Towards rational design of power-law rheology via DNA nanostar networks Article Swipe

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Nathaniel Conrad , Omar A. Saleh , Deborah Kuchnir Fygenson ·

YOU? · · 2023 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2308.14699

We measure the rheology of transient hydrogels comprised of a single type of DNA nanostar that makes both strong and weak bonds. These gels exhibit power-law frequency-dependence of their storage and loss moduli, with scaling exponents that depend on the proportions of the two bonds. A diffusive stress-relaxation model, in which the strong-bond sub-network relieves stress by diffusing through an effective viscosity imposed by the weak bonds, explains the scaling of their moduli. The model has implications for the fractal dimensions of the strong-bond sub-network that are in good agreement with measurements and makes testable predictions for the viscoelasticity of other transient hydrogels. Overall, this work demonstrates the power of DNA nanotechnology to decipher, and potentially rationally design, power-law rheology.

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Rheology Viscoelasticity Power law Self-healing hydrogels Scaling Materials science Chemical physics Relaxation (psychology) Transient (computer programming) Viscosity Moduli Statistical physics Thermodynamics Physics Computer science Mathematics Composite material Polymer chemistry Quantum mechanics Geometry Psychology Statistics Operating system Social psychology

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2308.14699
PDF: https://arxiv.org/pdf/2308.14699
OA Status: green
Cited By: 3
Related Works: 10
OpenAlex ID: https://openalex.org/W4386273338

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DOI: https://doi.org/10.48550/arxiv.2308.14699

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Title: Towards rational design of power-law rheology via DNA nanostar networks

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Language: en

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Publication year: 2023

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Publication date: 2023-08-28

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Authors: Nathaniel Conrad, Omar A. Saleh, Deborah Kuchnir Fygenson

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Landing page: https://arxiv.org/abs/2308.14699

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Concepts: Rheology, Viscoelasticity, Power law, Self-healing hydrogels, Scaling, Materials science, Chemical physics, Relaxation (psychology), Transient (computer programming), Viscosity, Moduli, Statistical physics, Thermodynamics, Physics, Computer science, Mathematics, Composite material, Polymer chemistry, Quantum mechanics, Geometry, Psychology, Statistics, Operating system, Social psychology

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Cited by: 3

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Citations by year (recent): 2025: 1, 2024: 2

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Related works (count): 10

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