X-Ray Irradiation Improved WSe₂ Optical-Electrical Synapse for Handwritten Digit Recognition.

ABSTRACT: Two-dimensional (2D) materials are promising candidates for neuromorphic computing owing to their atomically thin structure and tunable optoelectronic properties. However, achieving controllable synaptic behavior via defect engineering remains challenging. In this work, we introduce X-ray irradiation as a facile strategy to modulate defect states and enhance synaptic plasticity in WSe₂-based optoelectronic synapses. The introduction of selenium vacancies via irradiation significantly improved both electrical and optical responses. Under electrical stimulation, short-term potentiation (STP) exhibited enhanced excitatory postsynaptic current (EPSC) retention exceeding 10%, measured 20 s after the stimulation peak. In addition, the nonlinearity of long-term potentiation (LTP) and l

SUBMITTER: Chen C 

PROVIDER: S-EPMC12472380 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature