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: Article査読

25 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English
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Published - 2011 7 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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