N2 physisorption

N₂ physisorption is a technique used to analyze the surface area and porosity of materials by measuring how nitrogen gases adhere to their surfaces at very low temperatures. When nitrogen is introduced, it naturally sticks to the material's surface in a process called physisorption. By observing how much nitrogen is absorbed at different pressures, scientists can determine the size and distribution of tiny pores and the overall surface area of the material. This information helps in understanding the material's properties, which is important in applications like catalysis, filtration, and material development.