Abstract
We discuss the electrochemical formation of metal oxide films as candidate materials for the primary dielectric layer in electrowetting-on-dielectric (EWOD) systems. The ability to produce significant contact angle reduction at low voltage requires thin (<100nm), high dielectric strength films that also exhibit a high breakdown field; these requirements are met in a wide variety of metal oxides. A detailed understanding of materials as well as electronic and ionic transport in dielectrics are essential for the development and performance enhancement of these devices; we describe the process of oxides in film formation, the peculiar defect structure, electrical transport processes, as well as degradation and breakdown. Additionally, examples of low-voltage EWOD systems based on oxide/hydrophobic bilayers are discussed along with current efforts to improve performance of the metal oxide layers.
Keywords: Anodization, dielectric breakdown, dielectric conduction, electrowetting, metal oxides.
Current Nanoscience
Title:Anodic Metal Oxides for Electrowetting Systems
Volume: 11 Issue: 3
Author(s): M. Mibus, X. Hu, C. Knospe, M.L. Reed and G. Zangari
Affiliation:
Keywords: Anodization, dielectric breakdown, dielectric conduction, electrowetting, metal oxides.
Abstract: We discuss the electrochemical formation of metal oxide films as candidate materials for the primary dielectric layer in electrowetting-on-dielectric (EWOD) systems. The ability to produce significant contact angle reduction at low voltage requires thin (<100nm), high dielectric strength films that also exhibit a high breakdown field; these requirements are met in a wide variety of metal oxides. A detailed understanding of materials as well as electronic and ionic transport in dielectrics are essential for the development and performance enhancement of these devices; we describe the process of oxides in film formation, the peculiar defect structure, electrical transport processes, as well as degradation and breakdown. Additionally, examples of low-voltage EWOD systems based on oxide/hydrophobic bilayers are discussed along with current efforts to improve performance of the metal oxide layers.
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Cite this article as:
Mibus M., Hu X., Knospe C., Reed M.L. and Zangari G., Anodic Metal Oxides for Electrowetting Systems, Current Nanoscience 2015; 11 (3) . https://dx.doi.org/10.2174/1573413711666150213000518
DOI https://dx.doi.org/10.2174/1573413711666150213000518 |
Print ISSN 1573-4137 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-6786 |
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