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Real time observation of partial dislocations in thin colloidal crystals

Appl. Phys. Lett. 95, 174107 (2009); doi:10.1063/1.3253418

Published 29 October 2009

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Yi-Yong Luo, Shu-Xin Hu, Ying Lu, Zhen-Hong Mai, and Ming Li
Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
We use laser diffraction microscopy to visualize in real time the motion of partial dislocations in thin colloidal crystals confined in flat capillaries. The results show that the formation of partial dislocation loops with their associated stacking faults is an energetically preferred strain-relaxation channel for colloidal crystals. The local residual stress in the crystal can be estimated by measuring the velocity of the dislocations. Two types of interactions between the dislocations are observed, namely, that between two dislocations in two intersecting slide planes and that between two dislocations in two parallel slide planes. ©2009 American Institute of Physics
History: Received 21 April 2009; accepted 24 September 2009; published 29 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/174107/1
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0003-6951 (print)   1077-3118 (online)
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