Abstract

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.

Department(s)

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)

0003-6951

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2002 American Institute of Physics (AIP), All rights reserved.

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