Abstract
We study glass formation in hard spheres with short-range attraction. Thesystem consists of nearly-hard-sphere polymethylmethacrylate particles andnon-adsorbing random-coil polystyrene which induced a depletion attractionbetween the particles. The experiments reveal a re-entrant glass transitionand two qualitatively distinct glassy states. Dynamic light scattering,covering eleven orders of magnitude in time, gives insight into the kinds ofparticle motion responsible for these observations. The possible relevance ofour results to generic issues, such as the distinction between fragile andstrong glass formers, the nature of the underlying ‘free energy landscape’,and the relative importance of temperature and pressure, is discussed.
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