Authors: V.N. Morris, R.A. Farrell, A.M. Sexton and M.A. Morris
Affilation: Analog Devices, Dimensional Solids Group, UCC, Ireland
Pages: 505 - 508
Keywords: ceria, lattice constant, citrate sol-gel, anion vacancies
High surface area ceria nanoparticles have been prepared using a citrate sol-gel precipitation method. Changes to the particle size have been made by calcining the ceria powders at different temperatures, and X-ray methods used to determine their lattice parameters. The particle sizes have been assessed using transmission electron microscopy (TEM) and the lattice parameter found to fall with decreasing particle size. The results are discussed in the light of the role played by surface tension effects.