Nanometer (about 4~5nm) CeO2 single crystals were first synthesized by room-temperature homogeneous nucleation; the size was determined by electron microscopy and specific surfaced area of the particles. Modeling revealed that the surface energy of as-synthesized nanometer single crystals was in the range of 2.8-3.7J/m2. Crystal growth mechanisms change over the temperature regimes, from boundary diffusion over low-temperature regime (Eα=0.16eV) to bulk diffusion (Eα=0.50eV) over high-temperature region.
X. Zhou et al., "Room-Temperature Homogeneous Nucleation Synthesis and Thermal Stability of Nanometer Single Crystal CeO2," Applied Physics Letters, vol. 80, no. 20, pp. 3814-3816, American Institute of Physics (AIP), May 2002.
The definitive version is available at http://dx.doi.org/10.1063/1.1481244
Materials Science and Engineering
Keywords and Phrases
Boundary diffusion; Bulk diffusions; Crystal growth mechanism; High temperature; Homogeneous nucleation; Low-temperature regime; Room temperature; Temperature regimes; Nucleation; Surface chemistry; Thermodynamic stability; Single crystals
International Standard Serial Number (ISSN)
Article - Journal
© 2002 American Institute of Physics (AIP), All rights reserved.