Properties of Physisorbed

Ultra violet photoelectron spectroscopy N(ls) peaks are found at — 12 and — 8 eV [462]. At 85 K X-ray photoelectron spectroscopy N(Is) peaks are found at 405.9 and 401.2 eV [462, 463]. High resolution electron energy loss spectroscopy shows a N-N stretch in yN2 at 2100 cm [231]. For N2 the work function decreases linearly with the coverage up to saturation [22]. 

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As has already been indicated, none of the above-mentioned computer simulations have given a complete (wide density and temperature ranges) and rigorous characterization of statistical mechanics theories of 2D fluids. In order to go more deeply into the theoretical study of 2D L-J fluids, more extensive computer simulations have been performed by us [226,288]. In particular, the results have permitted us to test the validity of the WCA perturbation theory and to propose a simple and accurate analytical expression for the equation of state of 2D L-J fluids [Eq. (29)], which can be applied to obtain properties of physisorbed systems as described in preceding subsections. Other applications are given in Table 12. 

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