Liquid crystalline nanocolloids for the storage of electro-optic responsive images
Liquid crystalline nanocolloids for the storage of electro-optic responsive images
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用于存储电光响应图像的液晶纳米胶体
DOI：
10.1021/acsami.8b22636
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发表时间：
2019
影响因子：
9.5
通讯作者：
Wei Yen
中科院分区：
文献类型：
--
作者：
Peng Haiyan;Yu Lei;Chen Guannan;Xue Zhigang;Liao Yonggui;Zhu Jintao;Xie Xiaolin;Smalyukh Ivan I;Wei Yen
液晶纳米胶体（LCNCs）是一种由纳米颗粒（NPs）和液晶（LC）主体组成的纳米结构复合材料，由于其具有新的基本物理行为和功能特性而受到广泛关注。然而，由于LC主机中有限的NP负载，将LCNCs模式化为中尺度有序结构仍然是一个很大的挑战。在这里，我们通过与烷基和介源配体原位共功能化NP，证明了具有高NP负载（~ 42 wt %）的向列相LCNCs。通过全息光聚合诱导相分离，将LCNCs组装成有序结构，得到全息聚合物分散向列相纳米胶体（HPDNNC）。有趣的是，在HPDNNC中实现了高衍射效率、低光散射损耗和独特的电开关能力。此外，高质量的可切换和不可克隆的彩色图像被重建，有许多先进的应用前景（例如，防伪）。我们的发现为推进对纳米结构lc的基本理解及其在实现新型无机-有机复合材料方面的实际应用铺平了道路。
Liquid crystalline nanocolloids (LCNCs), which are nanostructured composites comprising nanoparticles (NPs) and a liquid crystal (LC) host, have attracted a great deal of attention because of their promising new fundamental physical behaviors and functional properties. Yet, it still remains a big challenge to pattern LCNCs into mesoscale-ordered structures due to the limited NP loading in the LC host. Here, we demonstrate LCNCs in the nematic phase with a high NP loading (∼42 wt %) by in situ co-functionalizing the NP with alkyl and mesogenic ligands. The LCNCs can be assembled into ordered structures through holographic photopolymerization-induced phase separation, giving rise to holographic polymer-dispersed nematic nanocolloids (HPDNNC). Interestingly, high diffraction efficiency, low light-scattering loss, and unique electric-switchable capability are realized in the HPDNNC. In addition, high-quality switchable and unclonable colored images are reconstructed, promising a host of advanced applications (e.g., anticounterfeiting). Our findings pave a way to advance the fundamental understanding of nanostructured LCs and their practical utility in enabling a new breed of inorganic–organic composite materials.