Co-deposition and electrokinetic behavior of TiO2–WO3 nanoparticles under non-uniform AC field

The electrokinetic behavior of TiO –WO nanoparticles while applying non-uniform AC electric fields at a frequency of 10 kHz was investigated using planar parallel electrodes. For this purpose, WO and TiO nanoparticles, which exhibited a different response to the applied electric field, were deposite...

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Published inInternational journal of materials research Vol. 110; no. 8; pp. 773 - 780
Main Authors Navidirad, Mahsa, Raissi, Babak, Riahifar, Reza, Yaghmaee, Maziar Sahba, Asil, Fatemeh Taati, Kazemzadeh, Asghar
Format Journal Article
LanguageEnglish
Published Stuttgart De Gruyter 12.08.2019
Carl Hanser Verlag
Subjects
AC electrophoresis
Concentric multi-shell
Deposition
Dielectrophoresis
Electric fields
Electrokinetics
Gas sensors
Nanoparticles
TiO
Titanium dioxide
Tungsten oxides
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Summary:The electrokinetic behavior of TiO –WO nanoparticles while applying non-uniform AC electric fields at a frequency of 10 kHz was investigated using planar parallel electrodes. For this purpose, WO and TiO 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 TiO nanoparticles, which were unable to enter the gap, moved toward it and got deposited there in the presence of WO nanoparticles. Hence, a composite layer consisting of TiO and WO nanoparticles was formed in the gap. A hypothesis for the change in the deposition and electric behavior of TiO nanoparticles is presented in this paper using the multi-shell model. Furthermore, a possible method for the fabrication of a TiO –WO based gas sensor has been provided.
ISSN:1862-5282
2195-8556
DOI:10.3139/146.111798