Recent progress of nano-mechanical mapping

Toshio Nishi, Sae Nagai, So Fujinami, Ken Nakajima

    研究成果: Article査読

    6 被引用数 (Scopus)

    抄録

    Nano-mechanical mapping by atomic force microscopy has been developed as an useful application to measure mechanical properties of soft materials at nanometer scale. To date, the Hertzian theory was used for analyzing force-distance curves as the simplest model among several contact mechanics between elastic bodies. However, the preexisting methods based on this theory do not consider the adhesive interaction in principle, which cannot be neglected in the ambient condition. A new analytical method was introduced to estimate the elasticity and the adhesive energy simultaneously by means of the JKR theory, describing adhesive contact between elastic materials. Poly(dimethylsiloxane) (PDMS) and isobutylene-co-isoprene rubber (IIR) were analyzed to verify the applicable limit of the JKR analysis. For elastic samples such as PDMS, the force-deformation plots obtained experimentally were consistent with JKR theoretical curves. Meanwhile, for viscoelastic samples, especially for IIR, the experimental plots revealed large deviations from JKR curves depending on scanning velocity and maximum loading force. Some nano-rheological arguments were employed based on the difference between these specimens.

    本文言語English
    ページ(範囲)37-47
    ページ数11
    ジャーナルChinese Journal of Polymer Science (English Edition)
    27
    1
    DOI
    出版ステータスPublished - 2009 1

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Organic Chemistry
    • Polymers and Plastics

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