Fengxia Yang,Hao Sun,Xiang Zhang,Dandan Chen,Jianbiao Chen,Xuqiang Zhang,Jiangtao Chen,Yun Zhao,Yan Li
Self-rectifying optoelectronic synaptic memristor integrates the multi-field regulated dynamic plasticity of biological synapses while effectively addressing the long-standing challenge of parasitic current suppression in high-density device arrays. This work demonstrates an Ag/CZTSSe/Mo (CZTSSe: Cu 2 ZnSn(S, Se) 4 ) optoelectronic synaptic memristor enabling reversible switching between bipolar resistive switching and self-rectifying modes, thus functioning simultaneously as a selector and memristor. The non-volatile bipolar switching behavior features bias-modulated On/Off ratio (2.2 × 10 2 –5.1 × 10 3 ) and a near-infrared light-tunable reset voltage (0.52–0.06 V), while the self-rectifying characteristic maintains a rectification ratio of >10 3 over 100 switching cycles. Under either electrical or light (470–980 nm) stimuli, the memristor emulates key artificial synaptic behaviors, including excitatory postsynaptic current, paired-pulse facilitation, long-term potentiation/depression, spike-timing-dependent plasticity, and short-to-long-term memory (S/LTM) transitions. Notably, its realized applications, including 1) reset-dominated unclonable security encryption, 2) visible-light vision imaging to near-infrared weak-signal detection, and 3) envelope demodulation of amplitude-modulated signals for long-distance high-accuracy data transmission, highlight its cross-disciplinary advantages in neuromorphic computing.
Junze Zhang,Tiandi Chen,Meng Zhu,Jian Lu,Xinlong Liu,Weiwei Sun,Mei Yi So,Bingang Xu
Fiber-based photochromic wearables have attracted growing attention in sustainable photo-patterning information displays, information security encryption, and optical data recording/storage. Molybdenum trioxide (MoO 3 ) is one of the key photochromic materials that possesses good photochromic performance, nevertheless, it faces considerable challenges in preparing photochromic textiles with stable, scalable, and long color-retention properties. In this work, a new kind of fiber-based photochromic wearables is designed and developed by combining cotton fabric with a MoO 3 -based self-adhesive polymer network and long chain silyl group. The prepared photochromic wearable has exhibited excellent fatigue resistance and favorable reversibility (> 40 cycles), rapid light response (reach color saturation with a UV dose of 60 kJ m −2 ), outstanding color retention capability (> 90 days), and desirable biocompatibility (cell viability > 100%). In addition, the prepared photochromic textiles could maintain a fast light response and excellent color retention even after experiencing repeated washing (20 cycles). Moreover, the photo-patterning photochromic wearables are verified by resisting the deterioration of acid solution, alkali solution, and sweat (pH 2.0–9.0) as well as keeping clear patterns under sunlight irradiation. As a demonstration of the application, fiber-based photochromic wearables are made and employed for the sustainable applications of rewritable photo-patterning and information security encryption.
危险品化学品经营许可证（带存储）