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Friday, December 19, 2014

Trapping of nanoparticles in a liquid by laser-induced microbubbles

V I Yusupov, S I Tsypina and V N Bagratashvili

Nanoparticles a few nanometers in diameter contained in a colloidal solution can be captured by the surface of a microbubble produced by a well-focused beam of a continuous wave visible laser. The concentration of the nanoparticles on the surface of the microbubble is found to gradually increase during the course of irradiation. The mechanism of such a trapping is associated with the laser-induced Marangoni convection developing in the vicinity of the microbubble as a result of the temperature gradient obtained at its surface.

DOI

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