Artificial Photothermal Nociceptor Using Mott Oscillators

IF 14.3 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Pyeongkang Hur, Daseob Yoon, Minwook Yoon, Yunkyu Park, Junwoo Son
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Abstract

Bioinspired sensory systems based on spike neural networks have received considerable attention in resolving high energy consumption and limited bandwidth in current sensory systems. To efficiently produce spike signals upon exposure to external stimuli, compact neuron devices are required for signal detection and their encoding into spikes in a single device. Herein, it is demonstrated that Mott oscillative spike neurons can integrate sensing and ceaseless spike generation in a compact form, which emulates the process of evoking photothermal sensing in the features of biological photothermal nociceptors. Interestingly, frequency-tunable and repetitive spikes are generated above the threshold value (Pth = 84 mW cm−2) as a characteristic of “threshold” in leaky-integrate-and-fire (LIF) neurons; the neuron devices successfully mimic a crucial feature of biological thermal nociceptors, including modulation of frequency coding and startup latency depending on the intensity of photothermal stimuli. Furthermore, Mott spike neurons are self-adapted after sensitization upon exposure to high-intensity electromagnetic radiation, which can replicate allodynia and hyperalgesia in a biological sensory system. Thus, this study presents a unique approach to capturing and encoding environmental source data into spikes, enabling efficient sensing of environmental sources for the application of adaptive sensory systems.

Abstract Image

利用Mott振荡器的人工光热伤害感受器。
基于脉冲神经网络的仿生传感系统在解决当前传感系统中高能量消耗和有限带宽的问题方面受到了广泛的关注。为了有效地在暴露于外部刺激时产生尖峰信号,需要紧凑的神经元设备来检测信号并将其编码为单个设备中的尖峰信号。本研究证明,Mott振荡尖峰神经元可以将传感和不断产生的尖峰结合在一个紧凑的形式中,模拟了生物光热伤害感受器特征中唤起光热传感的过程。有趣的是,频率可调和重复尖峰在阈值(Pth = 84 mW cm-2)以上产生,这是泄漏-整合-触发(LIF)神经元的“阈值”特征;该神经元装置成功地模拟了生物热伤害感受器的一个关键特征,包括根据光热刺激强度调制频率编码和启动延迟。此外,Mott spike神经元在暴露于高强度电磁辐射后敏化后自适应,可以在生物感觉系统中复制异常痛觉和痛觉过敏。因此,本研究提出了一种独特的方法来捕获环境源数据并将其编码为峰值,从而为自适应感觉系统的应用实现对环境源的有效感知。
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来源期刊
Advanced Science
Advanced Science CHEMISTRY, MULTIDISCIPLINARYNANOSCIENCE &-NANOSCIENCE & NANOTECHNOLOGY
CiteScore
18.90
自引率
2.60%
发文量
1602
审稿时长
1.9 months
期刊介绍: Advanced Science is a prestigious open access journal that focuses on interdisciplinary research in materials science, physics, chemistry, medical and life sciences, and engineering. The journal aims to promote cutting-edge research by employing a rigorous and impartial review process. It is committed to presenting research articles with the highest quality production standards, ensuring maximum accessibility of top scientific findings. With its vibrant and innovative publication platform, Advanced Science seeks to revolutionize the dissemination and organization of scientific knowledge.
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