Anomalous electrorheological behavior of ZnO nanowires

Feng, P.; Wan, Q.; Fu, X. Q.; Wang, T. H.; Tian, Y.
July 2005
Applied Physics Letters;7/18/2005, Vol. 87 Issue 3, p033114
Academic Journal
We observe an anomalous electrorheological (ER) behavior of suspensions composed of ZnO nanowires and silicone oil. In contrast to the usual ER behavior, a decrease in viscosity of the suspensions is observed. Such an anomalous behavior results from the migration of ZnO nanowires to the electrodes under a dc electric field. The migration leads to a relatively pure silicone oil zone between the electrodes, as confirmed by optical microscope observations. The occurrence of the electrophoresis is proposed as the origin of the decrease in shear stress.


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