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- Title
Cation exchange reactions in ionic nanocrystals.
- Authors
Son, Dong Hee; Hughes, Steven M; Yin, Yadong; Paul Alivisatos, A
- Abstract
Cation exchange has been investigated in a wide range of nanocrystals of varying composition, size, and shape. Complete and fully reversible exchange occurs, and the rates of the reactions are much faster than in bulk cation exchange processes. A critical size has been identified below which the shapes of complex nanocrystals evolve toward the equilibrium shape with lowest energy during the exchange reaction. Above the critical size, the anion sublattice remains intact and the basic shapes of the initial nanocrystals are retained throughout the cation exchange. The size-dependent shape change can also be used to infer features of the microscopic mechanism.
- Publication
Science (New York, N.Y.), 2004, Vol 306, Issue 5698, p1009
- ISSN
1095-9203
- Publication type
Journal Article
- DOI
10.1126/science.1103755