Several methods are used for encapsulation in nanotechnology: - Emulsion Techniques: Involves creating a stable emulsion where the active substance is dispersed within a carrier matrix. - Coacervation: A phase separation process that forms a coating around the active substance. - Spray Drying: A method where the active substance is dissolved or suspended in a liquid and then rapidly dried to form a solid encapsulated product. - Sol-Gel Processes: Involves the transition of a solution into a solid gel to encapsulate the active substance. - Supercritical Fluid Extraction: Uses supercritical fluids to form nanoparticles and encapsulate active substances.