Diffusiophoretic manipulation of particles in a drop deposited on a hydrogel
| Autor: | Sangwoo Shin, Laurent Limat, François Boulogne, Julien Dervaux, Howard A. Stone |
|---|---|
| Přispěvatelé: | Laboratoire de Physique des Solides (LPS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Matière et Systèmes Complexes (MSC (UMR_7057)), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physique et mécanique des milieux hétérogenes (PMMH), Centre National de la Recherche Scientifique (CNRS)-ESPCI ParisTech-Université Paris Diderot - Paris 7 (UPD7)-Université Pierre et Marie Curie - Paris 6 (UPMC), Department of Mechanical and Aerospace Engineering [Princeton] (MAE), Princeton University, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Physique et mécanique des milieux hétérogenes (UMR 7636) (PMMH), Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
[PHYS.PHYS.PHYS-FLU-DYN]Physics [physics]/Physics [physics]/Fluid Dynamics [physics.flu-dyn]
Materials science Drop (liquid) Particle adsorption FOS: Physical sciences 02 engineering and technology General Chemistry Condensed Matter - Soft Condensed Matter 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Condensed Matter::Soft Condensed Matter Chemical physics Colloidal particle Diffusiophoresis 0103 physical sciences Self-healing hydrogels Soft Condensed Matter (cond-mat.soft) Surface charge 010306 general physics 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Soft Matter Soft Matter, Royal Society of Chemistry, 2017, 13 (30), pp.5122-5129. ⟨10.1039/C7SM00915A⟩ |
| ISSN: | 1744-683X 1744-6848 |
| DOI: | 10.1039/C7SM00915A⟩ |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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