title: Glass transitions in quasi-two-dimensional suspensions of colloidal ellipsoids.
abstract: We observed a two-step glass transition in monolayers of colloidal ellipsoids by video microscopy. The glass transition in the rotational degree of freedom was at a lower density than that in the translational degree of freedom. Between the two transitions, ellipsoids formed an orientational glass. Approaching the respective glass transitions, the rotational and translational fastest-moving particles in the supercooled liquid moved cooperatively and formed clusters with power-law size distributions. The mean cluster sizes diverge in power law as they approach the glass transitions. The clusters of translational and rotational fastest-moving ellipsoids formed mainly within pseudonematic domains and around the domain boundaries, respectively.
authors: Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors: Zhongyu
authors: Z
authors: Zheng
authors: Feng
authors: F
authors: Wang
authors: Yilong
authors: Y
authors: Han