Bulg. J. Phys. vol.39 no.1 (2012), pp. 092-099

Flexoelectro-Optical Behaviour of Layers Formed by Polymer-Liquid Crystal Phase-Separated Composites

Y.G. Marinov1, G.B. Hadjichristov1, S. Marino2, L. Todorova1, S. D'Elia2, C. Versace2, N. Scaramuzza2, A.G. Petrov1
1Institute of Solid State Physics, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
2Dipartimento di Fisica, UNICAL, 87036 Rende (CS), Italy
Abstract. The flexoelectro-optical behavior of layers formed by a liquid crystal (LC)-polymer phase-separated composite was investigated by flexoelectric spectroscopy. The composite layers with a thickness of 6 μm contain micrometer-sized droplets of LC E7 dispersed in a transparent polymer matrix. The layers were prepared between glass substrates with Teflon nanolayers initially deposited. Thus, LC-polymer composite layers with well ordered and aligned droplet morphology were obtained. The dispersed LC droplets were spherical in shape, with a mean size of about 14 μm. The flexoelectric response of LC droplets in this structure was studied as depending on both temperature and applied voltage.

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