Electrowetting movement of an aqueous droplet between two three-dimensional electrode surfaces

Dan Sun*, Hai-Qing Gong

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


In an effort to develop a novel electronic paper image display technology based on the electrowetting principle, a 3-D electrowetting cell is designed and fabricated, which consists of two 3-D bent electrodes, each having a horizontal surface made of gold and a vertical surface made of indium tin oxide (ITO) glass as a color display window, a layer of dielectric material on the 3-D electrodes, and a highly fluorinated hydrophobic layer on the surface of the dielectric layer. Results of this work show that an electrowetting-induced motion of an aqueous droplet in immiscible oils can be achieved reversibly across the boundary of the horizontal and vertical surfaces of the 3-D electrode surface. It is also shown that the droplet can maintain its wetting state on a vertical sidewall electrode free of a power supplier when the voltage is removed. This phenomenon may form the basis for color contrast modulation applications, where a power-free image display is required, such as electronic paper display technology in the future. (C) 2009 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3100201]

Original languageEnglish
Article number021104
Number of pages5
JournalJournal of micro-Nanolithography mems and moems
Issue number2
Publication statusPublished - 2009
Event4th Asia-Pacific Conference on Transducers and Micro-Nano Technologies - Tainan, United Kingdom
Duration: 01 Jun 2008 → …


  • electrowetting
  • electronic paper display
  • LENS


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