There are several methods to achieve grain size reduction in nanotechnology:
Ball Milling: This is a mechanical process that involves grinding materials into extremely fine powders. Chemical Vapor Deposition (CVD): A chemical process used to produce high-purity, high-performance solid materials. Electrodeposition: A method that uses an electric current to reduce dissolved metal cations so that they form a coherent metal coating on an electrode. Thermal Methods: Techniques such as annealing and quenching can also be employed to reduce grain size.