Adlayer structure of octa-alkoxy-substituted copper(II) phthalocyanine on Au(111) by electrochemical scanning tunneling microscopy

Li Wang, Liangyue Ou-Yang, Shueh Lin Yau

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Electrochemical scanning tunneling microscopy (ECSTM) has been used to examine the adlayer of octa-alkoxy-substituted copper(II) phthalocyanines (CuPc(OC8H17)8) on Au(111) in 0.1 M HClO 4, where the molecular adlayer was prepared by spontaneous adsorption from a benzene solution containing this molecule. Topography STM scans revealed long-range ordered, inter-weaved arrays of CuPc(OC8H 17)8 with coexistent rectangular and hexagonal symmetries. High-quality STM molecular resolution yielded the internal molecular structure and the orientation of CuPc(OC8H17)8 admolecules. These STM results could shed insight into the method of generating ordered molecular assemblies of phthalocyanine molecules with long-chained substitutes on metal surface.

Original languageEnglish
Pages (from-to)20-25
Number of pages6
JournalMicroscopy Research and Technique
Volume71
Issue number1
DOIs
StatePublished - Jan 2008

Keywords

  • Adlayer
  • Au(111)
  • Electrochemical scanning tunneling microscopy
  • Octa-alkoxy-substituted copper (II) phthalocyanine

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