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向列型胶体自组装

Self-assembly of Nematic colloids
课程网址: http://videolectures.net/kolokviji_musevic_snk/  
主讲教师: Igor Muševič
开课单位: 约瑟夫·斯特凡学院
开课时间: 2007-02-25
课程语种: 英语
中文简介:
向列胶体是向列液晶中的微米粒子的分散体,其显示出自组装成规则几何图案的不寻常特性。这种行为的原因是颗粒之间的液晶压力。这些压力称为结构,是液晶取向和胶体颗粒附近晶体结构变形的结果。已知很长一段时间,向列胶体统一成一维链。我们也知道液晶和各向同性液体边界上的二维结构。最新研究表明,在理解向列胶体的自组装性质方面取得了进展;他们已经证明,向列胶体可以自发地形成非常紧密有界的规则二维结构。有了这些事实,为三维晶体中的胶体自组装奠定了新的道路。在自行排列纳米颗粒的材料制造中也存在有趣的可能性。
课程简介: Nematic colloids are dispersions of micrometric particles in nematic liquid crystals which show unusual properties of self-assembly into regular geometrical patterns. The reason for this type of behavior is the pressure of the liquid crystal among the particles. These pressures are called structures, and are the consequence of the orientation of the liquid crystals and the deformation of the structure of the crystal near the colloid particles. It has been known for quite a while that the nematic colloids are unifying into one dimensional chain. We also know about two dimensional structures on the border of liquid crystals and isotropic liquids. Latest research has shown progress in the understanding of the nature of self-assembly of nematic colloids; they have shown that nematic colloids can spontaneously make also regular two dimensional structures which are very tightly bounded. With these facts a new path has been laid for the self-assembly of colloids in 3 dimensional crystals. There are also interesting possibilities in the manufacturing of materials with the self arranging of nanoparticles.
关 键 词: 向列型胶体; 自组装; 微米颗粒的分散体; 结构; 二维结构
课程来源: 视频讲座网
最后编审: 2020-07-28:yumf
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