184 citations · 1.5k across the 52 of their papers we have counts for
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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…
How effective are face coverings in reducing transmission of COVID-19?
Joshua F. Robinson, Ioatzin Rios de Anda, Fergus J. Moore +5
In the COVID-19 pandemic, billions are wearing face masks, in both health care settings and in public. Which type of mask we should wear in what situation, is therefore important.…
Efficacy of face coverings in reducing transmission of COVID-19: calculations based on models of droplet capture
Joshua F. Robinson, Ioatzin Rios de Anda, Fergus J. Moore +3
In the COVID--19 pandemic, among the more controversial issues is the use of masks and face coverings. Much of the concern boils down to the question -- just how effective are face…
Stratification of mixtures in evaporating liquid films occurs only for a range of volume fractions of the smaller component
Richard P Sear
I model the drying of a liquid film containing small and big colloid particles. Fortini et al. [A. Fortini et al, Phys. Rev. Lett. 116, 118301 (2016)] studied these films with both…