Displacement Processes of 1-Adamanetanethiol Self-Assembled Monolayers on Au(111) by 1-Hexanethiol
- Authors
- Son, Young Ji; Han, Seulki; Yoshizawa, Kaisei; Hayashi, Tomohiro; Hara, Masahiko; Noh, Jaegeun
- Issue Date
- Aug-2019
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Self-Assembled Monolayers; 1-Adamantanethiol; 1-Hexanethiol; Displacement; Scanning Tunneling Microscopy; Cyclic Voltammetry
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.19, no.8, pp.4732 - 4735
- Indexed
- SCIE
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 19
- Number
- 8
- Start Page
- 4732
- End Page
- 4735
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/147327
- DOI
- 10.1166/jnn.2019.16705
- ISSN
- 1533-4880
- Abstract
- Displacement processes of pre-adsorbed 1-admanetanethiol (ADT) self-assembled monolayers (SAMs) on Au(111) by 1-hexanethiol (HT) at room temperature were investigated by scanning tunneling microscopy (STM) and cyclic voltammetry (CV). Molecular-scale STM imaging clearly revealed that phase transitions from the (7 x 7) phase for ADT SAMs to the c(4 x 2) phase for HT SAMs via intermediate phase including bright aggregated islands and disordered phase. Moreover, it was found that ADT SAMs were completely displaced by HT molecules with a short hexyl chain within an hour. The CV measurements showed that cathodic peaks for SAM-modified Au(111) electrodes as a function of displacement time were varied with the structural change of displaced SAMs. Our results provide new insight into understanding the displacement processes of ADT SAMs on Au(111) by HT.
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