Synthesis, Morphology Control and Deposition of CeO2 Nanocrystals Toward Thin Film

Abstract

Cerium dioxide (CeO2, ceria) is one of the most important materials toward electrolyte materials of solid oxide fuel cells. Since physicochemical and electrical properties of CeO2 vary with the particle dimension, morphology control of CeO2 on nanometer scale has been the key subject to realize the optimal properties for each application. Fabrication of CeO2 nanocrystals with remarkable morphologies such as nano-cubes is the first step in development of nanometer-scaled SOFC. In this study, CeO2 nanocrystals of around 5 nm in diameter were prepared by a hydrothermal route using potassium oleate as a stabilizing agent in the same manner as described in the previous papers. And then, nanocrystals were dispersed on crystal substrate toward thin film device.