原子間力顕微鏡によるソフトマテリアルの弾性率定量評価法の開発

抄録

  The current status of quantitative elastic modulus evaluation of soft-materials, which is based on atomic force microscopy, is described together with planned ISO standardization activity. Force-displacement curves on the surfaces of soft-materials are measured in this procedure. The emphasis will be placed on how Hertz or Derjaguin-Muller-Toporov (DMT) contact mechanics fails to fit the experimental curves and alternatively how Johnson-Kendall-Roberts (JKR) model can solve the problem. To obtain a two-dimensional map of elastic modulus based on the above-mentioned analysis, so-called force-volume technique is employed. Several examples will be shown including vulcanized isoprene rubber and high-density polyethylene.