surface chemistry

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surface chemistry,

study of chemical reactions in which the reactants are first adsorbed onto a surface medium (see adsorptionadsorption,
adhesion of the molecules of liquids, gases, and dissolved substances to the surfaces of solids, as opposed to absorption, in which the molecules actually enter the absorbing medium (see adhesion and cohesion).
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) that then acts as a catalystcatalyst,
substance that can cause a change in the rate of a chemical reaction without itself being consumed in the reaction; the changing of the reaction rate by use of a catalyst is called catalysis.
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 for the reaction; after the reaction the products are desorbed and the surface is left unchanged. Since the entire reaction takes place on the surface, the amount of surface area of catalyst per unit weight determines the effectiveness of the surface in the reaction. Some silica surfaces have over 200 square meters of surface area per gram. An example of a surface reaction is the reaction of an unsaturated organic molecule with hydrogen on finely divided platinum or with bromine on finely divided silica. Enzymeenzyme,
biological catalyst. The term enzyme comes from zymosis, the Greek word for fermentation, a process accomplished by yeast cells and long known to the brewing industry, which occupied the attention of many 19th-century chemists.
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 reactions can, in principle, also be considered surface reactions, since the reaction takes place on the enzyme surface after the enzyme has bound the reactants; however, usually only heterogeneous (two-phase) reactions are considered true surface reactions, while enzyme reactions are homogeneous (one-phase) systems.

surface chemistry

[′sər·fəs ‚kem·ə·strē]
(physical chemistry)
The study and measurement of the forces and processes that act on the surfaces of fluids (gases and liquids) and solids, or at an interface separating two phases; for example, surface tension.
References in periodicals archive ?
As such, surface science techniques are required to determine the structure and chemical composition of dentin surfaces.
Currently, he also serves as the Chair of the Joint Division of Surface Science of CSC and CAP.
The current leader in confocal microscopy is Bio-Rad, but the company is continually pressed by other leading surface science vendors such as Leica.
A software package, ASTEK for the Analysis and Simulation of Thermal Equilibrium and Kinetics of gases on surfaces, based on our approach, is available commercially and is routinely used by many surface science groups worldwide [4].
Given this, it is no surprise that the companies hit hardest by the current woes of the semiconductor industry are those whose portfolios are based primarily on surface science techniques or other technologies with unique applications for the industry.
He said that surface science, especially applications of nanobiochar, nanobiocomposites, nano-particles and low cost bio-materials are prerequisite to provide solutions to environmental issues.
The European Space Agency (ESA), working in conjunction with Russia's space agency, has successfully completed a major parachute test, one that would ensure its rover and surface science platform, set to launch as the second part of its ExoMars mission, reach the Red Planet safely.
The conference program opens on April 12 and is grouped into key inkjet topics:Track one being focused on printheads, hardware, software and integration technologies, whilst track two is focused on inkjet ink, ink components, laboratory testing, curing surface science and application related topics.
Abedini, "Chemisorption of NO on Pt-decorated graphene as modified nanostructure media: a first principles study," Applied Surface Science, vol.
Schienle et al., "In situ monitoring of InAs-on-GaAs quantum dot formation in MOVPE by reflectance-anisotropy-spectroscopy and ellipsometry," Applied Surface Science, vol.
Blugel, "The Rashba-effect at metallic surfaces," Surface Science, vol.
Basic research in surface science and interface is highly interdisciplinary, covering the fields of physics, chemistry, biophysics, geographic, atmospheric and environmental sciences, materials science, chemical engineering, among others, specifically the kinetic behavior of the gas--solid interfaces is generally the phenomenon of interest in surface science.