Vibrational study of water dimers on Pt(111) using a scanning tunneling microscope

被引：43
|
作者：
Motobayashi, K. [1 ,2 ]
Matsumoto, C. [1 ,3 ]
Kim, Y. [1 ]
Kawai, Maki [1 ,2 ]
机构：
[1] RIKEN, Surface Chem Lab, Wako, Saitama 3510198, Japan
[2] Univ Tokyo, Dept Adv Mat Sci, Chiba 2778583, Japan
[3] Gakushuin Univ, Dept Phys, Tokyo 1718588, Japan
来源：
SURFACE SCIENCE | 2008年 / 602卷 / 20期
关键词：
Scanning tunneling microscopy; Scanning tunneling spectroscopy; Surface diffusion; Surface structure; morphology; roughness; and topography; Vibrations of adsorbed molecules; Platinum; Water;
D O I：
10.1016/j.susc.2007.11.033
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Adsorption and diffusion of isolated water molecules such as monomers and dimers on Pt(111) surface were directly observed by the scanning tunneling microscopy (STM) at very low coverage and at low temperature. A water dimer appears as a 6-fold symmetric "flower-like" protrusion, which can be explained based on the model that a hydrogen bond acceptor molecule in the dirtier is rotating around a donor molecule. We obtained vibrational spectrum of individual water dimers by means of single-molecule vibrational spectroscopic method from the vibrationally-induced lateral hopping motions. Analyzing the spectra suggests a detailed model for adsorption structure of a water dimer where an acceptor molecule of the dimer points toward the surface to form O-H-Pt hydrogen bonding. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3136 / 3139
页数：4
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