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Unusual multiscale mechanics of biomimetic nanoparticle hydrogels

Author

Listed:
  • Yunlong Zhou

    (School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University
    Chinese Academy of Sciences
    University of Michigan
    University of Michigan)

  • Pablo F. Damasceno

    (University of Michigan
    University of Michigan
    University of California)

  • Bagganahalli S. Somashekar

    (University of Michigan)

  • Michael Engel

    (University of Michigan
    University of Michigan
    Friedrich-Alexander-University Erlangen-Nurnberg)

  • Falin Tian

    (School of Ophthalmology and Optometry and Eye Hospital, Wenzhou Medical University)

  • Jian Zhu

    (University of Michigan
    University of Michigan)

  • Rui Huang

    (University of Michigan)

  • Kyle Johnson

    (University of Michigan)

  • Carl McIntyre

    (University of Michigan)

  • Kai Sun

    (University of Michigan)

  • Ming Yang

    (University of Michigan
    University of Michigan)

  • Peter F. Green

    (University of Michigan
    National Renewable Energy Laboratory)

  • Ayyalusamy Ramamoorthy

    (University of Michigan)

  • Sharon C. Glotzer

    (University of Michigan
    University of Michigan
    University of Michigan)

  • Nicholas A. Kotov

    (University of Michigan
    University of Michigan
    University of Michigan
    University of Michigan)

Abstract

Viscoelastic properties are central for gels and other materials. Simultaneously, high storage and loss moduli are difficult to attain due to their contrarian requirements to chemical structure. Biomimetic inorganic nanoparticles offer a promising toolbox for multiscale engineering of gel mechanics, but a conceptual framework for their molecular, nanoscale, mesoscale, and microscale engineering as viscoelastic materials is absent. Here we show nanoparticle gels with simultaneously high storage and loss moduli from CdTe nanoparticles. Viscoelastic figure of merit reaches 1.83 MPa exceeding that of comparable gels by 100–1000 times for glutathione-stabilized nanoparticles. The gels made from the smallest nanoparticles display the highest stiffness, which was attributed to the drastic change of GSH configurations when nanoparticles decrease in size. A computational model accounting for the difference in nanoparticle interactions for variable GSH configurations describes the unusual trends of nanoparticle gel viscoelasticity. These observations are generalizable to other NP gels interconnected by supramolecular interactions and lead to materials with high-load bearing abilities and energy dissipation needed for multiple technologies.

Suggested Citation

  • Yunlong Zhou & Pablo F. Damasceno & Bagganahalli S. Somashekar & Michael Engel & Falin Tian & Jian Zhu & Rui Huang & Kyle Johnson & Carl McIntyre & Kai Sun & Ming Yang & Peter F. Green & Ayyalusamy Ra, 2018. "Unusual multiscale mechanics of biomimetic nanoparticle hydrogels," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-017-02579-w
    DOI: 10.1038/s41467-017-02579-w
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    Cited by:

    1. Bowen Sui & Youliang Zhu & Xuemei Jiang & Yifan Wang & Niboqia Zhang & Zhongyuan Lu & Bai Yang & Yunfeng Li, 2023. "Recastable assemblies of carbon dots into mechanically robust macroscopic materials," Nature Communications, Nature, vol. 14(1), pages 1-12, December.

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