Effect of polyethylenimine addition and washing on stability and electrophoretic deposition of Co₃O₄ nanoparticles

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.

Nafion-Assisted Electrophoretic Deposition and Its Application in Bismuth Film Electrodes for Metal Ion Detection

“…The electrophoretic deposition (EPD) method has exhibited great potential in the fast and economical assembly of nanoparticles into corresponding functional coatings with the advantages of simplicity, low cost, easy control of the film thickness, and wide adoptability for complex shapes. − As a coating technology, EPD has the advantages of low cost, good coating morphology and wide applicability compared with other coating technologies commonly used in BFE design, such as drop casting, electrical deposition and thermal evaluation technology. In this work, we combined the advantages of EPD and Nafion to fabricate a series of Bi based coatings and carbon material coatings.…”