Tunable reflectance of an inverse opal–chiral nematic liquid crystal multilayer device by electric- or thermal-control

作者: Yuxian Zhang , Weidong Zhao , Jiahui Wen , Jinming Li , Zhou Yang

DOI: 10.1039/C7CP01634D

关键词:

摘要: A new type of electric- or thermal-responsive multilayer device composed SiO2 bilayer inverse opal (IOP) and chiral nematic liquid crystals (N*LCs) was developed. Bilayer IOP fabricated by layer-by-layer assembly polystyrene (PS) spheres with two different sizes showed a reflectance in an extended range the near-infrared region. Furthermore, electrically thermally tunable bilayer-IOP-N*LC investigated. The exhibited photonic bandgap (PBG) N*LC-IOP composite structure application electric field (voltage-on), while it presented N*LCs without (voltage-off) electrically-responsive behaviour could be reversibly switched. Besides, gradient redshift as temperature increased below clearing point (TC) PBG when above TC.

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