Colloid Separation by CO2-Induced Diffusiophoresis
Abstract
We present a microfluidic crossflow separation of colloids enabled by the dissolution of CO2 gas in aqueous suspensions. The dissolved CO2 dissociates into H+ and HCO3- ions, which are efficient candidates for electrolytic diffusiophoresis, because of the fast diffusion of protons. By exposing CO2 gas to one side of a microfluidic flow channel, a crossflow gradient can be created, enabling the crossflow diffusiophoresis of suspended particles....
Paper Details
Title
Colloid Separation by CO2-Induced Diffusiophoresis
Published Date
Dec 20, 2019
Journal
Volume
36
Issue
25
Pages
7032 - 7038
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