Phys. Rev. Lett. 84, 923 - 926 (2000)Shape Change as an Indicator of Mechanism in the High-Pressure Structural Transformations of CdSe Nanocrystals |
Juanita N. Wickham, Amy B. Herhold *, and A. P. Alivisatos
Department of Chemistry, University of California, Berkeley, California 94720
See Also: Erratum
Received 15 July 1999
X-ray diffraction was used to monitor the structure of 45 Å diameter CdSe nanocrystals as they transformed repeatedly between fourfold and sixfold coordinated crystal structures. Simulations of the diffraction patterns reveal that a shape change occurs as the crystals transform. They also show that stacking faults are generated in the transition from the high- to the low-pressure phase. The shape change and stacking fault generation place significant constraints on the possible microscopic mechanism of the phase transition.
©2000 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v84/p923
DOI: 10.1103/PhysRevLett.84.923
PACS: 62.50.+p, 61.46.+w, 64.70.Kb, 68.35.Rh
* Current address: Exxon Research and Engineering Company, Corporate Research Science Laboratory, Route 22 East, Annandale, NJ 08801
See Also
Erratum: Juanita N. Wickham, Amy B. Herhold, and A. P. Alivisatos, Erratum: Shape Change as an Indicator of Mechanism in the High-Pressure Structural Transformations of CdSe Nanocrystals [Phys. Rev. Lett. 84, 923 (2000)], Phys. Rev. Lett. 84, 4515 (2000)
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