Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China.
Research Center of Resource Chemistry and Energy Materials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
J Phys Chem Lett. 2024 Aug 29;15(34):8667-8675. doi: 10.1021/acs.jpclett.4c02281. Epub 2024 Aug 19.
Emerging optoelectronic memristive devices with high parallelism and low-power consumption have made neuromorphic computing hardware a tangible reality. The coordination of conductivity regulation through both electrical and light signals is pivotal for advancing the development of synaptic memristors with brainlike functionalities. Here, an artificial visual synapse is presented with the TiC MXene memristor which demonstrates not only the nonvolatile memory effect (Set/Reset: 0.58/-0.55 V; Retention: >10 s) and sustained multistage conductivity, but also facile modulation of both electrical- and light-stimulated synaptic behaviors. By adjusting the stimulus parameters, the TiC MXene enables the realization of biosynaptic excitatory postsynaptic current, sustained conductivity, stable long-term facilitation/depression, paired pulse facilitation, spiking-timing-dependent plasticity, and experiential learning. Particularly, benefiting from the distinguishable photoconductive and memory effects of multiple near-infrared intensities (7-13 mW/cm), potential applications in visual nociceptive perception ("threshold", "noadaption", "relaxation") and imaging (e.g., "Superman" cartoon character) in infrared environments are well achieved in such TiC MXene memristors. These results hold significant implications for the future advancement of integrated optoelectronic sensing, memory, nociception, and imaging systems.
具有高并行性和低功耗的新兴光电忆阻器件使得神经形态计算硬件成为现实。通过电信号和光信号协同调节导电性对于开发具有类脑功能的突触忆阻器至关重要。在这里，提出了一种具有 TiC MXene 忆阻器的人工视觉突触，该忆阻器不仅具有非易失性记忆效应（Set/Reset：0.58/-0.55 V；Retention：>10 s）和持续的多阶导电性，而且还可以轻松调节电和光刺激的突触行为。通过调整刺激参数，TiC MXene 实现了生物突触兴奋性后突触电流、持续导电性、稳定的长期易化/压抑、成对脉冲易化、尖峰时间依赖可塑性和体验式学习。特别地，受益于多个近红外强度（7-13 mW/cm）的可区分光导和记忆效应，TiC MXene 忆阻器在红外环境中的视觉伤害感知（“阈值”、“无适应”、“放松”）和成像（例如，“超人”卡通人物）方面具有潜在的应用。这些结果对于集成光电传感、记忆、伤害感知和成像系统的未来发展具有重要意义。
