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Browsing by Author "Johnston, I. D."
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Continuously variable mixing-ratio micromixer with elastomer valves
Tan, C. K. L.; Tracey, M.C.; Davis, J. B.; Johnston, I. D. (2005-10)We report a self-contained microfluidic alternate flow injection mixer (AFIM) employing piezoelectrically actuated, PDMS seal-valves to control injection. AFIMs employ pulsatile injection of liquids to enhance interface ... -
Dual independent displacement-amplified micropumps with a single actuator
Tracey, M.C.; Johnston, I. D.; Davis, J. B.; Tan, C. K. L. (2006-08)We report a dual-micropump structure operated by a single actuator element. The constituent micropumps are a form of micro throttle pump (MTP) comprising a narrow flow channel incorporating two microthrottles. We term this ... -
Elastomer-glass micropump employing active throttles
Johnston, I. D.; Davis, J.B.; Richter, R.; Herbert, G. I.; Tracey, M.C. (2004)We report a reciprocating microfluidic pump, the Micro Throttle Pump (MTP), constructed in a relatively uncomplicated manner from glass and microstructured poly(dimethylsiloxane) (PDMS). Unconventionally, the MTP employs ... -
Micro throttle pump employing displacement amplification in an elastomeric substrate
Johnston, I. D.; Tracey, M.C.; Davis, J. B.; Tan, C. K. L. (2005-10)We report a micro throttle pump (MTP) with enhanced throttling resulting from beneficial deformation of its elastomer substrate. In the MTP reported, this has doubled the effective deflection of the piezo electric (PZT) ... -
Microfluidic solid phase suspension transport with an elastomer-based, single piezo-actuator, micro throttle pump
Johnston, I. D.; Tracey, M.C.; Davis, J. B.; Tan, C. K. L. (2005)We report a Micro Throttle Pump (MTP) which has been shown to pump 5 mm diameter polystyrene beads at a concentration of 4.5 x 10(7) beads ml(-1). This new MTP design is constructed in a straightforward manner and actuated ...