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Studies two-dimensional localization of adsorbate/substrate charge-transfer excited states of molecules adsorbed on metal surfaces. Effect of Cs adsorption on the Cu surface state; Intramolecular excited states of PMDA adsorbed on Cu; Cu/PMDA charge-transfer excitation; Fermi energy and excited state localization.

Water adsorbed on the (001) face of NaCl under ambient conditions has been studied by infrared spectroscopy. From these measurements, combined with recent Monte Carlo calculations, we find evidence of two structures for the adsorbed water. At low coverages, the water molecules aggregate into islands on the surface. When a critical concentration is reached, multilayer growth becomes favorable, creating a thin film on the surface with properties similar to liquid water. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]