SCANNING-TUNNELING-MICROSCOPY IMAGING OF SINGLE FLUORINE ATOM SUBSTITUTION IN STEARIC-ACID

被引：56

作者：

STABEL, A

DASARADHI, L

OHAGAN, D

RABE, JP

机构：

[1] UNIV DURHAM,DEPT CHEM,SCI LABS,DURHAM DH1 3LE,ENGLAND

[2] MAX PLANCK INST POLYMER RES,D-55021 MAINZ,GERMANY

[3] UNIV MAINZ,INST PHYS CHEM,D-55099 MAINZ,GERMANY

来源：

LANGMUIR | 1995年 / 11卷 / 05期

关键词：

D O I：

10.1021/la00005a003

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper we report on the effect that a single fluorine substitution in a hydrocarbon chain of stearic acid has on the molecular ordering of the material. and, in addition, the effect that the fluorines have on the scanning tunneling microscopy (STM) contrast of an alkyl chain physisorbed on graphite. The area demand due to a single fluorine substitution is increased by only approximately 1%, demonstrating a very similar steric impact of hydrogen and fluorine. The required accuracy in the measurement is achieved by evaluating the moire pattern due to the adsorbate and substrate lattices. The predicted change in the STM contrast caused by the fluorine atom was observed for the first time.

引用

页码：1427 / 1430

页数：4

共 28 条

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