Spatially and rotationally oriented adsorption of molecular adsorbates on Ag(111) investigated using cryogenic scanning tunneling microscopy

被引：34

作者：

Chen, X ^{[1
]}

Frank, ER ^{[1
]}

Hamers, RJ ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT CHEM,MADISON,WI 53706

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B | 1996年 / 14卷 / 02期

关键词：

D O I：

10.1116/1.588415

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The molecular adsorption of thiophene and 2,5-dimethylthiophene on Ag(111) surfaces is studied using a cryogenic scanning tunneling microscope (STM) operating at 120 K. Thiophene molecules are observed to adsorb preferentially at step edges, occupying the upper step edge at lowest coverage, and additionally occupying the lower step edge at higher coverage. The adsorption site and rotational orientation of 2.5-dimethylthiophene were identified. Molecules at step edges art: observed to cluster, indicating an attractive interaction between molecules at step edges. As the coverage increases, a phase transition corresponding to a transition from a planar to a tilted geometry is observed. (C) 1996 American Vacuum Society.

引用

页码：1136 / 1140

页数：5

共 23 条

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