Phase transition of thiophene molecules on Au(111) in solution

被引：38
|
作者：
Su, GJ
Zhang, HM
Wan, LJ [1 ]
Bai, CL
机构：
[1] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China
来源：
SURFACE SCIENCE | 2003年 / 531卷 / 03期
关键词：
gold; surface thermodynamics (including phase transitions); electrochemical methods; scanning tunneling microscopy;
D O I：
10.1016/S0039-6028(03)00542-9
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：
The orientation and packing arrangement of thiophene molecules on a well-defined Au(1 1 1) surface in 0.1 M HClO4 solution have been investigated as a function of applied potentials by in situ scanning tunneling microscopy (STM) and electrochemical method. Thiophene molecules are found to form highly ordered adlayers in the double layer region. High-resolution STM images reveal different adlayer structures. Thiophene molecules take flat-lying and vertical orientation at 0.3 and 0.6 V, respectively. Compared with the results of electrochemical measurement, we concluded that the phase transition of thiophene on Au(1 1 1) occurs as the potential is changed between 0.1 and 0.65 V. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：L363 / L368
页数：6
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