Roughness Induced Rotational Slowdown Near the Colloidal Glass Transition
arXiv:2012.11729 · doi:10.1016/j.jcis.2021.08.212
Abstract
Roughening the surface of spherical colloids can drastically change their translational and rotational dynamics in dense suspensions. Using 3D confocal microscopy, we show that roughness not only lowers the concentration of the translational colloidal glass transition, but also generates a broad concentration range in which the rotational Brownian motion changes signature from high-amplitude diffusive to low-amplitude rattling. This hitherto not reported second glass transition for rough spherical colloids emerges when the particle intersurface distance becomes comparable to the roughness length scale. Interlocking contacts are responsible for restricting the particle rotations.
References in corpus (12)
- Theoretical perspective on the glass transition and amorphous materials
- The Physics of the Colloidal Glass Transition
- Properties of cage rearrangements observed near the colloidal glass transition
- Jamming of frictional spheres and random loose packing
- Shear thickening of cornstarch suspensions as a re-entrant jamming transition
- Roughness-dependent tribology effects on discontinuous shear thickening
- Shear thickening and jamming of dense suspensions: the "roll" of friction
- An introduction to the colloidal glass transition
- Conching chocolate: A prototypical transition from frictionally jammed solid to flowable suspension with maximal solid content
- Orientationally Glassy Crystals of Janus Spheres
- Tracking Rotational Diffusion of Colloidal Clusters
- Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions
Cited by in corpus (6)
- How Surface Roughness Affects the Interparticle Interactions at a Liquid Interface
- Interaction of Active Janus Particles with Passive Tracers
- Glass Transition in Monolayers of Rough Colloidal Ellipsoids
- Decoupling of rotation and translation at the colloidal glass transition
- Attraction-enhanced emergence of friction in colloidal matter
- Hydrodynamic Origin of Friction Between Suspended Rough Particles