Programming Molecular Switches within Capacitive PEDOT:DNA Hydrogels for Deciphering Pathophysiological
Hao Wang1, Zinan Zhao1, Yao Xu1
1Department of Polymeric Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Nano Letters
|December 12, 2025
Summary
This study introduces novel capacitive poly(3,4-ethylenedioxythiophene):DNA hydrogels for wound management. These smart hydrogels detect biomarkers by changing capacitance, enabling real-time wound status monitoring via smartphones.
Area of Science:
- Biomaterials Science
- Biosensing Technology
- Nanotechnology
Background:
- Capacitive sensing offers potential for wound management but lacks biomarker responsiveness.
- Current sensing materials struggle to monitor complex wound microenvironments.
- Developing responsive materials is crucial for advanced wound diagnostics.
Purpose of the Study:
- To develop novel capacitive poly(3,4-ethylenedioxythiophene):DNA (pDNA) hydrogels for wound management.
- To create a sensing system capable of detecting wound biomarkers and pathophysiological changes.
- To enable real-time, smartphone-based monitoring of wound status.
Main Methods:
- Covalent cross-linking of pDNA and poly(ethylene glycol) diglycidyl ether to form hydrogels.
- Utilizing a metastable DNA duplex within the hydrogel that responds to biomarkers by conformational changes.
- Integrating a portable capacitance detector with Bluetooth for wireless data transmission.
Main Results:
- The pDNA hydrogel exhibits a switchable "ON" to "OFF" molecular circuit in response to stimuli, decreasing capacitance.
- Demonstrated real-time tracking of pH, inflammation, and infection status in diabetic wounds.
- Successful wireless data relay to smartphones for intelligent wound analysis.
Conclusions:
- The developed capacitive pDNA hydrogels offer a promising platform for sensitive and real-time wound monitoring.
- This technology enables non-invasive tracking of wound healing dynamics and therapeutic response.
- The system facilitates intelligent wound management through accessible smartphone integration.
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