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Amorphous materials

Glasses with liquid-like surfaces

The glass transition is a central concept in condensed matter physics, yet for ten years there has been an unresolved debate about what happens when the material thickness reaches nanoscale dimensions. New experiments probe below the surface.

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Figure 1: Snapshot of the surface of a glassy polymer at a temperature a little below its bulk glass temperature.

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Jones, R. Glasses with liquid-like surfaces. Nature Mater 2, 645–646 (2003). https://doi.org/10.1038/nmat986

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