The self-assembly mechanism of alkanethiols on Au(111)

被引:751
作者
Poirier, GE
Pylant, ED
机构
[1] UNIV TEXAS,DEPT CHEM & BIOCHEM,AUSTIN,TX 78712
[2] NATL INST STAND & TECHNOL,GAITHERSBURG,MD 20899
关键词
D O I
10.1126/science.272.5265.1145
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
The self-assembly mechanism of alkanethiol monolayers on the (111) surface of gold was discovered with the use of an ultrahigh-vacuum scanning tunneling microscope. Monolayer formation follows a two-step process that begins with condensation of low-density crystalline islands, characterized by surface-aligned molecular axes, from a lower density lattice-gas phase. At saturation coverage of this phase, the monolayer undergoes a phase transition to a denser phase by realignment of the molecular axes with the surface normal. These studies reveal the important role of molecule-substrate and molecule-molecule interactions in the self-assembly of these technologically important material systems.
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页码:1145 / 1148
页数:4
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