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Can off-centre mesogen dipoles extend the biaxial nematic range?

Abstract

We have investigated the possibility of extending the stability range of the biaxial nematic phase by adding an off–centre dipole of various strengths and orientations to elongated biaxial Gay–Berne (GB) mesogens yielding a relatively narrow biaxial nematic (Nbx), and smectic (Sbx) phase when dipole-less. The effect of dipoles is not easy to predict, and our previous investigations have shown the limited benefits of having a central dipole. Here we show, employing molecular dynamics (MD) simulations, that a not too strong off–centre dipole positioned along the longest axis of the nematogen can extend the temperature range of stability of the biaxial nematic phase, also shifting it towards lower temperatures.

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Publication details

The article was received on 09 Jan 2018, accepted on 07 Feb 2018 and first published on 07 Feb 2018


Article type: Paper
DOI: 10.1039/C8SM00067K
Citation: Soft Matter, 2018, Accepted Manuscript
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    Can off-centre mesogen dipoles extend the biaxial nematic range?

    L. Querciagrossa, R. Berardi and C. Zannoni, Soft Matter, 2018, Accepted Manuscript , DOI: 10.1039/C8SM00067K

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