TY  - CONF
AU  - Pjević, Dejan J.
AU  - Peruško, Davor
AU  - Skoulas, E.
AU  - Stratakis, E.
AU  - Siketić, Z.
AU  - Bogdanović-Radović, Iva
AU  - Savić, Tatjana D.
AU  - Čomor, Mirjana
AU  - Petrović, S.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10946
AB  - Modification of single titanium and complex titanium-aluminium samples by laser processing in the femtosecond time domain is unexplored field. This work included a study of the effects caused by changes in the composition and morphology of the compact Ti thin film and multilayer Ti/5x(Al/Ti) structure. Titanium and its oxides have specific physical, chemical and mechanical properties, such as high corrosion resistance, good stability, high strength and porosity. Titanium−oxide materials in different types and forms have shown great potential as ideal and powerful photocatalysts for various significant reactions due to their chemical stability, nontoxicity, and high reactivity. Laser surface modification allows production of active surface with formation of the desired oxide, creation of nano/micro textures and change wettability of the surface. The samples were processed by focused an Yb:KGW laser beam with 1026 nm central wavelength, 170 fs pulse duration and repetition rate of 1 kHz. The laser-induced morphological and composition modifications have shown dependence on applied intensities and number of laser pulses. The formed surface nanostructures on the Ti and Ti/Al thin film surface (5x5 mm) are obtained in scanning regime. 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 pulse energies range (not over 0.01 mJ) and effective 50 pulses, the two types of LIPSS can be observed: low and high spatial frequency LIPSS (HSFL and LSFL). The low spatial frequency LIPSS (LSFL), oriented perpendicular to the laser polarization with periods slightly lower than the irradiation wavelength, was typically formed. The laser-induced surface oxidation was analysed by Elastic Recoil Detection Analysis (ERDA) in the subsurface part of the investigated samples, which indicates formation Ti-oxide and mixture of Al- and Ti-oxide in the case of multilayer structure. Photocatalytic degradation rate on the laser irradiated surface of Ti and Ti/Al thin films was compared with unmodified samples. The rate of photo-degradation was associated with changes in structure of Ti-oxide and in increasing of surface roughness with formation of periodic structure.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
T1  - Laser-induced periodic structure on Ti and Ti/Al thin films for photocatalytic application
SP  - 177
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10946
ER  - 

@conference{
author = "Pjević, Dejan J. and Peruško, Davor and Skoulas, E. and Stratakis, E. and Siketić, Z. and Bogdanović-Radović, Iva and Savić, Tatjana D. and Čomor, Mirjana and Petrović, S.",
year = "2017",
abstract = "Modification of single titanium and complex titanium-aluminium samples by laser processing in the femtosecond time domain is unexplored field. This work included a study of the effects caused by changes in the composition and morphology of the compact Ti thin film and multilayer Ti/5x(Al/Ti) structure. Titanium and its oxides have specific physical, chemical and mechanical properties, such as high corrosion resistance, good stability, high strength and porosity. Titanium−oxide materials in different types and forms have shown great potential as ideal and powerful photocatalysts for various significant reactions due to their chemical stability, nontoxicity, and high reactivity. Laser surface modification allows production of active surface with formation of the desired oxide, creation of nano/micro textures and change wettability of the surface. The samples were processed by focused an Yb:KGW laser beam with 1026 nm central wavelength, 170 fs pulse duration and repetition rate of 1 kHz. The laser-induced morphological and composition modifications have shown dependence on applied intensities and number of laser pulses. The formed surface nanostructures on the Ti and Ti/Al thin film surface (5x5 mm) are obtained in scanning regime. 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 pulse energies range (not over 0.01 mJ) and effective 50 pulses, the two types of LIPSS can be observed: low and high spatial frequency LIPSS (HSFL and LSFL). The low spatial frequency LIPSS (LSFL), oriented perpendicular to the laser polarization with periods slightly lower than the irradiation wavelength, was typically formed. The laser-induced surface oxidation was analysed by Elastic Recoil Detection Analysis (ERDA) in the subsurface part of the investigated samples, which indicates formation Ti-oxide and mixture of Al- and Ti-oxide in the case of multilayer structure. Photocatalytic degradation rate on the laser irradiated surface of Ti and Ti/Al thin films was compared with unmodified samples. The rate of photo-degradation was associated with changes in structure of Ti-oxide and in increasing of surface roughness with formation of periodic structure.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts",
title = "Laser-induced periodic structure on Ti and Ti/Al thin films for photocatalytic application",
pages = "177",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10946"
}

Pjević, D. J., Peruško, D., Skoulas, E., Stratakis, E., Siketić, Z., Bogdanović-Radović, I., Savić, T. D., Čomor, M.,& Petrović, S.. (2017). Laser-induced periodic structure on Ti and Ti/Al thin films for photocatalytic application. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
Belgrade : Institute of Physics Belgrade., 177.
https://hdl.handle.net/21.15107/rcub_vinar_10946

Pjević DJ, Peruško D, Skoulas E, Stratakis E, Siketić Z, Bogdanović-Radović I, Savić TD, Čomor M, Petrović S. Laser-induced periodic structure on Ti and Ti/Al thin films for photocatalytic application. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:177.
https://hdl.handle.net/21.15107/rcub_vinar_10946 .

Pjević, Dejan J., Peruško, Davor, Skoulas, E., Stratakis, E., Siketić, Z., Bogdanović-Radović, Iva, Savić, Tatjana D., Čomor, Mirjana, Petrović, S., "Laser-induced periodic structure on Ti and Ti/Al thin films for photocatalytic application" in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):177,
https://hdl.handle.net/21.15107/rcub_vinar_10946 .

TY  - CONF
AU  - Salatić, Branislav
AU  - Petrović, Suzana
AU  - Bogdanović-Radović, Iva
AU  - Čekada, M.
AU  - Panjan, P.
AU  - Pantelić, D.
AU  - Jelenković, B.
AU  - Peruško, Davor
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10944
AB  - Metallic thin films, based on nickel (Ni) and palladium (Pd)are promising material for a wide range of application, as catalytic components [1], optical devices [2], photovoltaic gas sensors [3], dye sensitized solar cells [4], and especially for environmental purposes [5]. The potential of nanosecond laser micro-processing for surface modification of nickel-palladium (Ni/Pd) multilayer thin film deposited on n-type (100) silicon wafer was studied. The multilayer structure composed of five bilayer (Pd/Ni) was deposited by d.c.sputtering from a pure Ni and Pd targets, using Ar ions, to a total thickness of about 180 nm. These multilayer thin films were then exposed to various number of pulses of Er:Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns. Multi-pulse laser irradiations were done at an incidence angle of 90 in an ambient air environment. The changes of the composition and surface morphology in the 5x(Pd/Ni)/Si system were monitored by Particle Induced X-Ray Emission (PIXE), by Rutherford backscattering spectrometry (RBS), by scanning electron microscopy (SEM) and by profilometry. The main part of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the multilayer surface. The results show an increase in surface roughness, formation of a specific surface topography, appearance of hydrodynamic features and ablation of surface material without shallow or deep crater like characteristics. RBS analysis revealed that laser modification was induced intermixing between the individual Ni and Pd layers, but also with silicon substrate. During the laser processing of 5x(Pd/Ni)/Si system delivered energy was probably sufficient to cause solid-state reactions, the formation of intermetallic compounds and silicides with Ni and Pd. An interesting finding is the 5x(Pd/Ni)/Si thin film has undergone some changes in the chemical composition and structure in the irradiated areas, indicating better crystallinity with an increase of the number of applied pulses.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
T1  - Laser ablation of nickel/palladium multilayer thin films by nanosecond pulses
SP  - 173
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10944
ER  - 

@conference{
author = "Salatić, Branislav and Petrović, Suzana and Bogdanović-Radović, Iva and Čekada, M. and Panjan, P. and Pantelić, D. and Jelenković, B. and Peruško, Davor",
year = "2017",
abstract = "Metallic thin films, based on nickel (Ni) and palladium (Pd)are promising material for a wide range of application, as catalytic components [1], optical devices [2], photovoltaic gas sensors [3], dye sensitized solar cells [4], and especially for environmental purposes [5]. The potential of nanosecond laser micro-processing for surface modification of nickel-palladium (Ni/Pd) multilayer thin film deposited on n-type (100) silicon wafer was studied. The multilayer structure composed of five bilayer (Pd/Ni) was deposited by d.c.sputtering from a pure Ni and Pd targets, using Ar ions, to a total thickness of about 180 nm. These multilayer thin films were then exposed to various number of pulses of Er:Glass laser, operating at 1540 nm wavelength with pulse duration of 44 ns. Multi-pulse laser irradiations were done at an incidence angle of 90 in an ambient air environment. The changes of the composition and surface morphology in the 5x(Pd/Ni)/Si system were monitored by Particle Induced X-Ray Emission (PIXE), by Rutherford backscattering spectrometry (RBS), by scanning electron microscopy (SEM) and by profilometry. The main part of the absorbed laser energy was rapidly transformed into heat, producing intensive modifications of composition and morphology on the multilayer surface. The results show an increase in surface roughness, formation of a specific surface topography, appearance of hydrodynamic features and ablation of surface material without shallow or deep crater like characteristics. RBS analysis revealed that laser modification was induced intermixing between the individual Ni and Pd layers, but also with silicon substrate. During the laser processing of 5x(Pd/Ni)/Si system delivered energy was probably sufficient to cause solid-state reactions, the formation of intermetallic compounds and silicides with Ni and Pd. An interesting finding is the 5x(Pd/Ni)/Si thin film has undergone some changes in the chemical composition and structure in the irradiated areas, indicating better crystallinity with an increase of the number of applied pulses.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts",
title = "Laser ablation of nickel/palladium multilayer thin films by nanosecond pulses",
pages = "173",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10944"
}

Salatić, B., Petrović, S., Bogdanović-Radović, I., Čekada, M., Panjan, P., Pantelić, D., Jelenković, B.,& Peruško, D.. (2017). Laser ablation of nickel/palladium multilayer thin films by nanosecond pulses. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts
Belgrade : Institute of Physics Belgrade., 173.
https://hdl.handle.net/21.15107/rcub_vinar_10944

Salatić B, Petrović S, Bogdanović-Radović I, Čekada M, Panjan P, Pantelić D, Jelenković B, Peruško D. Laser ablation of nickel/palladium multilayer thin films by nanosecond pulses. in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts. 2017;:173.
https://hdl.handle.net/21.15107/rcub_vinar_10944 .

Salatić, Branislav, Petrović, Suzana, Bogdanović-Radović, Iva, Čekada, M., Panjan, P., Pantelić, D., Jelenković, B., Peruško, Davor, "Laser ablation of nickel/palladium multilayer thin films by nanosecond pulses" in PHOTONICA2017 : 6th International School and Conference on Photonics and COST actions: MP1406 and MP1402 : Program and the book of abstracts (2017):173,
https://hdl.handle.net/21.15107/rcub_vinar_10944 .