Observation of adsorbed water on various materials by AFM and FT-IR

Previous AFM observation showed that small water droplets and water film were observed on the surface when pure water or aqueous solution was poured on graphite or mica. In this experiment, pouring pure water and 0.01 kmol.m(-3) CuSO4 + H2SO4 aqueous solution on graphite, adsorbed water observed by AFM was tried to detect by the FT-IR microscope. The existence of adsorbed water on the surface of gold and pure iron was also examined by the FT-IR microscope and BFM. The results showed that the peak of water was observed near 1590 cm(-1) on the surface of graphite, gold and pure iron. The existence of liquid film of which thickness is 2 nm was confirmed by the AFM observation. From these results, there is the high possibility that the water film exists on the metal surface used for present experiment.