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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