Universal Laws of Physical Adsorption
Physics aims at understanding a diversity of phenomena in terms of a small number of “laws”. The search for such unifying simplicity can take on either theoretical (i.e. ab initio) or empirical character. In the case of physisorption, we are only beginning to make progress [1–4] in first principles calculations of atom-surface interaction V(r). A technical but fundamental difficulty is our lack of knowledge of electronic properties in the region where the electronic density falls to a value of order 10−4A−3. This is the region where overlap of surface and adatom charges produces the repulsive part of V(r).
KeywordsUniversal Function Variable Exponent Attractive Part Repulsive Part Anharmonic Potential
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