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Low-Frequency Electrophoretic Deposition of ZnO Nanoparticles: Effect of Organic Medium on Deposition Pattern

Authors


  • R. Moreno—contributing editor

†Author to whom correspondence should be addressed. e-mail: ehsan327@yahoo.com, em13@merc.ac.ir

Abstract

In present study, using coplanar gold electrodes, the effect of two organic media, acetone and isopropanol, on the low-frequency electrophoretic deposition pattern of ZnO nanoparticles at 1 Hz was investigated. Optical and scanning electron microscopy indicate the formation of microcracks across the layer deposited in acetone. In contrast, the alternating electrophoretic deposition of ZnO nanoparticles from an isopropanol-based suspension lead to the formation of a uniform deposit connecting the two electrode edges. This evident difference in deposition pattern was attributed to suspension parameters such as viscosity, conductivity, particle size distribution, and diffusion coefficient.

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