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Issue 39, 2015
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Molecular organization in freely suspended nano-thick 8CB smectic films. An atomistic simulation

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Abstract

We present an atomistic molecular dynamics simulation of freely suspended films of the smectic liquid crystal 8CB formed by nl = 2, 3,…,10, 20 theoretical monolayers, determining their orientational and positional order as a function of the film thickness. We find that films are always composed by bilayers of antiparallel molecules, and that in the case of odd nl, the system prefers to self-assemble in (nl + 1)/2 bilayers, with an increase of surface tension with respect to even nl samples. We also show that external layers have higher positional and orientational order, and that upon heating the disordering of the system proceeds from the inside, with the central layers progressively losing their smectic character, while the external ones are more resistant to temperature changes and keep the film from breaking.

Graphical abstract: Molecular organization in freely suspended nano-thick 8CB smectic films. An atomistic simulation

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Article information


Submitted
18 Jul 2015
Accepted
08 Sep 2015
First published
09 Sep 2015

Phys. Chem. Chem. Phys., 2015,17, 26149-26159
Article type
Paper
Author version available

Molecular organization in freely suspended nano-thick 8CB smectic films. An atomistic simulation

M. F. Palermo, L. Muccioli and C. Zannoni, Phys. Chem. Chem. Phys., 2015, 17, 26149
DOI: 10.1039/C5CP04213E

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