NMR studies on supercritical fluids in nanoporous materials

Yusuke Hiejima, Mitsuhiro Kanakubo, Kimitaka Minami, Takafumi Aizawa, Hiroshi Nanjo, Yutaka Ikushima

    研究成果: Article査読

    1 被引用数 (Scopus)

    抄録

    129Xe NMR spectroscopy is applied to investigate the physical properties of Xe confined in porous glasses up to the supercritical region. The chemical shift of confined Xe is larger than that of bulk Xe, which is approximately proportional to density, and the upward deviation is more enhanced for smaller pore. The deviation is large in the gas phase, and has a maximum far below the critical density, while it gradually decreases and approaches zero in the liquid phase. Below the critical density the both of the size and surface effects are observed, while the surface effect becomes minor and the size effect persists above the critical density. The chemical shift at the dilute limit depends on the surface properties of the matrix, as well as the pore size.

    本文言語English
    ページ(範囲)338-340
    ページ数3
    ジャーナルe-Journal of Surface Science and Nanotechnology
    3
    DOI
    出版ステータスPublished - 2005 11 27

    ASJC Scopus subject areas

    • Biotechnology
    • Bioengineering
    • Condensed Matter Physics
    • Mechanics of Materials
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films

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