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Multifunctional Nanomesh Enables Cellular-Resolution, Elastic Neuroelectronics.

Jaehyeon Ryu1, Yi Qiang1, Longtu Chen2

  • 1Thayer School of Engineering, Dartmouth College, Hanover, NH, 03755, USA.

Advanced Materials (Deerfield Beach, Fla.)
|July 16, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed novel elastic microelectrodes using a nanomesh structure for better nervous system interfacing. This technology achieves high-resolution neural recording, overcoming previous scalability and mechanical mismatch challenges in silicone-based devices.

Keywords:
elasticmultifunctionnanomeshneuroelectronics

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Silicone-based devices offer ideal nervous tissue interfacing but face scalability issues due to mechanical mismatches.
  • Existing electronic materials struggle to integrate seamlessly with soft elastomer substrates.

Purpose of the Study:

  • To develop scalable, elastic microelectrodes with cellular resolution for improved neuroelectronic interfaces.
  • To overcome the mechanical mismatch between conventional electrode materials and silicone substrates.

Main Methods:

  • Engineered a multifunctional nanomesh with an in-plane nanoscale pattern using Parylene-C, gold (Au), and Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS).
  • Validated the elastic neuroelectronics via single-unit recording from mouse dorsal root ganglia (DRG).

Main Results:

  • Achieved unprecedented cellular resolution in elastic microelectrodes directly on polydimethylsiloxane (PDMS) silicone.
  • Demonstrated superior recording quality and self-conformation on the curvilinear epidural surface of DRG compared to control devices.
  • Electrode scaling studies confirmed the necessity of cellular resolution for high-fidelity neural recording.

Conclusions:

  • Established nanomeshing as a viable method to utilize traditional electrode materials for advanced elastic neuroelectronics.
  • Developed a minimally invasive device for single-cell resolution interfacing with DRG sensory afferents.
  • Paved the way for scalable, high-performance neuroelectronic interfaces using soft materials.