Binding energy of benzoate ions on alumina

We present a simple statistical mechanical model for the adsorption of molecules from solution onto solid surfaces. This model improves our understanding of the liquid doping technique commonly used in inelastic electron tunneling spectroscopy (IETS) sample preparation. Using this model we obtain an excellent two parameter fit to the experimental data of Langan and Hansma for the surface concentration vs solution concentration for the adsorption of benzoic acid on alumina from a water solution. This fit gives the density of binding sites N = 1.0 × 1015 cm-2 and the binding energy ε{lunate} = 1.0eV for the system. © 1979.