Reduction of Local Stress Concentration on Nanosheet in Layered Nanoparticles with Water Molecules

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  • Kiminori Sato
    Department of Environmental Sciences, Tokyo Gakugei University, Koganei 4-1-1, Tokyo, 184-8501, Japan
  • Kazuomi Numata
    Department of Environmental Sciences, Tokyo Gakugei University, Koganei 4-1-1, Tokyo, 184-8501, Japan
  • Koichiro Fujimoto
    Department of Environmental Sciences, Tokyo Gakugei University, Koganei 4-1-1, Tokyo, 184-8501, Japan

説明

<jats:p> The local stress concentration on 2D nanosheets is investigated for saponite layered nanoparticles by means of X-ray diffraction (XRD) and positronium (Ps) annihilation spectroscopy. XRD experiments indicated that the layered structure for the mechanochemically milled sample is maintained in the presence of H <jats:sub>2</jats:sub> O molecules. Ps annihilation studies of self-assembly revealed that the 2D nanosheets are well in-plane ordered after uniaxial pressure compaction without H <jats:sub>2</jats:sub> O molecules due to the efficient propagation of stress concentration. The present results of both XRD and Ps lifetime spectroscopy clearly demonstrates that the stress concentration on the 2D nanosheets can be reduced in the presence of H <jats:sub>2</jats:sub> O molecules. </jats:p>

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