Mechanochromic fluorophores and elastomers gain great potential in dynamic data encryption and anti-counterfeiting due to their instant responses, excellent handleability, high-throughput data-verification, and multi-dimensional security features. However, the reported mechanochromic fluorophores generally require solvent fuming or thermal annealing to revert their responses, sacrificing the handleability and lengthening the authentication time. For the mechanochromic elastomers, the data input requires precisely control the dose of the crosslinkers or phase tuning agents, making the high-throughput data-processing rather challenging. Here we developed a mechanically gated data display by synergizing the mechanochromism of chiral photonic elastomers and optically responsive molecules. Specifically, the reflectance or emission of the dyes/fluorophores could be selectively reflected or transmitted by the elastomers with desired photonic bandgaps, leading to data displays of given color/fluorescence. Mechanically stretching the elastomers can readily tuning their photonic bandgaps over a wide range, thereby notably alternating the corresponding reflection and emission wavelength, and the outcome of displayed data. Relaxing the elastomers rapidly restores the initial data. Moreover, the displayed data varies notably under L- and R-circular polarizer filter, respectively, offering good programmability and multi-dimensional security features. This work represents a unique data protection approach and enables properties unattainable by conventional mechanochromic fluorophores and elastomers.

中文翻译：

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通过协同手性光子弹性体和光学响应分子的机械变色性进行机械门控数据显示

力致变色荧光团和弹性体由于其即时响应、优异的可操作性、高通量数据验证和多维安全特性，在动态数据加密和防伪方面具有巨大潜力。然而，所报道的机械变色荧光团通常需要溶剂熏蒸或热退火来恢复其响应，从而牺牲了可操作性并延长了认证时间。对于力致变色弹性体，数据输入需要精确控制交联剂或相调节剂的剂量，使得高通量数据处理相当具有挑战性。在这里，我们通过协同手性光子弹性体和光学响应分子的机械变色性开发了一种机械门控数据显示。具体来说，染料/荧光团的反射或发射可以由具有所需光子带隙的弹性体选择性地反射或透射，从而导致给定颜色/荧光的数据显示。机械拉伸弹性体可以很容易地在很宽的范围内调整它们的光子带隙，从而显着地改变相应的反射和发射波长以及显示数据的结果。松弛弹性体可快速恢复初始数据。此外，显示的数据分别在左旋和右旋圆偏振镜滤光片下变化显着，提供了良好的可编程性和多维安全特性。这项工作代表了一种独特的数据保护方法，并实现了传统机械致变色荧光团和弹性体无法实现的特性。