Ganapathi, Divya and Nagamanasa, K Hima and Sood, A K and Ganapathy, Rajesh (2018) Measurements of growing surface tension of amorphous-amorphous interfaces on approaching the colloidal glass transition. In: NATURE COMMUNICATIONS, 9 .
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Abstract
There is mounting evidence indicating that relaxation dynamics in liquids approaching their glass transition not only become increasingly cooperative, but the relaxing regions also become more compact in shape. Of the many theories of the glass transition, only the random first-order theory-a thermodynamic framework-anticipates the surface tension of relaxing regions to play a role in deciding both their size and morphology. However, owing to the amorphous nature of the relaxing regions, even the identification of their interfaces has not been possible in experiments hitherto. Here, we devise a method to directly quantify the dynamics of amorphous-amorphous interfaces in bulk supercooled colloidal liquids. Our procedure also helped unveil a non-monotonic evolution in dynamical correlations with supercooling in bulk liquids. We measure the surface tension of the interfaces and show that it increases rapidly across the mode-coupling area fraction. Our experiments support a thermodynamic origin of the glass transition.
| Item Type: | Journal Article |
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| Publication: | NATURE COMMUNICATIONS |
| Additional Information: | Copy right for this article belong to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 02 Mar 2018 15:03 |
| Last Modified: | 02 Mar 2018 15:03 |
| URI: | http://eprints.iisc.ac.in/id/eprint/58949 |
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