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7 September 2018 Manipulation of photothermally generated microbubbles
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Generation and 3D manipulation of microbubbles by means of temperature gradients induced by low power laser radiation is presented. Photodeposited silver nanoparticles on the distal end of two optical fibers act as thermal sources after light absorption. The temperature rises above liquid evaporation temperature generating a microbubble at the optical fibers end in non-absorbent liquids. Alternatively, switching the thermal gradients between the fibers, it is possible to generate forces in opposite directions, causing the migration of microbubbles from one fiber optic tip to another. Marangoni force induced by surface tension gradients in the bubble wall is the driving force behind the manipulation of microbubbles
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R. Ramos-García, J. G. Ortega-Mendoza , J. A. Sarabia-Alonso, P. Zaca-Morán Sr., A. Padilla-Vivanco, C. Toxqui-Quitl, I. Rivas-Cambero, J. Ramírez Ramírez, and S. A. Torres Hurtado "Manipulation of photothermally generated microbubbles", Proc. SPIE 10723, Optical Trapping and Optical Micromanipulation XV, 107232R (7 September 2018);

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