Growth mechanisms of octadecylphosphonic acid self-assembled monolayers on sapphire (corundum): Evidence for a quasi-equilibrium triple point

被引：35

作者：

Messerschmidt, C ^{[1
]}

Schwartz, DK ^{[1
]}

机构：

[1] Tulane Univ, Dept Chem, New Orleans, LA 70118 USA

来源：

LANGMUIR | 2001年 / 17卷 / 02期

关键词：

D O I：

10.1021/la001266m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Self-assembled monolayer growth of octadecylphosphonic acid on single-crystal C-face ( 1000) and R-face (1 (1) over bar 02) sapphire (corundum) has been investigated by ex situ tapping-mode atomic force microscopy, contact angle measurements, and Fourier transform infrared spectroscopy. The process of film formation is highly dependent on the temperature, a phenomenon that is explained by a three-phase model for film deposition. At low temperature, close-packed molecular islands nucleate and grow, surrounded by virtually bare substrate, analogous to a two-dimensional (2D) vapor-to-solid transition. At high temperature, on the other hand, the growth involves a 2D liquid-to-solid transition. Different growth kinetics are observed for the two crystal orientations, which can be related to the surface energetics.

引用

页码：462 / 467

页数：6

共 22 条

[1] FORMATION OF MONOLAYER FILMS BY THE SPONTANEOUS ASSEMBLY OF ORGANIC THIOLS FROM SOLUTION ONTO GOLD [J].