Fig. 3: The band offset variations for different layers of liquid–solid systems.
From: Understanding contact electrification at liquid–solid interfaces from surface electronic structure
a SiO2 + H2O. b SiO2 + H2O + Na. c SiO2 + H2O + Na+. d TiO2 + H2O. e TiO2 + H2O + Na. f TiO2 + H2O + Na+. g HfO2 + H2O. h HfO2 + H2O + Na. i HfO2 + H2O + Na+.
