Pneumatic flow switching on centrifugal microfluidic platforms in motion |
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Authors: | Kong Matthew C R Salin Eric D |
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Affiliation: | Department of Chemistry, McGill University, Montreal, Quebec, Canada. |
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Abstract: | This paper describes a flow switching technique applicable to centrifugal microfluidic platforms, using a regulated stream of compressed gas. This pneumatic flow switching technique allows for flow control at a T-shaped junction between one inlet channel and two outlet channels. This technique provides a noncontact, robust, and efficient method for switching the direction of fluid flow while a disk is rotating at relatively low frequencies. The switching operation can be implemented reproducibly with applied gas flow rates between 17 and 58 L min(-1) and rotational frequencies between 400 rpm (6.6 Hz) and 1200 rpm (20 Hz). |
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