Journal
MICROMACHINES
Volume 2, Issue 4, Pages 369-384Publisher
MDPI
DOI: 10.3390/mi2040369
Keywords
digital microfluidic; cross-referencing; bi-polar voltage; threshold voltage
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
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A 16 x 16 digital microfluidic multiplexer is demonstrated. The device makes use of dual-phase AC activation in a bi-layered electrode structure for actuating microdrops independently. A switching arrangement is employed to localize two out-of-phase AC waveforms in one overlapped region of the two-dimensional multiplexer grid. The superimposed AC waveforms overcome the threshold voltage for motion of a local microdrop. The demonstrated dual-phase activation and nonlinear threshold-based motion overcomes the previously-reported microdrop interference effect, as it successfully actuates individual microdrops in systems with multiple neighbouring microdrops. The device is demonstrated with an integrated centre-tap transformer using a 10.0 Vrms input voltage and minimal power consumption.
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