Decoration of disclinations by solidification-induced band texture and focal-conic texture for a low-molar-mass liquid crystal  

作　　者：GU Qincui WU Changcheng CHEN Shouxi HUANG Yong 

机构地区：[1]State Key Laboratory of Polymer Physics and Chemistry,Center for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China [2]Laboratory of Cellulose and Lignocellulosics Chemistry,Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China

出　　处：《Chinese Science Bulletin》2002年第20期1711-1713,共3页

基　　金：The work was supported by the National Natural Science Foundation of China ( Grant No. 29925411).

摘　　要：Two decoration techniques, solidification-induced band texture decoration and focal-conic texture decoration, have been established to exhibit the director field of disclinations in a low-molar-mass methacrylate liquid crystal. The disclinations with strength s=1/2 and s=±1 are observed by the two decoration methods. For the solidification-induced band texture decoration, the molecular orientation is perpendicular to the direction of the band. While for focal-conic texture decoration, it has been proved by the results of IR dichroism that the direction of the director is parallel to the direction of the focal-conic. Therefore, the sketch map of the molecular director filed can be mapped according to the morphological pattern of the solidification-induced band texture or focal-conic texture.Two decoration techniques, solidificationinduced band texture decoration and focal-conic texture decoration, have been established to exhibit the director field of disclinations in a low-molar-mass methacrylate liquid crystal. The disclinations with strengths = 1÷2 ands = ± 1 are observed by the two decoration methods. For the solidificationinduced band texture decoration, the molecular orientation is perpendicular to the direction of the band. While for focalconic texture decoration, it has been proved by the results of IR dichroism that the direction of the director is parallel to the direction of the focal-conic. Therefore, the sketch map of the molecular director filed can be mapped according to the morphological pattern of the solidificationinduced band texture or focal-conic texture.

关 键 词：DECORATION disclination solidification-induced band TEXTURE focal-conic TEXTURE liquid crystal. 

分 类 号：O753.2[理学—晶体学]