ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Measurements of growing surface tension of amorphous-amorphous interfaces on approaching the colloidal glass transition

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 .

[img]
Preview
PDF
Nat_Com_9_2018.pdf - Published Version

Download (1MB) | Preview
Official URL: http://dx.doi.org/10.1038/s41467-018-02836-6

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
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
Depositing User: Id for Latest eprints
Date Deposited: 02 Mar 2018 15:03
Last Modified: 02 Mar 2018 15:03
URI: http://eprints.iisc.ac.in/id/eprint/58949

Actions (login required)

View Item View Item