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Structural Characteristics and Piezoelectric Properties of Electrospun Piezoelectric nanofibers

Published online by Cambridge University Press:  01 February 2011

Yong Shi ,
Shiyou Xu ,
Sang-Gook Kim  and
Matthew Libera
Yong Shi
Affiliation:
yshi2@stevens.edu, Stevens Institute of Technology, Mechanical Engineering, Castle Point on the Hudson, Hoboken, New Jersey, 07030, United States, 2012165594
Shiyou Xu
Affiliation:
sxu@stevens.edu, Stevens Institute of Technology, Mechanical Engineering, United States
Sang-Gook Kim
Affiliation:
sangkim@stevens.edu, Massachusetts Institute of Technology, Mechanical Engineering, United States
Matthew Libera
Affiliation:
mlibera@stevens.edu, Stevens Institute of Technology, Chemical Biomedical and Materials Engineering, United States
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Abstract

This paper reports the development and characterization of PZT nanofibers with average diameters ranged from 50 to 150 nm for various sensing and actuation applications. PZT nano fibers have been developed by sol-gel electrospinning process. Both randomly distributed and uniaxially aligned PZT fibers were obtained from the sol-gel solution with viscosity modified by polyvinyl pyrrolidone (PVP). The diameters of the nano fibers can be further reduced or controlled for different applications. The morphology and structure of the nanofibers were examined with SEM, TEM and XRD. We used two-step process to anneal the electrospun fibers and XRD confirmed that pure perovskite phase was formed after the as-spun fibers being annealed at about 650°C. TEM results showed that the grain size of the fibers was about 10 nm. Microelectromechanical (MEMS) based micro-fabrication technologies were used to assist the development of the nano-fibers in designing the test samples, depositing and patterning the electrodes, and also testing the performance of the nano fibers. Different approaches have been explored to fabricate the uniaxially aligned nano fibers. SEM results showed that partial aligned PZT nano-fibers were obtained on the pre-patterned substrats. Interdigitated Electrodes were evaporated on the partial aligned fibers by using shadow mask. Hysteresis curve of the nano piezoelectric fibers was also obtained, however further tests are still needed to get accurate measurement. The obtained PZT nanofibers have promising application potentials in designing and enabling micro and nano devices.

Keywords

nanoscalepiezoelectricfiber
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 888: Symposium V – Materials and Devices for Smart Systems II , 2005 , 0888-V08-06
Copyright
Copyright © Materials Research Society 2006

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References

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