Titel
Enhanced biocidal activity of Pr3+ doped yttrium silicates by Tm3+ and Yb3+ co-doping
Autor*in
Patryk Fałat
Institute of Advanced Materials, Faculty of Chemistry, Wroclaw University of Science and Technology
Irena Maliszewska
Department of Organic and Medicinal Chemistry, Faculty of Chemistry, Wroclaw University of Science and Technology
... show all
Abstract
We present an enhancement of optically triggered anti-microbial treatment based on visible to ultraviolet up-conversion emission in lanthanide-doped yttrium silicates. A series of Pr3+/Tm3+/Yb3+ co-doped Y2Si2O7 powders was synthesized and characterized, including determination of their crystal structure, morphology, and spectroscopic properties. The emphasis was put on the examination of the influence of lanthanide ion doping on the luminescence characteristics in the ultraviolet region of light, since the emission from this part of the spectra can be effectively used for decontamination purposes. Due to the additional Tm3+ doping into the Pr3+ containing Y2Si2O7 powders, we observed up-conversion emission lines in both UVA and UVC regions of spectra, while the solely Pr3+ doped materials gave only the emission in the UVC region. The synthesized luminescent powders were further used for decontamination experiments with three different types of pathogenic microorganisms (i.e., A. baumannii, S. aureus, and C. albicans) formed biofilms. The microbial cell viability studies demonstrated the higher deactivation efficiency for all investigated microbial species with the use of combined UVA and UVC irradiation generated by Pr3+ and Tm3+ co-doped phosphors. At the same time, the incorporation of Yb3+ ions could additionally offer an alternative NIR-to-UVA excitation pathway via a 980 nm laser diode, which is beneficial for deeper light penetration experiments.
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
phaidra.univie.ac.at/o:2068838
Erschienen in
Titel
Materials Advances
Band
4
Ausgabe
22
ISSN
2633-5409
Erscheinungsdatum
2023
Seitenanfang
5827
Seitenende
5837
Publication
Royal Society of Chemistry (RSC)
Erscheinungsdatum
2023
Zugänglichkeit
Rechte
Rechteangabe
© 2023 The Author(s)
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