Macromolecular crowding in chiral assembly of ellipsoidal nanoparticles

Author:

Hou Jiaxin12ORCID,Sampson William12ORCID,Dumanli Ahu Gümrah12ORCID

Affiliation:

1. Department of Materials, The University of Manchester 1 , Oxford Rd., Manchester M13 9PL, United Kingdom

2. Henry Royce Institute, The University of Manchester 2 , Oxford Rd., Manchester M13 9PL, United Kingdom

Abstract

Anisotropic colloidal particles have the ability to self-assemble into cholesteric structures. We used molecular dynamics to simulate the self-assembly of ellipsoidal particles with the objective to establish a general framework to reveal the primary factors driving chiral interactions. To characterize these interactions, we introduce a characteristic parameter following the crowding factor (CF) theory. Our simulations and statistical analysis showed good agreement with the CF theory; at the early stages of the assembly process, the ellipsoidal particles go through a critical aggregation point followed by further clustering toward nematic order. Furthermore, we demonstrate that under high CF conditions, small initial clusters may induce a chiral twist, which subsequently forms a cholesteric structure with no directional preference in higher organization states.

Funder

Engineering and Physical Sciences Research Council

bp-ICAM International Centre for Advanced Materials

Publisher

AIP Publishing

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