Stimulus-responsive materials with designable integrated functions bridge the intelligent systems in future lifestyles with the Internet of Things (IoT). The growing trend for IoT and corresponding advanced devices will involve a great number of electronic disposables, which may place heavy burdens on the environment. Here, an elaborately designed multistage responsive material is reported for real-time, reversible light-writing based on organized stage-by-stage responsive behaviors and polarity-dependent physicochemical fluorescence response, where the stimulus is accurately delivered through a completely reversible “light-heat-fluorescence” pathway. The resulted materials can be pollution-freely written by hand-controlled near-infrared laser within 5 s, spontaneously erased within 20 s, and exhibit excellent re-writing ability (more than 5000 times while the variance of chromaticity coordinates <0.0008), which is difficult to achieve by traditional laser writing technologies. This study is a step toward high-performance long-life functional devices based on reversible multistage responsive materials for future IoT lifestyles.

中文翻译：

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用于实时、可逆和可持续写光的多级响应材料

具有可设计集成功能的刺激响应材料将未来生活方式中的智能系统与物联网 (IoT) 连接起来。物联网和相应先进设备的增长趋势将涉及大量电子一次性用品，这可能会给环境带来沉重负担。在这里，报道了一种精心设计的多级响应材料，用于基于有组织的逐级响应行为和极性依赖性物理化学荧光响应的实时、可逆光写入，其中刺激通过完全可逆的“光-热-荧光”途径。所得材料可通过手控近红外激光在5秒内无污染写入，20秒内自发擦除，并表现出优异的重写能力（超过5000次，而色度坐标方差<0.0008），这是传统激光写入技术难以实现的。这项研究是面向未来物联网生活方式的基于可逆多级响应材料的高性能长寿命功能设备迈出的一步。