Microfluidic flow direction control using continuous-wave laser

A. Q. Jian; K. Zhang; Y. Wang; Shu Ping Lau; Yuen Hong Tsang; Xuming Zhang

doi:10.1016/j.sna.2012.02.002

Microfluidic flow direction control using continuous-wave laser

A. Q. Jian, K. Zhang, Y. Wang, Shu Ping Lau, Yuen Hong Tsang, Xuming Zhang

Research output: Journal article publication › Journal article › Academic research › peer-review

8 Citations (Scopus)

Abstract

This paper describes a selective control of the flow direction in microfluidic chips using a laser induced thermal bubble. The bubble is generated inside the microchannel by focusing a continuous-wave laser onto the tear-drop shaped metal pad underneath the microchannel. Experiments demonstrate that the unidirectionally growing bubble acts as an in-channel directional micro-pump and can drive the flow to a freely chosen direction at a T-junction by pumping at different locations. In addition, the pumping flow rate could be adjusted in the real time and this technology is applicable to many types of common liquids. These advantages make it useful for flexible microfluidic manipulation in lab-on-a-chip systems and microchannel networks.

Original language	English
Pages (from-to)	329-334
Number of pages	6
Journal	Sensors and Actuators, A: Physical
Volume	188
DOIs	https://doi.org/10.1016/j.sna.2012.02.002
Publication status	Published - 1 Dec 2012

Keywords

Laser cavitation
Micro-pump
Microfluidics
Thermal bubbles

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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10.1016/j.sna.2012.02.002

Cite this

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title = "Microfluidic flow direction control using continuous-wave laser",

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AU - Jian, A. Q.

AU - Zhang, K.

AU - Wang, Y.

AU - Lau, Shu Ping

AU - Tsang, Yuen Hong

AU - Zhang, Xuming

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AB - This paper describes a selective control of the flow direction in microfluidic chips using a laser induced thermal bubble. The bubble is generated inside the microchannel by focusing a continuous-wave laser onto the tear-drop shaped metal pad underneath the microchannel. Experiments demonstrate that the unidirectionally growing bubble acts as an in-channel directional micro-pump and can drive the flow to a freely chosen direction at a T-junction by pumping at different locations. In addition, the pumping flow rate could be adjusted in the real time and this technology is applicable to many types of common liquids. These advantages make it useful for flexible microfluidic manipulation in lab-on-a-chip systems and microchannel networks.

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KW - Thermal bubbles

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DO - 10.1016/j.sna.2012.02.002

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JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

ER -

Microfluidic flow direction control using continuous-wave laser

Abstract

Keywords

ASJC Scopus subject areas

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