Journal Article nanogenerators 2D materials 3D mesostructures Hydrocarbons, Fluorinated Polymers Research Support, Non-U.S. Gov't Review Vinyl Compounds Xylenes atomic stacking contact electrification coupling effects electrocardiogram electronic skins graphene field-effect transistors graphene tribotronics hybrid energy harvesters kelvin probe force microscopy mechanical buckling mechanical energy neonates organoids pediatrics physiological monitoring piezoelectricity poly(vinylidenefluoride-co-trifluoroethylene) poly(vinylidenefluoride-trifluoroethylene) skin soft electronics