首页 | 本学科首页   官方微博 | 高级检索  
     检索      

带电胶体粒子结晶过程的实验研究
引用本文:刘蕾,徐升华,刘捷,段俐,孙祉伟,刘忍肖,董鹏.带电胶体粒子结晶过程的实验研究[J].物理学报,2006,55(11):6168-6174.
作者姓名:刘蕾  徐升华  刘捷  段俐  孙祉伟  刘忍肖  董鹏
作者单位:(1)石油大学(北京)重质油国家重点实验室,北京 102249; (2)中国科学院力学研究所国家微重力实验室,北京 100080
基金项目:国家自然科学基金;中国科学院知识创新工程项目
摘    要:利用带电单分散聚苯乙烯胶体粒子,通过自组装机理,制备了体积百分比为4.8%的具有多晶结构的胶体晶体,并用Kossel衍射技术和紫外可见分光光度计分别对晶体的生长过程进行了监测.通过对Kossel的图像分析检测不同阶段相应的晶格结构,发现胶体结晶过程晶体结构演变顺序为由液态—随机层结构—堆无序结构—面心立方孪晶结构到面心立方结构.定量地确定了结晶过程中晶体不同晶面的晶面间距和晶体的晶格常数,通过紫外可见分光光度计测量的晶体透射谱图,计算得到111晶面的晶面间距和晶体的晶格常数,与用Kossel衍射技术得到的结果相一致,还发现随样品放置时间的延长,衰减峰变窄和加深,并向短波方向移动,对应着晶体的晶格常数减小的现象. 关键词: 胶体晶体 自组织 Kossel环 聚苯乙烯粒子

关 键 词:胶体晶体  自组织  Kossel环  聚苯乙烯粒子
文章编号:1000-3290/2006/55(11)/6168-07
收稿时间:11 8 2005 12:00AM
修稿时间:2005-11-082006-04-28

Crystallization of charged colloidal particles: an experimental study
Liu Lei,Xu Sheng-Hua,Liu Jie,Duan Li,Sun Zhi-Wei,Liu Ren-Xiao,Dong Peng.Crystallization of charged colloidal particles: an experimental study[J].Acta Physica Sinica,2006,55(11):6168-6174.
Authors:Liu Lei  Xu Sheng-Hua  Liu Jie  Duan Li  Sun Zhi-Wei  Liu Ren-Xiao  Dong Peng
Institution:1. NML , lnstitute of Mechanics, Chinese Academy of Sciences , Beijing 100080; 2. State Key Laboratory of Heavy Oil Processing, University of Petroleum, Belting 102249, China
Abstract:Colloidal crystals are fabricated through a self-assembly process of monodispersed polystyrene particles. Evolution of colloidal crystal structures is analyzed by Kossel diffraction technique and UV-Vis spectrophotometer. According to the changes in the Kossel patterns we find the crystal structures change with passage of time and experience successively the following stages: liquid state-random layer structure-stacking disorder structure-fcc with (111) twin-normal fcc structure. The plane distances of different crystal planes and the lattice constants are also determined in this study. The 111 plane distances and the lattice constants evaluated according to the measurement of transmission spectrum are in accordance with the results by the analysis of Kossel line. In addition, it was found that the peaks of the transmission spectrum become sharper and shift considerably toward shorter wavelength during the crystal evolution, showing the lattice constants become smaller.
Keywords:colloidal crystal  self-assembly  Kossel line  polystyrene particles
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《物理学报》浏览原始摘要信息
点击此处可从《物理学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号