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Preparation of DNA-crosslinked Polyacrylamide Hydrogels
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Orthogonal Dual-Triggered Shape-Memory DNA-Based Hydrogels.

Xu Yu1, Yuwei Hu1, Jason S Kahn1

  • 1Institute of Chemistry and the Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|August 5, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed DNA-based shape-memory hydrogels that can switch between solid and liquid states using orthogonal triggers. These advanced materials offer controllable shape recovery for diverse applications.

Keywords:
G-quadruplexYoung's moduluscircular dichroismi-motifpolymers

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Materials Engineering

Background:

  • Hydrogels are versatile materials with applications in drug delivery and tissue engineering.
  • Developing hydrogels with tunable properties, such as shape memory, is an active area of research.

Purpose of the Study:

  • To design and synthesize DNA-based shape-memory hydrogels with switchable shape recovery.
  • To investigate the use of orthogonal triggers for controlling hydrogel shape transitions.

Main Methods:

  • Fabrication of DNA/acrylamide hydrogels stabilized by DNA duplexes and responsive crosslinkers (i-motif or G-quadruplex).
  • Utilizing pH changes and metal ions (Ag+, Pb2+, Sr2+) or ligands (DOTA, KP) as orthogonal triggers to induce shape transitions.
  • Characterization of hydrogel properties and shape recovery behavior.

Main Results:

  • Demonstrated switchable shape recovery in two distinct DNA-based hydrogel systems.
  • Successfully controlled hydrogel shape transitions using orthogonal triggers like pH, metal ions, and ligands.
  • Achieved permanent shape-memory effects through stable DNA duplex crosslinks.

Conclusions:

  • DNA-based hydrogels offer a promising platform for creating advanced shape-memory materials.
  • Orthogonal trigger systems enable precise control over hydrogel shape recovery.
  • These materials hold potential for applications requiring dynamic and responsive structures.