Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Ohio 45433-7750, USA.
Soft Matter. 2017 Sep 13;13(35):5842-5848. doi: 10.1039/c7sm01190c.
We report on electrically-induced, large magnitude (>300 nm), and reversible tuning of the selective reflection in polymer stabilized cholesteric liquid crystals (PSCLCs) prepared from negative dielectric anisotropy nematic liquid crystal hosts. The electrically-induced blue shift in the selective reflection of the PSCLCs is distinguished from our prior reports of bandwidth broadening and red-shifting tuning of the selective reflection in PSCLCs. The dominant factor in delineating the electro-optic response of the PSCLCs detailed here are the preparation conditions. Specifically, long exposure to UV intensity exceeding 250 mW cm. Other factors are shown to contribute to the response, including the type and concentration of photoinitiator.
我们报告了在由具有负介电各向异性的向列型液晶组成的聚合物稳定胆甾相液晶（PSCLC）中，电诱导的、大的（>300nm）且可逆的选择性反射调谐。与我们之前关于 PSCLC 中选择性反射的带宽展宽和红移调谐的报告不同，PSCLC 中选择性反射的电诱导蓝移是由制备条件决定的。具体来说，长时间暴露在超过 250mW/cm²的紫外强度下。其他因素也被证明对响应有贡献，包括光引发剂的类型和浓度。
