Influence of substrate morphology on organic layer growth: PTCDA on Ag(111)

被引：64

作者：

Marchetto, H.

Groh, U.

Schmidt, Th.

Fink, R.

Freund, H. -J.

Umbach, E.

机构：

[1] Univ Wurzburg, D-97074 Wurzburg, Germany

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

[3] Univ Erlangen Nurnberg, D-91058 Erlangen, Germany

来源：

CHEMICAL PHYSICS | 2006年 / 325卷 / 01期

关键词：

photoelectron emission microscopy; OMBE; growth kinetics; nucleation;

D O I：

10.1016/j.chemphys.2006.01.006

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：

By UV-excited photoelectron emission microscopy (UV-PEEM) we investigated the microscopic growth behavior of organic thin films using 3,4,9,10-perylene-tetracarboxylicacid dianhydride (PTCDA) on a Ag(111) single crystal substrate as example. Direct, real time observation allows to correlate the initial growth modes and the related kinetic parameters with substrate properties like terrace width, step density, and step bunches from the submonolayer range up to 5 layers or more. Above room temperature PTCDA grows in a Stranski-Krastanov fashion: after completion of the first two stable layers three-dimensional islands are formed. The nucleation density strongly depends on the temperature and the substrate morphology thus affecting the properties of the organic film. (c) 2006 Elsevier B.V. All rights reserved.

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页码：178 / 184

页数：7

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