Improvement of response times in electrochromic switchable nematic emulsions

摘要

Electrochromic nematic emulsion can be obtained by fast cooling of isotropic mixtures of electrochromic mixture, nematic liquid crystal and monomers. Films obtained with this procedure show very low saturation fields but rather long relaxation times. In this paper we have doped nematic electrochromic emulsions with surfactant agents, in order to obtain a good compromise between low saturation fields and fast relaxation times. The decay time decreases in a significant way and the saturation field is slightly affected by the addition of small amounts of surfactant.