Brunauer-Emmett-Teller

The Brunauer-Emmett-Teller (BET) theory explains how gases absorb onto solid surfaces, helping us measure surface area. When a gas like nitrogen interacts with a material, layers of gas molecules form on its surface. By analyzing how much gas is absorbed at different pressures, BET provides a way to calculate the total surface area, including tiny pores. This method is essential for characterizing materials like catalysts, powders, and porous solids, giving insight into their shape, size, and functionality.