Reported herein is the novel achievement of uniform and tunable interference colors of nanocomposite films containing organized cellulose nanocrystals (CNCs) from dynamic hydrogel precursors. Homogeneous and amendable interference colors with broad range are obtained either by stacking the nanocomposite films to adjust the amount of CNCs in the propagation pathway of light or by regulating the rotation angles between the individual films to alter the relative organization of CNCs within the system. Moreover, the precise and controllable patterned CNC composite films with multicolors in one film are facilely fabricated for the first time from the patterned hydrogel precursors. Based on this stacking/rotation‐method, these patterned nanocomposite films with tunable interference colors can be further applied as fundamental elements for optical encryption by establishing a ternary‐coded decimal system with encoded decimal numerals, paving the way for the development of photonic functional materials based on CNCs.

中文翻译：

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具有可调节物理结构的纤维素纳米晶体用于光子加密的模块化纳米复合薄膜

本文报道的是纳米复合薄膜均匀且可调的干涉色的新成果，该薄膜包含来自动态水凝胶前体的有组织的纤维素纳米晶体（CNC）。通过堆叠纳米复合膜以调节光的传播路径中的CNC数量，或通过调节各个膜之间的旋转角度以改变系统内CNC的相对组织，可以获得宽范围的均匀且可修改的干涉色。而且，首次从图案化的水凝胶前体容易地制造出精确且可控的在一个膜中具有多色的图案化的CNC复合膜。根据此堆叠/旋转方法，