Adsorption of phenylalanine on single crystal rutile TiO₂(1 1 0) surface

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• 作者：A.G. Thomas ; W.R. Flavell ; C.P. Chatwin ; A.R. Kumarasinghe ; S.M. Rayner ; P.F. Kirkham ; D. Tsoutsou ; T.K. Johal ; S. Patel
• 关键词：Titanium dioxide ; Single crystal ; Rutile ; Photoemission ; NEXAFS ; Amino acid ; Adsorption geometry
• 刊名：Surface Science
• 出版年：2007
• 期刊代码：104_00396028
• 类别：ch
• 出版时间：15 September 2007
• 卷：601
• 期：18
• 页码：3828-3832
• 文件大小：475 K

摘要

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 Cttp://www.sciencedirect.com/scidirimg/entities/dbnd" alt="double bond; length as m-dash" border=0>O groups.