Issue 34, 2015

A minimal description of morphological hierarchy in two-dimensional aggregates

Abstract

A dimensionless parameter Λ is proposed to describe a hierarchy of morphologies in two-dimensional (2D) aggregates formed due to varying competition between short-range attraction and long-range repulsion. Structural transitions from finite non-compact to compact to percolated structures are observed in the configurations simulated by molecular dynamics at a constant temperature and density. Configurational randomness across the transition, measured by the two-body excess entropy S2, exhibits data collapse with the average potential energy [small epsilon, Greek, macron] of the systems. Independent master curves are presented among S2, the reduced second virial coefficient B2* and Λ, justifying this minimal description. This work lays out a coherent basis for the study of 2D aggregate morphologies relevant to diverse nano- and bio-processes.

Graphical abstract: A minimal description of morphological hierarchy in two-dimensional aggregates

Article information

Article type
Paper
Submitted
20 May 2015
Accepted
17 Jun 2015
First published
17 Jun 2015

Soft Matter, 2015,11, 6740-6746

Author version available

A minimal description of morphological hierarchy in two-dimensional aggregates

T. Das, T. Lookman and M. M. Bandi, Soft Matter, 2015, 11, 6740 DOI: 10.1039/C5SM01222H

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