Broadband reflection in polymer-stabilized cholesteric liquid crystals<i>via</i>spin-coating MoO<sub>2</sub>nanoparticles

Miao, Zongcheng; Li, Chaonian; Lang, Tingting; Li, Jinqian; Guo, Zhun; Yao, Ruijuan; Gao, Jianjing; Zhao, Yang; Wang, Dong

doi:10.1039/d2nj05001c

Cited by 5 publications

(1 citation statement)

References 33 publications

(42 reference statements)

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“…The ATO nanoparticles also reduced the threshold voltage and optimized the response performance of PSLC. Wang et al prepared near-infrared broadband reflective polymerstabilized cholesteric liquid crystal (PSCLC) films by spin-coating with MoO 2 [29]. The reflective broadband of the PSCLC films broadened from 261 nm to 401 nm.…”

Section: Introductionmentioning

confidence: 99%

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Zhao,

Liu,

Cao

et al. 2023

Materials

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We prepared cholesteric liquid crystal (CLC) films with broadband reflective properties by admixing organic dye UV-327 into inorganic zinc oxide nanoparticles (ZnO NPs), utilizing the principle of pitch distribution from a large to a small gradient along the film thickness direction, leading to broadband reflection. ZnO NPs are poorly dispersed and easy to gather, but they do not decompose easily. The addition of UV-327 makes up for the above shortcomings. UV-327 is an organic compound with good compatibility and dispersion with liquid crystal systems. Therefore, we used the method of mixing two UV-absorbing dyes (UV-327 and ZnO NPs) to obtain CLC films. UV-absorbing dyes (UV-327 and ZnO NPs) made the liquid crystal films form a UV intensity gradient in the direction of thickness, prompting the polymerizable monomers to polymerize faster on the stronger side of the light, leading to the relative diffusion of chiral molecules and polymerizable monomers, forming the concentration gradient of chiral molecules in the direction of thickness. The pitch has a gradient distribution as the chiral concentration varies. Then, anchored by the polymer network, the pitch gradient distribution no longer changes. Broadened reflective bandwidth can reach up to 881 nm. Furthermore, the film covers the near-infrared wavelength band well, which can be applied to future smart windows or laser shielding for medical and military applications. It is also believed that this achievement will optimize the preparation technology of broadband reflective CLC films in the future.

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Section: Introductionmentioning

confidence: 99%

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Zhao,

Liu,

Cao

et al. 2023

Materials

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Preparation and application of broadband reflective polymer-stabilised cholesteric liquid with nanoscale fibres

Lin,

Zhao,

Gao

et al. 2023

Liquid Crystals

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Real-time visual humidity response films of interpenetrating polymer network based on cholesteric liquid crystal and poly (acrylic acid)

Cao,

Zhao,

Wang

et al. 2023

Liquid Crystals

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Broadband reflection in polymer-stabilized cholesteric liquid crystalsviaspin-coating MoO₂nanoparticles

Abstract: The SEM image of the polymer network of samples e1–e5: (e1) 4.8% C6M; (e2) 6.8% C6M; (e3) 8.8% C6M; (e4) 10.8% C6M; (e5) 12.8% C6M; and (e4′) cross-sectional image of e4.

Cited by 5 publications

References 33 publications

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Preparation and application of broadband reflective polymer-stabilised cholesteric liquid with nanoscale fibres

Real-time visual humidity response films of interpenetrating polymer network based on cholesteric liquid crystal and poly (acrylic acid)

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Broadband reflection in polymer-stabilized cholesteric liquid crystalsviaspin-coating MoO2nanoparticles

Abstract: The SEM image of the polymer network of samples e1–e5: (e1) 4.8% C6M; (e2) 6.8% C6M; (e3) 8.8% C6M; (e4) 10.8% C6M; (e5) 12.8% C6M; and (e4′) cross-sectional image of e4.

Cited by 5 publications

References 33 publications

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Near-Infrared Reflective Polymer Films Based on UV-327-Doped Zinc Oxide Nanoparticles

Preparation and application of broadband reflective polymer-stabilised cholesteric liquid with nanoscale fibres

Real-time visual humidity response films of interpenetrating polymer network based on cholesteric liquid crystal and poly (acrylic acid)

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Broadband reflection in polymer-stabilized cholesteric liquid crystalsviaspin-coating MoO₂nanoparticles