Imaging elastic properties of soft materials immersed in water using force modulation mode in atomic force microscopy

Hisashi Haga*, Shigeo Sasaki, Mayumi Morimoto, Kazushige Kawabata, Etsuro Ito, Kazuhiro Abe, Takashi Sambongi

*この研究の対応する著者

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Using the force modulation mode in atomic force microscopy (AFM), we have succeeded in imaging elastic properties of agar gels immersed in water. The elastic images of agar have been captured simultaneously with the topographic images. Stiffer grains of agar whose size is about 200 nm can be clearly seen in the elastic image of 3.0% agar, while they are not so visible in the case of 1.5% agar. These grains probably correspond to aggregation of agar which cannot be observed in the topographic images. We also measured force-versus-distance curves using AFM to confirm that the absolute values of elastic modulus (Young's modulus) of agar coincide with the bulk values measured using the conventional stress-strain method. The estimated values of the elastic moduli with the AFM were 40 and 90 kPa for 1.5% and 3.0% agar gels, respectively. These are in good agreement with the respective bulk values of 30 and 80 kPa obtained using the conventional method.

本文言語English
ページ(範囲)3860-3863
ページ数4
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
37
6 SUPPL. B
DOI
出版ステータスPublished - 1998 6月
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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