Scratches, represented by triangular-shaped grooves, make the surface area greater. Specific surface area (SSA) is a property of solids defined as π the total surface area (SA) of a material per unit mass,[1] (with units of m2/kg or m2/g). Alternatively, it may π be defined as SA per solid or bulk volume[2][3] (units of m2/m3 or mβ1). It is a physical value that can π be used to determine the type and properties of a material (e.g. soil or snow). It has a particular importance π for adsorption, heterogeneous catalysis, and reactions on surfaces. Measurement [ edit ] ...and plastic BiaΕecki rings of increased SSA
