Robust skin-integrated conductive biogel for high-fidelity detection under mechanical stress

Soft conductive gels are essential for epidermal electronics but often face challenges when interfacing with uneven surfaces or areas with extensive hair, especially under mechanical stress. In this study, we employed the concept of liquid-to-solid transformation to enhance integration at biointerfaces and designed an in-situ biogel capable of rapidly transitioning between liquid and solid states within 3 min via a temperature switch. The biogel features a semi-interpenetrating polymer network design and dual conduction pathways, resulting in high tensile strength (~1-3 MPa), a skin-compatible modulus (~0.3-1.1 MPa), strong skin adhesive strength (~1 MPa), and superior signal-to-noise ratio (SNR, ~30-40 dB).…

• AF
  Agency for Science, Technology and Research

  Award: M22K5a0045