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- W2011818382 abstract "Dense, nanocrystalline gadolinia doped ceria (CGO) thin films were prepared by sputtering on a variety of substrates. The CGO films were electrochemically characterized with the aid of interdigitated Pt electrodes by impedance spectroscopy as a function of operating temperature (175–340 °C), CGO film thickness (157, 233, 315 nm), deposition temperature (room temperature, 300, 500 °C), and Pt electrode pattern geometry (line pattern spacing 10, 15, 25, 50, 100 μm). The different parameter variations enabled the identification of five contributions to the impedance spectra attributed, respectively, to wiring and contacts, grain, grain boundary, current constriction at the triple phase boundary, and electrode effects. The ionic conductivity of the CGO films were characterized by the expression σ = (A/T)exp(−EA/kT), with A = 108.66±0.72 S cm−1 K and EA = 0.97 ± 0.07 eV with magnitude higher than values reported for both bulk and thin film CGO previously reported in the literature. The electrochemical impedance of the Pt electrodes was found to decrease markedly for CGO films grown at reduced temperatures. Explanations for these observations are presented." @default.
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- W2011818382 date "2008-01-01" @default.
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- W2011818382 title "Fabrication and electrochemical characterization of planar Pt–CGO microstructures" @default.
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- W2011818382 doi "https://doi.org/10.1016/j.actamat.2007.09.006" @default.
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