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Abstract
We investigate the dependence of the relaxation time of the current flowing in a nematic cell submitted to an external dc voltage on the physical properties of the substrate. We show that previously presented analyses of the same problem are not very useful for practical applications. We compare our theoretical predictions with experimental data, and show that the agreement is rather good. The influence of the adsorption–desorption phenomenon on the relaxation time is also discussed.
Acknowledgements
We are in debted to FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo), CAPES (Fundação Coordenação Aperfeiçoamento de Pessoal de Nível Superior ‐ MEC) and CNPq (Instituto do Milênio de Fluidos Complexos ‐ IMFCx) for financial support.