Optimization of titanium and titanium alloy surface properties by ultra-short laser processing for improved antibacterial characteristics
Aceti DM, Daskalova A, Angelova L, Filipov E, Sotelo L, Andreeva A, Trifonov A, Buchvarov I (2022)
Publication Type: Conference contribution
Publication year: 2022
Publisher: IOP Publishing Ltd
Book Volume: 2240
Conference Proceedings Title: Journal of Physics: Conference Series
Event location: Sozopol
DOI: 10.1088/1742-6596/2240/1/012040
Abstract
The aim of the current study is to improve in a one step process the properties of Ti and Ti alloy surfaces by enhancing their bioactivity in order to provide better conditions for microbial rejection. We propose to alter the biomaterial characteristics by a method alternative to the chemical ones, namely, non-contact processing of the surface by ultra-short laser pulses. The laser-induced modification results in a surface with different topographic features and an increased presence of oxides. We performed hierarchical laser patterning of the surface inducing the formation of areas covered by nanostructures, or laser-induced periodic surface structures (LIPSS), alternating with areas covered by micropillars in their turn surmounted by LIPSS. The increased roughness achieved due to the presence of micropillars, together with a marked presence of oxides, has been proven by several studies to enhance the biocompatibility of the material by improving the surface wettability and, furthermore, promoting the cells adhesion and osseointegration, while reducing the adhesion of pathogens. The laser processed surface, consisting of a pattern of parallel lines, showed improved and anisotropic wettability. The water contact angle value decreased by â1/410° in a direction orthogonal to the lines of the pattern, and by â1/440° in a parallel direction.
Authors with CRIS profile
Involved external institutions
Sofia University "St. Kliment Ohridski" / Софийски университет "Св. Климент Охридски"
Bulgaria (BG)
Institute of Electronics “Academician Emil Djakov” (BAS IE) / Институт по електроника "Академик Емил Джаков"
Bulgaria (BG)
Bulgaria (BG)
Institute of Electronics “Academician Emil Djakov” (BAS IE) / Институт по електроника "Академик Емил Джаков"
Bulgaria (BG)
How to cite
APA:
Aceti, D.M., Daskalova, A., Angelova, L., Filipov, E., Sotelo, L., Andreeva, A.,... Buchvarov, I. (2022). Optimization of titanium and titanium alloy surface properties by ultra-short laser processing for improved antibacterial characteristics. In M.C.M. van de Sanden, Miglena Dimitrova, Chavdar Ghelev (Eds.), Journal of Physics: Conference Series. Sozopol, BG: IOP Publishing Ltd.
MLA:
Aceti, D. M., et al. "Optimization of titanium and titanium alloy surface properties by ultra-short laser processing for improved antibacterial characteristics." Proceedings of the 22nd International Summer School on Vacuum, Electron and Ion Technologies, VEIT 2021, Sozopol Ed. M.C.M. van de Sanden, Miglena Dimitrova, Chavdar Ghelev, IOP Publishing Ltd, 2022.
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