Engineering and Technology

A catch bond mechanism with looped adhesive tethers for self-strengthening materials

K. C. Dansuk, S. Pal, et al.

Discover a groundbreaking molecular design that mimics catch bond behavior in nanoparticles, crafted by Kerim C. Dansuk, Subhadeep Pal, and Sinan Keten. This innovative approach facilitates load-sharing among tethers, mirroring experimental force-lifetime curve characteristics and paving the way for new self-strengthening materials.

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Playback language: English

Index

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

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