Load-Induced Frictional Transition at a Well-Defined Alkane Loop Surface

Atsuomi Shundo, Koichiro Hori, Yasuyuki Tezuka, Takuya Yamamoto, Keiji Tanaka

    研究成果: ジャーナルへの寄稿学術誌査読

    4 被引用数 (Scopus)

    抄録

    Self-assembled monolayers (SAMs) have attracted considerable attention as a tool to confer desirable properties on material surfaces. So far, molecules used for the SAM formation are generally limited to linear ones and thus chain ends dominate the surface properties. In this study, we have successfully demonstrated unique frictional properties of a SAM composed of alkane loops from cyclic alkanedisulfide on a gold substrate, where both sulfurs are bound to gold. The frictional response was proportional to the load. However, once the load went beyond a threshold value, the frictional response became more dominant. Such a frictional transition was reversible and repeatable and was not discerned for a corresponding SAM composed of n-alkyl chains. The load-induced change in the frictional response from the alkane loops could be associated with the conformational change of the alkane loops. The present results differ from most studies, in which the surface properties are designed on the basis of functional chain end groups.

    本文言語英語
    ページ(範囲)2396-2401
    ページ数6
    ジャーナルLangmuir
    33
    9
    DOI
    出版ステータス出版済み - 3月 7 2017

    !!!All Science Journal Classification (ASJC) codes

    • 材料科学一般
    • 凝縮系物理学
    • 表面および界面
    • 分光学
    • 電気化学

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