Regensburg 2025 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 13: Poster
DS 13.38: Poster
Donnerstag, 20. März 2025, 18:00–20:00, P1
Antibacterial activity of ZnO and Al doped ZnO nanocoatings — •Maria Stefanova1, Dimitrina Petrova1,2, Vladimira Videva1, Dimitre Dimitrov1,3, Nadia Todorova4, and Vera Marinova1 — 1Institute of Optical Materials and Technologies, Bulgarian Academy of Sciences, Sofia, Bulgaria — 2South-West University Neofit Rilski, Blagoevgrad, Bulgaria — 3Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia, Bulgaria — 4Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research Demokritos, Athens, Greece
Here we report on thin coatings of metal oxides (ZnO and ZnO doped with Al (AZO)) deposited by ALD technology. Their structural, surface-morphological and optical properties were investigated by AFM analysis, UV-Vis and fluorescence spectroscopy, as well as surface contact angle measurements. The antibacterial activity against Escherichia coli bacteria was evaluated in the dark and under ultraviolet light illumination. AZO nanocoatings were found to demonstrate more effective antibacterial action, mostly due to the improved sensitivity at UV spectral range as well as hydrophilicity in comparison with ZnO. The studied nanocoatings can serve as effective antimicrobial agents in a variety of applications.
Acknowledgements: This work is supported by the Bulgarian National Science Fund under the grant number KP-06-N-58/12 and the Research equipment of distributed research infrastructure INFRAMAT (part of Bulgarian National roadmap for research infrastructures) supported by Bulgarian Ministry of Education and Science.
Keywords: Atomic Layer Deposition; Metal and metal-oxide films; Surface contact angle; Antimicrobial activity