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Microfluidic & nanofluidic technologies for chemistry, physics, biology, and bioengineering
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Communication
Lab Chip, 2008, 8, 1879 - 1882, DOI: 10.1039/b810787d
Electrokinetic patterning of colloidal particles with optical landscapes
Stuart J. Williams, Aloke Kumar and Steven T. Wereley
We demonstrate an opto-electrokinetic technique for non-invasive particle manipulation on the surface of a parallel-plate indium tin oxide (ITO) electrode that is biased with an alternating current (AC) signal and illuminated with near-infrared (1064 nm) optical landscapes. This technique can generate strong microfluidic vortices at higher AC frequencies (>100 kHz) and dynamically and rapidly aggregate and pattern particle groups at low frequencies (<100 kHz).
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