Diffusiophoresis in the presence of a pH gradient
Suin Shim, Janine K. Nunes, Guang Chen, Howard A. Stone
Abstract
Diffusiophoretic motion of particles is influenced by the pH of surrounding liquid, due to the varying zeta potential of surfaces at different pH. By using the particles with an isoelectric point (pI), we study pH-dependent diffusiophoresis under a pH gradient. Various particle behaviors in the absence and presence of wall diffusioosmosis are demonstrated using a dead-end pore geometry.
Topics & Concepts
Isoelectric pointConcentration gradientParticle (ecology)ChemistryZeta potentialChemical physicsMechanicsBiophysicsPhysicsChromatographyMaterials scienceNanotechnologyGeologyBiochemistryBiologyNanoparticleEnzymeOceanographyElectrostatics and Colloid InteractionsMicrofluidic and Bio-sensing TechnologiesNanopore and Nanochannel Transport Studies