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Updated: Dec 15, 2025

Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment

Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment

Published on: July 22, 2022

Pencil-paper on-skin electronics.

Yadong Xu¹, Ganggang Zhao², Liang Zhu³

¹Department of Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, MO 65211.

Proceedings of the National Academy of Sciences of the United States of America

|July 15, 2020

Summary

This summary is machine-generated.

Researchers developed novel pencil-and-paper electronics for skin health monitoring. These low-cost devices can track vital signs and deliver treatments, offering a new approach to wearable health technology.

Keywords:

biochemical biophysical energy harvester on-skin electronics pencil–paper

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Area of Science:

Materials Science
Biomedical Engineering
Wearable Technology

Background:

Traditional writing materials like pencils and paper are inexpensive, accessible, and disposable.
Their potential for advanced applications in skin-interfaced health monitoring and interventions remains largely unexplored.

Purpose of the Study:

To investigate the feasibility of using pencil-drawn graphite on paper as a substrate for creating functional on-skin electronic devices.
To demonstrate the capabilities of these devices for both health monitoring and therapeutic interventions.

Main Methods:

Pencil-drawn graphite patterns on office-copy paper were utilized as conductive traces and sensing electrodes.
Fabricated devices included sensors for temperature, biopotentials, and sweat biomarkers (pH, uric acid, glucose).
Developed thermal stimulators, humidity energy harvesters, and a self-powered drug delivery system.

Main Results:

Pencil-paper devices achieved real-time, continuous, high-fidelity monitoring of vital signals (e.g., ECG, EMG, temperature, sweat biomarkers).
Signal quality was comparable to conventional monitoring methods.
Humidity energy harvesters generated sustained voltage from ambient humidity, powering a transdermal drug delivery system.

Conclusions:

Pencil-and-paper electronics offer a versatile, low-cost platform for advanced on-skin health monitoring and interventions.
This approach enables the development of disposable, biodegradable, and self-powered wearable devices.
Further exploration of 2D/3D circuits and reconfigurable assemblies is promising.