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Updated: Feb 20, 2026

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

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Published on: April 16, 2018

DNA Hydrogel with Tunable pH-Responsive Properties Produced by Rolling Circle Amplification.

Wanlin Xu^1,2, Yishun Huang¹, Haoran Zhao¹

¹Department of Materials Science and Engineering, Southern University of Science and Technology, 1088 Xueyuan Blvd., Nanshan District, Shenzhen, Guangdong, 518055, P.R. China.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|October 27, 2017

Summary

Researchers developed a new method using rolling circle amplification (RCA) to create pH-responsive DNA hydrogels. This technique simplifies fabrication and allows for precise tuning of hydrogel properties through template design.

Keywords:

DNA structures gels pH effects rolling circle amplification self-assembly

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Area of Science:

Biomaterials Science
Polymer Chemistry
Synthetic Biology

Background:

Smart DNA hydrogels are gaining attention for their potential applications.
Current fabrication methods for DNA hydrogels face significant challenges, limiting their practical use.
There is a need for facile and tunable methods to produce functional DNA hydrogels.

Purpose of the Study:

To introduce a novel method for producing pH-responsive DNA hydrogels.
To demonstrate the utility of rolling circle amplification (RCA) in hydrogel fabrication.
To explore the tunability of hydrogel properties via template design.

Main Methods:

Utilizing rolling circle amplification (RCA) for DNA hydrogel synthesis.
Incorporating pH-sensitive cross-linking sites into DNA chains during synthesis.
Employing template-directed DNA synthesis to control sequence and properties.
Investigating hydrogel formation and pH-responsive behavior.

Main Results:

Successfully produced pH-responsive hydrogels using the novel RCA-based method.
Demonstrated that hydrogel properties can be finely tuned by modifying the DNA template.
Characterized the hydrogel formation process and its pH-responsiveness.

Conclusions:

The RCA-based approach offers a facile and tunable method for fabricating smart DNA hydrogels.
This technique overcomes limitations of existing methods, paving the way for practical applications.
Rational design of DNA templates enables precise control over hydrogel functionality.