Complex structural dynamics at adsorbed alkanethiol layers at Au(111) single-crystal domains

被引：46

作者：

Arce, FT ^{[1
]}

Vela, ME ^{[1
]}

Salvarezza, RC ^{[1
]}

Arvia, AJ ^{[1
]}

机构：

[1] Inst Invest Fisicoquim Teor & Aplicadas, RA-1900 La Plata, Argentina

来源：

LANGMUIR | 1998年 / 14卷 / 25期

关键词：

D O I：

10.1021/la9805286

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The structure and dynamics of dodecanethiol and butanethiol monolayers adsorbed on Au(lll) at 298 K have been followed by in situ and ex situ scanning tunneling microscopy (STM). Results show that a gaslike initial adsorption stage where monatomic deep pit clustering occurs is followed by an advanced adsorption stage in which adlayer structural changes p(nx1) double right arrow (root 3x root 3)R30 degrees double left right arrow c(4x2) take place. The first change is interpreted as the motion of adsorbed molecules from fee to hcp sites, and the second one is explained by the fluctuations of adsorbed molecules from hollow to bridge sites. The structural fluctuations at adsorbate domains occur simultaneously with fluctuations in the size of monatomic deep pits. These processes reveal the complexity of surface dynamics of alkanethiol adlayers on Au(lll) at 298 K.

引用

页码：7203 / 7212

页数：10

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