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Proceedings Paper

Photothermal generation of microbubbles on plasmonic nanostructures inside microfluidic channels
Author(s): Jingting Li; Ming Li; Greggy M. Santos; Fusheng Zhao; Wei-Chuan Shih
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Paper Abstract

Microbubbles have been utilized as micro-pumps, micro-mixers, micro-valves, micro-robots and surface cleaners. Various generation techniques can be found in the literature, including resistive heating, hydrodynamic methods, illuminating patterned metal films and noble metal nanoparticles of Au or Ag. We present photothermal microbubble generation by irradiating nanoporous gold disk covered microfluidic channels. The size of the microbubble can be controlled by adjusting the laser power. The dynamics of both bubble growth and shrinkage are studied. The advantages of this technique are flexible bubble generation locations, long bubble lifetimes, no need for light-adsorbing dyes, high controllability over bubble size, low power consumption, etc. This technique has the potential to provide new flow control functions in microfluidic devices.

Paper Details

Date Published: 21 March 2016
PDF: 5 pages
Proc. SPIE 9705, Microfluidics, BioMEMS, and Medical Microsystems XIV, 97050D (21 March 2016); doi: 10.1117/12.2213149
Show Author Affiliations
Jingting Li, Univ. of Houston (United States)
Ming Li, Univ. of Houston (United States)
Greggy M. Santos, Univ. of Houston (United States)
Fusheng Zhao, Univ. of Houston (United States)
Wei-Chuan Shih, Univ. of Houston (United States)

Published in SPIE Proceedings Vol. 9705:
Microfluidics, BioMEMS, and Medical Microsystems XIV
Bonnie L. Gray; Holger Becker, Editor(s)

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