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Issue 24, 2018
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Stability of membrane-induced self-assemblies of spherical nanoparticles

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Abstract

The self-assembly of spherical nanoparticles, resulting from their adhesion on tensionless lipid membranes, is investigated through molecular dynamics simulations of a coarse-grained implicit-solvent model. Our simulations indicate that, with increasing adhesion strength, while reshaping the membrane, the nanoparticles aggregate into a sequence of self-assemblies corresponding to in-plane chains, two-row tubular (bitube) chains, annular (ring) chains, and single-row tubular (tube) chains. Annealing scans, with respect to adhesion strength, show that the transitions between the various phases are highly first-order with significant hystereses. Free energy calculations indicate that the gas and single-row tubular chains are stable over wide ranges of adhesion strength. In contrast, the in-plane chains are only stable for small aggregates of NPs, and the bitube and ring chains are long-lived metastable states over a wide range of adhesion strength.

Graphical abstract: Stability of membrane-induced self-assemblies of spherical nanoparticles

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Article information


Submitted
15 Mar 2018
Accepted
23 May 2018
First published
24 May 2018

Soft Matter, 2018,14, 5019-5030
Article type
Paper

Stability of membrane-induced self-assemblies of spherical nanoparticles

E. J. Spangler, P. B. S. Kumar and M. Laradji, Soft Matter, 2018, 14, 5019
DOI: 10.1039/C8SM00537K

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