fig6

Figure 6. Energy harvesting. (A) Schematic illustration of the fabrication scheme to form large-scale aligned FF PNTs. (B) Output voltages and currents of FF PNT energy harvester as a function of applied force. (A and B) reproduced with permission^[105]. Copyright 2018, American Chemical Society. (C) Schematic illustration of the structure of the biodegradable piezoelectric nanogenerators (PENGs) based on FF peptides enabled by PLA polymer-assisted transfer. (D) Voltage and current outputs of FF-based biodegradable PENGs under applied forces ranging from 2 to 60 N. c and d reproduced with permission^[34]. Copyright 2021, Elsevier. (E) Schematic illustration of PLLA cantilever beam. (F) Voltagetime dependence of a lithium battery charged by the PLLA cantilever. The inset shows the charging circuit and the photograph of 30 LEDs lit by the battery. (E and F) reproduced with permission^[106]. Copyright 2017, John Wiley and Sons.