Yang Dongpeng, Hu Yang, Ma Dekun, Ge Jianping, Huang Shaoming
School of Materials and Energy, Guangzhou Key Laboratory of Low-Dimensional Materials and Energy Storage Devices, Guangdong University of Technology, Guangzhou 510006, China.
Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
Research (Wash D C). 2022 Jul 19;2022:9838071. doi: 10.34133/2022/9838071. eCollection 2022.
Photonic crystal (PC) patterns have shown wide applications in optical devices, information encryption, anticounterfeiting, etc. Unfortunately, it is still a great challenge to reconfigure the PC patterns once fabricated. Herein, a new strategy is presented to reconfigure self-recordable PC patterns by printing local patterns into the chameleon-inspired PC papers using the phase change material (PCM) as ink and then erasing the patterns in ethanol. Multicolor and high-resolution (25 and 75 m for dot and lines, respectively) patterns can be efficiently and repeatedly reconfigured. In addition, the photonic patterns based on the PC paper and PCM combinations are gifted with mechanochromic characteristics and can show programmable and reversible color change under pressure. The high melting point of the ink, nonclosely packed structures of the PC paper, and the similar solubility parameter of PC paper, PCM, and ethanol are the keys for all these characteristics. This work offers a simple, flexible, efficient way to reconfigure PC patterns with mechanochromic properties and could open up exciting applications for novel hand-operation-based anticounterfeiting and optical devices.
光子晶体(PC)图案已在光学器件、信息加密、防伪等领域得到广泛应用。不幸的是,一旦制造完成,重新配置PC图案仍然是一个巨大的挑战。在此,我们提出了一种新策略,通过使用相变材料(PCM)作为墨水在受变色龙启发的PC纸上打印局部图案,然后在乙醇中擦除图案,来重新配置可自记录的PC图案。多色和高分辨率(点和线分别为25和75μm)图案可以高效且重复地重新配置。此外,基于PC纸和PCM组合的光子图案具有机械变色特性,并且在压力下可以显示可编程和可逆的颜色变化。墨水的高熔点、PC纸的非紧密堆积结构以及PC纸、PCM和乙醇相似的溶解度参数是所有这些特性的关键。这项工作提供了一种简单、灵活、高效的方法来重新配置具有机械变色特性的PC图案,并可能为新型基于手动操作的防伪和光学器件开辟令人兴奋的应用前景。