Photothermal generation of microbubbles on plasmonic nanostructures inside microfluidic channels

Jingting Li; Ming Li; Greggy M. Santos; Fusheng Zhao; Wei-Chuan Shih

doi:10.1117/12.2213149

21 March 2016 Photothermal generation of microbubbles on plasmonic nanostructures inside microfluidic channels

Jingting Li, Ming Li, Greggy M. Santos, Fusheng Zhao, Wei-Chuan Shih

Proceedings Volume 9705, Microfluidics, BioMEMS, and Medical Microsystems XIV; 97050D (2016) https://doi.org/10.1117/12.2213149
Event: SPIE BiOS, 2016, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Jingting Li, Ming Li, Greggy M. Santos, Fusheng Zhao, and Wei-Chuan Shih "Photothermal generation of microbubbles on plasmonic nanostructures inside microfluidic channels", Proc. SPIE 9705, Microfluidics, BioMEMS, and Medical Microsystems XIV, 97050D (21 March 2016); https://doi.org/10.1117/12.2213149

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