Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co3O4 nanoparticles |
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| Authors: | Ali Asghar Sadeghi Ghazvini Ehsan Taheri‐Nassaj Babak Raissi Reza Riahifar Maziar Sahba Yaghmaee |
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| Affiliation: | 1. Department of Materials Science and Engineering, Tarbiat Modares University, Tehran, Iran;2. Battery and Sensor Research Group, Materials and Energy Research Center, Karaj, Iran |
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| Abstract: | In this work, the parameters of cobalt oxide suspension such as conductivity, zeta potential, particle size, stability, and finally the electrophoretic behavior of particles in the absence and presence of polyethylenimine (PEI) in acetone medium were investigated. Also, the effects of washing on the stability and electrophoretic deposition of Co3O4 were studied. Characterization of the obtained layer by optical microscopy revealed that there was no deposition in the suspension without PEI, while a uniform layer was formed in the presence of PEI additive. Scanning electron microscopy (SEM) results confirmed the uniformity of layer obtained in acetone using PEI additive. Moreover, SEM results demonstrated that more porous microstructures were obtained at longer deposition durations. The difference in the porosity of the layers, as indicated by the SEM micrographs, is attributed to increase in the deposition time. |
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| Keywords: | cobalt/cobalt compounds electrophoretic deposition nanoparticles |
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