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Issue 19, 2017
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Tunable reflectance of an inverse opal–chiral nematic liquid crystal multilayer device by electric- or thermal-control

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Abstract

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

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

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Publication details

The article was received on 14 Mar 2017, accepted on 10 Apr 2017 and first published on 12 Apr 2017


Article type: Paper
DOI: 10.1039/C7CP01634D
Citation: Phys. Chem. Chem. Phys., 2017,19, 12425-12430
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    Tunable reflectance of an inverse opal–chiral nematic liquid crystal multilayer device by electric- or thermal-control

    Y. Zhang, W. Zhao, J. Wen, J. Li, Z. Yang, D. Wang, H. Cao and M. Quan, Phys. Chem. Chem. Phys., 2017, 19, 12425
    DOI: 10.1039/C7CP01634D

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