title: Shear moduli in bcc-fcc structure transition of colloidal crystals.
abstract: Shear moduli variation in the metastable-stable structure transition of charged colloidal crystals was investigated by the combination techniques of torsional resonance spectroscopy and reflection spectrometer. Modulus of the system increases with the proceeding of the transition process and it finally reaches the maximum value at the end of the transition. For colloidal crystals in stable state, the experimental moduli show good consistence with theoretical expectations. However, in the transition process, the moduli are much smaller than theoretical ones and this can be chalked up to crystalline imperfection in the transition state.
authors.affiliation: Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Shenghua
authors.initials: S
authors.lastname: Xu
authors.affiliation: Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Sun
authors.affiliation: Key Laboratory of Microgravity (National Microgravity Laboratory), Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Ruzeng
authors.initials: R
authors.lastname: Zhu