发光
材料科学
纳米晶
聚合物
光子学
智能材料
光电子学
纳米技术
复合材料
作者
Mingcong Xu,Xu Zhen,Miguel A. Soto,Yi‐Tao Xu,Wadood Y. Hamad,Mark J. MacLachlan
标识
DOI:10.1002/adma.202301060
摘要
Abstract Stimulus‐responsive materials that display circularly polarized luminescence (CPL) have attracted great attention for application in chiral sensors and smart displays. However, due to difficulties in the regulation of chiral structures, fine control of CPL remains a challenge. Here, it is demonstrated that cellulose nanocrystal shape‐memory polymers (CNC‐SMPs) with luminescent components enable mechanically responsive CPL. The chiral nematic organization of CNCs in the material gives rise to a photonic bandgap. By manipulating the photonic bandgap or luminescence wavelengths of the luminescent CNC‐SMPs, precise control of CPL emission with varied wavelengths and high dissymmetry factors ( g lum ) is achieved. Specifically, CPL emission can be switched reversibly by treating the luminescent CNC‐SMPs with hot‐pressing and recovery by heating. Pressure‐responsive CPL with tunable g lum values is ascribed to the pressure‐responsive photonic bandgaps. Moreover, colorimetric and CPL‐active patterns are created by imprinting desired forms into SMP samples. This study demonstrates a novel way to fabricate smart CPL systems using biomaterials.
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