Journal
APPLIED PHYSICS LETTERS
Volume 83, Issue 8, Pages 1566-1568Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1605241
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The crystal growth process in colloidal nanocrystal systems is usually associated with the Ostwald-ripening mechanism. Here, we report on experimental evidence indicating that another crystal growth process took place in a colloidal nanocrystal system at room temperature. This crystal growth process is based on grain rotation among neighboring grains, resulting in a coherent grain-grain interface, which, by eliminating common boundaries, causes neighboring grains to coalesce, thereby forming a single larger nanocrystal. This phenomenon was observed in SnO2 nanocrystals (particle size ranging from 10 to 30 Angstrom). (C) 2003 American Institute of Physics.
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