Journal
LIQUID CRYSTALS
Volume 39, Issue 4, Pages 487-491Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/02678292.2012.656854
Keywords
cyclic voltammetric measurement; optically isotropic liquid crystal; residual transmittance
Funding
- Japan Science and Technology Agency
- Grants-in-Aid for Scientific Research [22107008, 21245037] Funding Source: KAKEN
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A relation between preparation conditions of polymer-stabilised optically isotropic liquid crystals and their electro-optical properties was investigated based on a cyclic voltammetric (CV) method. The polymer-stabilised optically isotropic liquid crystals were prepared by an in-situ photo-polymerisation of a precursor consisting of a chiral liquid crystalline mixture with monomers in an isotropic phase with a metal halide lamp. The CV response of the cell filled with the sample showed an asymmetric profile and a symmetric profile between the positive and negative applied voltages when the cell was irradiated with the metal halide lamp without filter and with a cut-off wavelength filter (> 390 nm), respectively. The CV response profile depends on a distributed state of the polymer generated in the cell. The residual birefringence of the polymer-stabilised optically isotropic phase was suppressed when the CV profile showed a symmetric profile.
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