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Journal article

Releasing cation diffusion in self-limited nanocrystalline defective ceria thin films

In R S C Advances — 2017, Volume 7, Issue 23, pp. 13784-13788

By Esposito, Vincenzo1,2; Ni, D. W.3; Gualandris, Fabrizio1,4; Pryds, Nini1,5

From

Department of Energy Conversion and Storage, Technical University of Denmark1

Ceramic Engineering & Science, Department of Energy Conversion and Storage, Technical University of Denmark2

Chinese Academy of Sciences3

Imaging and Structural Analysis, Department of Energy Conversion and Storage, Technical University of Denmark4

Electrofunctional materials, Department of Energy Conversion and Storage, Technical University of Denmark5

Acceptor-doped nanocrystalline cerium oxide thin films are mechanically constrained nano-domains, with film/substrate interfacial strain and chemical doping deadlock mass diffusion. In contrast, in this paper we show that chemical elements result in highly unstable thin films under chemical reduction, with unexpected diffusion-driven effects such as fast migration of grain boundaries, porosity nucleation, and interdiffusion at low temperatures.

Language: English
Year: 2017
Pages: 13784-13788
ISSN: 20462069
Types: Journal article
DOI: 10.1039/C7RA01226H
ORCIDs: Esposito, Vincenzo and Pryds, Nini

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