Adsorption Behanior of Biomolecule on Slneiconductor and Metal Sunforces.

生物分子在半导体和金属太阳力上的吸附行为。

• 批准号: 12650684
• 负责人: YAGI Shinya
• 金额: $ 2.3万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650684/
• 关键词: Molecularadsorption; Synchrotron radiation; NEXAFS; XPS; Dimethyl sulfide; Ni; Cu; L-cysteine; XAFS; (CH_3)_2S; Ni(100); Cu(100); 吸着構造

We have studied the (CH_3)_2S/Ni(100) and (CH3)2S/Cu(100) systems using polarization dependent S K-edge Near Edge X-ray Absorption Fine Structure (NEXAFS) and S Is X-ray Photoelectron Spectroscopy (XPS) techniques. Polarization dependence was noticeable in the S K-edge NEXAFS spectra for submonolayer phase. The NEXAFS results imply that the (CH_3)_2S molecule is lying flat on the Ni(100) surface and has some tilt angle of 33°on the Cu(100) surface. As for the Ni(lOO) surface, it is cleared that a surface reaction is higher than the Cu(lOO) surface. Adsorption behavior of a sulfur-containing amino molecule on metal surface has been interested in a bio-catalytic and surface reaction fields. In this study, we have studied an adsorption behavior of the L-cysteine amino acid, which contain the sulfur atom, on polycrystalline Cu, Mo and Ni surfaces by S Kiedge NEXAFS and XPS techniques. Noticeable difference can be seen at the first feature (1s-σ(S-C)) of the NEXAFS spectra. Thess results imply that the L-cysteine molecule is more active on the Ni surface in comparison with the Cu or Mo surfaces. It seems that the charge transfer occurs from the substrate to the sulfur atom of the L-cysteine molecule for the Ni adsorption system.

本文用偏振相关的S K边近边X射线吸收精细结构（NEXAFS）和S Is X射线光电子能谱（XPS）研究了（CH_3）_2S/Ni（100）和（CH_3）_2S/Cu（100）体系。在S K边NEXAFS谱中，亚单层相的偏振依赖性是明显的。NEXAFS结果表明，（CH_3）_2S分子平放在Ni（100）面上，在Cu（100）面上有33°的倾斜角。对于Ni（100）表面，清楚的是表面反应高于Cu（100）表面。含硫氨基分子在金属表面的吸附行为是生物催化和表面反应领域的研究热点。本文利用S Kiedge NEXAFS和XPS技术研究了含硫的L-半胱氨酸氨基酸在多晶Cu、Mo和Ni表面的吸附行为。在NEXAFS谱的第一个特征（1 s-σ（S-C））处可以看到显著的差异。这些结果表明，L-半胱氨酸分子在Ni表面上比在Cu或Mo表面上更活跃。对于Ni吸附体系，似乎发生了从基底到L-半胱氨酸分子硫原子的电荷转移。

项目成果

S.Yagi et al.: "MOLECULAR ADSORPTION OF (CH3)2S ON Ni(100) STUDIED BY S K-EDGE NEXAFS AND XPS "Surface Science. (in press.).

S.Yagi 等人：“SK-EDGE NEXAFS 和 XPS 研究了 (CH3)2S 在 Ni(100) 上的分子吸附”表面科学。

S.Yagi et al.: "Design and Performance of a Soft X-ray Double Crystal Monochromator at HSRC"Nuclear Instruments and Methods A. 467-468. 723-726 (2001)

S.Yagi 等人：“HSRC 软 X 射线双晶单色仪的设计和性能”核仪器和方法 A. 467-468。

S.Yagi et al.: "DESIGN AND PERFORMANCE OF A SOFT X-RAY DOUBLE CRYSTAL MONOCHROMATOR AT HSRC"NIM.A. (in press.).

S.Yagi 等人：“HSRC 软 X 射线双晶单色仪的设计和性能”NIM.A。

S.Yagi et al.: "Structural Study on (CH_3)_2/Cu(100) by Near Edge X-ray Adsorption Fine Sturcture and X-ray Photoelectron Spectroscopy"Journal of Vacuum Science and Technology A. (in press). (2002)

S.Yagi等人：“通过近边X射线吸附精细结构和X射线光电子能谱对(CH_3)_2/Cu(100)进行结构研究”真空科学与技术杂志A.（出版中）。

S. Yagi, Y. Matsumura, Y. Nakano, E. Ikenaga S. A. Sardar, J. A. Syed, K. Soda, E. Hashimoto, K. Tanaka and M. Taniguchi: "Adsorption Behavior of Sulfur-Containing Molecule on Transition Surfece Studied by S K-edge NEXAFS,"Nuclear. Instruments and Methods

S. Yagi、Y. Matsumura、Y. Nakano、E. Ikenaga S. A. Sardar、J. A. Syed、K. Soda、E. Hashimoto、K. Tanaka 和 M. Taniguchi：“含硫分子在过渡表面上的吸附行为研究