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Updated: Sep 16, 2025

DNA Origami-Mediated Substrate Nanopatterning of Inorganic Structures for Sensing Applications
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Ice nucleation by DNA origami.

Sarah A Alsalhi1,2, Jonathan Bath3, Andrew Turberfield3

  • 1Department of Physics, College of Science, Princess Nourah bint Abdulrahman University, Riyadh 11671, Saudi Arabia.

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|July 7, 2025
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Summary
This summary is machine-generated.

DNA origami structures were investigated for ice nucleation. Annealed DNA origami tiles showed consistent freezing rates, while unannealed DNA exhibited time-dependent freezing, suggesting aggregation forms efficient nucleators.

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Area of Science:

  • Nanotechnology
  • Biophysics
  • Materials Science

Background:

  • Ice nucleation is crucial in environmental science and cryobiology.
  • Well-defined model systems are needed for fundamental ice nucleation studies.
  • DNA origami offers precise nanoscale control over nucleating agent geometry.

Purpose of the Study:

  • To compare ice nucleation efficiency of annealed DNA origami tiles versus unannealed DNA components.
  • To investigate the effect of molecular conformation on ice nucleation.
  • To understand the role of DNA origami structure in ice formation.

Main Methods:

  • Utilized rectangular DNA origami tiles formed by annealing a DNA scaffold with staple oligonucleotides.
  • Compared ice nucleation in solutions of annealed tiles versus unannealed DNA mixtures.
  • Performed isothermal and slow temperature-ramp measurements on droplet arrays.

Main Results:

  • Molecular conformation significantly impacts ice nucleating efficiency.
  • Annealed DNA origami tiles exhibited constant freezing rates.
  • Unannealed DNA showed time-decreasing freezing rates, suggesting aggregation into highly efficient nucleating agents.

Conclusions:

  • DNA origami's conformational state critically influences ice nucleation.
  • Unannealed DNA's aggregation behavior leads to efficient, albeit sparse, ice nucleation.
  • This study highlights DNA origami as a versatile tool for probing ice nucleation mechanisms.