TY  - CONF
AU  - Potočnik, Jelena
AU  - Božinović, Nevena
AU  - Popović, M.
AU  - Nenadović, Miloš
AU  - Novaković, Mirjana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11804
AB  - We have investigated the effect of thickness and deposition conditions on the structural and optical properties of nanostructured copper (Cu) thin films, deposited using e-beam glancing angle deposition. In the first series of experiments, samples were deposited in the form of helical nanostructures, to the thicknesses of 160 nm, 280 nm, 450 nm and 780 nm. The second set of the samples was fabricated in the form of zigzag and square-spiral nanostructures to a thickness of approximately 300 nm, by using different azimuthal rotations (φ = 180o, 90o, 45o, 22.5o and 11o). Field-emission scanning electron microscopy and high-resolution transmission electron microscopy were utilized to explore morphological and structural properties, while optical studies were done using spectroscopic ellipsometry. The results showed that for both series of the samples the deposited structures are porous with nanometer-sized particles. Detailed analyses of optical properties revealed that the thickness of the films had a significant impact on the dielectric function of Cu structures. With increasing the thickness from 160 nm to 780 nm the surface plasmon resonance (SPR) peak was shifted from 1.31 eV to 1.05 eV. Changes in SPR peak position were associated with the growth mechanism and the size of deposited nanostructures. For the second series of the samples, it was found that as the azimuthal rotation decreases, deposited nanostructures become more porous with larger number of grown arms. Optical analysis showed that the properties of the grown Cu films are greatly influenced by the deposition conditions. By decreasing the φ parameter, SPR peak was shifted from 1.19 eV to 0.75 eV, which can be correlated with the size distribution and agglomeration of Cu nanoparticles.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Helical and square-spiral copper nanostructures: The effect of thickness and deposition conditions on the structural and optical properties
SP  - 60
EP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11804
ER  - 

@conference{
author = "Potočnik, Jelena and Božinović, Nevena and Popović, M. and Nenadović, Miloš and Novaković, Mirjana",
year = "2023",
abstract = "We have investigated the effect of thickness and deposition conditions on the structural and optical properties of nanostructured copper (Cu) thin films, deposited using e-beam glancing angle deposition. In the first series of experiments, samples were deposited in the form of helical nanostructures, to the thicknesses of 160 nm, 280 nm, 450 nm and 780 nm. The second set of the samples was fabricated in the form of zigzag and square-spiral nanostructures to a thickness of approximately 300 nm, by using different azimuthal rotations (φ = 180o, 90o, 45o, 22.5o and 11o). Field-emission scanning electron microscopy and high-resolution transmission electron microscopy were utilized to explore morphological and structural properties, while optical studies were done using spectroscopic ellipsometry. The results showed that for both series of the samples the deposited structures are porous with nanometer-sized particles. Detailed analyses of optical properties revealed that the thickness of the films had a significant impact on the dielectric function of Cu structures. With increasing the thickness from 160 nm to 780 nm the surface plasmon resonance (SPR) peak was shifted from 1.31 eV to 1.05 eV. Changes in SPR peak position were associated with the growth mechanism and the size of deposited nanostructures. For the second series of the samples, it was found that as the azimuthal rotation decreases, deposited nanostructures become more porous with larger number of grown arms. Optical analysis showed that the properties of the grown Cu films are greatly influenced by the deposition conditions. By decreasing the φ parameter, SPR peak was shifted from 1.19 eV to 0.75 eV, which can be correlated with the size distribution and agglomeration of Cu nanoparticles.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Helical and square-spiral copper nanostructures: The effect of thickness and deposition conditions on the structural and optical properties",
pages = "60-60",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11804"
}

Potočnik, J., Božinović, N., Popović, M., Nenadović, M.,& Novaković, M.. (2023). Helical and square-spiral copper nanostructures: The effect of thickness and deposition conditions on the structural and optical properties. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 60-60.
https://hdl.handle.net/21.15107/rcub_vinar_11804

Potočnik J, Božinović N, Popović M, Nenadović M, Novaković M. Helical and square-spiral copper nanostructures: The effect of thickness and deposition conditions on the structural and optical properties. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:60-60.
https://hdl.handle.net/21.15107/rcub_vinar_11804 .

Potočnik, Jelena, Božinović, Nevena, Popović, M., Nenadović, Miloš, Novaković, Mirjana, "Helical and square-spiral copper nanostructures: The effect of thickness and deposition conditions on the structural and optical properties" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):60-60,
https://hdl.handle.net/21.15107/rcub_vinar_11804 .

TY  - CONF
AU  - Božinović, Nevena
AU  - Petrović, Suzana
AU  - Novaković, Mirjana
AU  - Rajić, Vladimir
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12323
AB  - In scientific and commericial needs, there was a great demand for the modification of biomaterials that would replace damaged tissue in the body. Today, titanium alloys are mostly used for these purposes in combination with metals of similar physicochemical properties. In this context, there is an increased interest in the development of novel biocompatible materials with enhanced surface interface. The experimental results of a Ti/Zr/Ti thin film system deposited on a substrate pre-patterned by a dynamic femtosecond laser are presented. Surface pattering with micrometre characteristics in the form of spikes is being investigated in order to generate arrayed surface patterns for biomedical pruposes. Femtosecond laser pulses were used to acquire black silicon surfaces adorned with conical structures under 0,65 bar in SF6 ambient pressure. The silicon surface contains high aspect ratio spikes with conical morphologies of about 2μm, 400 angle opening, and 13·106 cm-2 density that is roughly uniform over the treatment area. Ion sputtering was employed on sech a prepared surface to make a unique composite thin film composed of two layers of Ti and a subsurface layer of Zr. The deposited Ti/Zr/Ti cpomiste has a thickness of 400 nm. The composition and surface morphology were evaluated using FESEM-EDS and XPS methods. Transmission electron spectroscopy and energy dispersive X-ray spectroscopy demonstrated that post-deposition of Ti/Zr/Ti over Si laser-patterned resulted in diffusion of Ti and Zr layers.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
T1  - Thin film deposition of multilayers on silicon substrate laser pre-patterned
SP  - 51
EP  - 51
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12323
ER  - 

@conference{
author = "Božinović, Nevena and Petrović, Suzana and Novaković, Mirjana and Rajić, Vladimir",
year = "2023",
abstract = "In scientific and commericial needs, there was a great demand for the modification of biomaterials that would replace damaged tissue in the body. Today, titanium alloys are mostly used for these purposes in combination with metals of similar physicochemical properties. In this context, there is an increased interest in the development of novel biocompatible materials with enhanced surface interface. The experimental results of a Ti/Zr/Ti thin film system deposited on a substrate pre-patterned by a dynamic femtosecond laser are presented. Surface pattering with micrometre characteristics in the form of spikes is being investigated in order to generate arrayed surface patterns for biomedical pruposes. Femtosecond laser pulses were used to acquire black silicon surfaces adorned with conical structures under 0,65 bar in SF6 ambient pressure. The silicon surface contains high aspect ratio spikes with conical morphologies of about 2μm, 400 angle opening, and 13·106 cm-2 density that is roughly uniform over the treatment area. Ion sputtering was employed on sech a prepared surface to make a unique composite thin film composed of two layers of Ti and a subsurface layer of Zr. The deposited Ti/Zr/Ti cpomiste has a thickness of 400 nm. The composition and surface morphology were evaluated using FESEM-EDS and XPS methods. Transmission electron spectroscopy and energy dispersive X-ray spectroscopy demonstrated that post-deposition of Ti/Zr/Ti over Si laser-patterned resulted in diffusion of Ti and Zr layers.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts",
title = "Thin film deposition of multilayers on silicon substrate laser pre-patterned",
pages = "51-51",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12323"
}

Božinović, N., Petrović, S., Novaković, M.,& Rajić, V.. (2023). Thin film deposition of multilayers on silicon substrate laser pre-patterned. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts
Belgrade : Institute of Technical Sciences of SASA., 51-51.
https://hdl.handle.net/21.15107/rcub_vinar_12323

Božinović N, Petrović S, Novaković M, Rajić V. Thin film deposition of multilayers on silicon substrate laser pre-patterned. in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts. 2023;:51-51.
https://hdl.handle.net/21.15107/rcub_vinar_12323 .

Božinović, Nevena, Petrović, Suzana, Novaković, Mirjana, Rajić, Vladimir, "Thin film deposition of multilayers on silicon substrate laser pre-patterned" in 21st Young Researchers' Conference Materials Sciences and Engineering : program and the book of abstracts (2023):51-51,
https://hdl.handle.net/21.15107/rcub_vinar_12323 .

TY  - JOUR
AU  - Božinović, Nevena
AU  - Savva, Kyriaki
AU  - Rajić, Vladimir
AU  - Popović, Maja
AU  - Tošić, Dragana
AU  - Janjetović, Kristina
AU  - Despotović, Ana
AU  - Zogović, Nevena
AU  - Stratakis, Emmanuel
AU  - Petrović, Suzana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11547
AB  - The creation of novel biocompatible Ti-based thin films with a Zr or Cu sub-layer modified by ultrafast laser processing is studied. To prepare bioactive surfaces, ultrafast laser processing is focused on the formation of laser-induced periodic surface structures (LIPSS) with the production of oxide phases at the surfaces. Two differently designed multilayer thin films Ti/Cu/Ti and Ti/Zr/Ti were deposited on the silicon using the ion sputtering method. The Ti thin film contains Cu or Zr sub-layer (thickness of 10 nm) at the 10 nm below the surface. The composition and surface morphology variations for these systems, deposited and laser-processed under the same experimental conditions, were caused only by different thermo-physical properties of the sub-layer (Cu or Zr). The surface morphology in the form of LIPSS, led to improved cell adhesion and stable cells/thin films interface compared to as-deposited samples. Field-emission scanning electron microscopy and MTT analysis revealed that laser processing of both systems increased cell adhesion, proliferation, and metabolical activity of L929 mouse fibroblast cells compared to non-modified flat surfaces. Overall, the biocompatibility of Zrcontaining thin films is better than Ti/Cu/Ti system. Further, laser processing and formation of LIPSS makes Ti/Zr/Ti thin films excellent candidate for biomedical
T2  - Materials Chemistry and Physics
T1  - Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films
VL  - 308
SP  - 128286
DO  - 10.1016/j.matchemphys.2023.128286
ER  - 

@article{
author = "Božinović, Nevena and Savva, Kyriaki and Rajić, Vladimir and Popović, Maja and Tošić, Dragana and Janjetović, Kristina and Despotović, Ana and Zogović, Nevena and Stratakis, Emmanuel and Petrović, Suzana",
year = "2023",
abstract = "The creation of novel biocompatible Ti-based thin films with a Zr or Cu sub-layer modified by ultrafast laser processing is studied. To prepare bioactive surfaces, ultrafast laser processing is focused on the formation of laser-induced periodic surface structures (LIPSS) with the production of oxide phases at the surfaces. Two differently designed multilayer thin films Ti/Cu/Ti and Ti/Zr/Ti were deposited on the silicon using the ion sputtering method. The Ti thin film contains Cu or Zr sub-layer (thickness of 10 nm) at the 10 nm below the surface. The composition and surface morphology variations for these systems, deposited and laser-processed under the same experimental conditions, were caused only by different thermo-physical properties of the sub-layer (Cu or Zr). The surface morphology in the form of LIPSS, led to improved cell adhesion and stable cells/thin films interface compared to as-deposited samples. Field-emission scanning electron microscopy and MTT analysis revealed that laser processing of both systems increased cell adhesion, proliferation, and metabolical activity of L929 mouse fibroblast cells compared to non-modified flat surfaces. Overall, the biocompatibility of Zrcontaining thin films is better than Ti/Cu/Ti system. Further, laser processing and formation of LIPSS makes Ti/Zr/Ti thin films excellent candidate for biomedical",
journal = "Materials Chemistry and Physics",
title = "Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films",
volume = "308",
pages = "128286",
doi = "10.1016/j.matchemphys.2023.128286"
}

Božinović, N., Savva, K., Rajić, V., Popović, M., Tošić, D., Janjetović, K., Despotović, A., Zogović, N., Stratakis, E.,& Petrović, S.. (2023). Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films. in Materials Chemistry and Physics, 308, 128286.
https://doi.org/10.1016/j.matchemphys.2023.128286

Božinović N, Savva K, Rajić V, Popović M, Tošić D, Janjetović K, Despotović A, Zogović N, Stratakis E, Petrović S. Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films. in Materials Chemistry and Physics. 2023;308:128286.
doi:10.1016/j.matchemphys.2023.128286 .

Božinović, Nevena, Savva, Kyriaki, Rajić, Vladimir, Popović, Maja, Tošić, Dragana, Janjetović, Kristina, Despotović, Ana, Zogović, Nevena, Stratakis, Emmanuel, Petrović, Suzana, "Influence of zirconium and copper sub-layer in cell integrations on femtosecond laser-processed Ti thin films" in Materials Chemistry and Physics, 308 (2023):128286,
https://doi.org/10.1016/j.matchemphys.2023.128286 . .

TY  - JOUR
AU  - Petrović, Suzana
AU  - Božinović, Nevena
AU  - Rajić, Vladimir
AU  - Stanisavljević Ninković, Danijela
AU  - Kisić, Danilo
AU  - Stevanović, Milena J.
AU  - Stratakis, Emmanuel
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11368
AB  - Arranged patterns obtained via ultrafast laser processing on the surface of Ti/Cu/Ti/Si and Ti/Zr/Ti/Si thin-film systems are reported. Two differently designed multilayer thin films Ti/Cu/Ti/Si and Ti/Zr/Ti/Si were deposited on silicon using the ion sputtering method. The bioactive surfaces of these systems involve the formation of laser-induced periodic surface structures (LIPSS) in each of the laser-written lines of mesh patterns on 5 × 5 mm areas. The formation of nano- and micro-patterns with an ultra-thin oxide film on the surfaces was used to observe the effects of morphology and proliferation of the MRC-5 cell culture line. To determine whether Ti-based thin films have a toxic effect on living cells, an MTT assay was performed. The relative cytotoxic effect, as a percentage of surviving cells, showed that there was no difference in cell number between the Ti-based thin films and the control cells. There was also no difference in the viability of the MRC-5 cells, except for the Ti/Cu/Ti/Si system, where there was a slight 10% decrease in cell viability. © 2023 by the authors.
T2  - Coatings
T1  - Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems
VL  - 13
IS  - 6
SP  - 1107
DO  - 10.3390/coatings13061107
ER  - 

@article{
author = "Petrović, Suzana and Božinović, Nevena and Rajić, Vladimir and Stanisavljević Ninković, Danijela and Kisić, Danilo and Stevanović, Milena J. and Stratakis, Emmanuel",
year = "2023",
abstract = "Arranged patterns obtained via ultrafast laser processing on the surface of Ti/Cu/Ti/Si and Ti/Zr/Ti/Si thin-film systems are reported. Two differently designed multilayer thin films Ti/Cu/Ti/Si and Ti/Zr/Ti/Si were deposited on silicon using the ion sputtering method. The bioactive surfaces of these systems involve the formation of laser-induced periodic surface structures (LIPSS) in each of the laser-written lines of mesh patterns on 5 × 5 mm areas. The formation of nano- and micro-patterns with an ultra-thin oxide film on the surfaces was used to observe the effects of morphology and proliferation of the MRC-5 cell culture line. To determine whether Ti-based thin films have a toxic effect on living cells, an MTT assay was performed. The relative cytotoxic effect, as a percentage of surviving cells, showed that there was no difference in cell number between the Ti-based thin films and the control cells. There was also no difference in the viability of the MRC-5 cells, except for the Ti/Cu/Ti/Si system, where there was a slight 10% decrease in cell viability. © 2023 by the authors.",
journal = "Coatings",
title = "Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems",
volume = "13",
number = "6",
pages = "1107",
doi = "10.3390/coatings13061107"
}

Petrović, S., Božinović, N., Rajić, V., Stanisavljević Ninković, D., Kisić, D., Stevanović, M. J.,& Stratakis, E.. (2023). Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems. in Coatings, 13(6), 1107.
https://doi.org/10.3390/coatings13061107

Petrović S, Božinović N, Rajić V, Stanisavljević Ninković D, Kisić D, Stevanović MJ, Stratakis E. Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems. in Coatings. 2023;13(6):1107.
doi:10.3390/coatings13061107 .

Petrović, Suzana, Božinović, Nevena, Rajić, Vladimir, Stanisavljević Ninković, Danijela, Kisić, Danilo, Stevanović, Milena J., Stratakis, Emmanuel, "Cell Response on Laser-Patterned Ti/Zr/Ti and Ti/Cu/Ti Multilayer Systems" in Coatings, 13, no. 6 (2023):1107,
https://doi.org/10.3390/coatings13061107 . .

TY  - CONF
AU  - Božinović, Nevena
AU  - Rajić, Vladimir
AU  - Savva, K.
AU  - Potočnik, Jelena
AU  - Stratakis, E.
AU  - Petrović, S.
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11816
AB  - The experimental study of the dynamic femtosecond laser substrate pre-patterning of the Ti/Zr/Ti thin film system is reported. The design of surface pattering with the micrometer features in the form of spikes is investigated in order to improve the arrayed surface structures for biomedical applications. Femtosecond laser pulses were used to acquire black silicon surfaces decorated with conical structures (spikes) on crystalline silicon surfaces under 6.5×102 mbar of SF6 environmental atmosphere. After irradiation, the silicon surface exhibits high aspect ratio spikes, which have conical shapes of about 2 μm height, 40° angle opening, 13×106 cm−2 density that remains approximately uniform across the processed area. Results show that the base of the induced conical structures has an elliptical shape with a major (long) and minor (short) axis on the horizontal plane. It is revealed that the orientation of the long axis of the ellipsis is polarization-dependent with the long axis oriented always perpendicularly to the electric field of the laser beam. Spike formation has been attributed to a complex mechanism initiated by partial material melting and subsequent capillary wave formation driven by surface tension gradients within the molten region. Ion sputtering was used to create unique composite thin films on pre-patterned Si substrates that consist of two layers of Ti and subsurface layer of Zr on the interface of titanium. The total thickness of the deposited composite in Ti/Zr/Ti form was 300 nm. The composition, surface morphology and wetting properties were analyzed by scanning electron microscopy (SEM-EDS), profilometry and wettability measurements. The formation of micro-patterns with spikes array of composite Ti/Zr/Ti thin film systems was used to observe the effects of morphology on survival, adhesion and proliferation of the MRC-5 cell culture line. To determine whether Ti/Zr/Ti thin films have a toxic effect on living cells, an MTT assay was performed. The relative cytotoxic effect as a percentage of surviving cells showed that there was no difference in cell number between the Ti/Zr/Ti thin films and the control cells. There was also no difference in the viability of the MRC-5 cells.
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
T1  - Preparing the bioactive surface of Ti/Zr/Ti system by femtosecond laser pre-patterning of substrate
SP  - 117
EP  - 117
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11816
ER  - 

@conference{
author = "Božinović, Nevena and Rajić, Vladimir and Savva, K. and Potočnik, Jelena and Stratakis, E. and Petrović, S.",
year = "2023",
abstract = "The experimental study of the dynamic femtosecond laser substrate pre-patterning of the Ti/Zr/Ti thin film system is reported. The design of surface pattering with the micrometer features in the form of spikes is investigated in order to improve the arrayed surface structures for biomedical applications. Femtosecond laser pulses were used to acquire black silicon surfaces decorated with conical structures (spikes) on crystalline silicon surfaces under 6.5×102 mbar of SF6 environmental atmosphere. After irradiation, the silicon surface exhibits high aspect ratio spikes, which have conical shapes of about 2 μm height, 40° angle opening, 13×106 cm−2 density that remains approximately uniform across the processed area. Results show that the base of the induced conical structures has an elliptical shape with a major (long) and minor (short) axis on the horizontal plane. It is revealed that the orientation of the long axis of the ellipsis is polarization-dependent with the long axis oriented always perpendicularly to the electric field of the laser beam. Spike formation has been attributed to a complex mechanism initiated by partial material melting and subsequent capillary wave formation driven by surface tension gradients within the molten region. Ion sputtering was used to create unique composite thin films on pre-patterned Si substrates that consist of two layers of Ti and subsurface layer of Zr on the interface of titanium. The total thickness of the deposited composite in Ti/Zr/Ti form was 300 nm. The composition, surface morphology and wetting properties were analyzed by scanning electron microscopy (SEM-EDS), profilometry and wettability measurements. The formation of micro-patterns with spikes array of composite Ti/Zr/Ti thin film systems was used to observe the effects of morphology on survival, adhesion and proliferation of the MRC-5 cell culture line. To determine whether Ti/Zr/Ti thin films have a toxic effect on living cells, an MTT assay was performed. The relative cytotoxic effect as a percentage of surviving cells showed that there was no difference in cell number between the Ti/Zr/Ti thin films and the control cells. There was also no difference in the viability of the MRC-5 cells.",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade",
title = "Preparing the bioactive surface of Ti/Zr/Ti system by femtosecond laser pre-patterning of substrate",
pages = "117-117",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11816"
}

Božinović, N., Rajić, V., Savva, K., Potočnik, J., Stratakis, E.,& Petrović, S.. (2023). Preparing the bioactive surface of Ti/Zr/Ti system by femtosecond laser pre-patterning of substrate. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 117-117.
https://hdl.handle.net/21.15107/rcub_vinar_11816

Božinović N, Rajić V, Savva K, Potočnik J, Stratakis E, Petrović S. Preparing the bioactive surface of Ti/Zr/Ti system by femtosecond laser pre-patterning of substrate. in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade. 2023;:117-117.
https://hdl.handle.net/21.15107/rcub_vinar_11816 .

Božinović, Nevena, Rajić, Vladimir, Savva, K., Potočnik, Jelena, Stratakis, E., Petrović, S., "Preparing the bioactive surface of Ti/Zr/Ti system by femtosecond laser pre-patterning of substrate" in PHOTONICA2023 : 9th International School and Conference on Photonics : book of abstracts; August 28 - September 1, 2023; Belgrade (2023):117-117,
https://hdl.handle.net/21.15107/rcub_vinar_11816 .

TY  - JOUR
AU  - Potočnik, Jelena
AU  - Božinović, Nevena
AU  - Novaković, Mirjana M.
AU  - Barudžija, Tanja
AU  - Nenadović, Miloš
AU  - Popović, Maja
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10299
AB  - In this study, we have investigated the effect of thickness on the structural and optical properties of copper (Cu) helical nanostructures. Thin films with thicknesses of 160 nm, 280 nm, 450 nm, and 780 nm were obtained by e-beam glancing angle deposition. The morphology and the microstructure were studied by field emission scanning electron microscopy, x-ray diffraction and transmission electron microscopy, while for the optical analysis measurements spectroscopic ellipsometry was used. The results show that the deposited structures are porous with nanometer-sized crystallites preferentially oriented along (111) planes, as well as that the diameter of the helices increases with thickness. Detailed analyses of optical properties have demonstrated that the dielectric function of Cu structures is greatly influenced by the films thicknesses. With increasing thickness from 160 nm to 780 nm, the surface plasmon resonance peak was shifted from 1.31 eV to 1.05 eV, which was correlated with the growth mechanism and the size of deposited nanostructures.
T2  - Nanotechnology
T1  - Optical properties of copper helical nanostructures: the effect of thickness on the SPR peak position
VL  - 33
IS  - 34
SP  - 345710
DO  - 10.1088/1361-6528/ac705c
ER  - 

@article{
author = "Potočnik, Jelena and Božinović, Nevena and Novaković, Mirjana M. and Barudžija, Tanja and Nenadović, Miloš and Popović, Maja",
year = "2022",
abstract = "In this study, we have investigated the effect of thickness on the structural and optical properties of copper (Cu) helical nanostructures. Thin films with thicknesses of 160 nm, 280 nm, 450 nm, and 780 nm were obtained by e-beam glancing angle deposition. The morphology and the microstructure were studied by field emission scanning electron microscopy, x-ray diffraction and transmission electron microscopy, while for the optical analysis measurements spectroscopic ellipsometry was used. The results show that the deposited structures are porous with nanometer-sized crystallites preferentially oriented along (111) planes, as well as that the diameter of the helices increases with thickness. Detailed analyses of optical properties have demonstrated that the dielectric function of Cu structures is greatly influenced by the films thicknesses. With increasing thickness from 160 nm to 780 nm, the surface plasmon resonance peak was shifted from 1.31 eV to 1.05 eV, which was correlated with the growth mechanism and the size of deposited nanostructures.",
journal = "Nanotechnology",
title = "Optical properties of copper helical nanostructures: the effect of thickness on the SPR peak position",
volume = "33",
number = "34",
pages = "345710",
doi = "10.1088/1361-6528/ac705c"
}

Potočnik, J., Božinović, N., Novaković, M. M., Barudžija, T., Nenadović, M.,& Popović, M.. (2022). Optical properties of copper helical nanostructures: the effect of thickness on the SPR peak position. in Nanotechnology, 33(34), 345710.
https://doi.org/10.1088/1361-6528/ac705c

Potočnik J, Božinović N, Novaković MM, Barudžija T, Nenadović M, Popović M. Optical properties of copper helical nanostructures: the effect of thickness on the SPR peak position. in Nanotechnology. 2022;33(34):345710.
doi:10.1088/1361-6528/ac705c .

Potočnik, Jelena, Božinović, Nevena, Novaković, Mirjana M., Barudžija, Tanja, Nenadović, Miloš, Popović, Maja, "Optical properties of copper helical nanostructures: the effect of thickness on the SPR peak position" in Nanotechnology, 33, no. 34 (2022):345710,
https://doi.org/10.1088/1361-6528/ac705c . .

TY  - JOUR
AU  - Potočnik, Jelena
AU  - Božinović, Nevena
AU  - Popović, Maja
AU  - Barudžija, Tanja
AU  - Nenadović, Miloš
AU  - Novaković, Mirjana M.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10366
AB  - Copper (Cu) thin films were deposited by using glancing angle deposition in the form of zigzag and square spiral nanostructures. Thin films were fabricated under different azimuthal rotations (φ = 180°, 90°, 45°, 22.5° and 11°), to the thickness of approximately 300 nm. Morphological, chemical and structural properties were investigated by field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. For the optical characterization of the samples spectroscopic ellipsometry was used, while the electrical properties were analyzed by four-point probe method. It was found that as the azimuthal rotation decreases, deposited nanostructures become more porous with larger number of grown arms. Both, optical and electrical analyses revealed that the properties of the obtained thin films are significantly influenced by growth mechanism. By decreasing the φ parameter, the surface plasmon resonance peak was shifted from 1038.9 nm to 1676.6 nm, which can be correlated with the porosity of Cu structures. Besides, it was found that the optical and electrical properties of the thin films are also strongly dependent on the concentration of defects.
T2  - Journal of Alloys and Compounds
T1  - Fabrication of zigzag and square spiral Cu nanostructures: Influence of substrate rotation on the structural, optical and electrical properties
VL  - 922
SP  - 166211
DO  - 10.1016/j.jallcom.2022.166211
ER  - 

@article{
author = "Potočnik, Jelena and Božinović, Nevena and Popović, Maja and Barudžija, Tanja and Nenadović, Miloš and Novaković, Mirjana M.",
year = "2022",
abstract = "Copper (Cu) thin films were deposited by using glancing angle deposition in the form of zigzag and square spiral nanostructures. Thin films were fabricated under different azimuthal rotations (φ = 180°, 90°, 45°, 22.5° and 11°), to the thickness of approximately 300 nm. Morphological, chemical and structural properties were investigated by field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy. For the optical characterization of the samples spectroscopic ellipsometry was used, while the electrical properties were analyzed by four-point probe method. It was found that as the azimuthal rotation decreases, deposited nanostructures become more porous with larger number of grown arms. Both, optical and electrical analyses revealed that the properties of the obtained thin films are significantly influenced by growth mechanism. By decreasing the φ parameter, the surface plasmon resonance peak was shifted from 1038.9 nm to 1676.6 nm, which can be correlated with the porosity of Cu structures. Besides, it was found that the optical and electrical properties of the thin films are also strongly dependent on the concentration of defects.",
journal = "Journal of Alloys and Compounds",
title = "Fabrication of zigzag and square spiral Cu nanostructures: Influence of substrate rotation on the structural, optical and electrical properties",
volume = "922",
pages = "166211",
doi = "10.1016/j.jallcom.2022.166211"
}

Potočnik, J., Božinović, N., Popović, M., Barudžija, T., Nenadović, M.,& Novaković, M. M.. (2022). Fabrication of zigzag and square spiral Cu nanostructures: Influence of substrate rotation on the structural, optical and electrical properties. in Journal of Alloys and Compounds, 922, 166211.
https://doi.org/10.1016/j.jallcom.2022.166211

Potočnik J, Božinović N, Popović M, Barudžija T, Nenadović M, Novaković MM. Fabrication of zigzag and square spiral Cu nanostructures: Influence of substrate rotation on the structural, optical and electrical properties. in Journal of Alloys and Compounds. 2022;922:166211.
doi:10.1016/j.jallcom.2022.166211 .

Potočnik, Jelena, Božinović, Nevena, Popović, Maja, Barudžija, Tanja, Nenadović, Miloš, Novaković, Mirjana M., "Fabrication of zigzag and square spiral Cu nanostructures: Influence of substrate rotation on the structural, optical and electrical properties" in Journal of Alloys and Compounds, 922 (2022):166211,
https://doi.org/10.1016/j.jallcom.2022.166211 . .

TY  - JOUR
AU  - Božinović, Nevena
AU  - Rajić, Vladimir
AU  - Kisić, Danilo
AU  - Milovanović, Dubravka S.
AU  - Savović, Jelena
AU  - Petrović, Suzana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10371
AB  - In this study, the design of surface pattering with the co-existence of micrometer and nanometer features was carried out to improve the arrayed surface structures on Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayer thin films by picosecond laser processing. The novel composite structure consisted of two layers of Ti and subsurface distributed Cu and Zr layers (thickness of 10 nm) were deposited by ion sputtering on Si substrate to the total thickness of 300 nm. The changes in the composition, surface morphology, and wetting properties after laser modification was monitored by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM–EDS), optical profilometry, and wettability measurements. It was found that laser irradiation can induce the melting of material with the formation of wrinkled periodic structures at the edges of the laser spots in both systems as a consequence of the hydrodynamic effects. Another interesting result was that the periodic structure in form of LSFL (low spatial frequency LIPSS) ripples was numerous but slightly pronounced in Ti/Cu/Zr/Ti, due to the presence of the Zr component as an ultra-thin subsurface layer, which most likely favored creating LIPSS. Such laser texturing has been used in the biomedical field as a method of developing surface topography, coated with oxides to potentially improve cell response via suitable surface wetting for a biological system.
T2  - Optical and Quantum Electronics
T1  - Laser surface texturing of Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayers thin films
VL  - 54
IS  - 9
SP  - 561
DO  - 10.1007/s11082-022-03910-6
ER  - 

@article{
author = "Božinović, Nevena and Rajić, Vladimir and Kisić, Danilo and Milovanović, Dubravka S. and Savović, Jelena and Petrović, Suzana",
year = "2022",
abstract = "In this study, the design of surface pattering with the co-existence of micrometer and nanometer features was carried out to improve the arrayed surface structures on Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayer thin films by picosecond laser processing. The novel composite structure consisted of two layers of Ti and subsurface distributed Cu and Zr layers (thickness of 10 nm) were deposited by ion sputtering on Si substrate to the total thickness of 300 nm. The changes in the composition, surface morphology, and wetting properties after laser modification was monitored by Scanning Electron Microscopy with Energy Dispersive Spectroscopy (SEM–EDS), optical profilometry, and wettability measurements. It was found that laser irradiation can induce the melting of material with the formation of wrinkled periodic structures at the edges of the laser spots in both systems as a consequence of the hydrodynamic effects. Another interesting result was that the periodic structure in form of LSFL (low spatial frequency LIPSS) ripples was numerous but slightly pronounced in Ti/Cu/Zr/Ti, due to the presence of the Zr component as an ultra-thin subsurface layer, which most likely favored creating LIPSS. Such laser texturing has been used in the biomedical field as a method of developing surface topography, coated with oxides to potentially improve cell response via suitable surface wetting for a biological system.",
journal = "Optical and Quantum Electronics",
title = "Laser surface texturing of Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayers thin films",
volume = "54",
number = "9",
pages = "561",
doi = "10.1007/s11082-022-03910-6"
}

Božinović, N., Rajić, V., Kisić, D., Milovanović, D. S., Savović, J.,& Petrović, S.. (2022). Laser surface texturing of Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayers thin films. in Optical and Quantum Electronics, 54(9), 561.
https://doi.org/10.1007/s11082-022-03910-6

Božinović N, Rajić V, Kisić D, Milovanović DS, Savović J, Petrović S. Laser surface texturing of Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayers thin films. in Optical and Quantum Electronics. 2022;54(9):561.
doi:10.1007/s11082-022-03910-6 .

Božinović, Nevena, Rajić, Vladimir, Kisić, Danilo, Milovanović, Dubravka S., Savović, Jelena, Petrović, Suzana, "Laser surface texturing of Ti/Cu/Ti and Ti/Cu/Zr/Ti multilayers thin films" in Optical and Quantum Electronics, 54, no. 9 (2022):561,
https://doi.org/10.1007/s11082-022-03910-6 . .

TY  - CONF
AU  - Božinović, Nevena
AU  - Milovanović, Dubravka S.
AU  - Rajić, Vladimir
AU  - Rakočević, Lazar
AU  - Savović, Jelena
AU  - Petrović, Suzana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10913
AB  - Design of surface patterning with the co-existence of micro- and nanoscale features by picosecond laser processing is investigated in order to improve cell integration. New biomedical Ti alloys with a high concentration of β-stabilizer elements (zirconium) are developed, as potential solutions to the mismatch between the Young’s modulus of the implant and the surrounding hard tissues. On the other hand, in order to enhance the tribological and antimicrobial properties of Ti/Zr coating, a novel titanium-copper and titanium-copper-zirconium thin film systems were designed in this work. Novel composite structure composed of subsurface distributed Cu and Zr layers (thickness of 10 nm), with satisfying mechanical properties and moderate biocompatibility, were deposited by ion sputtering on Si substrate to the total thickness of 300 nm. The multilayer thin films were irradiated by focused linearly p-polarised picosecond pulses with follow characteristics: repetition rate of 10 Hz, pulse duration equal to 150 ps, central wavelength of 1064 nm and 120 µm Gaussian spot diameter. The changes of the composition and surface morphology in the Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films were monitored by X-ray photoelectron spectroscopy (XPS), 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 [1,2]. The results show an increase in surface roughness, formation of a specific surface topography, appearance of hydrodynamic features and ablation of surface material. XPS analysis revealed that laser modification was induced intermixing between the Cu and Zr layers, but also with dominant Ti component. During the laser processing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films, delivered energy was sufficient to cause solid-state reactions, the formation of alloy between components. Laser processing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films is used to create the arrayed surface structure, such as laser-induced periodic surface structures (LIPSS) and at the same time to induce mixing of components inside the thin film structures, as well as the formation of ultrathin oxide layer at the laser-treated surfaces [3,4]. Laser surface patterns are organized as networks and parallel lines, where lines formed of LIPSS are wide up to 100 μm and distance between lines are less than 300 μm. The average periodicity between LIPSSs was about 900 nm, which would correspond to the formation of low spatial frequency LIPSS (LSFL).
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
T1  - Laser surface texturing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films
SP  - 153
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10913
ER  - 

@conference{
author = "Božinović, Nevena and Milovanović, Dubravka S. and Rajić, Vladimir and Rakočević, Lazar and Savović, Jelena and Petrović, Suzana",
year = "2021",
abstract = "Design of surface patterning with the co-existence of micro- and nanoscale features by picosecond laser processing is investigated in order to improve cell integration. New biomedical Ti alloys with a high concentration of β-stabilizer elements (zirconium) are developed, as potential solutions to the mismatch between the Young’s modulus of the implant and the surrounding hard tissues. On the other hand, in order to enhance the tribological and antimicrobial properties of Ti/Zr coating, a novel titanium-copper and titanium-copper-zirconium thin film systems were designed in this work. Novel composite structure composed of subsurface distributed Cu and Zr layers (thickness of 10 nm), with satisfying mechanical properties and moderate biocompatibility, were deposited by ion sputtering on Si substrate to the total thickness of 300 nm. The multilayer thin films were irradiated by focused linearly p-polarised picosecond pulses with follow characteristics: repetition rate of 10 Hz, pulse duration equal to 150 ps, central wavelength of 1064 nm and 120 µm Gaussian spot diameter. The changes of the composition and surface morphology in the Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films were monitored by X-ray photoelectron spectroscopy (XPS), 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 [1,2]. The results show an increase in surface roughness, formation of a specific surface topography, appearance of hydrodynamic features and ablation of surface material. XPS analysis revealed that laser modification was induced intermixing between the Cu and Zr layers, but also with dominant Ti component. During the laser processing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films, delivered energy was sufficient to cause solid-state reactions, the formation of alloy between components. Laser processing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films is used to create the arrayed surface structure, such as laser-induced periodic surface structures (LIPSS) and at the same time to induce mixing of components inside the thin film structures, as well as the formation of ultrathin oxide layer at the laser-treated surfaces [3,4]. Laser surface patterns are organized as networks and parallel lines, where lines formed of LIPSS are wide up to 100 μm and distance between lines are less than 300 μm. The average periodicity between LIPSSs was about 900 nm, which would correspond to the formation of low spatial frequency LIPSS (LSFL).",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade",
title = "Laser surface texturing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films",
pages = "153",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10913"
}

Božinović, N., Milovanović, D. S., Rajić, V., Rakočević, L., Savović, J.,& Petrović, S.. (2021). Laser surface texturing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
Belgrade : Institute of Physics Belgrade., 153.
https://hdl.handle.net/21.15107/rcub_vinar_10913

Božinović N, Milovanović DS, Rajić V, Rakočević L, Savović J, Petrović S. Laser surface texturing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade. 2021;:153.
https://hdl.handle.net/21.15107/rcub_vinar_10913 .

Božinović, Nevena, Milovanović, Dubravka S., Rajić, Vladimir, Rakočević, Lazar, Savović, Jelena, Petrović, Suzana, "Laser surface texturing of Ti/Cu/Ti/Si and Ti/Cu/Zr/Ti/Si multilayer thin films" in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade (2021):153,
https://hdl.handle.net/21.15107/rcub_vinar_10913 .

TY  - CONF
AU  - Petrović, Suzana
AU  - Peruško, Davor
AU  - Mimidis, A.
AU  - Kavatzikidou, P.
AU  - Manousaki, A.
AU  - Božinović, Nevena
AU  - Rajić, Vladimir
AU  - Stratakis, E.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10914
AB  - The experimental study of the static and dynamic femtosecond laser ablation of the multilayer 15x(Ti/Cr)/Si system is reported. The layer-by-layer selective laser ablation mechanism was studied by analysis of the surface morphology and elemental composition in static single pulse irradiation in a range of pulse energy from 10 – 17 μJ. The selective ablations as number of concentric circles in modified spots are increased with the pulse energy. The boundary between the circles was shown a change in the depth, comparable to the thickness of the individual layers. Changes in the elemental composition at the edges are associated with the removal of the layer by layer. Due to the intermixing of components and higher content of oxygen in the central area of ablated spots, it is expected that an ultra-thin layer composed of Ti and Cr oxide phases is formed at the bottom of the ablated center. The dynamic multi-pulse irradiation was observed via the production of lines with laser-induced periodic surface structures (LIPSS) at different laser parameters (scan velocities and laser polarization). The spatial periodicity of the formed LIPSS depends on changes in the effective number of pulses and laser polarization, as well as the nature of the material. The formation of LIPSS is followed with the significant ablation of multilayer 15x(Ti/Cr)/Si system, without visible hydrodynamic features, but ripples are somewhere covered with nanoparticles dimension up to 100 nm. The main focus of this experimental study was examined a novel Ti/Cr nanolayered composite in order to create a biomimetic surface with suitable composition and structure for cell integration. Using SEM and confocal microscopy images of the laser modified surfaces with seeded cell culture (NIH 3T3 fibroblasts) was found that cell adhesion and their growth depend on the surface composition and morphological forms. These results indicated a good adhesion and proliferation of cells after two and four days, with some tendency of grouping of cells on the laser modified surfaces.
PB  - Belgrade : Institute of Physics Belgrade
C3  - PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
T1  - The surface array structures induced by femtosecond laser modifications of Ti/Cr multilayer thin films for biomedical applications
SP  - 156
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10914
ER  - 

@conference{
author = "Petrović, Suzana and Peruško, Davor and Mimidis, A. and Kavatzikidou, P. and Manousaki, A. and Božinović, Nevena and Rajić, Vladimir and Stratakis, E.",
year = "2021",
abstract = "The experimental study of the static and dynamic femtosecond laser ablation of the multilayer 15x(Ti/Cr)/Si system is reported. The layer-by-layer selective laser ablation mechanism was studied by analysis of the surface morphology and elemental composition in static single pulse irradiation in a range of pulse energy from 10 – 17 μJ. The selective ablations as number of concentric circles in modified spots are increased with the pulse energy. The boundary between the circles was shown a change in the depth, comparable to the thickness of the individual layers. Changes in the elemental composition at the edges are associated with the removal of the layer by layer. Due to the intermixing of components and higher content of oxygen in the central area of ablated spots, it is expected that an ultra-thin layer composed of Ti and Cr oxide phases is formed at the bottom of the ablated center. The dynamic multi-pulse irradiation was observed via the production of lines with laser-induced periodic surface structures (LIPSS) at different laser parameters (scan velocities and laser polarization). The spatial periodicity of the formed LIPSS depends on changes in the effective number of pulses and laser polarization, as well as the nature of the material. The formation of LIPSS is followed with the significant ablation of multilayer 15x(Ti/Cr)/Si system, without visible hydrodynamic features, but ripples are somewhere covered with nanoparticles dimension up to 100 nm. The main focus of this experimental study was examined a novel Ti/Cr nanolayered composite in order to create a biomimetic surface with suitable composition and structure for cell integration. Using SEM and confocal microscopy images of the laser modified surfaces with seeded cell culture (NIH 3T3 fibroblasts) was found that cell adhesion and their growth depend on the surface composition and morphological forms. These results indicated a good adhesion and proliferation of cells after two and four days, with some tendency of grouping of cells on the laser modified surfaces.",
publisher = "Belgrade : Institute of Physics Belgrade",
journal = "PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade",
title = "The surface array structures induced by femtosecond laser modifications of Ti/Cr multilayer thin films for biomedical applications",
pages = "156",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10914"
}

Petrović, S., Peruško, D., Mimidis, A., Kavatzikidou, P., Manousaki, A., Božinović, N., Rajić, V.,& Stratakis, E.. (2021). The surface array structures induced by femtosecond laser modifications of Ti/Cr multilayer thin films for biomedical applications. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade
Belgrade : Institute of Physics Belgrade., 156.
https://hdl.handle.net/21.15107/rcub_vinar_10914

Petrović S, Peruško D, Mimidis A, Kavatzikidou P, Manousaki A, Božinović N, Rajić V, Stratakis E. The surface array structures induced by femtosecond laser modifications of Ti/Cr multilayer thin films for biomedical applications. in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade. 2021;:156.
https://hdl.handle.net/21.15107/rcub_vinar_10914 .

Petrović, Suzana, Peruško, Davor, Mimidis, A., Kavatzikidou, P., Manousaki, A., Božinović, Nevena, Rajić, Vladimir, Stratakis, E., "The surface array structures induced by femtosecond laser modifications of Ti/Cr multilayer thin films for biomedical applications" in PHOTONICA2021 : 8th International School and Conference on Photonics and HEMMAGINERO workshop : Abstracts of Tutorial, Keynote, Invited Lectures, Progress Reports and Contributed Papers; August 23-27, 2021; Belgrade (2021):156,
https://hdl.handle.net/21.15107/rcub_vinar_10914 .

TY  - JOUR
AU  - Petrović, Suzana
AU  - Tsibidis, George D.
AU  - Kovačević, Aleksander
AU  - Božinović, Nevena
AU  - Peruško, Davor
AU  - Mimidis, Alexandros
AU  - Manousaki, Alexandra
AU  - Stratakis, Emmanuel
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10079
AB  - The experimental study of the static and dynamic femtosecond laser ablation of the multilayer 15x(Ti/Zr)/Si system is reported. The layer-by-layer selective laser ablation mechanism was studied by analysis of the surface morphology and elemental composition in static single pulse irradiation in a range of pulse energy from 10 to 17 $$\upmu $$J. The selective ablations, as number of concentric circles in modified spots are increased with the pulse energy. The boundary between the circles was shown a change in the depth, comparable to the thickness of the individual layers. Changes in the elemental composition at the edges are associated with the removal of the layer by layer. The dynamic multipulse irradiation was observed via the production of lines with laser-induced periodic surface structures (LIPSS) at different laser parameters (scan velocities and laser polarization). The spatial periodicity of the formed LIPSS depends on changes in the effective number of pulses and laser polarization, as well as the nature of the material. For better interpretation of the experimental results, simulations have been conducted to explore the thermal response of the multiple layered structure 15x(Ti/Zr) after static single pulse irradiation.
T2  - European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics
T1  - Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films
VL  - 75
IS  - 12
SP  - 304
DO  - 10.1140/epjd/s10053-021-00291-5
ER  - 

@article{
author = "Petrović, Suzana and Tsibidis, George D. and Kovačević, Aleksander and Božinović, Nevena and Peruško, Davor and Mimidis, Alexandros and Manousaki, Alexandra and Stratakis, Emmanuel",
year = "2021",
abstract = "The experimental study of the static and dynamic femtosecond laser ablation of the multilayer 15x(Ti/Zr)/Si system is reported. The layer-by-layer selective laser ablation mechanism was studied by analysis of the surface morphology and elemental composition in static single pulse irradiation in a range of pulse energy from 10 to 17 $$\upmu $$J. The selective ablations, as number of concentric circles in modified spots are increased with the pulse energy. The boundary between the circles was shown a change in the depth, comparable to the thickness of the individual layers. Changes in the elemental composition at the edges are associated with the removal of the layer by layer. The dynamic multipulse irradiation was observed via the production of lines with laser-induced periodic surface structures (LIPSS) at different laser parameters (scan velocities and laser polarization). The spatial periodicity of the formed LIPSS depends on changes in the effective number of pulses and laser polarization, as well as the nature of the material. For better interpretation of the experimental results, simulations have been conducted to explore the thermal response of the multiple layered structure 15x(Ti/Zr) after static single pulse irradiation.",
journal = "European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics",
title = "Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films",
volume = "75",
number = "12",
pages = "304",
doi = "10.1140/epjd/s10053-021-00291-5"
}

Petrović, S., Tsibidis, G. D., Kovačević, A., Božinović, N., Peruško, D., Mimidis, A., Manousaki, A.,& Stratakis, E.. (2021). Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 75(12), 304.
https://doi.org/10.1140/epjd/s10053-021-00291-5

Petrović S, Tsibidis GD, Kovačević A, Božinović N, Peruško D, Mimidis A, Manousaki A, Stratakis E. Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films. in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics. 2021;75(12):304.
doi:10.1140/epjd/s10053-021-00291-5 .

Petrović, Suzana, Tsibidis, George D., Kovačević, Aleksander, Božinović, Nevena, Peruško, Davor, Mimidis, Alexandros, Manousaki, Alexandra, Stratakis, Emmanuel, "Effects of static and dynamic femtosecond laser modifications of Ti/Zr multilayer thin films" in European Physical Journal D. Atoms, Molecules, Clusters and Optical Physics, 75, no. 12 (2021):304,
https://doi.org/10.1140/epjd/s10053-021-00291-5 . .