Formation and Structural Changes of 4-Fluorobenzenethiol Self-Assembled Monolayers on Au(111)
- Authors
- Seong, Sicheon; Kang, Hungu; Han, Seulki; Sung, Taehyun; Park, Joon B.; Hayashi, Tomohiro; Hara, Masahiko; Noh, Jaegeun
- Issue Date
- Aug-2017
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Fluorobenzenethiols; Self-Assembled Monolayers; Structural Order; Scanning Tunneling Microscopy; Cyclic Voltammetry
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.17, no.8, pp.5597 - 5600
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 17
- Number
- 8
- Start Page
- 5597
- End Page
- 5600
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/151859
- DOI
- 10.1166/jnn.2017.14162
- ISSN
- 1533-4880
- Abstract
- The surface structure and electrochemical behavior of 4-fluorobenzenethiol (4-FBT) self-assembled monolayers (SAMs) on Au(111) formed by vapor deposition at 323 K as a function of deposition time were examined by scanning tunneling microscopy (STM) and cyclic voltammetry (CV) measurements. STM observations clearly revealed that 4-FBT SAMs after 10 min or 6 h deposition were composed of disordered and ordered domains containing many gold adatom islands. The size of ordered domains with a molecular row structure was also relatively small, ranging from 10 to 50 nm. After longer deposition for 24 h, the structural quality of 4-FBT SAMs was greatly enhanced with large ordered domains (>50 nm) and without gold adatom islands. CV measurements demonstrated that the blocking efficiency of the electrodes for redox reactions increased with the improvement in the structural quality of 4-FBT SAMs on Au(111), consistent with the STM results. Our results obtained here will be very useful in understanding the formation of 4-FBT SAMs on Au(111) and obtaining the high-quality SAMs.
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