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Rotational microfluidic motor for on-chip microcentrifugation

  • Author(s): Shilton, RJ;
  • Glass, NR;
  • Chan, P;
  • Yeo, LY;
  • Friend, JR
  • et al.

Published Web Location

https://doi.org/10.1063/1.3600775
Abstract

We report on the design of a surface acoustic wave (SAW) driven fluid-coupled micromotor which runs at high rotational velocities. A pair of opposing SAWs generated on a lithium niobate substrate are each obliquely passed into either side of a fluid drop to drive rotation of the fluid, and the thin circular disk set on the drop. Using water for the drop, a 5 mm diameter disk was driven with rotation speeds and start-up torques up to 2250 rpm and 60 nN m, respectively. Most importantly for lab-on-a-chip applications, radial accelerations of 172 m/ s2 was obtained, presenting possibilities for microcentrifugation, flow sequencing, assays, and cell culturing in truly microscale lab-on-a-chip devices. © 2011 American Institute of Physics.

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