Self-Assembly and Scanning Tunneling Microscopy Tip-Induced Motion of Ferrocene Adamantane Trithiolate Adsorbed on Au(111)
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概要
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We have studied the self-assembled monolayers (SAMs) of adamantane-based trithiolate, which consists of a ferrocene derivative at the head (ferrocene adamantane trithiolate; ferrocene-ATT), on Au(111) using low temperature scanning tunneling microscopy (STM). It was found that the adsorption behavior of ferrocene-ATT is similar to that of bromine adamantane trithiolate (BATT) adsorbed on Au(111). This indicates that adsorption of adamantane-based trithiol is controlled by three legs (CH2S) connected to bridgehead positions of the adamantane cage. Molecules, which form an ordered structure, are stable under low-bias-voltage scanning, i.e., a sample bias voltage lower than 1 V. STM tip-induced diffusion, however, was observed both for small clustered molecules and for molecules bound around the edge of an ordered molecular island. Furthermore, applying a high bias voltage (5 V) resulted in the destruction of SAMs structures.
- 2008-07-25
著者
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Kim Yousoo
Surface Chemistry Laboratory
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Katano Satoshi
Surface Chemistry Laboratory
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Kawai Maki
Surface Chemistry Lab. Riken (the Institute Of Physics And Chemistry Research):department Of Advance
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Kitagawa Toshikazu
Department Of Energy And Hydrocarbon Chemistry Graduate School Of Engineering Kyoto University
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Kitagawa Toshikazu
Department of Chemistry for Materials, Graduate School of Engineering, Mie University, Tsu 514-8507, Japan
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