COMSOL-Based Numerical Analysis of The Electric Field Distribution During Electrospinning and Piezo-response Imaging of Ultra-Fine Lead Zirconate Titanate Fibers

Y. Wang and J. Santiago-Avil├ęs
Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, USA

In this paper, we present our results on synthesizing micro and nanoscopic lead zirconate titanate (PZT) fibers using electrospinning. Furthermore, the PZT fibers have been characterized using the piezo-response imaging (PRI) technique originally developed for the characterization of piezoelectric thin films.

As both electrospinning and PRI work by virtue of electric field, the desired spatial distribution of their electric potential and field is numerically solved under our typical conditions using the finite element analysis tool embedded in COMSOL.

The solutions indicate that both electrospinning and PRI electric field is concentrated around the positively-biased metal tip and evolves into a low field toward the grounded metal. The PRI field peaks at the contact point of the vertical metal tip and horizontal PZT fiber, and its maximum value is higher on the fiber than on a thin film with the same vertical dimension.