Journal Article

FZJ-2016-07615

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Finite particle size drives defect-mediated domain structures in strongly confined colloidal liquid crystals

Gârlea, I. C. ; Mulder, P. ; Alvarado, J. ; Dammone, O. ; Aarts, D. G. A. L. ; Lettinga, M. P.FZJ* ; Koenderink, G. H. ; Mulder, B. M. (Corresponding author)

2016
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/13339  doi:10.1038/ncomms12112

Abstract: When liquid crystals are confined to finite volumes, the competition between the surface anchoring imposed by the boundaries and the intrinsic orientational symmetry-breaking of these materials gives rise to a host of intriguing phenomena involving topological defect structures. For synthetic molecular mesogens, like the ones used in liquid-crystal displays, these defect structures are independent of the size of the molecules and well described by continuum theories. In contrast, colloidal systems such as carbon nanotubes and biopolymers have micron-sized lengths, so continuum descriptions are expected to break down under strong confinement conditions. Here, we show, by a combination of computer simulations and experiments with virus particles in tailor-made disk- and annulus-shaped microchambers, that strong confinement of colloidal liquid crystals leads to novel defect-stabilized symmetrical domain structures. These finite-size effects point to a potential for designing optically active microstructures, exploiting the as yet unexplored regime of highly confined liquid crystals.

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Contributing Institute(s):

1. Weiche Materie (ICS-3)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)

Appears in the scientific report 2016

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