Abstract
AbstractThe electrokinetic behavior of TiO2–WO3 nanoparticles while applying non-uniform AC electric fields at a frequency of 10 kHz was investigated using planar parallel electrodes. For this purpose, WO3 and TiO2 nanoparticles, which exhibited a different response to the applied electric field, were deposited simultaneously at 10 kHz. Characterization of the obtained patterns by optical and scanning electron microscopy revealed that the TiO2 nanoparticles, which were unable to enter the gap, moved toward it and got deposited there in the presence of WO3 nanoparticles. Hence, a composite layer consisting of TiO2 and WO3 nanoparticles was formed in the gap. A hypothesis for the change in the deposition and electric behavior of TiO2 nanoparticles is presented in this paper using the multi-shell model. Furthermore, a possible method for the fabrication of a TiO2–WO3based gas sensor has been provided.
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