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1 April 2009 Electrowetting movement of an aqueous droplet between two three-dimensional electrode surfaces
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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.
©(2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Dan Sun and Hai-Qing Thomas Gong "Electrowetting movement of an aqueous droplet between two three-dimensional electrode surfaces," Journal of Micro/Nanolithography, MEMS, and MOEMS 8(2), 021104 (1 April 2009).
Published: 1 April 2009

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