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Abstract
This paper presents a molecular design that recapitulates catch bond behavior between nanoparticles tethered with macromolecules, consisting of one looped and one straight tether linking particles with weak adhesion. The loop stiffness is calibrated such that it opens around a target force to enable load-sharing among tethers, facilitating a sequential to coordinated failure transition that reproduces experimental catch bond force-lifetime curve characteristics. An analytical relation, validated by molecular simulations, demonstrates that loop and adhesion interactions can be tailored to achieve a spectrum of catch bond lifetime curves. This design opens new avenues for creating tunable, catch-bond-inspired self-strengthening materials.
Publisher
Communications Materials
Published On
Aug 14, 2023
Authors
Kerim C. Dansuk, Subhadeep Pal, Sinan Keten
Tags
molecular design
catch bond
nanoparticles
macromolecules
self-strengthening materials
adhesion
load-sharing

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