Proton conductivity of columnar ceria thin-films grown by chemical vapor deposition
Abstract
Columnar thin films of undoped ceria were grown by metal–organic chemical vapor deposition. The films, deposited on Pt-coated MgO(100) substrates, display a columnar microstructure with nanometer scale grain size and ∼30% overall porosity. Through-plane (thickness mode) electrical conductivity was measured by AC