Formation and annealing effect of tolanethioacetate self-assembled monolayers on Au(111)

Youngdo Jeong, Wook Han Jin, Nakjoong Kim, Youngil Lee, Changjin Lee, Masahiko Hara, Jaegeun Noh

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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 (√ x 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 (√ x 2√)R7° structure. These results will be very useful in understanding the formation and thermal behavior of TTA SAMs on gold surfaces.

Original languageEnglish
Pages (from-to)2445-2448
Number of pages4
JournalBulletin of the Korean Chemical Society
Issue number12
Publication statusPublished - 2007 Dec 20



  • Annealing effect
  • Ordered domains
  • Scanning tunneling microscopy
  • Self-assembled monolayers
  • Tolanethioacetate

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