Brunauer-Emmett-Teller (BET) theory

The Brunauer-Emmett-Teller (BET) theory describes how gases interact with a solid surface to form layers of adsorbed molecules. It helps us understand surface area and porosity of materials, particularly in powders and catalysts. BET theory shows that gases can stick to surfaces in multiple layers, allowing us to calculate a material's total surface area based on how much gas it can adsorb. This is important in fields like chemistry, materials science, and pharmaceuticals, where the surface characteristics of substances play a crucial role in their behavior and effectiveness in various applications.