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Electrolyte-Sensing Transistor Decals Enabled by Ultrathin Microbial Nanocellulose
Jonathan D Yuen1, Scott A Walper1, Brian J Melde1
1Center for Bio/Molecular Science and Engineering, U.S. Naval Research Laboratory, 4555 Overlook Ave. SW, Washington D.C. 20375, USA.
Scientific Reports
|January 20, 2017
Summary
We developed an ultra-thin electronic decal that collects and analyzes bio-fluids. This innovative epidermal electronic device integrates organic electrochemical transistors for sensitive, real-time health monitoring.
Area of Science:
- Biomedical Engineering
- Materials Science
- Wearable Technology
Background:
- Epidermal electronics require advanced methods for bio-fluid handling and sensing.
- Integrating sensing components with sample collection remains a challenge for wearable devices.
Purpose of the Study:
- To develop an ultra-thin electronic decal for simultaneous bio-fluid collection, transmission, and interrogation.
- To integrate organic electrochemical transistors (OECTs) with a microbial nanocellulose membrane for epidermal applications.
Main Methods:
- Fabrication of an ultra-thin electronic decal combining a thin-film OECT with a microbial nanocellulose wicking membrane.
- Utilizing vertical wicking for efficient bio-fluid delivery to the transistor.
- Characterization of the OECT's performance, including current and ON-OFF ratios.
Main Results:
- Achieved high currents and ON-OFF ratios in the integrated OECT system.
- Demonstrated sensitivity as low as 1 mg·L⁻¹ for bio-fluid analysis.
- The decal design physically isolates electronics from the skin while enabling effective bio-fluid transport.
Conclusions:
- The developed electronic decal represents a novel approach for epidermal bio-fluid sensing.
- This technology enables efficient bio-fluid handling and sensitive analysis for wearable health monitoring.
- The integration of OECTs on permeable membranes opens new avenues for advanced epidermal electronics.
