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Updated: Dec 25, 2025
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Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment
Published on: July 22, 2022
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A wearable freestanding electrochemical sensing system.
Yichao Zhao1,2, Bo Wang1, Hannaneh Hojaiji1
1Interconnected & Integrated Bioelectronics Lab (IBL), Department of Electrical and Computer Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
Science Advances
|March 29, 2020
Summary
Researchers engineered a strain-isolated pathway for wearable biosensors, creating a freestanding electrochemical sensing system (FESS). This FESS-enabled smartwatch accurately monitors sweat biomarkers during exercise.
Area of Science:
- Biomedical Engineering
- Wearable Technology
- Biosensors
Background:
- High-fidelity wearable biomarker data requires optimized information delivery from biofluid to readout.
- Microfluidic devices face challenges with strain affecting biomarker data integrity.
Purpose of the Study:
- To engineer a strain-isolated pathway for preserving biomarker data fidelity.
- To develop a generalizable and disposable freestanding electrochemical sensing system (FESS).
- To integrate FESS into a smartwatch for real-time sweat metabolite monitoring.
Main Methods:
- Examined biomarker information delivery pathways and identified near-zero strained regions in microfluidic devices.
- Engineered a strain-isolated pathway using a freestanding electrochemical sensing system (FESS) with double-sided adhesion.
- Developed a FESS-enabled smartwatch for sweat sampling, electrochemical sensing, and data transmission.
Main Results:
- Successfully devised a generalizable and disposable FESS for sensing and signal interconnection.
- Demonstrated a system-level design strategy addressing motion artifacts and consumer electronics integration.
- Validated the FESS-enabled smartwatch for monitoring sweat metabolite profiles in sedentary and exercise conditions.
Conclusions:
- The engineered strain-isolated pathway preserves biomarker data fidelity in wearable biosensors.
- The FESS-enabled smartwatch offers a self-contained platform for continuous sweat analysis.
- This technology advances wearable biosensing for health monitoring during physical activity.
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