Total Internal Reflection Velocimetry

Huang P, Breuer KS (2007) Direct measurement of anisotropic, near-wall hindered diffusion using total internal reflection velocimetry. Phys Rev E 76 046307... 

Total internal reflection velocimetry combines evanescent-wave microscopy with established micro- and nanoscale velocimetry techniques. 

Huang P, Guasto JS, Breuer KS (2006) Direct measurement of slip velocities using three-dimensional total internal reflection velocimetry. J Fluid Meehan 566 447 64... 

Total internal reflection velocimetry combines evanescent wave microscopy with established mirco- and nano-scale velocimetry techniques. Particle image velocimetry or particle tracking velocimetry are used to infer fluid velocities... 

In micro- and nanoscale fluid mechanics, measurements of mass transport and fluid velocity are used to probe fundamental physical phenomena and evaluate the performance of microfluidic devices. Evanescent wave illumination has been combined with several other diagnostic techniques to make such measurements within a few hundred nanometers of fluid—solid interfaces with a resolution as small as several nanometers. Laser Doppler velocimetry has been applied to measure single-point tracer particle velocities in the boundary layer of a fluid within 1 pm of a wall. By seeding fluid with fluorescent dye, total internal reflection fluorescence recovery after photobleaching (FRAP) has been used to measure near-wall diffusion coefficients and velocity (for a summary of early applications, see Zettner and Yoda [2]). 

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