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Designing a Bio-responsive Robot from DNA Origami
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Programming gel automata shapes using DNA instructions.

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  • 1Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, USA.

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Researchers developed programmable gel automata that change shape on demand using DNA instructions. These materials offer a new way to design shape-shifting robots and smart materials without external devices.

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Area of Science:

  • Robotics and Materials Science
  • Biomolecular Engineering
  • Soft Matter Physics

Background:

  • Transforming matter into various shapes without external devices is a significant challenge in robotics and materials design.
  • Biological systems utilize biomolecules for shape transformation and localized changes.

Purpose of the Study:

  • To introduce gel automata capable of transforming into numerous prescribed shapes.
  • To demonstrate shape transformation in response to a library of biomolecular instructions.

Main Methods:

  • Fabrication of centimeter-scale gel automata with multiple micro-segments using photolithography.
  • Design of DNA activator sequences to control reversible growth and shrinking of micro-segments.
  • Utilizing simulations and neural networks to guide the design and evaluation of gel automata.

Main Results:

  • Developed DNA activator designs maximizing segment growth and shrinking.
  • Created gel automata capable of reversible transformations into distinct shapes, including letters and numerals.
  • Demonstrated sequential and repeated shape metamorphosis.

Conclusions:

  • Gel automata can be digitally programmed and reprogrammed using information-bearing chemical signals.
  • This work presents a novel approach for creating programmable soft materials and robots.
  • Highlights the potential of biomolecularly controlled shape-shifting materials.