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Abstract
We report piezoresponse force microscopy (PFM) studies of single electrospun polyvinylidene fluoride (PVDF) nanofibers on the Pt/Ti electrode substrate. The out-of-plane piezoelectric response is much stronger than the in-plane, which is dependent on the parameters of the electrospinning technique. Further, the local polarization switching of the thin nanofibers can be quantitatively characterized by the amplitude-voltage butterfly loop and phase-voltage hysteresis loop. The piezoelectric coefficient (d33) of the nanofibers is diameter-dependent. The thinnest nanofiber studied here is 30nm and has the maximal |d33| of 38.5pmV−1. The excellent piezoelectric properties of these low-dimensional nanofibers can facilitate the development in sensing and energy harvesting applications.
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