Abstract
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.
Original language | English |
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Pages (from-to) | 6156-6159 |
Number of pages | 4 |
Journal | Japanese journal of applied physics |
Volume | 47 |
Issue number | 7 PART 3 |
DOIs | |
Publication status | Published - 2008 Jul 18 |
Externally published | Yes |
Keywords
- Au(111)
- Ferrocene
- Molecular electronics
- Molecular tripod
- Scanning tunneling microscopy
- Self-assembled monolayers
- Thiol
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)