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Related Experiment Video

Updated: Jul 7, 2025

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Skin-Integrated Electrodes Based on Room-Temperature Curable, Highly Conductive Silver/Polydimethylsiloxane

Jun Zhao1, Jiuqing Feng2, Yizhou Jiang2

  • 1Department of Materials Science, State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, China.

Small (Weinheim an Der Bergstrasse, Germany)
|December 26, 2023
PubMed
Summary

This study introduces a novel skin-integrated electrode using a silver-PDMS composite. This advanced electrode technology improves electrophysiological signal quality during motion and underwater use.

Keywords:
electrically conductive compositeselectrophysiological electrodesin situ curingon‐skin electronics

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Electrophysiology

Background:

  • Electrode-skin contact is crucial for electrophysiological (EP) signal quality.
  • Motion and water exposure compromise traditional electrode adhesion and signal integrity.
  • Existing electrode attachment methods are susceptible to instability and artifacts.

Purpose of the Study:

  • To develop a novel skin-integration strategy for enhanced electrode performance.
  • To create a conductive, room-temperature curable composite for seamless skin integration.
  • To improve the stability and reduce artifacts in EP signal recording.

Main Methods:

  • A composite of silver microflakes and polydimethylsiloxane (Ag/PDMS) was developed.
  • The Ag/PDMS composite was applied to the skin, allowing PDMS oil diffusion into the stratum corneum.
  • The composite was cured in situ, forming an integrated electrode.
  • The integrated electrode's performance was evaluated for motion artifacts, interface impedance, and water resistance.

Main Results:

  • The skin-integration strategy resulted in electrodes that seamlessly integrated with the skin.
  • Motion artifacts were significantly minimized due to reduced electrode-skin displacement.
  • Interface impedance was substantially reduced (67% of commercial Ag/AgCl gel electrodes at 100 Hz).
  • The hydrophobic nature of the electrode enabled it to withstand water flushes.

Conclusions:

  • The developed Ag/PDMS skin-integrated electrode offers superior performance compared to traditional methods.
  • This technology significantly enhances EP signal recording quality during motion and underwater conditions.
  • The skin-integration strategy presents a promising advancement for wearable and robust electrophysiological monitoring.