Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Formation and Annealing Effect of Tolanethioacetate Self-Assembled Monolayers on Au(111)

  • Jeong, Young-Do (Department of Chemistry, Hanyang University) ;
  • Han, Jin-Wook (Department of Chemistry, Hanyang University) ;
  • Kim, Nak-Joong (Department of Chemistry, Hanyang University) ;
  • Lee, Young-Il (Department of Chemistry, Ulsan University) ;
  • Lee, Chang-Jin (Advanced Material Division, Korea Research Institute of Chemical Technology) ;
  • Hara, Masahiko (Emergent Functions Asian Collaboration Laboratory, Frontier Research System, RIKEN) ;
  • Noh, Jaeg-Eun (Department of Chemistry, Hanyang University)
  • Published : 2007.12.20
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Abstract

Self-assembled monolayers (SAMs) were formed by adsorption of thioacetyl-terminated tolanethioacetate (TTA) on Au(111) in a 0.5-mM ethanol solution after one day immersion at room temperature. Molecular-scale STM imaging revealed that the TTA SAMs were composed of two mixed phases; an ordered phase with small domains describing a ( × 2 )R30° structure and a disordered phase. Interestingly, after annealing the precovered TTA SAMs on Au(111) at 90 °C for 1 h, the small ordered domains grew unidirectionally, resulting in the formation of unique rod-like domains, which were assigned a ( × 2 )R7° structure. These results will be very useful in understanding the formation and thermal behavior of TTA SAMs on gold surfaces.

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