Real time observation of partial dislocations in thin colloidal crystals

Real time observation of partial dislocations in thin colloidal crystals
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薄胶体晶体中部分位错的实时观察

DOI:
10.1063/1.3253418
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发表时间:
2009-10
影响因子:
4
通讯作者:
Li, Ming
Li, Ming
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Lu, Ying;Mai, Zhen-Hong;Luo, Yi-Yong;Hu, Shu-Xin;Li, Ming

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我们用激光衍射显微镜来观察真实的时间内在扁平毛细管中的薄胶体晶体中部分位错的运动。结果表明,部分位错环及其伴随的层错的形成是胶体晶体的一个能量优先的应变弛豫通道。晶体中的局部残余应力可以通过测量位错的速度来估计。观察到两种类型的位错之间的相互作用,即在两个相交的滑动面中的两个位错之间的相互作用和在两个平行的滑动面中的两个位错之间的相互作用。
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.
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