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Branching effect and morphology control in electrospun PbZr0.52Ti0.48O3 nanofibers

Published online by Cambridge University Press:  27 August 2014

Arsen Gevorkyan ,
Gennady E. Shter ,
Yuval Shmueli ,
Ahuva Buk ,
Reut Meir  and
Gideon S. Grader
Arsen Gevorkyan
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
Gennady E. Shter
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
Yuval Shmueli
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
Ahuva Buk
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
Reut Meir
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
Gideon S. Grader*
Affiliation:
Chemical Engineering Department, Technion, Haifa 32000, Israel
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Utilization of PbZrxTi1−xO3 (PZT) nanofibers as functional flexible fillers in sensing and energy harvesting applications requires uniform, submicrometer fibers with a large aspect ratio. Previous studies concentrated on the rheological effects on the fiber's diameter and morphology. However, reports on the effect of electric field on these fiber properties are still scarce. In this paper, the effects of surface charge and electric field on the fiber branching are decoupled. We show unequivocally that the external electric field governs this phenomenon. Low viscosity (∼0.12 Pa s) PZT sols yielded a sharp step-like transition from a large to a small diameter regime at electric fields above 0.8 kV/cm. On the other hand, high viscosity sols (∼0.74 Pa s) yielded a transition from a single to a bimodal distribution at the same electric field, due to the branching effect. An ability to obtain a single or bimodal diameter distribution in the range of 100–800 nm was demonstrated.

Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 16 , 28 August 2014 , pp. 1721 - 1729
Copyright
Copyright © Materials Research Society 2014 

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References

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