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An Additive Manufacturing Technique for the Facile and Rapid Fabrication of Hydrogel-based Micromachines with Magnetically Responsive Components
Published on: July 18, 2018
3D-printed implantable bioelectronics enabled by anti-swelling and biphasic conductive hydrogels
Yuan Yao1,2, Jianhua Luo3,4,5, Yue Hui6
1Research Center for Industries of the Future, Westlake University, Hangzhou, China. yaoyuan@westlake.edu.cn.
Nature Materials
|July 31, 2026
Summary
Researchers developed novel anti-swelling hydrogels for implantable bioelectronics. These soft, stretchable materials improve device stability and reduce biological rejection, enabling advanced brain-computer interfaces and nerve stimulators.
Area of Science:
- Biomedical Engineering
- Materials Science
- Neuroscience
Background:
- Hydrogel bioelectronics offer potential for interfacing biological and electronic systems.
- Challenges include swelling-induced degradation and electrical failure in physiological environments.
Purpose of the Study:
- To develop soft, stretchable, and anti-swelling hydrogels for stable implantable bioelectronics.
- To engineer conductive hydrogel inks for 3D printing of bioelectronic devices.
Main Methods:
- Micellar self-assembly to create anti-swelling hydrogels.
- Microgel strategy for supporting matrix and conductive ink fabrication.
- Controlled monomer diffusion for tailoring conductive phase properties.
Main Results:
- Achieved high conductivity (up to 4,000 S/cm) and extreme stretchability (>1,300% strain at failure).
- Demonstrated reduced foreign-body reactions compared to conventional materials.
- Successfully 3D printed various bioelectronic implants, including brain-computer interfaces and nerve stimulators.
Conclusions:
- The developed anti-swelling hydrogels provide a stable platform for implantable bioelectronics.
- 3D printed devices exhibit long-term operational stability and reliability in vivo.
- This technology advances the development of next-generation bioelectronic medicine.
