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Flexible artificial nociceptor using a biopolymer-based forming-free memristor
Jun Ge1, Shan Zhang, Zhiyu Liu
1Solid State Physics & Material Research Laboratory, School of Physics and Electronic Engineering, Guangzhou University, Guangzhou, 510006, China. speegejun510@gzhu.edu.cn sspan@gzhu.edu.cn.
Nanoscale
|January 19, 2019
Summary
Researchers developed flexible electronic nociceptors using biopolymers. These artificial nociceptors mimic pain receptors, showing unique sensory behaviors and enabling a pressure sensory alarm system.
Area of Science:
- Materials Science
- Biomedical Engineering
- Neuroscience
Background:
- Developing artificial nociceptors is key for electronic receptors that interface with the nervous system.
- Biopolymers offer advantages like abundance, low cost, biocompatibility, and flexibility for artificial sensory devices.
Purpose of the Study:
- To demonstrate nociceptor behaviors using flexible memristors based on carboxymethyl ι-carrageenan.
- To investigate the potential of these devices as artificial nociceptors for electronic receptors.
Main Methods:
- Fabrication of flexible Ag/carboxymethyl ι-carrageenan/ITO/PET forming-free memristors.
- Characterization of electrical properties, including threshold switching, endurance, and bending stability.
- Analysis of unique nociceptive behaviors like threshold, relaxation, allodynia, and hyperalgesia.
Main Results:
- The flexible memristor exhibited threshold switching with a high ON/OFF ratio (∼10^4) and excellent endurance (>1.5 × 10^5 cycles).
- The device demonstrated high bending endurance (>1000 cycles) under various conditions.
- Nociceptive behaviors, including allodynia and hyperalgesia, were observed and attributed to silver filament dynamics.
Conclusions:
- Flexible biopolymer-based memristors can effectively mimic nociceptor functions.
- These artificial nociceptors show promise for advanced electronic sensory systems.
- A functional pressure sensory alarm system was successfully built using these novel devices.
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