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Nonlinear Dual-Phase Multiplexing in Digital Microfluidic Architectures
School of Engineering, University of British Columbia, Kelowna, BC V1V1V7, Canada
* Author to whom correspondence should be addressed.
Received: 17 August 2011; in revised form: 20 September 2011 / Accepted: 20 September 2011 / Published: 28 September 2011
Abstract: A 16 × 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.
Keywords: digital microfluidic; cross-referencing; bi-polar voltage; threshold voltage
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MDPI and ACS Style
Collier, C.M.; Wiltshire, M.; Nichols, J.; Born, B.; Landry, E.L.; Holzman, J.F. Nonlinear Dual-Phase Multiplexing in Digital Microfluidic Architectures. Micromachines 2011, 2, 369-384.
Collier CM, Wiltshire M, Nichols J, Born B, Landry EL, Holzman JF. Nonlinear Dual-Phase Multiplexing in Digital Microfluidic Architectures. Micromachines. 2011; 2(4):369-384.
Collier, Christopher M.; Wiltshire, Michael; Nichols, Jacqueline; Born, Brandon; Landry, Emily L.; Holzman, Jonathan F. 2011. "Nonlinear Dual-Phase Multiplexing in Digital Microfluidic Architectures." Micromachines 2, no. 4: 369-384.