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Updated: Oct 26, 2025
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Published on: August 27, 2014
Electrical Writing Induced Covalent Cross-Linking on Hydrogel for Multidimensional Structural Information Storage.
Chen Yang1, Xiaowen Shi1, Luhe Qi1
1School of Resource and Environmental Science, Hubei Engineering Center of Natural Polymers-Based Medical Materials, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University, Wuhan 430079, China.
This study demonstrates storing dynamic information in polysaccharide hydrogel using electrically induced covalent cross-linking. The embedded information can be retrieved through various methods, enabling reprogrammable hydrogel applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biotechnology
Background:
- Hydrogels offer reprogrammable and responsive properties for dynamic information storage.
- Developing methods for stable information encoding in hydrogels is crucial for advanced applications.
Purpose of the Study:
- To report the storage and retrieval of structural information in polysaccharide hydrogel via electrically induced covalent cross-linking.
- To investigate the use of electrical inputs for dynamic information encoding in biopolymer-based hydrogels.
Main Methods:
- Electrically induced covalent cross-linking of polysaccharide hydrogel by localized OH- generation and diffusion.
- Utilizing electrical writing to create high pH domains (pH ~10) triggering cross-linking.
- Information retrieval through dye adsorption, chitosan protonation, and acid dissolution.
Main Results:
- Successfully stored dynamic 2D and 3D structural information in hydrogel.
- Written areas exhibited altered micromorphology, chemical properties, and pH sensitivity.
- Demonstrated eye-recognizable information storage and retrieval based on physical and chemical variations.
Conclusions:
- Stable electrical inputs can store dynamic structural information in biopolymer hydrogels.
- Chemically and physically altered regions allow for information encoding and retrieval.
- This technique offers a novel approach for creating responsive and reprogrammable information-storing materials.
