Resonant osmosis across active switchable membranes
arXiv:2002.02931 · doi:10.1063/1.5138987
Abstract
To overcome the traditional paradigm of filtration, where separation is essentially performed upon steric sieving principles, we explore the concept of dynamic osmosis through active membranes. A partially permeable membrane presents a time-tuneable feature that changes the effective pore interaction with the solute and thus actively changes permeability with time. In general we find that slow flickering frequencies effectively decrease the osmotic pressure, and large flickering frequencies do not change it. In the presence of an asymmetric membrane, we find a resonant frequency where pumping of solute is performed and can be analyzed in terms of ratchet transport. We discuss and highlight the properties of this resonant osmotic transport. Furthermore, we show that dynamic osmosis allows to pump solute at the nanoscale using less energy than reverse osmosis. This opens new possibilities to build advanced filtration devices and design artificial ionic machinery.
References in corpus (14)
- Precise and ultrafast molecular sieving through graphene oxide membranes
- Size effect in ion transport through angstrom-scale slits
- Pressure is not a state function for generic active fluids
- Osmosis, from molecular insights to large-scale applications
- Targeted Assembly and Synchronization of Self-Spinning Microgears
- Scaling behavior for ionic transport and its fluctuations in individual carbon nanotubes
- Nonequilibrium equation of state in suspensions of active colloids
- Generalized Thermodynamics of Phase Equilibria in Scalar Active Matter
- Entropic Splitter for Particle Separation
- Ionic Coulomb blockade as a fractional Wien effect
- Osmotic and diffusio-osmotic flow generation at high solute concentration. I. Mechanical approaches
- Van't Hoff's law for active suspensions: the role of the solvent chemical potential
- Active sieving across driven nanopores for tunable selectivity
- Osmosis with active solutes