Self-assembly of alkyl-substituted polyphenylene dendrimers on graphite

被引：38

作者：

Loi, S

Wiesler, UM

Butt, HJ ^{[1
]}

Müllen, K

机构：

[1] Univ Siegen, Inst Physiol Chem 2, D-57068 Siegen, Germany

[2] Max Planck Inst Polymer Res, D-55099 Mainz, Germany

来源：

MACROMOLECULES | 2001年 / 34卷 / 11期

关键词：

D O I：

10.1021/ma002090y

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The lateral organization of alkyl-substituted polyphenylene dendrimers on the basal plane of graphite has been investigated using atomic force microscopy. The dendrimers consist of a core of twisted, interlocked benzene rings and an external shell of dodecyl chains. Three kinds of dendrimers were used which in solution show a tetrahedral or a disklike shape. On graphite the dendrimers spontaneously form a stable, almost pinhole free monolayer. Complex two-dimensional arrangements and supramolecular ordering were observed in these monolayers prepared by spin-coating. One prominent structure observed with all three dendrimers was regions consisting of parallel rows of 6 nm spacing. In addition, pairs of dendrimers formed two-dimensional crystals on graphite. A simple model to interpret structure formation is discussed. The structure depends sensitively on the structure of the dendrimer. on the solvent, and on the concentration.

引用

页码：3661 / 3671

页数：11

共 36 条

[11] Structure of alkyl and perfluoroalkyl disulfide and azobenzenethiol monolayers on gold(111) revealed by atomic force microscopy [J].