Mechanical properties of model colloidal mono-crystals
Abstract
We investigate the elastic and yielding properties of two dimensional defect-free mono-crystals made of highly monodisperse droplets. Crystals are compressed between two parallel boundaries of which one acts as a force sensor. As the available space between boundaries is reduced, the crystal goes through successive row-reduction transitions. For small compression forces, the crystal responds elastically until a critical force is reached and the assembly fractures in a single catastrophic global event. Correspondingly there is a peak in the force measurement associated with each row-reduction. The elastic properties of ideal mono-crystal samples are fully captured by a simple analytical model consisting of an assembly of individual capillary springs. The yielding properties of the crystal are captured with a minimal bond breaking model.
Cite
@article{arxiv.2007.00917,
title = {Mechanical properties of model colloidal mono-crystals},
author = {Jean-Christophe Ono-Dit-Biot and Pierre Soulard and Solomon Barkley and Eric Weeks and Thomas Salez and Élie Raphaël and Kari Dalnoki-Veress},
journal= {arXiv preprint arXiv:2007.00917},
year = {2020}
}