Nanowerk December 23, 2024
3D buckling makes stretchability possible in devices but, when applied to piezoelectric devices due to the uneven distribution of internal strain during deformation. When strains with opposite directions simultaneously affect piezoelectric materials, the electric output can decrease due to cancellation. Researchers in the Republic of Korea developed an electrode design tailored to the direction of strain and a circuit configuration that prevented electric output cancellation. These designs provided stretchability to piezoelectric nanogenerators (PENGs) and minimized electric output loss. Using an inorganic piezoelectric material with a high piezoelectric coefficient, they demonstrated the dynamics of energy harvesting. In vitro and in vivo experiments validated the device’s effectiveness in biomechanical energy harvesting. According to the researchers their results represent a significant advancement in stretchable PENGs, offering robust and efficient solutions for wearable electronics and biomedical devices… read more. Open Access TECHNICAL ARTICLE
Graphical abstract. Credit: ACS Nano, Vol 18/Issue 50, December 5, 2024