Electrochemical scanning tunneling microscopy examination of the structures of benzenethiol molecules adsorbed on Au(100) and Pt(100) electrodes

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	Electrochemical scanning tunneling microscopy examination of the structures of benzenethiol molecules adsorbed on Au(100) and Pt(100) electrodes
	G. Z. Liu; L. Y. O. Yang; C. H. Shue; H. I. Ma; S. L. Yau; S. H. Chen
	2007
发表期刊	Surface Science
ISSN	0039-6028
卷号	601 期号:1 页码:247-254
摘要	In situ electrochemical scanning tunneling microscopy (STM) has been used to examine the structures of benzenethiol adlayers on Au(100) and Pt(100) electrodes in 0.1 M HClO4, revealing the formation of well-ordered adlattices of Au(100)-(root 2x root 5) between 0.2 and 0.9 V and Pt(100)-(root 2 x root 2)R45 degrees between 0 and 0.5 V (versus reversible hydrogen electrode), respectively. The coverage of Au(100)-(root 2 x root 5) is 0.33, which is identical to those observed for upright alkanethiol admolecules on Au(111). In comparison, the coverage of Pt(100)-(root 2 x root 2)R45 degrees - benzenethiol is 0.5, much higher than those of thiol molecules on gold surfaces. This result suggests that berizenethiol admolecules on Pt(100) could stand even more upright than those on Au(100). All benzenethiol admolecules were imaged by the STM as protrusions with equal corrugation heights, suggesting identical molecular registries on Au(100) and Pt(100) electrodes, respectively. Modulation of the potential of a benzenethiol-coated Au(100) electrode resulted in irreversible desorption of admolecules at E <= 0.1 V (vs. reversible hydrogen electrode) and oxidation of admolecules at E >= 0.9 V. In contrast, benzenethiol admolecule was not desorbed from Pt(100) at potentials its negative as the onset of hydrogen evolution. Raising the potential tendered deposition of more benzenethiol molecules before oxidation of admolecules commenced at E > 0.9 V. (c) 2006 Elsevier B.V. All rights reserved.
部门归属	natl cent univ, dept chem, chungli 320, taiwan. shandong univ, dept chem, jinan 250100, peoples r china. tohoku univ, grad sch engn, dept appl chem, sendai, miyagi 9808579, japan. shandong univ, state educ minist, key lab colloid & interface chem, jinan 250100, peoples r china. state key lab corros & protect met, shenyang 110015, peoples r china.;yau, sl (reprint author), natl cent univ, dept chem, chungli 320, taiwan, taiwan;yau6017@ncu.edu.tw shchen@sdu.edu.cn
关键词	Scanning Tunneling Microscope Adsorption Benzenethiol Au(100) Pt(100) Solid-liquid Interface Self-assembled Monolayers Au(111) Adsorption Surfaces Butanethiol Pt(111) Gold Reconstruction Methanethiol Transitions
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WOS记录号	WOS:000243655000030
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33702
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	G. Z. Liu,L. Y. O. Yang,C. H. Shue,et al. Electrochemical scanning tunneling microscopy examination of the structures of benzenethiol molecules adsorbed on Au(100) and Pt(100) electrodes[J]. Surface Science,2007,601(1):247-254.
APA	G. Z. Liu,L. Y. O. Yang,C. H. Shue,H. I. Ma,S. L. Yau,&S. H. Chen.(2007).Electrochemical scanning tunneling microscopy examination of the structures of benzenethiol molecules adsorbed on Au(100) and Pt(100) electrodes.Surface Science,601(1),247-254.
MLA	G. Z. Liu,et al."Electrochemical scanning tunneling microscopy examination of the structures of benzenethiol molecules adsorbed on Au(100) and Pt(100) electrodes".Surface Science 601.1(2007):247-254.