STM 研究非离子氟表面活性剂 Zonyl FSN 在 Au(100)上的自组装：[阵列：见正文]分子晶格、波纹和吸附增强迁移率。

STM study on nonionic fluorosurfactant zonyl FSN Self-Assembly on Au(100): [array: see text] molecular lattice, corrugations, and adsorbate-enhanced mobility.

机构信息

State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, PR China.

出版信息

Langmuir. 2010 Mar 16;26(6):3829-34. doi: 10.1021/la903250m.

DOI:10.1021/la903250m

PMID:20058870

Abstract

Nonionic fluorosurfactant zonyl FSN self-assembly on Au(100) is investigated by using scanning tunneling microscopy under ambient conditions. High-resolution STM images reveal that a [array: see text] arrangement of the FSN SAMs is formed on Au(100). Different from the uniform structure of FSN SAMs on Au(111), the adsorption sites of FSN molecules on Au(100) change gradually and form a kind of corrugated structure. The change in the adsorption sites probably originates from the repulsive force among FSN molecules because the nearest-neighbor distance of FSN molecules is 0.41 nm, which is smaller than 0.50 nm on Au(111). The mobility of surface atoms on the Au substrate is enhanced by the interaction between FSN molecules and the Au substrate; therefore, no Au island is observed on the FSN-SAM-covered Au(100).

摘要

在环境条件下，使用扫描隧道显微镜研究了非离子氟表面活性剂 Zonyl FSN 在 Au(100)上的自组装。高分辨率 STM 图像显示，FSN SAM 形成了[array: see text]排列。与 Au(111)上 FSN SAM 的均匀结构不同，FSN 分子在 Au(100)上的吸附位置逐渐发生变化，形成一种波纹结构。吸附位置的变化可能源于 FSN 分子之间的排斥力，因为 FSN 分子的最近邻距离为 0.41nm，小于 Au(111)上的 0.50nm。FSN 分子与 Au 基底之间的相互作用增强了 Au 基底表面原子的迁移率；因此，在 FSN-SAM 覆盖的 Au(100)上没有观察到 Au 岛。