Flexible and transparent memristive synapse based on polyvinylpyrrolidone/N-doped carbon quantum dot nanocomposites for neuromorphic computing
| Autor: | Zhi Yang, Zhongqiang Wang, Haiyang Xu, Xiaoning Zhao, Tao Zeng, Yankun Cheng, Xiaochi Hu, Yichun Liu, Ya Lin, Jiabing Liang |
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| Rok vydání: | 2021 |
| Předmět: |
Kelvin probe force microscope
Materials science Nanocomposite Postsynaptic Current General Engineering Bioengineering Nanotechnology 02 engineering and technology General Chemistry Plasticity 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Space charge Atomic and Molecular Physics and Optics 0104 chemical sciences Neuromorphic engineering Quantum dot Hybrid system General Materials Science 0210 nano-technology |
| Zdroj: | Nanoscale Advances. 3:2623-2631 |
| ISSN: | 2516-0230 |
| Popis: | Memristive devices are widely recognized as promising hardware implementations of neuromorphic computing. Herein, a flexible and transparent memristive synapse based on polyvinylpyrrolidone (PVP)/N-doped carbon quantum dot (NCQD) nanocomposites through regulating the NCQD doping concentration is reported. In situ Kelvin probe force microscopy showed that the trapping/detrapping of space charge can account for the memristive mechanism of the device. Diverse synaptic functions, including excitatory postsynaptic current (EPSC), paired-pulse facilitation (PPF), spike-timing-dependent plasticity (STDP), and the transition from short-term plasticity (STP) to long-term plasticity (LTP), are emulated, enabling the PVP–NCQD hybrid system to be a valuable candidate for the design of novel artificial neural architectures. In addition, the synaptic device showed excellent flexibility against mechanical strain after repeated bending tests. This work provides a new approach to develop flexible and transparent organic artificial synapses for future wearable neuromorphic computing systems. |
| Databáze: | OpenAIRE |
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