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Multi-domain automated patterning of DNA-functionalized hydrogels.

Moshe Rubanov1, Joshua Cole1, Heon-Joon Lee2

  • 1Department of Chemical and Biomolecular Engineering, Whiting School of Engineering, Johns Hopkins University, Baltimore, Maryland, United States of America.

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Researchers developed a novel platform for automatically fabricating multi-domain DNA-functionalized hydrogels at the micron scale. This technology enables precise programming of hydrogel shape and fluorescence for advanced molecular sensing applications.

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Area of Science:

  • Biomaterials Engineering
  • Nanotechnology
  • Molecular Biology

Background:

  • DNA-functionalized hydrogels can sense molecules and change shape/fluorescence.
  • Multi-domain hydrogels offer enhanced sensing capabilities but are challenging to fabricate.
  • Automated fabrication of complex, multi-domain hydrogels is needed.

Purpose of the Study:

  • To present a new automated platform for fabricating multi-domain DNA-functionalized hydrogels.
  • To enable programming of hydrogel material properties like shape and fluorescence.
  • To facilitate the construction of hydrogel architectures with numerous distinct domains.

Main Methods:

  • Developed an automated micro-scale fabrication platform.
  • Coupled reaction and diffusion processes to program material behavior.
  • Utilized low ink volumes (50 μL) for fabrication.

Main Results:

  • Successfully fabricated DNA-functionalized hydrogel architectures with domain sizes as small as 10 microns.
  • Created hydrogels with up to 4 different domain types.
  • Demonstrated DNA sequence hybridization and DNA sequence-induced shape change in fabricated hydrogels.

Conclusions:

  • The automated platform enables precise fabrication of complex DNA-functionalized hydrogel architectures.
  • These hydrogels exhibit responsive behavior similar to conventionally fabricated ones.
  • The technology holds promise for advanced molecular sensing and programmable materials.