Direct observation of organic-organic heteroepitaxy:: perylene-tetracarboxylic-dianhydride on hexa-peri-benzocoronene on highly ordered pyrolytic graphite

被引：67

作者：

Schmitz-Hübsch, T

Sellam, F

Staub, R

Törker, M

Fritz, T ^{[1
]}

Kübel, C

Müllen, K

Leo, K

机构：

[1] Tech Univ Dresden, Inst Angew Photophys, D-01062 Dresden, Germany

[2] Max Planck Inst Polymerforsch, D-55172 Mainz, Germany

来源：

SURFACE SCIENCE | 2000年 / 445卷 / 2-3期

关键词：

hexabenzocoronene; HOPG; organic-organic epitaxy; PTCDA; scanning tunneling microscopy;

D O I：

10.1016/S0039-6028(99)01081-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We investigate the heteroepitaxial growth of two films of large planar molecules on an inorganic substrate: for the particular system [perylene-tetracarboxylic-dianhydride (PTCDA) on hexa-peri-benzocoronene (HBC) on highly ordered pyrolytic graphite (HOPG)], large domains of several hundred of nanaometers in size with interfaces that are flat and almost defect-free on the molecular scale are observed using scanning tunneling microscopy (STM). The images obtained represent, to the best of our knowledge, the first STM observation of the ordered growth of large planar molecules in a heteroepitaxially stacked film. The mutual lattice alignment and epitaxial relations between the two organic layers are determined from the pronounced moire pattern in the STM images. Beside these findings, the intramolecular contrast of HBC on HOPG is used to determine the molecular orientation of the molecules within the two-dimensional unit cell by STM. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：358 / 367

页数：10

共 38 条

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