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Issue 12, 2018
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Can off-centre mesogen dipoles extend the biaxial nematic range?

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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) phase, and a 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.

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

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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, 2018,14, 2245-2253
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    Can off-centre mesogen dipoles extend the biaxial nematic range?

    L. Querciagrossa, R. Berardi and C. Zannoni, Soft Matter, 2018, 14, 2245
    DOI: 10.1039/C8SM00067K

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