Twin-plate electrowetting for efficient digital microfluidics

Jong Hyeon Chang, James Jungho Pak

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


This paper describes a twin-plate electrowetting configuration for efficient digital microfluidics. In the twin-plate configuration, the electrowetting force doubles compared to a standard two plate configuration because the chord length of the effective three-phase contact line increases 2-fold with the grounded liquid droplet. For the realization of a twin-plate electrowetting device, two identical ground-type single-plate devices were attached with a gap after aligning their control electrode arrays facing each other. As a result, the twin-plate electrowetting device showed significantly faster droplet velocity than that of the two-plate device, and the required voltage to obtain the same velocity reduced down to between 70% and 80% compared to that of the two-plate device.

Original languageEnglish
Pages (from-to)1581-1585
Number of pages5
JournalSensors and Actuators, B: Chemical
Issue number1
Publication statusPublished - 2011 Dec 15


  • Digital microfluidics
  • Electrowetting configurations
  • Electrowetting force
  • Low-voltage electrowetting
  • Twin-plate electrowetting

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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