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A Biomimetic Nociceptor Using Centrosymmetric Crystals for Machine Intelligence.

Wenjie Wang1, Yingfei Wang1, Li Xiang1

  • 1Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, College of Chemistry and Chemical Engineering, College of Materials Science and Engineering, Hunan University, Changsha, 410082, China.

Advanced Materials (Deerfield Beach, Fla.)
|November 29, 2023
PubMed
Summary

Researchers developed a new material, Cr3+-doped zinc gallogermanate (ZGGO:Cr), that mimics the body's pain sensors. This innovation enables advanced biomimetic nociceptors for intelligent systems and robotic applications.

Keywords:
biomimetic nociceptorsintelligent terminalsmechanoluminescencemultimodal sensorstriboelectric effect

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Neuroscience

Background:

  • Pain sensation relies on force-activated nociceptors that encode electrochemical signals.
  • Multi-dimensional mechano-sensing materials offer potential for biomimetic nociceptors but are limited by crystal structure requirements.
  • Existing materials often depend on non-centrosymmetric crystals, restricting their application.

Purpose of the Study:

  • To report a novel centrosymmetric crystal, Cr3+-doped zinc gallogermanate (ZGGO:Cr), with multi-dimensional mechano-sensing capabilities.
  • To overcome the limitations of crystal structure in developing biomimetic nociceptors.
  • To demonstrate a path toward bionic pain perception using advanced materials.

Main Methods:

  • Synthesized and characterized centrosymmetric Cr3+-doped zinc gallogermanate (ZGGO:Cr).
  • Investigated the mechano-sensing properties, including electrical signal generation and luminescence under mechanical force.
  • Developed a wireless biomimetic nociceptor system utilizing the ZGGO:Cr material.

Main Results:

  • ZGGO:Cr exhibits multi-dimensional mechano-sensing, generating electrical signals mimicking neuronal systems under force.
  • The material produces luminescence for spatial mapping of mechanical stimuli, crucial for pain perception.
  • A wireless biomimetic nociceptor system was successfully developed and tested.

Conclusions:

  • Centrosymmetric ZGGO:Cr overcomes previous crystal structure limitations for mechano-sensing materials.
  • The developed material and system pave the way for advanced bionic pain perception.
  • Demonstrated practical applications in a robotic hand for smart pain reflex and in robot-assisted surgery.