Fast ion transport in nanoscaled thin film cerium oxide

Sathya Swaroop, Martin Kilo, Anna Eden Kossoy, Igor Lubomirsky, Ilan Riess

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Dense CeO2 layers of 350 nm thickness, with columnar grains of size 25 nm, were RF-sputtered on silicon. 18O isotope exchange in the temperature range from 200 to 575 °C showed surface exchange at CeO2 as the rate-determining step, while diffusion through the polycrystalline thin layer was fast. The surface exchange coefficients controlled by surface or grain boundary processes were found to be ks = 2.7 × 10- 8 exp (frac(- 0.3 eV, k T)) cm s- 1 or kgb = 1 × 10- 9 exp (frac(- 0.3 eV, k T)) cm s- 1. Comparison with literature data on doped ceria revealed that surface exchange could be dominated by grain boundary processes. A lower limit for the diffusion coefficient was determined as 10- 15 cm2 s- 1 at 575 °C.

Original languageEnglish
Pages (from-to)1205-1208
Number of pages4
JournalSolid State Ionics
Volume179
Issue number21-26
DOIs
Publication statusPublished - Sep 15 2008

Fingerprint

cerium oxides
Cerium
Ions
Thin films
Oxides
thin films
ions
Grain boundaries
grain boundaries
Cerium compounds
Silicon
Isotopes
diffusion coefficient
isotopes
ceric oxide
silicon
coefficients
Temperature
temperature

Keywords

  • Ceria
  • Nanocrystals
  • Oxygen surface exchange
  • SIMS
  • Thin film

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Fast ion transport in nanoscaled thin film cerium oxide. / Swaroop, Sathya; Kilo, Martin; Kossoy, Anna Eden; Lubomirsky, Igor; Riess, Ilan.

In: Solid State Ionics, Vol. 179, No. 21-26, 15.09.2008, p. 1205-1208.

Research output: Contribution to journalArticle

Swaroop, S, Kilo, M, Kossoy, AE, Lubomirsky, I & Riess, I 2008, 'Fast ion transport in nanoscaled thin film cerium oxide', Solid State Ionics, vol. 179, no. 21-26, pp. 1205-1208. https://doi.org/10.1016/j.ssi.2007.12.006
Swaroop, Sathya ; Kilo, Martin ; Kossoy, Anna Eden ; Lubomirsky, Igor ; Riess, Ilan. / Fast ion transport in nanoscaled thin film cerium oxide. In: Solid State Ionics. 2008 ; Vol. 179, No. 21-26. pp. 1205-1208.
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