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Conductive Reflow-Resistant Self-Healing Nanocomposite-Structured Adhesives for Reliable and Versatile Bioelectronic

Dohyun Lim1, Hyeonseo Cheon1, Seung Hwan Jeon1

  • 1School of Chemical Engineering, Sungkyunkwan University (SKKU), 2066 Seobu-ro, Jangan-gu, Suwon 16419, Republic of Korea.

ACS Nano
|March 25, 2026
PubMed
Summary

This study introduces a self-healing, stretchable electronic skin adhesive inspired by cephalopods. It offers stable adhesion and reliable signal acquisition for advanced wearable bioelectronics.

Keywords:
biomimeticsdry adhesivereinforced compositeself-healing conductorstretchable electronics

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Area of Science:

  • Materials Science
  • Biomedical Engineering
  • Robotics

Background:

  • Wearable bioelectronics require materials with stable adhesion, stretchability, and self-healing properties.
  • Existing self-healable materials often compromise performance due to inherent flowability.
  • Cephalopod-inspired designs offer potential solutions for advanced adhesive interfaces.

Purpose of the Study:

  • To develop a stable, repositionable, and self-healing adhesive electrode for electronic skin applications.
  • To overcome the performance limitations of current self-healable materials.
  • To create a biocompatible interface for robust bioelectronic signal acquisition.

Main Methods:

  • Fabrication of a double-layered adhesive electrode using single-walled carbon nanotubes and supramolecular polymers.
  • Implementation of a reflow-controlled mechanism to enhance material stability and prevent degradation.
  • Characterization of the material's mechanical properties, adhesion under various conditions, and self-healing capabilities.

Main Results:

  • The developed electrode exhibits a Young's modulus of ~425 kPa, indicating softness and flexibility.
  • The material demonstrates dimensional stability in underwater, high-pressure, and mild heat conditions for over 7 days.
  • The adhesive interface achieves robust adhesion in diverse environments (wet, rough, dynamic) and enables effective electrocardiogram/electromyogram signal acquisition.

Conclusions:

  • The reflow-controlled, self-healing adhesive electrode provides a stable and versatile interface for advanced wearable bioelectronics.
  • The cephalopod-inspired design overcomes limitations of traditional self-healable materials, enhancing performance and durability.
  • This technology facilitates reliable bioelectronic signal acquisition and robotic control in dynamic scenarios, even after aging or healing.