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Ionic effects on the electric field needed to orient dielectric lamellae G. Garbs Putzel,1,a
 

Summary: Ionic effects on the electric field needed to orient dielectric lamellae
G. Garbès Putzel,1,a
David Andelman,2
Yoav Tsori,3
and M. Schick1
1
Department of Physics, University of Washington, Box 351560, Seattle, Washington 98195-1560, USA
2
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Ramat Aviv 69978,
Tel Aviv, Israel
3
Department of Chemical Engineering, Ben Gurion University of the Negev, P.O. Box 653, Beer Sheva
84105, Israel
Received 18 December 2009; accepted 17 March 2010; published online 28 April 2010
We consider the effect of mobile ions on the applied potential needed to reorient a lamellar system
of two different materials placed between two planar electrodes. The reorientation occurs from a
configuration parallel to the electrodes favored by surface interactions to an orientation
perpendicular to the electrodes favored by the electric field. The system consists of alternating A and
B layers with different dielectric constants. The mobile ions are assumed to be insoluble in the B
layers and hence confined to the A layers. We find that the ions reduce the needed voltage most

  

Source: Andelman, David - School of Physics and Astronomy, Tel Aviv University

 

Collections: Materials Science; Physics