Direct Observation of Grain Rotation-Induced Grain Coalescence in Two-Dimensional Colloidal Crystals
Direct Observation of Grain Rotation-Induced Grain Coalescence in Two-Dimensional Colloidal Crystals
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DOI：
10.1021/nl102786k
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发表时间：
2010-10-01
期刊：
影响因子：
10.8
通讯作者：
Ritchie, Grant A. D.
中科院分区：
文献类型：
--
作者：
Moore, Lee J.;Dear, Richard D.;Ritchie, Grant A. D.
空间调制激光用于产生多个局部热梯度在胶体样品放置在金表面我们使用光学显微镜观察实时动态生成的二维胶体晶体颗粒,发现一粒一粒rotation-induced聚结(GRIGC)发生旋转的谷物之前合并控制晶粒尺寸显示在晶界退火时间范围在我们的系统是在良好的协议纳米晶体生长的理论表达式
A spatially modulated laser is used to produce multiple localized thermal gradients in a colloidal sample placed above a gold surface We use an optical microscope to observe real time dynamics of the resulting two-dimensional colloidal crystal grains and find that grain rotation-induced grain coalescence (GRIGC) occurs with the rotation of both grains before coalescence Control over the grain size shows that the time scale for grain boundary annealing in our system is in good agreement with theoretical expressions formulated for nanocrystal growth