![]() ![]() Nitrogen is the most commonly employed gaseous adsorbate for probing surface(s). BET theory applies to systems of multilayer adsorption that usually utilizes a probing gas (called the adsorbate) that do not react chemically with the adsorptive (the material upon which the gas attaches to and the gas phase is called the adsorptive) to quantify specific surface area. In 1938, Stephen Brunauer, Paul Hugh Emmett, and Edward Teller presented their theory in the Journal of the American Chemical Society. The observations are very often referred to as physical adsorption or physisorption. ![]() ![]() Theory for physical adsorption of gas molecules on a solid surfaceīrunauer–Emmett–Teller ( BET) theory aims to explain the physical adsorption of gas molecules on a solid surface and serves as the basis for an important analysis technique for the measurement of the specific surface area of materials. ![]()
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