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Surface ligand assisted valence change in ceria nanocrystals

Zhang, J, Naka, T, Ohara, S, Kaneko, K, Trevethan, T, Shluger, A and Adschiri, T (2011) Surface ligand assisted valence change in ceria nanocrystals Physical Review B - Condensed Matter and Materials Physics, 84 (4).

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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. © 2011 American Physical Society.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Zhang, J
Naka, T
Ohara, S
Kaneko, K
Shluger, A
Adschiri, T
Date : 6 July 2011
DOI : 10.1103/PhysRevB.84.045411
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 12:35
Last Modified : 24 Jan 2020 22:30

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