Adsorption of phenylalanine on single crystal rutile TiO2(1 1 0) surface |
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| Authors: | AG Thomas WR Flavell AR Kumarasinghe PF Kirkham TK Johal |
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| Institution: | a School of Physics and Astronomy, University of Manchester, Sackville Street Building, Manchester, M60 1QD, UK
b CLRC Daresbury Laboratory, Warrington, Cheshire WA4 4AD, UK |
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| Abstract: | The adsorption of the aromatic amino acid, phenylalanine on a TiO2 rutile (1 1 0) single crystal surface has been investigated with photoemission and NEXAFS (near edge X-ray absorption fine structure) spectroscopy. The results indicate initial adsorption via the carboxylate group in a bidentate configuration with the phenyl ring oriented at approximately 25° to the surface normal. The amino group remains as NH2. Subsequent layers of phenylalanine appear to adsorb as neutral molecules with H-bonding between NH2 and C O groups. |
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| Keywords: | Titanium dioxide Single crystal Rutile Photoemission NEXAFS Amino acid Adsorption geometry |
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