Christabel K L Tan et al 2005 J. Micromech. Microeng. 15 1885 doi:10.1088/0960-1317/15/10/014
Christabel K L Tan, Mark C Tracey, John B Davis and Ian D Johnston
Show affiliationsWe 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 surface generation. By allowing control of pulse-volume proportionality by variation of the duty-cycle of the valve control signals, continuously variable ratio mixing is achieved without external fluid control components. Mixing is discussed in the context of 'rate of new surface generation', thus allowing comparison with laminating mixer designs. The prototype mixer employs a simple micromould fabrication technique to minimize reversible elastomer valve-seal adhesion and hence allow correct valve operation. The resulting device has been characterized over a range of mixing ratios.
85.50.-n Dielectric, ferroelectric, and piezoelectric devices
Issue 10 (October 2005)
Received 14 December 2004, in final form 22 July 2005
Published 19 August 2005
Christabel K L Tan et al 2005 J. Micromech. Microeng. 15 1885
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