Artículo
Electrorotation of semiconducting microspheres
Autor/es | Rodríguez Sánchez, Laida
Ramos Reyes, Antonio García Sánchez, Pablo |
Departamento | Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo |
Fecha de publicación | 2019 |
Fecha de depósito | 2019-11-28 |
Publicado en |
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Resumen | We study experimentally the electrorotation (ROT) of semiconducting microspheres. ZnO microspheres obtained by a hydrothermal synthesis method are dispersed in KCl aqueous solutions and subjected to rotating electric fields. ... We study experimentally the electrorotation (ROT) of semiconducting microspheres. ZnO microspheres obtained by a hydrothermal synthesis method are dispersed in KCl aqueous solutions and subjected to rotating electric fields. Two ROT peaks are found in experiments: a counterfield peak and a cofield peak at somewhat higher frequencies. These observations are in accordance with recent theoretical predictions for semiconducting spheres. The counterfield rotation is originated by the charging of the electrical double layer at the particle-electrolyte interface, while the cofield rotation is due to the Maxwell-Wagner relaxation. Additionally, we also found that some microspheres in the sample behaved differently and only showed counterfield rotation. We show that the behavior of these particles can be described by the so-called shell model. The microstructure of the microspheres is analyzed with electron microscope techniques and related to the ROT measurements. |
Identificador del proyecto | PGC2018-099217-B-I00
PEJUS-2 |
Cita | Rodríguez Sánchez, L., Ramos Reyes, A. y García Sánchez, P. (2019). Electrorotation of semiconducting microspheres. Physical Review E, 100 (1-4, 042616), 1-8. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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pubPhysRevE.100.042616.pdf | 1.702Mb | [PDF] | Ver/ | |