fig5
From: Organic biodegradable piezoelectric materials and their potential applications as bioelectronics
Figure 5. Strategies to enhance the piezoelectric properties of biodegradable materials. (A) Dipole alignment under tensile stress. (B) Schematic illustration of electrospinning. (C) Schematic illustration of the enhanced alignment of dipoles in the piezoelectric crystals under external applied electric field. (D) Schematic illustration of the enhanced alignment of dipoles induced by HB.