The GAS process involves dissolving the desired material in a suitable solvent. The supercritical gas is then introduced into the solution. The gas dissolves in the solvent and causes a reduction in the solubility of the solute. As a result, the solute precipitates out of the solution in the form of nanoparticles. The parameters such as temperature, pressure, and the choice of solvent play a crucial role in determining the size and morphology of the nanoparticles.
