Influence of Gravity on Structure of Colloidal Crystal Using Simulated Microgravity  

作　　者：Lei Liu Jie Wang Sheng-hua Xu Zhi-wei Sun Jing-tong Wang 

机构地区：[1]. National Microgravity Laboratory, Institute of Mechanics, Chinese Academy of Sciences, BerlinE 100190, China [2]Department of Physics, Southern University and A&M College, Baton Rouge, LA 70813, USA

出　　处：《Chinese Journal of Chemical Physics》2009年第1期41-45,共5页化学物理学报（英文）

基　　金：ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China （No.20473108, No.10672173, and No.10432060） and the ＂Chuang-xin Project＂ of the Chinese Academy of Sciences.

摘　　要：Liquid mixtures of water and deuterium oxide as the liquid phase, were used to match the density of charged colloidal particles. Kossel diffraction method was used to detect the crystal structures. The experiments under the density-matched （g=0） and unmatched （g=1） conditions are compared to examine the influence of gravity on the crystal structures formed by self-assembly of 110 nm （in diameter） polystyrene microspheres. The result shows that the gravity tends to make the lattice constants of colloidal crystals smaller at lower positions, which indicates that the effect of gravity should be taken into account in the study of the colloidal crystals.

关 键 词：Colloidal crystal MICROGRAVITY Density-match Lattice constant 

分 类 号：O552.421[理学—热学与物质分子运动论]