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| Titel: |
Evidence for the flexo-electric effect in a nematic liquid crystal cell |
| Auteur: |
Barbero, G. Valabrega, P. Taverna Bartolino, R. Valenti, B. |
| Verschenen in: |
Liquid crystals |
| Paginering: | Jaargang 1 (1986) nr. 5 pagina's 483-490 |
| Jaar: |
1986-09-01 |
| Inhoud: |
We present evidence for the flexo-electric effect in a hybrid aligned nematic cell containing 4-methoxybenzylidene-4'-n-butylaniline (MBBA) subject to d.c. excitation, by comparing the theoretical curve derived by including the flexo-electric term in the free energy with the experimental points. The agreement appears to be very good for MBBA doped with a small amount of an additive which shows reversible electrochemical reactions at very low redox potential; this allows us to determine the sum of the flexo-electric coefficients and the anchoring energy on the planar wall. For undoped MBBA the experimental results can be justified only by assuming a low voltage screening of the electric field, due to the presence of ionic impurities in the material. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 9 gevonden artikelen
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