Nanoscale investigation of ferroelectric properties in electrospun barium titanate/polyvinylidene fluoride composite fibers using piezoresponse force microscopy |
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| Authors: | Avinash BajiYiu-Wing Mai Qian LiYun Liu |
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| Affiliation: | a Centre for Advanced Materials Technology (CAMT), School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia
b Research School of Chemistry, Australian National University, Canberra, ACT 0200, Australia |
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| Abstract: | Ferroelectric nanostructures have broad applications in nanoscale electronic devices, sensors and actuators. In this study, a two-step electrospinning process was used to fabricate barium titanate (BaTiO3)/polyvinylidene fluoride (PVDF) composite fibers. Microstructure examination showed that BaTiO3 fibers were well-dispersed within the PVDF fiber matrix and aligned along the fiber axis. X-ray diffraction (XRD) study revealed that crystalline phases corresponding to both PVDF and BaTiO3 were found. The domain switching and associated ferro-/piezo-electric properties of the BaTiO3-PVDF fibers were characterized. Polarization-electric field hysteresis loops obtained using piezoresponse force microscopy (PFM) confirmed the polar domain switching behavior of the fibers. Distinct strain-electric field hysteresis loops were also recorded. Hence, the fibers exhibited well-defined piezoelectric and ferroelectric properties. The results show the potential of these nanostructured composite fibers for applications in miniaturized electronic devices and sensors. |
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| Keywords: | A Nano composites A Fibers A Functional composites E Electro-spinning |
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