Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia

S. Azad, O. A. Marina, C. M. Wang, L. Saraf, V. Shutthanandan, D. E. McCready, A. El-Azab, J. E. Jaffe, M. H. Engelhard, C. H F Peden, S. Thevuthasan

Research output: Contribution to journalArticle

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Abstract

Layer-by-layer structures of gadolinia-doped ceria and zirconia have been synthesized on Al2 O3 (0001) using oxygen plasma-assisted molecular beam epitaxy. Oxygen ion conductivity greatly increased with an increasing number of layers compared to bulk polycrystalline yttria-stabilized zirconia and gadolinia-doped ceria electrolytes. The conductivity enhancement in this layered electrolyte is interesting, yet the exact cause for the enhancement remains unknown. For example, the space charge effects that are responsible for analogous conductivity increases in undoped layered halides are suppressed by the much shorter Debye screening length in layered oxides. Therefore, it appears that a combination of lattice strain and extended defects due to lattice mismatch between the heterogeneous structures may contribute to the enhancement of oxygen ionic conductivity in this layered oxide system.

Original languageEnglish
Article number131906
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number13
DOIs
Publication statusPublished - 28 Mar 2005
Externally publishedYes

Fingerprint

gadolinium
zirconium oxides
conductivity
augmentation
electrolytes
ions
oxides
oxygen plasma
oxygen ions
yttria-stabilized zirconia
ion currents
halides
space charge
molecular beam epitaxy
screening
causes
defects
oxygen

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Azad, S., Marina, O. A., Wang, C. M., Saraf, L., Shutthanandan, V., McCready, D. E., ... Thevuthasan, S. (2005). Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia. Applied Physics Letters, 86(13), 1-3. [131906]. https://doi.org/10.1063/1.1894615

Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia. / Azad, S.; Marina, O. A.; Wang, C. M.; Saraf, L.; Shutthanandan, V.; McCready, D. E.; El-Azab, A.; Jaffe, J. E.; Engelhard, M. H.; Peden, C. H F; Thevuthasan, S.

In: Applied Physics Letters, Vol. 86, No. 13, 131906, 28.03.2005, p. 1-3.

Research output: Contribution to journalArticle

Azad, S, Marina, OA, Wang, CM, Saraf, L, Shutthanandan, V, McCready, DE, El-Azab, A, Jaffe, JE, Engelhard, MH, Peden, CHF & Thevuthasan, S 2005, 'Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia', Applied Physics Letters, vol. 86, no. 13, 131906, pp. 1-3. https://doi.org/10.1063/1.1894615
Azad S, Marina OA, Wang CM, Saraf L, Shutthanandan V, McCready DE et al. Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia. Applied Physics Letters. 2005 Mar 28;86(13):1-3. 131906. https://doi.org/10.1063/1.1894615
Azad, S. ; Marina, O. A. ; Wang, C. M. ; Saraf, L. ; Shutthanandan, V. ; McCready, D. E. ; El-Azab, A. ; Jaffe, J. E. ; Engelhard, M. H. ; Peden, C. H F ; Thevuthasan, S. / Nanoscale effects on ion conductance of layer-by-layer structures of gadolinia-doped ceria and zirconia. In: Applied Physics Letters. 2005 ; Vol. 86, No. 13. pp. 1-3.
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AU - McCready, D. E.

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