High resolution X-ray photoelectron spectroscopy measurements of octadecanethiol self-assembled monolayers on Au(111)

Takao Ishida*, Masahiko Hara, Isao Kojima, Satoshi Tsuneda, Naoki Nishida, Hiroyuki Sasabe, Wolfgang Knoll

*この研究の対応する著者

研究成果: Article査読

236 被引用数 (Scopus)

抄録

We have measured high-resolution X-ray photoelectron spectroscopy (XPS) spectra of 1-octadecanethiol (ODT) self-assembled monolayers (SAMs) on a Au(111) surface in order to investigate the Au-S binding properties at the initial stage of SAM growth and after the desorption of the ODT from the Au surface. For the SAM prepared by the 1 min immersion into the ODT solution, we found new sulfur species around 161 eV and assigned it to isolated sulfur without C-S cleavage. We also confirmed the presence of a similar 161 eV peak in the S(2p) spectra after desorption of the ODT molecules. Furthermore, we observed a peak shift in the carbon 1s (C(1s)) peak, depending on the surface coverage of the ODT. In addition to the C(1s) peak of 285.1 eV which might correspond to alkyl chains of densely packed ODT molecules, another lower binding energy peak at 284.3 eV appeared after annealing. This lower C(1s) binding energy peak formation suggested that some of the alkyl chains for the remaining ODT molecules might be oriented parallel to the Au surface after annealing.

本文言語English
ページ(範囲)2092-2096
ページ数5
ジャーナルLangmuir
14
8
DOI
出版ステータスPublished - 1998 4 14

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 表面および界面
  • 分光学
  • 電気化学

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