Fig. 1: The top view of different solids after CE with water.
From: Understanding contact electrification at liquid–solid interfaces from surface electronic structure
Single-layered water on a Diamond, Gray balls = C, b SiO2, Yellow balls = Si, c TiO2, Silver balls = Ti, and d HfO2, Blue balls = Hf. Red balls = O and White balls = H. For the multi-layered water models, the solid materials have been displayed by lines to deliver a clear demonstrations. Multi-layered water on e ZnO, Dark silver line = Zn, f SnO2, Grey line = Sn, g MgO, Light green line = Mg, h HfO2, Blue line = Hf, i Ta2O5 Light blue line = Ta, and j BaTiO3, Green line = Ba. Red balls = O and White balls = H.
