The effects of suspending medium on dielectrophoretic systems for separating and sorting carbon nanotubes

Document Type: Research Paper


1 University of Sistan and Baluchetan

2 Associate Professor of Chemical Engineering, Chemical Engineering Department Faculty of Engineering University of Isfahan


The separation of two different types of multi-walled carbon nanotubes is studied in a dielectrophoresis-based microchannel system in six different solvents as the suspending medium. A simple model is developed to predict the behavior of the multi-walled carbon nanotubes in the above mentioned system. The equations of motion for the multi-walled carbon nanotubes in that system are introduced. The effect of the suspending medium type on the fabrication parameters of dielectrophoretic system such as applied voltage and inter electrode gap is surveyed. The calculation indicates that the suspending medium has a direct influence on designing and optimization of the dielectrophoretic systems. The geometrical separation of the carbon nanotubes is considered here, and it is found that the model predicts some advantages in separation and sorting of the multi-walled carbon nanotubes based on their diameter.


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