All-Organic, Solution-Processed, Extremely Conformal, Mechanically Biocompatible, and Breathable Epidermal...

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Conformal integration of epidermal devices with skin requires breathability to minimize tissue stress.
• Nanofiber meshes are used for breathable devices, often with expensive noble metal electrodes requiring complex vacuum processing.
• Existing methods for breathable electrodes are costly and involve time-consuming, multi-step procedures.

Purpose of the Study:

• To develop a simple, cost-effective, mechanically biocompatible, and breathable organic epidermal electrode for biometric devices.
• To explore the use of Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as an alternative to noble metals.
• To establish a facile post-processing method for enhancing electrode performance and sterilization.

Main Methods:

• Spraying Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) onto a nanofiber-mesh structure.
• Applying a heat and water treatment using an autoclave for enhanced conductivity and biocompatibility.
• Simultaneously reducing electrical resistance and sterilizing the electrode.

Main Results:

• A cost-effective, mechanically biocompatible, and breathable organic epidermal electrode was successfully fabricated.
• The autoclave treatment significantly improved the conductivity of the PEDOT:PSS electrode.
• The developed electrode is suitable for practical biomedical applications due to its properties and sterilization.

Conclusions:

• This research presents an affordable and biocompatible solution for epidermal electrodes.
• The facile heat and water treatment offers a scalable alternative to traditional vacuum-based methods.
• The findings pave the way for improved wearable biomedical devices with enhanced epidermal integration.