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34 results on '"Gong, Jiangdong"'

10. Flexible optoelectronic N-I-P synaptic device with visible spectrum perception for energy-efficient artificial vision and efferent neuromuscular system.

Author

Wei, Huanhuan, Fu, Can, Yang, Wen, He, Gang, Guo, Jiahao, Ni, Yao, and Gong, Jiangdong

Subjects
NEUROMUSCULAR system, ARTIFICIAL vision, CLASSICAL conditioning, HIGHPASS electric filters, VISIBLE spectra
Abstract

We have designed a flexible photoelectric artificial synapse with an oxide/mixed perovskite/polymer N-I-P structure that exhibits essential synaptic plasticity. Formamidinium lead triiodide FAPbI3 perovskite doped with bromine and methylammonium (FAxMA1−xPbI2Br) is employed as the intrinsic layer to improve the optical properties of devices. Without requiring a power source in reaction to outside optical spikes, multiple pulse-dependent plasticity is reproduced on the synaptic devices, and the image's edges are sharpened using high-pass filtering. Additionally, the classical conditioning and spatiotemporal learning are copied under the electric pulse excitation. Significant negative differential resistance is evident, even after 1500 flex/flat mechanical operation. The recognition rate of letters in the visual system is as high as 92%, and the walking distance in the efferent neuromuscular system is controllable. The flexible optoelectronic N-I-P synaptic device is designed to facilitate energy-efficient information processing for neuromorphic computing. [ABSTRACT FROM AUTHOR]

Published
2024
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14. Thermally and Mechanically Stable Perovskite Artificial Synapse as Tuned by Phase Engineering for Efferent Neuromuscular Control

Author

Wei, Huanhuan, Gong, Jiangdong, Liu, Jiaqi, He, Gang, Ni, Yao, Fu, Can, Yang, Lu, Guo, Jiahao, Xu, Zhipeng, and Xu, Wentao

Abstract

The doping of perovskites with mixed cations and mixed halides is an effective strategy to optimize phase stability. In this study, we introduce a cubic black phase perovskite CsyFA(1–y)Pb(BrxI(1–x))3artificial synapse, using phase engineering by adjusting the cesium-bromide content. Low-bromine mixed perovskites are suitable to improve the electric pulse excitation sensitivity and stability of the device. Specifically, the low-bromine and low-cesium mixed perovskite (x= 0.15, y= 0.22) annealed at 373 K allows the device to maintain logic response even after 1000 mechanical flex/flat cycles. The device also shows good thermal stability up to temperatures of 333 K. We have demonstrated reflex-arc behavior with MCMHP synaptic units, capable of making sensory warnings at high frequency. This compositionally engineered, dual-mixed perovskite synaptic device provides significant potential for perceptual soft neurorobotic systems and prostheses.

Published
2024
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26. Lithium Ion Alloying-Type Artificial Synapses

Author

Wei, Huanhuan, primary, Yu, Haiyang, additional, Gong, Jiangdong, additional, Zhang, Jie, additional, Han, Hong, additional, Ma, Mingxue, additional, Ni, Yao, additional, Du, Yi, additional, Zhang, Shuo, additional, Liu, Lu, additional, and Xu, Wentao, additional

Published
2019
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32. Redox MXene Artificial Synapse with Bidirectional Plasticity and Hypersensitive Responsibility.

Author

Wei, Huanhuan, Yu, Haiyang, Gong, Jiangdong, Ma, Mingxue, Han, Hong, Ni, Yao, Zhang, Shuo, and Xu, Wentao

Subjects
NEUROMUSCULAR transmission, SYNAPSES, NERVOUS system, OXIDATION-reduction reaction, SENSORY neurons, ION migration & velocity
Abstract

Artificial synapses are key elements for the nervous system which is an emulation of sensory and motor neuron signal transmission. Here, the design and fabrication of redox‐behavior the metal carbide nanosheets, termed MXene artificial synapse, which uses a highly‐conductive MXene electrode, are reported. Benefiting from the special working mechanism of ion migration with adsorption and insertion, the device achieves world‐record power consumption (460 fW) of two‐terminal synaptic devices, and so far, the bidirectionally functioned synaptic device could effectively respond to ultra‐small stimuli at an amplitude of ±80 mV, even exceeding that of a biological synapse. Potential applications have also been demonstrated, such as dendritic integration and memory enhancement. The special strategy and superior electrical characteristics of the bidirectionally functioned electronic device pave the way to high‐power‐efficiency brain‐inspired electronics and artificial peripheral systems. [ABSTRACT FROM AUTHOR]

Published
2021
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34. Artificial synapses based on nanomaterials.

Author

Chen Y, Yu H, Gong J, Ma M, Han H, Wei H, and Xu W

Subjects
Brain physiology, Electronics, Humans, Nanostructures chemistry, Neural Networks, Computer
Abstract

Artificial synapses emulate biological synaptic signals in neuromorphic systems to attain brain-like computation and autonomous learning behaviors in non-von-Neumann systems. Several classes of materials have been applied to this field to achieve numerous functionalities of biological synapses. Nanomaterials (NMs), such as one-dimensional (1D) and two-dimensional (2D) NMs have shown great potential due to their nanometer feature size (1D) and molecular-level thickness (2D). In this paper, we review the development of artificial synapses, and discuss state-of-the-art artificial synapses based on NMs.

Published
2019
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