fig4
From: Organic biodegradable piezoelectric materials and their potential applications as bioelectronics
Figure 4. Piezoelectrets. (A) Fabrication process of the polylactic acid (PLA) piezoelectret. Reproduced with permission[89]. Copyright 2020, AIP Publishing LLC. (B) Device structure of a biodegradable and transparent paper-based electret nanogenerator constructed by a transparent cellulose nanopaper (Tpaper) and a PLA piezo-electret. (C) Piezoelectric output currents of the nanogenerator with and without the PLA electret. (B and C) reproduced with permission[90]. Copyright 2016, American Chemical Society.
