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Flexible, biodegradable ultrasonic wireless electrotherapy device based on highly self-aligned piezoelectric biofilms
Haoyue Xue1, Jing Jin2, Zhi Tan1
1College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China.
Science Advances
|May 31, 2024
Summary
Researchers developed self-aligned piezoelectric films from gamma-glycine/polyvinyl alcohol using ultrasound. These biodegradable films enable wireless piezo-ultrasound devices that accelerate wound healing and degrade naturally.
Area of Science:
- Materials Science
- Bioelectronics
- Biomedical Engineering
Background:
- Biodegradable piezoelectric devices are crucial for transient bioelectronics.
- Current piezoelectric biomaterials face challenges in crystal alignment and piezoelectric strength.
Purpose of the Study:
- To develop optimally oriented, self-aligned piezoelectric gamma-glycine/polyvinyl alcohol (γ-glycine/PVA) films.
- To engineer flexible, bioresorbable, wireless piezo-ultrasound electrotherapy devices for wound healing.
Main Methods:
- Ultrasound-assisted synthesis of γ-glycine/PVA films.
- Density functional theory for understanding piezoelectric effects.
- Fabrication of wireless piezo-ultrasound devices for preclinical wound models.
Main Results:
- Achieved optimally oriented, self-aligned piezoelectric γ-glycine/PVA films.
- Demonstrated piezoelectricity of 10.4 pC/N and voltage coefficient of 324 × 10-3 V·m/N.
- Developed devices shortened wound healing by ~40% and were bioresorbable.
Conclusions:
- The study presents a reliable method for engineering piezoelectric biofilms.
- The developed devices show potential for effective transient bioelectronics and wound therapy.
