Flexoelectric studies on mixtures of compounds made of rodlike and bent-core molecules

Kundu, Brindaban ; Roy, Arun ; Pratibha, R. ; Madhusudana, N. V. (2009) Flexoelectric studies on mixtures of compounds made of rodlike and bent-core molecules Applied Physics Letters, 95 (8). 081902_1-081902_3. ISSN 0003-6951

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Official URL: http://link.aip.org/link/?APPLAB/95/081902/1

Related URL: http://dx.doi.org/10.1063/1.3213544

Abstract

We report measurements of the temperature variations of the flexoelastic ratio (e1-e3)/K of octadecyl cyanobiphenyl and a mixture of this compound with another one with bent-core (BC) molecules, using hybrid aligned nematic cells. Addition of 5 mol% of the BC compound doubles the flexoelastic ratio, implying that the BC compound has ~ 20 times larger value compared to that of the compound with calamitic molecules. Mixtures with >11 mol% of the BC compound exhibit only a homeotropic alignment. We develop a simple model to account for this result which arises because of a large positive self-energy due to flexoelectric polarization.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Flexoelectricity; Mixtures; Organic Compounds
ID Code:76021
Deposited On:28 Dec 2011 13:23
Last Modified:28 Dec 2011 13:23

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