Complexation of fullerenes on a pentacene-modified Au(111) surface

Yaw Chia Yang, Chih Hao Chang, Yuh Lang Lee

研究成果: Article

26 引文 斯高帕斯(Scopus)

摘要

A novel method is proposed to prepare an ordered array of pentacene adlayer on a Au(111) electrode by self-organization in benzene solution without using an ultra-high-vacuum (UHV) system. Because of the electron-rich characteristic, the pentacene monolayer acts as a template to incorporate electron-accepting fullerenes, forming a stable C60/pentacene complex adlayer. The adlayer structure was investigated by an in situ scanning tunneling microscopy (STM). Two adsorbed structures, (√31 × √13) and (6 × √31), were observed for the pentacene adlayer, For the C 60/pentacene complex adlayer, molecular resolution STM revealed two ordered arrays, (2√3 × 2√3)R30° and "in phase" structures, for the C60 molecules respected to the Au(111) substrate. The complex adlayer is stable between operational potential 0.35 and 0.9 V and is able to be decomplexed by selectively removing the fullerenes through the action of a high tip potential (0.75 V). The STM investigation also confirms that the complexation is performed by forming a C60/pentacene/Au(111) nanoarchitecture. Scanning tunneling spectroscopy (STS) analysis reveals a semiconductive characteristic on pentacene and a rectifying behavior on the C60/pentacene complex.

原文English
頁(從 - 到)6126-6130
頁數5
期刊Chemistry of Materials
19
發行號25
DOIs
出版狀態Published - 2007 十二月 11

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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