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

    Research output: Contribution to journalArticle

    218 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)2092-2096
    Number of pages5
    JournalLangmuir
    Volume14
    Issue number8
    Publication statusPublished - 1998 Apr 14

    Fingerprint

    Self assembled monolayers
    X ray photoelectron spectroscopy
    photoelectron spectroscopy
    high resolution
    Binding energy
    Molecules
    Carbon
    Desorption
    x rays
    Sulfur
    Annealing
    carbon
    sulfur
    binding energy
    desorption
    molecules
    annealing
    submerging
    n-octadecyl mercaptan
    cleavage

    ASJC Scopus subject areas

    • Colloid and Surface Chemistry
    • Physical and Theoretical Chemistry

    Cite this

    Ishida, T., Hara, M., Kojima, I., Tsuneda, S., Nishida, N., Sasabe, H., & Knoll, W. (1998). High resolution X-ray photoelectron spectroscopy measurements of octadecanethiol self-assembled monolayers on Au(111). Langmuir, 14(8), 2092-2096.

    High resolution X-ray photoelectron spectroscopy measurements of octadecanethiol self-assembled monolayers on Au(111). / Ishida, Takao; Hara, Masahiko; Kojima, Isao; Tsuneda, Satoshi; Nishida, Naoki; Sasabe, Hiroyuki; Knoll, Wolfgang.

    In: Langmuir, Vol. 14, No. 8, 14.04.1998, p. 2092-2096.

    Research output: Contribution to journalArticle

    Ishida, T, Hara, M, Kojima, I, Tsuneda, S, Nishida, N, Sasabe, H & Knoll, W 1998, 'High resolution X-ray photoelectron spectroscopy measurements of octadecanethiol self-assembled monolayers on Au(111)', Langmuir, vol. 14, no. 8, pp. 2092-2096.
    Ishida, Takao ; Hara, Masahiko ; Kojima, Isao ; Tsuneda, Satoshi ; Nishida, Naoki ; Sasabe, Hiroyuki ; Knoll, Wolfgang. / High resolution X-ray photoelectron spectroscopy measurements of octadecanethiol self-assembled monolayers on Au(111). In: Langmuir. 1998 ; Vol. 14, No. 8. pp. 2092-2096.
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