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Ferromagnetic Flexible Electronics for Brain-Wide Selective Neural Recording.

Yuxin Liu1, Xi Chen2, Ye Liang2

  • 1Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Sun Yat-sen University, Shenzhen, Guangdong, 518107, China.

Advanced Materials (Deerfield Beach, Fla.)
|December 1, 2022
PubMed
Summary

Injectable flexible electronics offer stable neural recording and remote navigation for brain research. This magnetic-actuated technology enables minimally invasive, 3D brain exploration and precise data acquisition.

Keywords:
electrodesferromagneticflexible electronicsneural activities

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Materials Science

Background:

  • Flexible microelectronics are crucial for neural circuit research but face implantation and coverage limitations.
  • Existing technologies struggle with bending, buckling, and accessing extensive brain regions.

Purpose of the Study:

  • To present an injectable, magnetically actuated electronic system for stable neural recording and precise navigation.
  • To overcome limitations of current flexible electronics in minimally invasive brain exploration.

Main Methods:

  • Development of injectable microelectrodes coated with magnetic nanoparticles.
  • Utilizing magnetic actuation for omnidirectional steering and 3D brain interpenetration.
  • Demonstration of selective and multiplexed neural activity recording in deep rodent brains.

Main Results:

  • The injected electronics become ultra-flexible and magnetically actuated after biodegradable coating removal.
  • Successful selective and multiplexed recording of neural activities across distant brain regions.
  • Demonstrated coupling with optogenetic stimulation for in vivo projection dynamics readout.

Conclusions:

  • This paradigm-shifting injectable electronics platform enables stable, remotely controlled neural recording.
  • The technology facilitates minimally invasive 3D manipulation in soft tissues, with potential for broader organ system applications.
  • Offers significant potential for biomedical science and engineering advancements.