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Related Experiment Video

Updated: Feb 15, 2026

A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis

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Published on: September 10, 2014

A Three-State System Based on Branched DNA Hybrids.

Shiliang He¹, Clemens Richert¹

¹Institut für Organische Chemie, Universität Stuttgart, 70569, Stuttgart, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)

|February 1, 2018

Summary

Researchers developed novel branched DNA hybrids capable of transitioning between three distinct states: solution, hydrogel, and solid. These smart materials respond to pH and divalent cations, offering tunable properties for advanced applications.

Keywords:

DNA hydrogels oligonucleotides smart materials solution-phase synthesis

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Area of Science:

Biomaterials Science
Supramolecular Chemistry
Nanotechnology

Background:

Developing responsive materials is crucial for advanced applications.
Existing DNA-based systems rarely exhibit transitions between three states under ambient conditions.

Purpose of the Study:

To synthesize and characterize novel branched DNA hybrids.
To investigate their ability to transition between multiple structural states.

Main Methods:

Solution-phase H-phosphonate-based synthesis of branched DNA hybrids.
pH-induced gelation and cation-induced condensation studies.
Characterization of structural transitions.

Main Results:

Branched DNA hybrids with eight oligodeoxycytidylate arms were successfully prepared.
These hybrids form hydrogels at pH 4-6 and condense into solids with divalent cations.
Three distinct states (solution, hydrogel, solid) were achieved at room temperature and ambient pressure.

Conclusions:

The synthesized DNA hybrids form a rare three-state responsive system.
Tunable assembly and gelation properties are observed based on arm length.
These DNA hybrids show potential for smart material applications.