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Thin Solid Films, Vol.519, No.1, 1-4, 2010
Highly (100)-oriented CeO2 films prepared on amorphous substrates by laser chemical vapor deposition
CeO2 films were prepared on amorphous silica substrates by laser chemical vapor deposition using cerium dipivaloylmethanate precursor and a semiconductor InGaAlAs (808 nm in wavelength) laser system. The laser spot size was about 20 mm, which was sufficient to cover the whole substrate. Highly (100)-oriented CeO2 films were obtained at extraordinary high deposition rates ranging from 60 to 132 mu m/h. Films exhibited a columnar feather-like structure with a large number of nano-sized voids, and a surface morphology consisting of either nearly flat or pyramidal top-ending columns depending on the laser power. Nearly flat top-ending columns could be fairly (100)-oriented at the top and (111)-oriented laterally. (C) 2010 Published by Elsevier B.V.
Keywords:Laser chemical vapor deposition;Cerium oxide;Oriented films;Transmission electron microscopy;X-ray diffraction