Crystallite size dependency of thermal expansion in ceria nanoparticles

Philip P. Rodenbough, Mikhail Lipatov, Siu Wai Chan

Research output: Contribution to journalArticlepeer-review

Abstract

We have carefully measured the thermal expansion for ceria nanoparticles across a wide range of crystallite sizes. Such an experiment probing the crystallite size dependency of thermal expansion has virtually no precedence. We found that as crystallite size decreases, the coefficient of thermal expansion decreases as well. We are able to calculate from the expansions the relative contributions of surface adsorbents and surface non-stoichiometry to surface stress. We find that smaller nanoparticles owe more of their surface stress to surface non-stoichiometry.

Original languageEnglish (US)
Pages (from-to)311-316
Number of pages6
JournalMaterials Chemistry and Physics
Volume192
DOIs
StatePublished - May 1 2017

Keywords

  • Ceria
  • Lattice parameter
  • Nanoparticles
  • Thermal expansion

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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