Thursday, June 6, 2013

Particle Manipulation Based on Optically Controlled Free Surface Hydrodynamics

Subramanyan Namboodiri Varanakkottu‡, Dr. Sajan Daniel George, Dr. Tobias Baier, Prof. Steffen Hardt, Martina Ewald, Prof. Markus Biesalski

Microparticle manipulation: The photoisomerization of surfactants adsorbed at a gas–liquid interface drives a Marangoni flow that can be used for the trapping and manipulation of small particles. By switching the laser wavelength, a flow either into or away from the focal spot can be induced. The picture shows a microparticle trapped in the focal region by the inflow.
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