Cooperative suction by vertical capillary array pump for controlling flow profiles of microfluidic sensor chips

A passive pump consisting of integrated vertical capillaries has been developed for a microfluidic chip as an useful component with an excellent flow volume and flow rate. A fluidic chip built into a passive pump was used by connecting the bottoms of all the capillaries to a top surface consisting o...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2012-10, Vol.12 (10), p.14053-14067
Main Authors: Horiuchi, Tsutomu, Hayashi, Katsuyoshi, Seyama, Michiko, Inoue, Suzuyo, Tamechika, Emi
Format: Article
Language:English
Subjects:
Adhesives
Aqueous solutions
Biosensing Techniques - instrumentation
Biosensing Techniques - methods
Blood vessels
Capillarity
capillary
Capillary Action
Channels
Chips
Computer Simulation
Contact angle
Equipment Design
Flow rate
Lasers
Microarray Analysis - instrumentation
Microfluidic Analytical Techniques - instrumentation
Microfluidic Analytical Techniques - methods
Microfluidics
Microtechnology
passive pump
Pumps
Sensors
Simulation
Suction
Thin films
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Summary:A passive pump consisting of integrated vertical capillaries has been developed for a microfluidic chip as an useful component with an excellent flow volume and flow rate. A fluidic chip built into a passive pump was used by connecting the bottoms of all the capillaries to a top surface consisting of a thin layer channel in the microfluidic chip where the thin layer channel depth was smaller than the capillary radius. As a result the vertical capillaries drew fluid cooperatively rather than independently, thus exerting the maximum suction efficiency at every instance. This meant that a flow rate was realized that exhibited little variation and without any external power or operation. A microfluidic chip built into this passive pump had the ability to achieve a quasi-steady rather than a rapidly decreasing flow rate, which is a universal flow characteristic in an ordinary capillary.
ISSN:1424-8220
1424-8220
DOI:10.3390/s121014053