Supramolecular architecture of organic molecules: PTCDA and CuPc on a Cu(1 1 1) substrate

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• 作者：M.C. Cottin ; ^{maren.cottin@uni-due.de} ; J. Schaffert ; A. Sonntag ; H. Karacuban ; R. Mö ; ller ; C.A. Bobisch
• 关键词：LT-STM ; PTCDA ; CuPc ; Mixed molecular structures ; LEED
• 刊名：Applied Surface Science
• 出版年：2012
• 出版时间：1 January 2012
• 年：2012
• 卷：258
• 期：6
• 页码：2196-2200
• 全文大小：1525 K

文摘

We report on the molecular self-assembly of a highly ordered mixed molecular structure of copper-phthalocyanine (CuPc) and 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) on Cu(1 1 1) starting from dense PTCDA domains. Low temperature scanning tunneling microscopy (LT-STM) data reveal the surface structure as the CuPc coverage is stepwise increased. A highly ordered mixed phase as well as a disordered mixed phase can be found, where the highly ordered mixed phase seems to be thermodynamically favored. Low energy electron diffraction (LEED) measurements aid the STM analysis. Tentative models for the formation of the highly ordered mixed phase are given.