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arXiv · 1105.5760

Glass transitions in two-dimensional suspensions of colloidal ellipsoids

Zhongyu Zheng·Feng Wang·Yilong Han
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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 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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Zhongyu Zheng, Feng Wang, Yilong Han. 2011-05-29. Glass transitions in two-dimensional suspensions of colloidal ellipsoids. https://doi.org/10.1103/physrevlett.107.065702

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