Journal
NANOSCALE ADVANCES
Volume 3, Issue 9, Pages 2623-2631Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1na00152c
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Funding
- Ministry of Science and Technology of China [2018YFE0118300, 2019YFB2205100]
- NSFC [52025022]
- NSFC Program [11974072, 52072065, 51732003, 51872043, 51902048, 61774031, 61574031, U19A2091]
- 111 Project [B13013]
- Ministry of Education of China [6141A02033414]
- China Postdoctoral Science Foundation [2019M661185]
- Fundamental Research Funds for the Central Universities [2412019QD015]
- Jilin Province [JJKH20201163KJ]
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This study presents a flexible and transparent memristive synapse based on PVP/NCQD nanocomposites, which successfully emulate diverse synaptic functions and demonstrate excellent mechanical strain adaptability.
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.
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