Low-temperature laser-stimulated controllable generation of micro-bubbles in a water suspension of absorptive colloid particles

O. V. Angelsky*, A. Ya Bekshaev, P. P. Maksimyak, A. P. Maksimyak, Steen Grüner Hanson

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

A method is described for the generation of micrometer-sized vapor-gas bubbles in a water suspension containing absorptive pigment nanoparticles. The diluted suspension (mean interparticle distance 20 mu m) absorbs the continuous laser radiation (wavelength 808 nm), and each particle in the best illuminated volume (similar to 10 x 10 x 200 mu m(3) ) serves as a bubble-nucleation center. The suspension heating is inessential (several degrees above the room temperature) and the bubbles are formed mainly of the air gases dissolved in water. The bubbles can stably exist within or near the illuminated area where their location is governed by the competition between thermal and optical forces and can be controlled via the laser beam parameters. The method enables controllable creation, support, prescribed transportation, and destruction of the bubbles. This can be useful in applications aimed at precise sorting, transportation, and delivery of species in nano-and micro-engineering as well as for biomedical studies. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
Original languageEnglish
JournalOptics Express
Volume26
Issue number11
Pages (from-to)13995-14009
ISSN1094-4087
DOIs
Publication statusPublished - 2018

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