Oxygen‐Detecting Synaptic Device for Realization of Artificial Autonomic Nervous System for Maintaining Oxygen Homeostasis

Incorporation of various functions of a biological nervous system into electronic devices is an intriguing challenge in the realization of a human‐like recognition and response system. Emerging artificial synaptic devices capable of processing electronic signals through neuromorphic functions operat...

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Bibliographic Details
Published in:Advanced materials (Weinheim) 2020-08, Vol.32 (34), p.e2002653-n/a
Main Authors: Qian, Chuan, Choi, Yongsuk, Choi, Young Jin, Kim, Seongchan, Choi, Yoon Young, Roe, Dong Gue, Kang, Moon Sung, Sun, Jia, Cho, Jeong Ho
Format: Article
Language:English
Subjects:
10‐perylene tetracarboxylic diimide
artificial synaptic devices
Autonomic nervous system
Biomimetics
copper‐phthalocyanine
Current carriers
Electronic devices
Heterojunctions
Homeostasis
Materials science
N,Nʹ‐dioctyl‐3
Negative feedback
Nervous system
organic double heterojunctions
Oxygen
oxygen sensors
Signal processing
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Summary:Incorporation of various functions of a biological nervous system into electronic devices is an intriguing challenge in the realization of a human‐like recognition and response system. Emerging artificial synaptic devices capable of processing electronic signals through neuromorphic functions operate such biomimetic systems similarly to biological nervous systems. Here, an oxygen‐sensitive artificial synaptic device that simultaneously detects oxygen concentration and generates a synaptic signal is demonstrated. The device successfully achieves an interconversion between the excitatory and inhibitory modes of the synaptic current at various oxygen concentrations by virtue of an oxygen‐sensitive trilayered organic double heterojunction. The oxygen‐induced traps in the organic layer modulate the majority charge carrier from holes to electrons, and this modulation induces an interconversion between the excitatory and inhibitory modes according to the environmental oxygen condition. Finally, the proposed synaptic device is applied to the realization of a negative feedback system for regulation of oxygen homeostasis, which mimics the human autonomic nervous system. The oxygen‐sensitive synaptic device proposed in this study is expected to open up new possibilities for the development of a biomimetic neural system that can respond appropriately to various environmental changes. An oxygen‐sensitive artificial synaptic device that simultaneously detects oxygen concentration and generates a synaptic signal is fabricated. This device successfully achieves an interconversion between the excitatory and inhibitory modes of the synaptic current at various oxygen concentrations. The device is also used to realize a negative‐feedback system for maintaining oxygen homeostasis, which mimics the human autonomic nervous system.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202002653