fig3

Biocompatible composite thin-film wearable piezoelectric pressure sensor for monitoring of physiological and muscle motions

Figure 3. Optical microscope images of PVDF films with (A) 5 wt.%; (B) 10 wt.%; and (C) 30 wt.% BTO-NPs. PVDF: Polyvinylidene fluoride; BTO-NP: BaTiO3 nanoparticle.