Cooperative Suction by Vertical Capillary Array Pump for Controlling Flow Profiles of Microfluidic Sensor Chips
Autor: | Emi Tamechika, Suzuyo Inoue, Michiko Seyama, Tsutomu Horiuchi, Katsuyoshi Hayashi |
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Jazyk: | angličtina |
Rok vydání: | 2012 |
Předmět: | |
Zdroj: | Sensors, Vol 12, Iss 10, Pp 14053-14067 (2012) |
Druh dokumentu: | article |
ISSN: | 1424-8220 |
DOI: | 10.3390/s121014053 |
Popis: | 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. |
Databáze: | Directory of Open Access Journals |
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