Abstract
Article history: This paper presents a disposable passive suction pump that uses the restoring force of an elastomeric chamber for liquid transportation in a microfluidic system. The proposed suction pump can be operated by finger pressure without any peripheral equipment. To adjust the generated suction pressure, five different displacements of the suction chamber ceiling, two different chamber shapes, and five different elastic moduli of the elastomer were considered. For a cylindrical chamber with a 5 mm height and 5 mm radius, the generated suction pressure and flow rate increased almost linearly up to about 31 kPa and 160.8 μL/min, respectively, depending on the chamber deformation. A maximum suction pressure of 42.9±0.7 kPa was obtained for a hemispherical chamber with a 2.1 mm height and 5 mm radius.
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