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Title: Photothermally controlled Marangoni flow around a micro bubble
Authors: Namura, Kyoko  kyouindb  KAKEN_id  orcid (unconfirmed)
Nakajima, Kaoru  kyouindb  KAKEN_id
Kimura, Kenji  kyouindb  KAKEN_id
Suzuki, Motofumi  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 名村, 今日子
Issue Date: 26-Jan-2015
Publisher: American Institute of Physics
Journal title: Applied Physics Letters
Volume: 106
Issue: 4
Thesis number: 043101
Abstract: We have experimentally investigated the control of Marangoni flow around a micro bubble using photothermal conversion. Using a focused laser spot acting as a highly localized heat source on Au nanoparticles/dielectric/Ag mirror thin film enables us to create a micro bubble and to control the temperature gradient around the bubble at a micrometer scale. When we irradiate the laser next to the bubble, a strong main flow towards the bubble and two symmetric rotation flows on either side of it develop. The shape of this rotation flow shows a significant transformation depending on the relative position of the bubble and the laser spot. Using this controllable rotation flow, we have demonstrated sorting of the polystyrene spheres with diameters of 2 μm and 0.75 μm according to their size.
Rights: Copyright 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics
DOI(Published Version): 10.1063/1.4906929
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