gaković, Biljana M.; Peruško, Davor; Stratakis, E.; Bogdanović-Radović, Ivančica; Čekada, Miha; Fotakis, C.; Jelenković, Branislav

(2013)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Gaković, Biljana M.
AU  - Peruško, Davor
AU  - Stratakis, E.
AU  - Bogdanović-Radović, Ivančica
AU  - Čekada, Miha
AU  - Fotakis, C.
AU  - Jelenković, Branislav
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5819
AB  - Laser-induced periodic surface structures (LIPSSs) and chemical composition changes of Ti-based nanolayered thin films (Al/Ti, Ni/Ti) after femtosecond (fs) laser pulses action were studied. Irradiation is performed using linearly polarized Ti:Sapphire fs laser pulses of 40 fs pulse duration and 800 nm wavelength. The low spatial frequency LIPSS (LSFL), oriented perpendicular to the laser polarization with periods slightly lower than the irradiation wavelength, was typically formed at elevated laser fluences. On the contrary, high spatial frequency LIPSS (HSFL) with uniform period of 155 nm, parallel to the laser light polarization, appeared at low laser fluences, as well as in the wings of the Gaussian laser beam distribution for higher used fluence. LSFL formation was associated with the material ablation process and accompanied by the intense formation of nanoparticles, especially in the Ni/Ti system. The composition changes at the surface of both multilayer systems in the LSFL area indicated the intermixing between layers and the substrate. Concentration and distribution of all constitutive elements in the irradiated area with formed HSFLs were almost unchanged. (C) 2013 AIP Publishing LLC.
T2  - Journal of Applied Physics
T1  - Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films
VL  - 114
IS  - 23
DO  - 10.1063/1.4848016
ER  - 
@article{
author = "Petrović, Suzana and Gaković, Biljana M. and Peruško, Davor and Stratakis, E. and Bogdanović-Radović, Ivančica and Čekada, Miha and Fotakis, C. and Jelenković, Branislav",
year = "2013",
abstract = "Laser-induced periodic surface structures (LIPSSs) and chemical composition changes of Ti-based nanolayered thin films (Al/Ti, Ni/Ti) after femtosecond (fs) laser pulses action were studied. Irradiation is performed using linearly polarized Ti:Sapphire fs laser pulses of 40 fs pulse duration and 800 nm wavelength. The low spatial frequency LIPSS (LSFL), oriented perpendicular to the laser polarization with periods slightly lower than the irradiation wavelength, was typically formed at elevated laser fluences. On the contrary, high spatial frequency LIPSS (HSFL) with uniform period of 155 nm, parallel to the laser light polarization, appeared at low laser fluences, as well as in the wings of the Gaussian laser beam distribution for higher used fluence. LSFL formation was associated with the material ablation process and accompanied by the intense formation of nanoparticles, especially in the Ni/Ti system. The composition changes at the surface of both multilayer systems in the LSFL area indicated the intermixing between layers and the substrate. Concentration and distribution of all constitutive elements in the irradiated area with formed HSFLs were almost unchanged. (C) 2013 AIP Publishing LLC.",
journal = "Journal of Applied Physics",
title = "Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films",
volume = "114",
number = "23",
doi = "10.1063/1.4848016"
}
Petrović, S., Gaković, B. M., Peruško, D., Stratakis, E., Bogdanović-Radović, I., Čekada, M., Fotakis, C.,& Jelenković, B.. (2013). Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films. in Journal of Applied Physics, 114(23).
https://doi.org/10.1063/1.4848016
Petrović S, Gaković BM, Peruško D, Stratakis E, Bogdanović-Radović I, Čekada M, Fotakis C, Jelenković B. Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films. in Journal of Applied Physics. 2013;114(23).
doi:10.1063/1.4848016 .
Petrović, Suzana, Gaković, Biljana M., Peruško, Davor, Stratakis, E., Bogdanović-Radović, Ivančica, Čekada, Miha, Fotakis, C., Jelenković, Branislav, "Femtosecond laser-induced periodic surface structure on the Ti-based nanolayered thin films" in Journal of Applied Physics, 114, no. 23 (2013),
https://doi.org/10.1063/1.4848016 . .
26
24
24

Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions

Petrović, Suzana; Peruško, Davor; Salatić, Branislav; Bogdanović-Radović, Ivančica; Panjan, Peter; Gaković, Biljana M.; Pantelić, Dejan; Trtica, Milan; Jelenković, Branislav

(2013)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Salatić, Branislav
AU  - Bogdanović-Radović, Ivančica
AU  - Panjan, Peter
AU  - Gaković, Biljana M.
AU  - Pantelić, Dejan
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5661
AB  - A study of morphological and composition changes of the (8(Al/Ti)/Si) system induced by laser pulses in different ambient conditions is presented. The effects of an Er, Yb, Cr-Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns, on a complex target were investigated. Irradiation of 8(Al/Ti)/Si was carried out at intensities of 5.9 and 9.5 x 10(11) W m(-2) in air, water and ethanol. The laser-induced morphological and composition modifications have shown dependence on applied intensities, number of laser pulses and ambient conditions. The following morphological changes were observed: (i) intense surface melting of the thin film and Si-substrate; (ii) ablation/exfoliation of the 8(Al/Ti) multilayer thin film from Si, (iii) appearance of hydrodynamic features such as resolidified material, and (iv) formation of crater at multi-pulse action. The formation of parallel periodic surface structure was only occurring in single pulse air-assisted modification. Analysis of the composition revealed that laser modification induced intermixing between the components of individual Al and Ti layers with potential formation of AlTi intermetallic compounds. (C) 2013 Elsevier Ltd. All rights reserved.
T2  - Optics and Laser Technology
T1  - Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions
VL  - 54
SP  - 22
EP  - 29
DO  - 10.1016/j.optlastec.2013.04.030
ER  - 
@article{
author = "Petrović, Suzana and Peruško, Davor and Salatić, Branislav and Bogdanović-Radović, Ivančica and Panjan, Peter and Gaković, Biljana M. and Pantelić, Dejan and Trtica, Milan and Jelenković, Branislav",
year = "2013",
abstract = "A study of morphological and composition changes of the (8(Al/Ti)/Si) system induced by laser pulses in different ambient conditions is presented. The effects of an Er, Yb, Cr-Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns, on a complex target were investigated. Irradiation of 8(Al/Ti)/Si was carried out at intensities of 5.9 and 9.5 x 10(11) W m(-2) in air, water and ethanol. The laser-induced morphological and composition modifications have shown dependence on applied intensities, number of laser pulses and ambient conditions. The following morphological changes were observed: (i) intense surface melting of the thin film and Si-substrate; (ii) ablation/exfoliation of the 8(Al/Ti) multilayer thin film from Si, (iii) appearance of hydrodynamic features such as resolidified material, and (iv) formation of crater at multi-pulse action. The formation of parallel periodic surface structure was only occurring in single pulse air-assisted modification. Analysis of the composition revealed that laser modification induced intermixing between the components of individual Al and Ti layers with potential formation of AlTi intermetallic compounds. (C) 2013 Elsevier Ltd. All rights reserved.",
journal = "Optics and Laser Technology",
title = "Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions",
volume = "54",
pages = "22-29",
doi = "10.1016/j.optlastec.2013.04.030"
}
Petrović, S., Peruško, D., Salatić, B., Bogdanović-Radović, I., Panjan, P., Gaković, B. M., Pantelić, D., Trtica, M.,& Jelenković, B.. (2013). Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions. in Optics and Laser Technology, 54, 22-29.
https://doi.org/10.1016/j.optlastec.2013.04.030
Petrović S, Peruško D, Salatić B, Bogdanović-Radović I, Panjan P, Gaković BM, Pantelić D, Trtica M, Jelenković B. Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions. in Optics and Laser Technology. 2013;54:22-29.
doi:10.1016/j.optlastec.2013.04.030 .
Petrović, Suzana, Peruško, Davor, Salatić, Branislav, Bogdanović-Radović, Ivančica, Panjan, Peter, Gaković, Biljana M., Pantelić, Dejan, Trtica, Milan, Jelenković, Branislav, "Laser induced damage/ablation morphology on the 8(Al/Ti)/Si system in different ambient conditions" in Optics and Laser Technology, 54 (2013):22-29,
https://doi.org/10.1016/j.optlastec.2013.04.030 . .
6
7
10

Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids

Petrović, Suzana; Salatić, Branislav; Peruško, Davor; Bogdanović-Radović, Ivančica; Cekada, Miha; Gaković, Biljana M.; Pantelić, Dejan; Trtica, Milan; Jelenković, Branislav

(2013)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Salatić, Branislav
AU  - Peruško, Davor
AU  - Bogdanović-Radović, Ivančica
AU  - Cekada, Miha
AU  - Gaković, Biljana M.
AU  - Pantelić, Dejan
AU  - Trtica, Milan
AU  - Jelenković, Branislav
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5456
AB  - The interaction of an Er, Yb, Cr-glass laser, operating at 1540 nm wavelength and a pulse duration of 40 ns, with Ni/Ti multilayer thin films has been studied. Five (Ni/Ti) bilayers deposited by DC ion sputtering on Si(100) wafers to a total thickness of about 180 nm were treated with laser fluences of about 6.4 and 8.8 J cm(-2). Single and multi-pulse laser irradiation was done at normal incidence in air, water and ethanol ambients. The composition and surface morphology were monitored by particle-induced x-ray emission, Rutherford backscattering spectrometry (RBS), scanning electron microscopy and profilometry. Most of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the target surface. The results show an increase in surface roughness, formation of parallel periodic surface structures, appearance of hydrodynamic features and ablation of surface material. RBS analysis revealed that laser modification induced inter-mixing between the components of individual Ni and Ti layers, with indications of the formation of NiTi intermetallic compounds. An interesting finding is the morphological changes dominant in the Si substrate, whereas the Ni/Ti multilayer structure has mainly undergone changes in the chemical composition.
T2  - Laser Physics
T1  - Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids
VL  - 23
IS  - 2
DO  - 10.1088/1054-660X/23/2/026004
ER  - 
@article{
author = "Petrović, Suzana and Salatić, Branislav and Peruško, Davor and Bogdanović-Radović, Ivančica and Cekada, Miha and Gaković, Biljana M. and Pantelić, Dejan and Trtica, Milan and Jelenković, Branislav",
year = "2013",
abstract = "The interaction of an Er, Yb, Cr-glass laser, operating at 1540 nm wavelength and a pulse duration of 40 ns, with Ni/Ti multilayer thin films has been studied. Five (Ni/Ti) bilayers deposited by DC ion sputtering on Si(100) wafers to a total thickness of about 180 nm were treated with laser fluences of about 6.4 and 8.8 J cm(-2). Single and multi-pulse laser irradiation was done at normal incidence in air, water and ethanol ambients. The composition and surface morphology were monitored by particle-induced x-ray emission, Rutherford backscattering spectrometry (RBS), scanning electron microscopy and profilometry. Most of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the target surface. The results show an increase in surface roughness, formation of parallel periodic surface structures, appearance of hydrodynamic features and ablation of surface material. RBS analysis revealed that laser modification induced inter-mixing between the components of individual Ni and Ti layers, with indications of the formation of NiTi intermetallic compounds. An interesting finding is the morphological changes dominant in the Si substrate, whereas the Ni/Ti multilayer structure has mainly undergone changes in the chemical composition.",
journal = "Laser Physics",
title = "Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids",
volume = "23",
number = "2",
doi = "10.1088/1054-660X/23/2/026004"
}
Petrović, S., Salatić, B., Peruško, D., Bogdanović-Radović, I., Cekada, M., Gaković, B. M., Pantelić, D., Trtica, M.,& Jelenković, B.. (2013). Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids. in Laser Physics, 23(2).
https://doi.org/10.1088/1054-660X/23/2/026004
Petrović S, Salatić B, Peruško D, Bogdanović-Radović I, Cekada M, Gaković BM, Pantelić D, Trtica M, Jelenković B. Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids. in Laser Physics. 2013;23(2).
doi:10.1088/1054-660X/23/2/026004 .
Petrović, Suzana, Salatić, Branislav, Peruško, Davor, Bogdanović-Radović, Ivančica, Cekada, Miha, Gaković, Biljana M., Pantelić, Dejan, Trtica, Milan, Jelenković, Branislav, "Laser-induced structural and composition modification of multilayered Ni/Ti thin film in air and liquids" in Laser Physics, 23, no. 2 (2013),
https://doi.org/10.1088/1054-660X/23/2/026004 . .

Laser-induced surface alloying in nanosized Ni/Ti multilayer structures

Petrović, Suzana; Radak, Bojan; Peruško, Davor; Pelicon, P.; Kovač, Janez; Mitrić, Miodrag; Gaković, Biljana M.; Trtica, Milan

(2013)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Radak, Bojan
AU  - Peruško, Davor
AU  - Pelicon, P.
AU  - Kovač, Janez
AU  - Mitrić, Miodrag
AU  - Gaković, Biljana M.
AU  - Trtica, Milan
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5187
AB  - Laser-induced alloying effects on the composition and structure of different Ni/Ti multilayer structures were studied. Thin films composed of one, five, and ten (Ni/Ti) bilayers were deposited by DC ion sputtering on (1 0 0) Si wafers. Laser irradiations were performed by 150 ps pulses of a Nd:YAG laser operating at 1064 nm. The samples were characterized by Rutherford backscattering spectrometry (RBS), Auger electron spectroscopy (AES), X-ray diffraction (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). At a laser fluence of 0.9 J cm(-2), interaction between Ni and Ti layers was initiated, and NiTi alloy formed in 5- and 10-bilayered samples. Progressed alloying was achieved at a laser fluence of 1.2 J cm(-2). The alloy was formed mostly within the heat affected zone (HAZ) of the sample. Surface segregation of titanium was followed by formation of a 25 nm thin TiO2 film on the surface of the multilayered structures. In addition, parallel periodic surface structures on the surfaces of the 5- and 10-bilayered samples were clearly recorded. Their period in the case of the 5-bilayered system (0.77 mu m) agrees very well with the predictions of the common theory, whereas, in the case of the 10-bilayered system, two periods of such structures are observed (1.43 mu m and 0.4 mu m), and none of them coincides with the prediction. (C) 2012 Elsevier B. V. All rights reserved.
T2  - Applied Surface Science
T1  - Laser-induced surface alloying in nanosized Ni/Ti multilayer structures
VL  - 264
SP  - 273
EP  - 279
DO  - 10.1016/j.apsusc.2012.10.012
ER  - 
@article{
author = "Petrović, Suzana and Radak, Bojan and Peruško, Davor and Pelicon, P. and Kovač, Janez and Mitrić, Miodrag and Gaković, Biljana M. and Trtica, Milan",
year = "2013",
abstract = "Laser-induced alloying effects on the composition and structure of different Ni/Ti multilayer structures were studied. Thin films composed of one, five, and ten (Ni/Ti) bilayers were deposited by DC ion sputtering on (1 0 0) Si wafers. Laser irradiations were performed by 150 ps pulses of a Nd:YAG laser operating at 1064 nm. The samples were characterized by Rutherford backscattering spectrometry (RBS), Auger electron spectroscopy (AES), X-ray diffraction (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). At a laser fluence of 0.9 J cm(-2), interaction between Ni and Ti layers was initiated, and NiTi alloy formed in 5- and 10-bilayered samples. Progressed alloying was achieved at a laser fluence of 1.2 J cm(-2). The alloy was formed mostly within the heat affected zone (HAZ) of the sample. Surface segregation of titanium was followed by formation of a 25 nm thin TiO2 film on the surface of the multilayered structures. In addition, parallel periodic surface structures on the surfaces of the 5- and 10-bilayered samples were clearly recorded. Their period in the case of the 5-bilayered system (0.77 mu m) agrees very well with the predictions of the common theory, whereas, in the case of the 10-bilayered system, two periods of such structures are observed (1.43 mu m and 0.4 mu m), and none of them coincides with the prediction. (C) 2012 Elsevier B. V. All rights reserved.",
journal = "Applied Surface Science",
title = "Laser-induced surface alloying in nanosized Ni/Ti multilayer structures",
volume = "264",
pages = "273-279",
doi = "10.1016/j.apsusc.2012.10.012"
}
Petrović, S., Radak, B., Peruško, D., Pelicon, P., Kovač, J., Mitrić, M., Gaković, B. M.,& Trtica, M.. (2013). Laser-induced surface alloying in nanosized Ni/Ti multilayer structures. in Applied Surface Science, 264, 273-279.
https://doi.org/10.1016/j.apsusc.2012.10.012
Petrović S, Radak B, Peruško D, Pelicon P, Kovač J, Mitrić M, Gaković BM, Trtica M. Laser-induced surface alloying in nanosized Ni/Ti multilayer structures. in Applied Surface Science. 2013;264:273-279.
doi:10.1016/j.apsusc.2012.10.012 .
Petrović, Suzana, Radak, Bojan, Peruško, Davor, Pelicon, P., Kovač, Janez, Mitrić, Miodrag, Gaković, Biljana M., Trtica, Milan, "Laser-induced surface alloying in nanosized Ni/Ti multilayer structures" in Applied Surface Science, 264 (2013):273-279,
https://doi.org/10.1016/j.apsusc.2012.10.012 . .
15
15
15

Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum

Trtica, Milan; Batani, D.; Redaelli, R.; Limpouch, Jiri; Kmetik, V.; Ciganović, Jovan; Stašić, Jelena M.; Gaković, Biljana M.; Momčilović, Miloš

(2013)

TY  - JOUR
AU  - Trtica, Milan
AU  - Batani, D.
AU  - Redaelli, R.
AU  - Limpouch, Jiri
AU  - Kmetik, V.
AU  - Ciganović, Jovan
AU  - Stašić, Jelena M.
AU  - Gaković, Biljana M.
AU  - Momčilović, Miloš
PY  - 2013
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5339
AB  - The response of titanium surface irradiated with high intensity (10(13) - 10(15) W/cm(2)) Ti:sapphire laser was studied in vacuum. Most of the reported investigations were conducted with nano- to femtosecond lasers in gas atmospheres while the studies of titanium surface interacting with femtosecond laser in vacuum are scarce. The laser employed in our experiment was operating at 800 nm wavelength and pulse duration of 60 fs in single pulse regime. The observed surface changes and phenomena are (1) creation of craters, (2) formation of periodic surface structures at the reduced intensity, and (3) occurrence of plasma in front the target. Since microstructuring of titanium is very interesting in many areas (industry, medicine), it can be concluded from this study that the reported laser intensities can effectively be applied for micromachining of the titanium surface (increasing the roughness, formation of parallel periodic surface structures etc.).
T2  - Laser and Particle Beams
T1  - Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum
VL  - 31
IS  - 1
SP  - 29
EP  - 36
DO  - 10.1017/S0263034612000924
ER  - 
@article{
author = "Trtica, Milan and Batani, D. and Redaelli, R. and Limpouch, Jiri and Kmetik, V. and Ciganović, Jovan and Stašić, Jelena M. and Gaković, Biljana M. and Momčilović, Miloš",
year = "2013",
abstract = "The response of titanium surface irradiated with high intensity (10(13) - 10(15) W/cm(2)) Ti:sapphire laser was studied in vacuum. Most of the reported investigations were conducted with nano- to femtosecond lasers in gas atmospheres while the studies of titanium surface interacting with femtosecond laser in vacuum are scarce. The laser employed in our experiment was operating at 800 nm wavelength and pulse duration of 60 fs in single pulse regime. The observed surface changes and phenomena are (1) creation of craters, (2) formation of periodic surface structures at the reduced intensity, and (3) occurrence of plasma in front the target. Since microstructuring of titanium is very interesting in many areas (industry, medicine), it can be concluded from this study that the reported laser intensities can effectively be applied for micromachining of the titanium surface (increasing the roughness, formation of parallel periodic surface structures etc.).",
journal = "Laser and Particle Beams",
title = "Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum",
volume = "31",
number = "1",
pages = "29-36",
doi = "10.1017/S0263034612000924"
}
Trtica, M., Batani, D., Redaelli, R., Limpouch, J., Kmetik, V., Ciganović, J., Stašić, J. M., Gaković, B. M.,& Momčilović, M.. (2013). Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum. in Laser and Particle Beams, 31(1), 29-36.
https://doi.org/10.1017/S0263034612000924
Trtica M, Batani D, Redaelli R, Limpouch J, Kmetik V, Ciganović J, Stašić JM, Gaković BM, Momčilović M. Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum. in Laser and Particle Beams. 2013;31(1):29-36.
doi:10.1017/S0263034612000924 .
Trtica, Milan, Batani, D., Redaelli, R., Limpouch, Jiri, Kmetik, V., Ciganović, Jovan, Stašić, Jelena M., Gaković, Biljana M., Momčilović, Miloš, "Titanium surface modification using femtosecond laser with 10(13)-10(15) W/cm(2) intensity in vacuum" in Laser and Particle Beams, 31, no. 1 (2013):29-36,
https://doi.org/10.1017/S0263034612000924 . .
15
16
15

Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser

Petrović, Suzana; Peruško, Davor; Radović-Bogdanović, I.; Branković, Goran O.; Čekada, Miha; Gaković, Biljana M.; Jaksic, M.; Trtica, Milan; Milosavljević, Momir

(2012)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Radović-Bogdanović, I.
AU  - Branković, Goran O.
AU  - Čekada, Miha
AU  - Gaković, Biljana M.
AU  - Jaksic, M.
AU  - Trtica, Milan
AU  - Milosavljević, Momir
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4912
AB  - In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.
T2  - Metals and Materials International
T1  - Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser
VL  - 18
IS  - 3
SP  - 457
EP  - 463
DO  - 10.1007/s12540-012-3012-4
ER  - 
@article{
author = "Petrović, Suzana and Peruško, Davor and Radović-Bogdanović, I. and Branković, Goran O. and Čekada, Miha and Gaković, Biljana M. and Jaksic, M. and Trtica, Milan and Milosavljević, Momir",
year = "2012",
abstract = "In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% W-Ti target, using Ar ions, to a thickness of similar to 190 nm. Irradiation was performed with a pulsed Nd:YAG laser operating at 1064 nm, whereas the pulse duration was 150 ps. Laser fluences of 3.2 and 5.9 J/cm(2) were found to be sufficient for modification of the WTi/silicon target system. The results show: (i) ablation of WTi thin film and a Si substrate in the central zone of spots, (ii) appearance of hydrodynamic features like resolidified material, (iii) partial ablation of the WTi thin film at the periphery and (iv) appearance of thin film cracks at the far periphery. On the non-ablated areas, the laser modification induced changes in composition, such as inter-mixing of components at the WTi/Si interface with formation of silicides in both metals. Surface oxidation was the dominant process in the ablated areas, which is demonstrated by the presence of a SiO2 phase.",
journal = "Metals and Materials International",
title = "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser",
volume = "18",
number = "3",
pages = "457-463",
doi = "10.1007/s12540-012-3012-4"
}
Petrović, S., Peruško, D., Radović-Bogdanović, I., Branković, G. O., Čekada, M., Gaković, B. M., Jaksic, M., Trtica, M.,& Milosavljević, M.. (2012). Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International, 18(3), 457-463.
https://doi.org/10.1007/s12540-012-3012-4
Petrović S, Peruško D, Radović-Bogdanović I, Branković GO, Čekada M, Gaković BM, Jaksic M, Trtica M, Milosavljević M. Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser. in Metals and Materials International. 2012;18(3):457-463.
doi:10.1007/s12540-012-3012-4 .
Petrović, Suzana, Peruško, Davor, Radović-Bogdanović, I., Branković, Goran O., Čekada, Miha, Gaković, Biljana M., Jaksic, M., Trtica, Milan, Milosavljević, Momir, "Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser" in Metals and Materials International, 18, no. 3 (2012):457-463,
https://doi.org/10.1007/s12540-012-3012-4 . .
1
1
1

The electron number density of argon-nitrogen atmospheric pressure plasma

Ranković, D.P.; Kuzmanović, Miroslav M.; Gaković, Biljana M.; Pavlović, Mirjana S.; Stoiljković, Milovan; Savović, Jelena

(Society of Physical Chemists of Serbia, 2012)

TY  - CONF
AU  - Ranković, D.P.
AU  - Kuzmanović, Miroslav M.
AU  - Gaković, Biljana M.
AU  - Pavlović, Mirjana S.
AU  - Stoiljković, Milovan
AU  - Savović, Jelena
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9265
AB  - In this study, the influence of nitrogen gas addition on argon plasma electron
number density was investigated. The plasma source is a wall stabilized direct
current arc burning in argon at atmospheric pressure with continual water aerosol
supply. To the argon gas carrying water aerosol a variable amounts (4, 8 and 11%)
of nitrogen was added. The addition of the molecular gas was carried out by
increasing the flow rate of the N2 and decreasing that of Ar, so that the total flow
rate of the mixed gas was constant 2.7 Lmin-1. The arc was operating in the current
intensity range 4 to 11 A. The electron number density was calculated from the
measured Stark profiles of Hβ 486.13 nm spectral line at the arc axis, for different
arc currents. The radial distribution of electron number density was obtained from
the measured radial profiles of Hβ line. The addition of the molecular gas to the
argon plasma resulted in considerable changes in electron number density.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
T1  - The electron number density of argon-nitrogen atmospheric pressure plasma
VL  - 1
SP  - 79
EP  - 81
ER  - 
@conference{
author = "Ranković, D.P. and Kuzmanović, Miroslav M. and Gaković, Biljana M. and Pavlović, Mirjana S. and Stoiljković, Milovan and Savović, Jelena",
year = "2012",
abstract = "In this study, the influence of nitrogen gas addition on argon plasma electron
number density was investigated. The plasma source is a wall stabilized direct
current arc burning in argon at atmospheric pressure with continual water aerosol
supply. To the argon gas carrying water aerosol a variable amounts (4, 8 and 11%)
of nitrogen was added. The addition of the molecular gas was carried out by
increasing the flow rate of the N2 and decreasing that of Ar, so that the total flow
rate of the mixed gas was constant 2.7 Lmin-1. The arc was operating in the current
intensity range 4 to 11 A. The electron number density was calculated from the
measured Stark profiles of Hβ 486.13 nm spectral line at the arc axis, for different
arc currents. The radial distribution of electron number density was obtained from
the measured radial profiles of Hβ line. The addition of the molecular gas to the
argon plasma resulted in considerable changes in electron number density.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry",
title = "The electron number density of argon-nitrogen atmospheric pressure plasma",
volume = "1",
pages = "79-81"
}
Ranković, D.P., Kuzmanović, M. M., Gaković, B. M., Pavlović, M. S., Stoiljković, M.,& Savović, J.. (2012). The electron number density of argon-nitrogen atmospheric pressure plasma. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., 1, 79-81.
Ranković D, Kuzmanović MM, Gaković BM, Pavlović MS, Stoiljković M, Savović J. The electron number density of argon-nitrogen atmospheric pressure plasma. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry. 2012;1:79-81..
Ranković, D.P., Kuzmanović, Miroslav M., Gaković, Biljana M., Pavlović, Mirjana S., Stoiljković, Milovan, Savović, Jelena, "The electron number density of argon-nitrogen atmospheric pressure plasma" in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry, 1 (2012):79-81.

Femtosecond laser ablation and structuring of a hard bi-layered coating

Gaković, Biljana M.; Radu, C.; Radak, Bojan; Zamfirescu, M.; Petrović, S.; Trtica, Milan; Mihailescu, I.N.

(Society of Physical Chemists of Serbia, 2012)

TY  - CONF
AU  - Gaković, Biljana M.
AU  - Radu, C.
AU  - Radak, Bojan
AU  - Zamfirescu, M.
AU  - Petrović, S.
AU  - Trtica, Milan
AU  - Mihailescu, I.N.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9308
AB  - We studied surface modification of a bi-layered coating (Al2O3/TiAlN/steel)
induced by fs laser with single and multi-pulse irradiation. The laser pulses
(λ=775 nm, τ=200 fs) were generated by a Ti:sapphire laser. The single pulse
threshold fluence for ablation of the top Al2O3 layer was Dath =0.56 Jcm-2. Single
pulse actions with fluence increased up to 16.47 Jcm-2 caused widening of ablated
area without significant change of the TiAlN layer underneath. In case of multipulse irradiation, periodical surface structures (LIPSS) were induced on the TiAlN
layer surface. The average periodicity of created LIPSS was 600 nm.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
T1  - Femtosecond laser ablation and structuring of a hard bi-layered coating
VL  - 1
SP  - 417
EP  - 419
ER  - 
@conference{
author = "Gaković, Biljana M. and Radu, C. and Radak, Bojan and Zamfirescu, M. and Petrović, S. and Trtica, Milan and Mihailescu, I.N.",
year = "2012",
abstract = "We studied surface modification of a bi-layered coating (Al2O3/TiAlN/steel)
induced by fs laser with single and multi-pulse irradiation. The laser pulses
(λ=775 nm, τ=200 fs) were generated by a Ti:sapphire laser. The single pulse
threshold fluence for ablation of the top Al2O3 layer was Dath =0.56 Jcm-2. Single
pulse actions with fluence increased up to 16.47 Jcm-2 caused widening of ablated
area without significant change of the TiAlN layer underneath. In case of multipulse irradiation, periodical surface structures (LIPSS) were induced on the TiAlN
layer surface. The average periodicity of created LIPSS was 600 nm.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry",
title = "Femtosecond laser ablation and structuring of a hard bi-layered coating",
volume = "1",
pages = "417-419"
}
Gaković, B. M., Radu, C., Radak, B., Zamfirescu, M., Petrović, S., Trtica, M.,& Mihailescu, I.N.. (2012). Femtosecond laser ablation and structuring of a hard bi-layered coating. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry
Society of Physical Chemists of Serbia., 1, 417-419.
Gaković BM, Radu C, Radak B, Zamfirescu M, Petrović S, Trtica M, Mihailescu I. Femtosecond laser ablation and structuring of a hard bi-layered coating. in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry. 2012;1:417-419..
Gaković, Biljana M., Radu, C., Radak, Bojan, Zamfirescu, M., Petrović, S., Trtica, Milan, Mihailescu, I.N., "Femtosecond laser ablation and structuring of a hard bi-layered coating" in Physical chemistry 2012 : 11th international conference on fundamental and applied aspects of physical chemistry, 1 (2012):417-419.

Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing

Petrović, Suzana; Peruško, Davor; Mitrić, Miodrag; Kovač, Janez; Dražić, Goran; Gaković, Biljana M.; Homewood, Kevin P.; Milosavljević, Momir

(2012)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Mitrić, Miodrag
AU  - Kovač, Janez
AU  - Dražić, Goran
AU  - Gaković, Biljana M.
AU  - Homewood, Kevin P.
AU  - Milosavljević, Momir
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4839
AB  - Ion implantation and thermal annealing effects on composition and structure of Ni/Ti multilayer have been studied and reported in this paper. The thin films composed of five (Ni/Ti) bilayers were deposited by d.c. ion sputtering on (100) Si wafers to a total thickness of similar to 180 nm. Ion irradiations were performed by 180 keV Ar+ ions with fluence of 6 x 10(16) ions cm(-2). After deposition and implantation, the samples were annealed at 400 degrees C for 30 min in an inert ambient. Composition and structural characterizations were performed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Annealing of as-deposited samples at 400 degrees C induces a progressed interaction between Ni and Ti layers with the initial formation of NiTi alloy phase. Progressed alloying was achieved for the ion fluence of 6 x 10(16) ions cm(-2) and the formed structure is composed of NiTi compound, only at depth around the projected ion range. In the deeper layers, beyond the projected range of implanted ions, the diffusion of Ni atoms can lead to solid state amorphization. Subsequent annealing at 400 degrees C for 30 min enabled enhanced interaction between intermixed Ni and Ti layers, and in the layers close to the Si substrate the conditions for the formation of intermetallic compound are created. (c) 2012 Elsevier Ltd. All rights reserved.
T2  - Intermetallics
T1  - Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing
VL  - 25
SP  - 27
EP  - 33
DO  - 10.1016/j.intermet.2012.02.007
ER  - 
@article{
author = "Petrović, Suzana and Peruško, Davor and Mitrić, Miodrag and Kovač, Janez and Dražić, Goran and Gaković, Biljana M. and Homewood, Kevin P. and Milosavljević, Momir",
year = "2012",
abstract = "Ion implantation and thermal annealing effects on composition and structure of Ni/Ti multilayer have been studied and reported in this paper. The thin films composed of five (Ni/Ti) bilayers were deposited by d.c. ion sputtering on (100) Si wafers to a total thickness of similar to 180 nm. Ion irradiations were performed by 180 keV Ar+ ions with fluence of 6 x 10(16) ions cm(-2). After deposition and implantation, the samples were annealed at 400 degrees C for 30 min in an inert ambient. Composition and structural characterizations were performed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Annealing of as-deposited samples at 400 degrees C induces a progressed interaction between Ni and Ti layers with the initial formation of NiTi alloy phase. Progressed alloying was achieved for the ion fluence of 6 x 10(16) ions cm(-2) and the formed structure is composed of NiTi compound, only at depth around the projected ion range. In the deeper layers, beyond the projected range of implanted ions, the diffusion of Ni atoms can lead to solid state amorphization. Subsequent annealing at 400 degrees C for 30 min enabled enhanced interaction between intermixed Ni and Ti layers, and in the layers close to the Si substrate the conditions for the formation of intermetallic compound are created. (c) 2012 Elsevier Ltd. All rights reserved.",
journal = "Intermetallics",
title = "Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing",
volume = "25",
pages = "27-33",
doi = "10.1016/j.intermet.2012.02.007"
}
Petrović, S., Peruško, D., Mitrić, M., Kovač, J., Dražić, G., Gaković, B. M., Homewood, K. P.,& Milosavljević, M.. (2012). Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing. in Intermetallics, 25, 27-33.
https://doi.org/10.1016/j.intermet.2012.02.007
Petrović S, Peruško D, Mitrić M, Kovač J, Dražić G, Gaković BM, Homewood KP, Milosavljević M. Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing. in Intermetallics. 2012;25:27-33.
doi:10.1016/j.intermet.2012.02.007 .
Petrović, Suzana, Peruško, Davor, Mitrić, Miodrag, Kovač, Janez, Dražić, Goran, Gaković, Biljana M., Homewood, Kevin P., Milosavljević, Momir, "Formation of intermetallic phase in Ni/Ti multilayer structure by ion implantation and thermal annealing" in Intermetallics, 25 (2012):27-33,
https://doi.org/10.1016/j.intermet.2012.02.007 . .
20
21
23

Laser treatment of nanocomposite Ni/Ti multilayer thin films in air

Petrović, Suzana; Peruško, Davor; Kovač, Janez; Panjan, Matjaž; Gaković, Biljana M.; Radak, Bojan; Janković-Mandić, Ljiljana; Trtica, Milan

(2012)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Kovač, Janez
AU  - Panjan, Matjaž
AU  - Gaković, Biljana M.
AU  - Radak, Bojan
AU  - Janković-Mandić, Ljiljana
AU  - Trtica, Milan
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6993
AB  - Interaction of a Nd:YAG laser, operating at 1064 nm wavelength and pulse duration of 150 ps, with Ni/Ti multilayer thin films was studied. Nanocomposite structure of five (Ni/Ti) bilayers deposited by DC ion sputtering on Si(100) wafers to a total thickness of ca. 180 nm was treated with a laser pulse energy of about 55 mJ without focusing (fluence 1 J cm(-2)), Multi-pulse laser irradiation was done at an incidence angle of 22 degrees in air. The composition and surface morphology were monitored by Auger electron spectroscopy (AES), scanning electron microscopy (SEM), and by atomic force microscopy (AFM). The main part of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the target surface. Besides surface oxidation, the results show an increase in surface roughness, formation of a regularly rippled surface topography and microcracking. Depth profile AES analysis revealed that laser annealing induced intermixing between the components of individual Ni and Ti layers with indications of possible formation of NiTi intermetallic compounds. An interesting finding is the surface segregation of Ti, although the top layer was Ni, prior to laser irradiation. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Surface and Coatings Technology
T1  - Laser treatment of nanocomposite Ni/Ti multilayer thin films in air
VL  - 211
SP  - 93
EP  - 97
DO  - 10.1016/j.surfcoat.2011.07.035
ER  - 
@article{
author = "Petrović, Suzana and Peruško, Davor and Kovač, Janez and Panjan, Matjaž and Gaković, Biljana M. and Radak, Bojan and Janković-Mandić, Ljiljana and Trtica, Milan",
year = "2012",
abstract = "Interaction of a Nd:YAG laser, operating at 1064 nm wavelength and pulse duration of 150 ps, with Ni/Ti multilayer thin films was studied. Nanocomposite structure of five (Ni/Ti) bilayers deposited by DC ion sputtering on Si(100) wafers to a total thickness of ca. 180 nm was treated with a laser pulse energy of about 55 mJ without focusing (fluence 1 J cm(-2)), Multi-pulse laser irradiation was done at an incidence angle of 22 degrees in air. The composition and surface morphology were monitored by Auger electron spectroscopy (AES), scanning electron microscopy (SEM), and by atomic force microscopy (AFM). The main part of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the target surface. Besides surface oxidation, the results show an increase in surface roughness, formation of a regularly rippled surface topography and microcracking. Depth profile AES analysis revealed that laser annealing induced intermixing between the components of individual Ni and Ti layers with indications of possible formation of NiTi intermetallic compounds. An interesting finding is the surface segregation of Ti, although the top layer was Ni, prior to laser irradiation. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Surface and Coatings Technology",
title = "Laser treatment of nanocomposite Ni/Ti multilayer thin films in air",
volume = "211",
pages = "93-97",
doi = "10.1016/j.surfcoat.2011.07.035"
}
Petrović, S., Peruško, D., Kovač, J., Panjan, M., Gaković, B. M., Radak, B., Janković-Mandić, L.,& Trtica, M.. (2012). Laser treatment of nanocomposite Ni/Ti multilayer thin films in air. in Surface and Coatings Technology, 211, 93-97.
https://doi.org/10.1016/j.surfcoat.2011.07.035
Petrović S, Peruško D, Kovač J, Panjan M, Gaković BM, Radak B, Janković-Mandić L, Trtica M. Laser treatment of nanocomposite Ni/Ti multilayer thin films in air. in Surface and Coatings Technology. 2012;211:93-97.
doi:10.1016/j.surfcoat.2011.07.035 .
Petrović, Suzana, Peruško, Davor, Kovač, Janez, Panjan, Matjaž, Gaković, Biljana M., Radak, Bojan, Janković-Mandić, Ljiljana, Trtica, Milan, "Laser treatment of nanocomposite Ni/Ti multilayer thin films in air" in Surface and Coatings Technology, 211 (2012):93-97,
https://doi.org/10.1016/j.surfcoat.2011.07.035 . .
1
3
4

Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation

Petrović, Suzana; Salatić, Branislav; Peruško, Davor; Panjan, Matjaž; Čekada, Miha; Gaković, Biljana M.; Jelenković, Branislav; Trtica, Milan

(2012)

TY  - JOUR
AU  - Petrović, Suzana
AU  - Salatić, Branislav
AU  - Peruško, Davor
AU  - Panjan, Matjaž
AU  - Čekada, Miha
AU  - Gaković, Biljana M.
AU  - Jelenković, Branislav
AU  - Trtica, Milan
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/6956
AB  - A study of the effects of laser irradiation on the morphology and structure of Al/Ti and Ni/Ti multilayers is reported in this paper. Multilayers of Al/Ti and Ni/Ti were deposited by dc ion sputtering on Si(100) substrates in a single vacuum run. Laser processing was done by a focused Er, Yb, Cr glass laser beam at a wavelength of 1540 nm, a pulse duration of 40 ns and fluence in the range 8.5-23.8 J cm(-2). Surface changes can be summarized as follows: (i) the intensive removal of surface material with crater-like characteristics, (ii) the appearance of hydrodynamic features (such as resolidified droplets) and (iii) the sporadic appearance of cracking. Changes in the (Ni/Ti)/Si system included modification of the Si substrate with the formation of polygonal-mosaic structures and the appearance of hydrodynamic features in the form of nano-globules. The rate of ablation increased with energy density, whereas the rate of ablation for the (Ni/Ti)/Si system (similar to 11 x 10(3) mu m(3) per pulse) was higher than that for the (Al/Ti)/Si system (similar to 7 x 10(3) mu m(3) per pulse).
T2  - Physica Scripta
T1  - Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation
VL  - T149
DO  - 10.1088/0031-8949/2012/T149/014082
ER  - 
@article{
author = "Petrović, Suzana and Salatić, Branislav and Peruško, Davor and Panjan, Matjaž and Čekada, Miha and Gaković, Biljana M. and Jelenković, Branislav and Trtica, Milan",
year = "2012",
abstract = "A study of the effects of laser irradiation on the morphology and structure of Al/Ti and Ni/Ti multilayers is reported in this paper. Multilayers of Al/Ti and Ni/Ti were deposited by dc ion sputtering on Si(100) substrates in a single vacuum run. Laser processing was done by a focused Er, Yb, Cr glass laser beam at a wavelength of 1540 nm, a pulse duration of 40 ns and fluence in the range 8.5-23.8 J cm(-2). Surface changes can be summarized as follows: (i) the intensive removal of surface material with crater-like characteristics, (ii) the appearance of hydrodynamic features (such as resolidified droplets) and (iii) the sporadic appearance of cracking. Changes in the (Ni/Ti)/Si system included modification of the Si substrate with the formation of polygonal-mosaic structures and the appearance of hydrodynamic features in the form of nano-globules. The rate of ablation increased with energy density, whereas the rate of ablation for the (Ni/Ti)/Si system (similar to 11 x 10(3) mu m(3) per pulse) was higher than that for the (Al/Ti)/Si system (similar to 7 x 10(3) mu m(3) per pulse).",
journal = "Physica Scripta",
title = "Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation",
volume = "T149",
doi = "10.1088/0031-8949/2012/T149/014082"
}
Petrović, S., Salatić, B., Peruško, D., Panjan, M., Čekada, M., Gaković, B. M., Jelenković, B.,& Trtica, M.. (2012). Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation. in Physica Scripta, T149.
https://doi.org/10.1088/0031-8949/2012/T149/014082
Petrović S, Salatić B, Peruško D, Panjan M, Čekada M, Gaković BM, Jelenković B, Trtica M. Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation. in Physica Scripta. 2012;T149.
doi:10.1088/0031-8949/2012/T149/014082 .
Petrović, Suzana, Salatić, Branislav, Peruško, Davor, Panjan, Matjaž, Čekada, Miha, Gaković, Biljana M., Jelenković, Branislav, Trtica, Milan, "Surface modification of Ti-based nanocomposite multilayer structures by using laser beam irradiation" in Physica Scripta, T149 (2012),
https://doi.org/10.1088/0031-8949/2012/T149/014082 . .
1
1
2

Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating

Gaković, Biljana M.; Radak, Bojan; Radu, C.; Zamfirescu, M.; Trtica, Milan; Petrović, Suzana; Stašić, Jelena M.; Panjan, Peter; Mihailescu, Ion N.

(2012)

TY  - JOUR
AU  - Gaković, Biljana M.
AU  - Radak, Bojan
AU  - Radu, C.
AU  - Zamfirescu, M.
AU  - Trtica, Milan
AU  - Petrović, Suzana
AU  - Stašić, Jelena M.
AU  - Panjan, Peter
AU  - Mihailescu, Ion N.
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4993
AB  - We studied surface modification of a double layer protective coating on steel induced by single fs laser pulse irradiation in ambient air. The outer alumina (Al2O3) layer, which protects against aggressive environments, was 1.7 mu m thick and the titanium aluminum nitride (TiAlN) layer in contact with the steel surface had a thickness of 1.9 mu m. The pulses (lambda=775 nm, tau=200 fs) were generated by a Ti:sapphire laser source. The pulse energy was varied from 0.32 mu J to 50 mu J, corresponding to an incident laser fluence of 0.11 J cm(-2) to 16.47 J cm(-2). The surface damage threshold was found to be 0.20 J cm(-2) and the alumina layer removal was initiated at 0.56 J cm(-2). This selective ablation of alumina was possible in a wide range of fluences, up to the maximum applied, without ablating the TiAlN layer beneath. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Surface and Coatings Technology
T1  - Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating
VL  - 206
IS  - 24
SP  - 5080
EP  - 5084
DO  - 10.1016/j.surfcoat.2012.06.021
ER  - 
@article{
author = "Gaković, Biljana M. and Radak, Bojan and Radu, C. and Zamfirescu, M. and Trtica, Milan and Petrović, Suzana and Stašić, Jelena M. and Panjan, Peter and Mihailescu, Ion N.",
year = "2012",
abstract = "We studied surface modification of a double layer protective coating on steel induced by single fs laser pulse irradiation in ambient air. The outer alumina (Al2O3) layer, which protects against aggressive environments, was 1.7 mu m thick and the titanium aluminum nitride (TiAlN) layer in contact with the steel surface had a thickness of 1.9 mu m. The pulses (lambda=775 nm, tau=200 fs) were generated by a Ti:sapphire laser source. The pulse energy was varied from 0.32 mu J to 50 mu J, corresponding to an incident laser fluence of 0.11 J cm(-2) to 16.47 J cm(-2). The surface damage threshold was found to be 0.20 J cm(-2) and the alumina layer removal was initiated at 0.56 J cm(-2). This selective ablation of alumina was possible in a wide range of fluences, up to the maximum applied, without ablating the TiAlN layer beneath. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Surface and Coatings Technology",
title = "Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating",
volume = "206",
number = "24",
pages = "5080-5084",
doi = "10.1016/j.surfcoat.2012.06.021"
}
Gaković, B. M., Radak, B., Radu, C., Zamfirescu, M., Trtica, M., Petrović, S., Stašić, J. M., Panjan, P.,& Mihailescu, I. N.. (2012). Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating. in Surface and Coatings Technology, 206(24), 5080-5084.
https://doi.org/10.1016/j.surfcoat.2012.06.021
Gaković BM, Radak B, Radu C, Zamfirescu M, Trtica M, Petrović S, Stašić JM, Panjan P, Mihailescu IN. Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating. in Surface and Coatings Technology. 2012;206(24):5080-5084.
doi:10.1016/j.surfcoat.2012.06.021 .
Gaković, Biljana M., Radak, Bojan, Radu, C., Zamfirescu, M., Trtica, Milan, Petrović, Suzana, Stašić, Jelena M., Panjan, Peter, Mihailescu, Ion N., "Selective single pulse femtosecond laser removal of alumina (Al2O3) from a bilayered Al2O3/TiAlN/steel coating" in Surface and Coatings Technology, 206, no. 24 (2012):5080-5084,
https://doi.org/10.1016/j.surfcoat.2012.06.021 . .
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