Surface ligand assisted valence change in ceria nanocrystals

J. Zhang, T. Naka, S. Ohara, K. Kaneko, T. Trevethan, A. Shluger, T. Adschiri

    研究成果: Contribution to journalArticle査読

    26 被引用数 (Scopus)

    抄録

    In this report, we used x-ray absorption, electron energy-loss, and magnetic analyses to demonstrate the effect of modification of ceria (CeO 2-δ) nanocrystals with a particle size D= 3.5-14 nm by oleic acid surface ligands. We observe a shift of the electronic state of the cerium ions from tetra to trivalent state as the surface density of the ligand molecules is increased. The valence state of cerium in the nanocrystal is strongly correlated with the number of ligand molecules bound to the surface of the ceria nanocrystals. One oxygen vacancy is stabilized by 5-6 ligand molecules bound on a CeO2-δ nanocrystal.

    本文言語英語
    論文番号045411
    ジャーナルPhysical Review B - Condensed Matter and Materials Physics
    84
    4
    DOI
    出版ステータス出版済み - 7 6 2011

    All Science Journal Classification (ASJC) codes

    • 電子材料、光学材料、および磁性材料
    • 凝縮系物理学

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