Controlled Optofluidic Crystallization of Colloids Tethered at Interfaces
Soft Condensed Matter
2020-08-07 v2 Statistical Mechanics
Abstract
We report experiments that show rapid crystallization of colloids tethered to an oil-water interface in response to laser illumination. This light-induced transition is due to a combination of long-ranged thermophoretic pumping and local optical binding. We show that the flow-induced force on the colloids can be described as the gradient of a potential. The nonequilibrium steady state due to local heating thus admits an effective equilibrium description. The optofluidic manipulation explored in this work opens novel ways to manipulate and assemble colloidal particles
Cite
@article{arxiv.2003.04284,
title = {Controlled Optofluidic Crystallization of Colloids Tethered at Interfaces},
author = {Alessio Caciagli and Rajesh Singh and Darshana Joshi and R. Adhikari and Erika Eiser},
journal= {arXiv preprint arXiv:2003.04284},
year = {2020}
}
Comments
Published version