Steady-State 3D Trapping and Manipulation of Microbubbles Using Thermocapillary

• DOI: 10.3389/fphy.2020.585590
• Publication Date: 2020-11-13T14:16:26Z
• Authors: F. M. Muñoz-Pérez; J. G. Ortega-Mendoza; A. Padilla-Vivanco; C. Toxqui-Quitl; J. A. Sarabia-Alonso; R. Ramos-García
• Keywords: Tweezers

An experimental and theoretical study on the 3D trapping manipulation of microbubbles by means low power laser-induced temperature gradients induced in ethanol bulk light absorption (λ = 1550 nm) is presented. Two optical fibers were used: One for bubble generation (OFG) other both (OFT). Light from a Q-switched pulsed laser (λ=532 nm & pulse width τp=5 ns) propagates fiber OFG gets absorbed at silver nanoparticles (AgNPs), previously photodeposed, distal end optic core, generating microbubbles. In OFT, CW was used to trap manipulate bubbles thermocapillary ethanol. The microbubble generated migrates towards OFT. equilibrium between buoyancy force FB, drag FD Marangoni (also known as force) FM gives rise stably best time our knowledge.