An Artificial Thermal Nociceptor Based on Xanthan Gum‐Gated Synaptic Transistors to Emulate Human Thermal Nociception

• Published in: Advanced intelligent systems 2022-12, Vol.4 (12), p.n/a
• Main Authors: Li, Fang Zhou, Liu, Hong Rui, Guo, Jian Miao, Zhou, Xin Yi, Liu, Ke Kang, Liang, Lin Zi, Pei, Xin Yi, Zhou, Fei Chi, Huang, Feng, Wang, Hong, Liu, Yang Hui
• Format: Article
• Language: English
• Subjects: artificial thermal nociceptors; Central nervous system; Cooling; Data processing; Electronic devices; Graphite; human thermal threshold; Humanoid; Humidity; Nervous system; Polydimethylsiloxane; Polysaccharides; Prostheses; Semiconductor devices; Sensors; synaptic transistors; Temperature; Temperature sensors; Thermal simulation; transient receptor potential vanilloid 1 (TRPV1); Transistors; Xanthan; xanthan gum electrolyte
• ISSN: 2640-4567; 2640-4567
• DOI: 10.1002/aisy.202200233

Nociceptors are kinds of sensory neurons that send warning information to the central nervous system in response to noxious stimuli. Thermal nociception happens as the thermal stimulus exceeds 45 °C as this temperature is perceived to be potentially harmful. Simulating this function is of great significance to developing bioinspired electronic skins and humanoid robots, which thus creates more demands for electronic devices that can simulate thermal nociception. Herein, an artificial thermal nociceptor (ATN) is fabricated by integrating a temperature sensor and a synaptic transistor, which can simulate the thermal pain threshold of the human body and operates in a very similar way as the transient receptor potential vanilloid 1 (TRPV1). For this ATN, the function of temperature sensing is realized by a graphite–polydimethylsiloxane (Gr–PDMS) composite temperature sensor, and the synaptic functions, as well as nociceptor features, are emulated through a synaptic transistor using xanthan gum polysaccharide electrolyte as gate dielectric, providing energy‐efficient building blocks for brain‐inspired computation systems. In a word, the ATN proposed can help to open a new avenue and provides more possibilities in the design of artificial sensory systems with the functions of temperature perception and thermal feedback. The artificial thermal nociceptor (ATN) fabricated by the integration of graphite–polydimethylsiloxane (Gr–PDMS) temperature sensor and xanthan gum‐gated synaptic transistor is demonstrated herein. This ATN has an activating threshold similar to the human thermal pain threshold. As a result, the human thermal nociception is simulated by the ATN for the first time.