Microfluidic and Nanofluidic Transport

Microfluidic devices are characterized by channels with diameters ranging roughly between 100 nm and 100 microns, often involving particles with diameters ranging roughly from 10 nm to 10 microns. At these length scales, the Reynolds number is low and the flow is usually laminar, but the mass transfer Peclet number is often large, leading to unique microfluidic mixing regimes. Because the diameters are small and it is difficult to generate large flow velocities with pressure, other effects can dominate. In particular, electrokinetic effects (electroosmosis and electrophoresis) can dominate and voltage can be used to manipulate fluids, molecules, and particles. A variety of chemical separations have been developed in microfluidic devices owing to the beneficial species transport often associated with microchip devices. Surface tension can also be very important, and bubbles and drops can often be manipulated with temperature and electric fields. Study of nanofluidic phenomena can occur indirectly via interface studies, nanoporous material, or nanometer-scale microdevices.

Archival Microfluidics Publications

Microfluidics Presentations

Figure Gallery

A selection of figures from relevant publications are below.  Click to open a carousel view.  Links to the original manuscript are in the captions.