Kai Zhao,Yunpeng Wang,Jingyu Guo,Shufen Zhang,Wenbin Niu
Flexible and stretchable electronics with mechanosensory functionality are highly desirable on account of their intriguing applications in smart wearable devices. Unfortunately, the susceptibility to structural damage and single electrical signal output restrict their further practical uses. Here, novel photonic vitrimer-based electronics (PVBEs) with self-healability and ultrastable visual-digital outputs are developed by harnessing vitrimer-induced structural evolutions of both photonic crystal (PC) and piezoresistive carbon textile. They demonstrate excellent strain sensing performances including synchronous electrical/optical response (0.25 s), high sensitivity (gauge factor, GF = 10.3), superior durability (>10000 cycles) and mechanochromism. Notably, dynamic covalent networks within vitrimer endow them self-healing ability of optical function, while the electromechanical performances are stably maintained benefiting from unique fully-embedded structure. Based on these merits, a new type of PVBE is demonstrated by incorporating wireless transmission system. Such a device can function as wirelessly visualized sensor for real-time tracking both large and subtle human movements with optical and electrical dual-signal feedbacks, realizing remote and precise visual-digital outputs. This work offers a versatile platform for emerging self-healing functional devices and visually interactive electronics, bringing huge developments in the era of the Internet of Things.
The increasing significance of data security promotes the development of multilevel information encryption and decryption techniques. However, the realization of logical outputs modulated by multiple stimuli is challenging in the design of advanced functional materials. Herein, a multilevel information decryption system with a combination of visual and digital outputs that responds to dual-optical inputs is developed based on a hydrogel-based synaptic device. ammonium molybdate nanoparticles and calcium alginate supramolecular networks is incorporated into a polyacrylamide hydrogel to enable optically regulated color change and ionic conductivity. Under UV irradiation, the reduction of the nanoparticles allows the hydrogel to change color as visual outputs. Meanwhile, the ionic conductivity of the hydrogel can be modulated by near-infrared (NIR) optical pulses to emulate the synaptic plasticity of biological synapses, producing NIR-mediated digital outputs. As a demonstration, a multilevel decryption strategy is provided using a hydrogel array that combines digital information decoding with visual information camouflage. Moreover, the short-term plasticity of the hydrogel synapse endows the system with time-dependent decryption, which improves information security and reduces the risk of data leakage. This study contributes to advancing multilevel decryption systems by providing an effective technique for integrating digital and visual decryption in hydrogel materials.
危险品化学品经营许可证（带存储）