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首页> 外文期刊>Applied optics >Crystallography of ordered colloids using optical microscopy. 2. Divergent-beam technique
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Crystallography of ordered colloids using optical microscopy. 2. Divergent-beam technique

机译：使用光学显微镜对有序胶体进行晶体学分析。 2.发散束技术

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A technique has been developed to extract quantitative crystallographic data from randomly oriented colloidal crystals using a divergent-beam approach. This technique was tested on a series of diverse experimental images of colloidal crystals formed from monodisperse suspensions of sterically stabilized poly-(methyl methacrylate) spheres suspended in organic index-matching solvents. Complete sets of reciprocal lattice basis vectors were extracted in all but one case. When data extraction was successful, result 3 appeared to be accurate to about 1% for lattice parameters and to within (similar to)2 degrees for orientation. This approach is easier to implement than a previously developed parallel-beam approach with the drawback that the divergent-beam approach is not as robust in certain situations with random hexagonal close-packed crystals. The two techniques are therefore complimentary to each other, and between them it should be possible to extract quantitative crystallographic data with a conventional optical microscope from any closely index-matched colloidal crystal whose lattice parameters are compatible with visible wavelengths. (c) 2008 Optical Society of America.
机译：已经开发出一种使用发散束方法从随机取向的胶体晶体中提取定量晶体学数据的技术。该技术在一系列胶态晶体的实验图像上进行了测试，这些胶态晶体是由悬浮在有机指数匹配溶剂中的空间稳定化聚甲基丙烯酸甲酯球体的单分散悬浮液形成的。除一种情况外，都提取了完整的倒易方阵基向量。当数据提取成功时，结果3对于晶格参数似乎准确到大约1％，对于方向精确到（大约）2度。这种方法比以前开发的平行光束方法更容易实现，但缺点是发散光束方法在某些情况下对于六方密堆积晶体是不那么稳健的。因此，这两种技术是互为补充的，并且在它们之间，应该有可能使用常规的光学显微镜从晶格参数与可见波长兼容的任何折射率紧密匹配的胶体晶体中提取定量的晶体学数据。 （c）2008年美国眼镜学会。

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