Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth

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

    Research output: Contribution to journalArticle

    70 Citations (Scopus)

    Abstract

    The surface-conditioning effect of gold substrates on n-octadecanethiol (ODT) self-assembled monolayer (SAM) growth was studied by X-ray photoelectron spectroscopy (XPS). The gold substrates were immersed in an ethanol solution containing 1 mM ODT for 1 h. The C/Au ratios of the ODT SAMs estimated by XPS formed on gold substrates depended on the amount of contamination on the gold surface. A full-coverage ODT SAM was successfully obtained on the gold substrate after ultraviolet light (UV)/ozone treatment for 1 h and rinsing with pure ethanol for 1 h. XPS measurements indicated that low contamination levels and a sulfur-free gold surface were obtained using this pretreatment and, hence, the adsorption of ODT molecules on gold proceeded efficiently. On the other hand, the C/Au ratio of an ODT SAM on a contaminated gold substrate was less following immersion in an ODT solution for 1 h, because surface contamination may reduce the adsorption rate of ODT molecules on the gold surface. When the gold substrate was rinsed with a chloroform solution for 1 h before SAM formation, the lowest C/Au ratio was obtained. XPS results showed that sulfur atoms quickly adsorbed onto the gold surface after chloroform rinsing and prevented the adsorption of ODT molecules onto the gold surface.

    Original languageEnglish
    Pages (from-to)4638-4643
    Number of pages6
    JournalLangmuir
    Volume13
    Issue number17
    Publication statusPublished - 1997 Aug 20

    Fingerprint

    Self assembled monolayers
    conditioning
    Gold
    gold
    Substrates
    X ray photoelectron spectroscopy
    photoelectron spectroscopy
    contamination
    Contamination
    Chloroform
    Chlorine compounds
    chloroform
    Sulfur
    Adsorption
    Molecules
    adsorption
    Ethanol
    ethyl alcohol
    x rays
    sulfur

    ASJC Scopus subject areas

    • Colloid and Surface Chemistry
    • Physical and Theoretical Chemistry

    Cite this

    Ishida, T., Tsuneda, S., Nishida, N., Hara, M., Sasabe, H., & Knoll, W. (1997). Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth. Langmuir, 13(17), 4638-4643.

    Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth. / Ishida, Takao; Tsuneda, Satoshi; Nishida, Naoki; Hara, Masahiko; Sasabe, Hiroyuki; Knoll, Wolfgang.

    In: Langmuir, Vol. 13, No. 17, 20.08.1997, p. 4638-4643.

    Research output: Contribution to journalArticle

    Ishida, T, Tsuneda, S, Nishida, N, Hara, M, Sasabe, H & Knoll, W 1997, 'Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth' Langmuir, vol. 13, no. 17, pp. 4638-4643.
    Ishida T, Tsuneda S, Nishida N, Hara M, Sasabe H, Knoll W. Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth. Langmuir. 1997 Aug 20;13(17):4638-4643.
    Ishida, Takao ; Tsuneda, Satoshi ; Nishida, Naoki ; Hara, Masahiko ; Sasabe, Hiroyuki ; Knoll, Wolfgang. / Surface-conditioning effect of gold substrates on octadecanethiol self-assembled monolayer growth. In: Langmuir. 1997 ; Vol. 13, No. 17. pp. 4638-4643.
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