Rubidium Doped Metal-Free Phthalocyanine Monolayer Structures on Au(111)

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• 作者：Katharina Nilson ; John Å ; hlund ; Masumeh-Nina Shariati ; Emmanuelle Gthelid ; På ; l Palmgren ; Joachim Schiessling ; Simon Berner ; Nils Må ; rtensson ; Carla Puglia
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：July 22, 2010
• 年：2010
• 卷：114
• 期：28
• 页码：12166-12172
• 全文大小：373K
• 年卷期：v.114,no.28(July 22, 2010)
• ISSN：1932-7455

文摘

Scanning tunneling microscopy (STM) studies of monolayer of metal-free phthalocyanine (H₂Pc) adsorbed on Au(111) have shown ordered arrangement of the molecules on the surface. Evaporation of H₂Pc onto the Au(111) surface and post annealing of the sample to 670 K results in a densely packed structure of the molecules. The monolayer is characterized by molecules adsorbed with the molecular plane parallel to the substrate surface in a square adsorption unit cell. Furthermore, the high resolution images revealed the orientation of individual molecules. The H₂Pc/Au(111) system has also been doped by rubidum and compared to the undoped layers. The Rb affects the molecular adsorption geometry, and a hexagonal unit cell is found for the coadsorption of H₂Pc and Rb. Upon doping, highly ordered Rb-induced protrusions are observed at the benzene site of adsorbed molecules.