Nanoribbons from conjugated macromolecules on amorphous substrates observed by SFM and TEM

被引:39
作者
Samori, P
Sikharulidze, I
Francke, V
Müllen, K
Rabe, JP
机构
[1] Humboldt Univ, Dept Phys, D-10115 Berlin, Germany
[2] Max Planck Inst Polymer Res, D-55021 Mainz, Germany
关键词
D O I
10.1088/0957-4484/10/1/015
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Micrometre long nanoribbons have been grown from solutions of functionalized poly(para-phenyleneethynylene)s (PPE)s on noncrystalline insulating substrates including glass and carbon coated copper grids. Tapping mode scanning force microscopy (SFM) and transmission electron microscopy (TEM) revealed that these nanostructures possess a molecular cross section with a typical thickness of 2-3 molecular layers and a width which reflects the distribution of macromolecular lengths. The ribbons are therefore quite similar to the ones found on the crystalline mica substrate except that they are not oriented within the surface plane. This indicates that the,growth of these architectures from solution is mainly governed by intermolecular interactions between the pi-conjugated macromolecules. The possibility to self-assemble these nanoribbons also on amorphous silica opens a prospect for their application as molecular nanowires bridging gold nanoelectrodes grown on oxidized silicon wafers.
引用
收藏
页码:77 / 80
页数:4
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