Adsorption of phenylalanine on single crystal rutile TiO2(110) surface

The adsorption of the aromatic amino acid, phenylalanine on a TiO2 rutile (110) 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 config...

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Bibliographic Details
Published in:Surface science 2007-09, Vol.601 (18), p.3828-3832
Main Authors: THOMAS, A. G, FLAVELL, W. R, CHATWIN, C. P, KUMARASINGHE, A. R, RAYNER, S. M, KIRKHAM, P. F, TSOUTSOU, D, JOHAL, T. K, PATEL, S
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Physics
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Summary:The adsorption of the aromatic amino acid, phenylalanine on a TiO2 rutile (110) 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 deg 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 CO groups.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2007.04.085