SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 40: Poster: Semiconductor Substrates
O 40.4: Poster
Dienstag, 28. März 2023, 18:00–20:00, P2/EG
Adsorption of spike amino acids, asparagine and cysteine, on the surface of model catalyst TiO2 — •Miguel Blanco Garcia1, Mona Kohantorabi1, Michael Wagstaffe1, Mohammad Tehrani1, Silvan Dolling1, Andreas Stierle1, 2, and Heshmat Noei1 — 1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany — 2Mathematics, Informatics, and Natural Sciences (MIN) Faculty, University of Hamburg, 20354 Hamburg, Germany
Titanium oxides are excellent candidates for the inactivation of viruses using light due to their photocatalytic properties [1]. In this study we are aiming to determine the mechanism of inactivation of SARS-CoV-2 on TiO2 under ultraviolet treatment [2]. The two most abundant amino acids in the spike protein of the SARS-CoV-2 virus (cysteine and asparagine) [3] are adsorb under UHV and aqueous solution on TiO2 surfaces. Surface sensitive techniques such as X-ray photoelectron spectroscopy shows changes in the amino acids upon UV treatment. Furthermore, scanning tunneling microscopy demonstrates the disposition of the amino acid molecules on the surface and the changes upon UV irradiation. GISAXS data was obtain at DESY P03 for the adsorption in aqueous solution, to understand the adsorption geometry and self-assembly of the cysteine amino acids on the rutile and anatase TiO2 surfaces.
References: [1] Diebold, U. Surface science reports 48.5 (2003): 53-229. [2] Kohantorabi, et al., ACS Appl. Mater. Interface., Under Review. [3] Wang D, et al., Nano today 40 (2021): 101243.