When CO2 is subjected to temperatures and pressures above its critical point (31.1°C and 73.8 bar), it enters a supercritical state where it has the density of a liquid but the diffusivity of a gas. This allows scCO2 to penetrate porous materials and dissolve contaminants effectively. The cleaning process involves exposing the nanomaterials to scCO2, which then dissolves and removes impurities.
