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Materials 2014, 7(5), 3494-3511; doi:10.3390/ma7053494
Article

The Design and Investigation of Nanocomposites Containing Dimeric Nematogens and Liquid Crystal Gold Nanoparticles with Plasmonic Properties Showing a Nematic-Nematic Phase Transition (Nu-Nx/Ntb)

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Department of Chemistry, University of Hull, Hull, HU6 7RX, UK
* Author to whom correspondence should be addressed.
Received: 12 March 2014 / Revised: 11 April 2014 / Accepted: 17 April 2014 / Published: 30 April 2014
(This article belongs to the Special Issue Liquid Crystals)
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Abstract

The construction of liquid crystal compositions consisting of the dimeric liquid crystal, CB_C9_CB (cyanobiphenyl dimer = 1'',9''-bis(4-cyanobiphenyl-4'-yl)nonane), and the range of nematic systems is explored. The materials include a laterally functionalized monomer, which was used to construct a phase diagram with CB_C9_CB, as well as one laterally linked dimer liquid crystal material and two liquid crystal gold nanoparticle (LC-Au-NPs) systems. For the Au-NP-LCs, the NP diameters were varied between ~3.3 nm and 10 nm. Stable mixtures that exhibit a nematic-nematic phase transition are reported and were investigated by POM (polarizing optical microscopy), DSC (differential scanning calorimetry) and X-ray diffraction studies.
Keywords: nanocomposite; liquid crystal; nematic-nematic; phase diagram; dimer; siloxane; mixtures; nanoparticles; plasmonic; gold nanocomposite; liquid crystal; nematic-nematic; phase diagram; dimer; siloxane; mixtures; nanoparticles; plasmonic; gold
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Tamba, M.-G.; Yu, C.H.; Tang, B.J.; Welch, C.; Kohlmeier, A.; Schubert, C.P.; Mehl, G.H. The Design and Investigation of Nanocomposites Containing Dimeric Nematogens and Liquid Crystal Gold Nanoparticles with Plasmonic Properties Showing a Nematic-Nematic Phase Transition (Nu-Nx/Ntb). Materials 2014, 7, 3494-3511.

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