Construction of two-dimensional hydrogen clusters on Au(111) directed by phthalocyanine molecules

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• 作者：Kai Yang (1)
  Wende Xiao (1)
  Liwei Liu (1)
  Xiangmin Fei (1)
  Hui Chen (1)
  Shixuan Du (1)
  Hong-Jun Gao (1)
  
• 关键词：hydrogen ; manganese phthalocyanine ; Au(111) ; interfacial phase ; scanning tunneling microscopy
• 刊名：Nano Research
• 出版年：2014
• 出版时间：January 2014
• 年：2014
• 卷：7
• 期：1
• 页码：79-84
• 全文大小：909 KB
• 作者单位：Kai Yang (1)
  Wende Xiao (1)
  Liwei Liu (1)
  Xiangmin Fei (1)
  Hui Chen (1)
  Shixuan Du (1)
  Hong-Jun Gao (1)
  
  1. Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China
  
• ISSN：1998-0000

文摘

Low-dimensional H2 aggregates have been successfully fabricated on Au(111) surfaces and investigated by means of low temperature scanning tunneling microscopy. We use manganese phthalocyanine (MnPc) molecules anchored on the Au(111) surface to efficiently collect and pin hydrogen molecules. A two-dimensional (2D) molecular hydrogen cluster is formed around the MnPc. The hydrogen cluster exhibits bias-dependent topography and spatial-dependent conductance spectra, which are rationalized by the exponentially decreasing threshold energy with distance from the central MnPc to activate the motion of the H2 molecules. This exponential drop reveals an interfacial phase behavior in the 2D cluster.