Fig. 5: Principle of contact initiation at the liquid-solid interface.
From: Bioinspired triboelectric droplet sensor for ammonia monitoring
a A-droplet’s feature image. b Molecular simulations of NH3 and H2O. c FTIR of ammonia dissolved in water. d Sensor responsiveness to different gases. e Sensitivity of ammonia sensor. f Output Stability of ammonia sensor. g Schematic representation of ion concentrations in aqueous and ammonia solutions. h Schematic diagram of the liquid-solid contact electrification for water and ammonia solutions.
