Search results
Results from the WOW.Com Content Network
Surface science is the study of physical and chemical phenomena that occur at the interface of two phases, including solid–liquid interfaces, solid–gas interfaces, solid–vacuum interfaces, and liquid–gas interfaces. It includes the fields of surface chemistry and surface physics. [1]
This method is especially used to compare and measure the critical surface tension of low-energy solids (mainly plastics) very quickly and easily. Figure 4 in ZIsman's published article from 1964 [1] shows the critical surface tension as a measure of wettability of Polyethylene. Zisman published this analysis in 1964 and used a variety of ...
C 2 H 4 + 1 / 2 O 2 (adsorbed) → (CH 2 CH 2)O The dissociative adsorption of oxygen is also possible, which leads to secondary products carbon dioxide and water. CO 2 + H 2 (ads.) → H 2 O + CO; 2 NH 3 + 1 + 1 / 2 O 2 (ads.) → N 2 + 3H 2 O on a platinum catalyst; C 2 H 2 + H 2 (ads.) → C 2 H 4 on nickel or iron catalysts
In chemistry, the terrace ledge kink (TLK) model, which is also referred to as the terrace step kink (TSK) model, describes the thermodynamics of crystal surface formation and transformation, as well as the energetics of surface defect formation. It is based upon the idea that the energy of an atom’s position on a crystal surface is ...
Figure 1: LEED pattern of a Si(100) reconstructed surface. The underlying lattice is a square lattice, while the surface reconstruction has a 2×1 periodicity. As discussed in the text, the pattern shows that reconstruction exists in symmetrically equivalent domains oriented along different crystallographic axes.
The interface between matter and air, or matter and vacuum, is called a surface, and studied in surface science. In thermal equilibrium, the regions in contact are called phases, and the interface is called a phase boundary. An example for an interface out of equilibrium is the grain boundary in polycrystalline matter.
This page was last edited on 25 November 2024, at 08:08 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
The quantitative measure of adsorption of the i-th component is captured by the surface excess quantity. [1] The surface excess represents the difference between the total moles of the i-th component in a system and the moles of the i-th component in a particular phase (either α or β) and is represented by: