Energy harvesting technologies that are engineered to miniature sizes, while increasing the power delivered to wireless electronics [1, 2], portable devices, stretchable electronics  and implantable bio-sensors [4, 5] are strongly desired. Piezoelectric nanowire- and fiber-based generators have potential uses for powering such devices through conversion of mechanical energy into electrical energy . However, the piezoelectric voltage constants of the semiconductor piezoelectric nanowires of the reported nanogenerators [7, 8, 9, 10, 11, 12] are low. Here we introduce a piezoelectric nanogenerator based on lead zirconate titanate (PZT) nanofibers . The PZT nanofibers, with diameters and lengths of approximately 60 nm and 500 μm, respectively, were aligned on interdigitated electrodes of platinum fine wires and packaged using a soft polymer on a silicon substrate. The measured output voltage and power under periodic stress applications to the soft polymer were 1.63 V and 0.03 μW, respectively.
Output Voltage Energy Harvesting Interdigitated Electrode Adjacent Electrode Soft Polymer
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This work was supported in part by the National Science Foundation (Award No. CMMI-0826418 & No. ECCS-0802168), by the NSF MRSEC program through the Princeton Center for Complex Materials (grant DMR-0819860; N.Y.).