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Journal of Micro/Nanolithography, MEMS, and MOEMS

Electrowetting movement of an aqueous droplet between two three-dimensional electrode surfaces
Author(s): Dan Sun; Hai-Qing Thomas Gong
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Paper Abstract

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.

Paper Details

Date Published: 1 April 2009
PDF: 5 pages
J. Micro/Nanolith. MEMS MOEMS 8(2) 021104 doi: 10.1117/1.3100201
Published in: Journal of Micro/Nanolithography, MEMS, and MOEMS Volume 8, Issue 2
Show Author Affiliations
Dan Sun, Univ. of Southampton (United Kingdom)
Hai-Qing Thomas Gong, Nanyang Technological Univ. (Singapore)

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