Multiple reentrant glass transitions in confined hard-sphere glasses

Suvendu Mandal, Simon Lang, Markus Gross, Martin Oettel, Dierk Raabe, Thomas Franosch and Fathollah Varnik ()
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Suvendu Mandal: Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstraße 150
Simon Lang: Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck
Markus Gross: Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstraße 150
Martin Oettel: Institut für Angewandte Physik, Eberhard Karls-Universität Tübingen, Auf der Morgenstelle 10
Dierk Raabe: Max-Planck-Institut für Eisenforschung
Thomas Franosch: Institut für Theoretische Physik, Leopold-Franzens-Universität Innsbruck
Fathollah Varnik: Interdisciplinary Centre for Advanced Materials Simulation (ICAMS), Ruhr-Universität Bochum, Universitätsstraße 150

Nature Communications, 2014, vol. 5, issue 1, 1-8

Abstract: Abstract Glass-forming liquids exhibit a rich phenomenology upon confinement. This is often related to the effects arising from wall–fluid interactions. Here we focus on the interesting limit where the separation of the confining walls becomes of the order of a few particle diameters. For a moderately polydisperse, densely packed hard-sphere fluid confined between two smooth hard walls, we show via event-driven molecular dynamics simulations the emergence of a multiple reentrant glass transition scenario upon a variation of the wall separation. Using thermodynamic relations, this reentrant phenomenon is shown to persist also under constant chemical potential. This allows straightforward experimental investigation and opens the way to a variety of applications in micro- and nanotechnology, where channel dimensions are comparable to the size of the contained particles. The results are in line with theoretical predictions obtained by a combination of density functional theory and the mode-coupling theory of the glass transition.

Date: 2014
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DOI: 10.1038/ncomms5435

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