Iridescent and luminescent composite films were fabricated through a coassembly strategy, in which glutathione-stabilized copper nanoclusters (GSH-CuNCs) were incorporated into chiral nematic structures of a cellulose nanocrystal (CNC) film. Through variations in the helical pitch, these composite films exhibited broadband reflection. The fluorescence emission spectrum of the composite film exhibited peaks at 439 and 600 nm, corresponding to crystallization-induced emission from CNCs and assembly-induced emission from CuNCs. The enhanced luminescence and prolonged lifetime of the composite film were attributed to the confinement effect of solid layers and attendant intermolecular interactions. By tuning the reaction time, temperature, and pH of the solution, the emission color and intensity of the CuNCs could be changed. At appropriate GSH and Cu²⁺ concentrations, the chiral organization of GSH-CuNCs enabled the composite CNC film to exhibit right-handed chiral fluorescence with an asymmetry factor of −0.16. Luminescent composite films were employed to fabricate LEDs with custom colors and patterns.

通过共组装策略制备了虹彩和发光复合膜，其中将谷胱甘肽稳定的铜纳米簇（GSH-CuNCs）掺入了纤维素纳米晶体（CNC）膜的手性向列结构中。通过改变螺距，这些复合膜表现出宽带反射。复合膜的荧光发射光谱在439和600 nm处出现峰值，对应于CNC诱导的结晶诱导发射和CuNC的组装诱导发射。复合膜的增强的发光和延长的寿命归因于固体层的限制作用和伴随的分子间相互作用。通过调节溶液的反应时间，温度和pH值，可以改变CuNCs的发射颜色和强度。在适当的谷胱甘肽和铜^在2+浓度下，GSH-CuNCs的手性组织使复合CNC膜显示出右旋手性荧光，不对称因子为-0.16。发光复合膜用于制造具有定制颜色和图案的LED。