Elastic and viscoelastic characterization of inhomogeneous polymers by bimodal atomic force microscopy

Hung K. Nguyen, Makiko Ito, Ken Nakajima

    研究成果: Article

    17 引用 (Scopus)

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    The elastic and viscoelastic responses of inhomogeneous polymers upon interacting with an atomic force microscopy (AFM) probe are simultaneously characterized by a bimodal AFM approach namely the amplitude- And frequency-modulation (AM-FM) method. In this approach, the AFM probe is operated in the AM mode at the first flexural frequency and in the FM mode at a higher flexural frequency. The AM mode provides information about the viscoelasticity of polymers in terms of the mechanical loss tangent, whereas the modulus of polymers is obtained as a function of the frequency shift of flexural frequencies in both modes. For a glassy polymer blend, the AM-FM method provides a consistent result in both the elastic modulus and loss tangent in comparison with those obtained by other methods. Moreover, a significant improvement of the contrast and lateral resolution in the AM-FM modulus image can be observed. However, the current approach shows a substantial increase in the modulus of rubbery polymers.

    元の言語English
    記事番号08NB06
    ジャーナルJapanese journal of applied physics
    55
    発行部数8
    DOI
    出版物ステータスPublished - 2016 8

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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