4 papers
Self-Generated Electric Fields in Polyelectrolyte Gradients Increase Microparticle Transport
Max Huisman, Ali Azadbakht, Patrick B. Warren +1
There are many situations in nature and industry where small particles are exposed to gradients of charged polymers, such as enzymes in biological gradients of DNA or RNA, virus pa…
Simple models for the trapping of charged particles and macromolecules by diffusiophoresis in salt gradients
Richard P. Sear, Patrick B. Warren
We study the trapping of charged particles and macromolecules (such as DNA) in salt gradients in aqueous solutions. The source for the salt gradient can be as simple as a dissolvin…
Salt solutions with two or more salts generate ion currents analogous to magnetic field lines
Patrick B. Warren, Richard P. Sear
A gradient of a single salt in a solution generates an electric field, but not a current. Recent theoretical work by one of us [Phys. Rev. Lett. 24, 248004 (2020)] showed that the…
Colloidal diffusiophoresis in crossed electrolyte gradients: experimental demonstration of an 'action at a distance' effect predicted by the Nernst-Planck equations
Ian Williams, Patrick B. Warren, Richard P. Sear +1
In an externally imposed electrolyte (salt) concentration gradient, charged colloids drift at speeds of order one micrometre per second. This phenomenon is known as diffusiophoresi…