Surface reconstruction
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Surface reconstruction refers to the process by which atoms at the surface of a crystal assume a different structure than that of the bulk. Surface reconstructions are important in that they help in t
Image of surface reconstruction on a clean Au(100) surface, as visualized using scanning tunneling microscopy. The surface atoms deviate from the bulk crystal structure and arrange in columns several atoms wide with pits between them.
Physisorption
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Physisorption, also called physical adsorption, is a process in which the electronic structure of the atom or molecule is barely perturbed upon adsorption.
Surface reconstruction
…gas pressure, etc.). Composition plays an important role in that it determines the form that the adsorption process takes, whether by relatively weak physisorption through van der Waals interactions or stronger chemisorption through the formation of chemical bonds between the substrate and adsorbate atoms. Surfaces…
Fig. 1. Schematic illustration of an adsorbed hydrogen atom near a perfect conductor interacting with its image charges.
Fig. 2. Calculated physisorption potential energy for He adsorbed on various jellium metal surfaces. Note that the weak van der Waals attraction forms shallow wells with the energy about few meV.
Ar alpha s data