To refer to this page use:
|Abstract:||We report an experimental study on the manipulation of colloidal particles in a drop sitting on a hydrogel. The manipulation is achieved by diffusiophoresis, which describes a directed motion of particles induced by solute gradients. By letting the solute concentrations for the drop and the hydrogel be different, we control the motion of particles in a stable suspension, which is otherwise difficult to achieve. We show that diffusiophoresis can cause the particles to move either toward or away from the liquid-air interface depending on the direction of the solute gradient and the surface charge of the particles. We measure the particle adsorption experimentally and rationalize the results with a one-dimensional numerical model. We show that diffusiophoretic motion is significant at the lengthscale of a drop deposited on a hydrogel, which suggests a simple method for the deposition of particles on hydrogels.|
|Citation:||Boulogne, F, Shin, S, Dervaux, J, Limat, L, Stone, HA. (2017). Diffusiophoretic manipulation of particles in a drop deposited on a hydrogel. Soft Matter, 13 (5122 - 5129. doi:10.1039/c7sm00915a|
|Pages:||5122 - 5129|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||Soft Matter|
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.