Glass transitions in two-dimensional suspensions of colloidal ellipsoids

Details Glass transitions in two-dimensional suspensions of colloidal ellipsoids Glass transitions in two-dimensional suspensions of colloidal ellipsoids

2011-05-29

arxiv.org/abs/1105.5760v1

Physics

Condensed Matter

Soft Condensed Matter

Scientific paper

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 approaching the glass transitions. The clusters of translational and rotational fastest-moving ellipsoids formed mainly within pseudo-nematic domains, and around the domain boundaries, respectively.

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