Fig. 1
From: Self-Powered Active Sensor with Concentric Topography of Piezoelectric Fibers
a Schematic of the near-field electrospinning process to fabricate direct-write PVDF fibers with concentric circle topography. (i) Added gaps in Cu foil and cut with Polyvinylchloride (PVC) substrate into proper shape. (ii) Fabricated PVDF fibers via NFES. (iii) Welded wires on Cu foil. (iv) Fully encapsulated with Polydimethylsiloxane (PDMS). b Photographic image of the finished device. c PVDF fibers deposited on the copper foil before encapsulated. d Optical microscope image of the fabricated fibers. e, f Enlarged SEM photomicrographs showed a single PVDF fiber