Brunauer-Emmett-Teller (BET) surface area

The Brunauer-Emmett-Teller (BET) surface area is a measurement used to determine the total surface area of a material, especially porous solids like powders and catalysts. It works by exposing the material to a gas (usually nitrogen) at very low temperatures, allowing the gas molecules to stick to the surface. By analyzing how much gas the material can hold, the BET method calculates the area of all the tiny pores and surfaces present. This measure helps scientists understand how reactive or effective a material might be in applications like catalysis, filtration, or energy storage.