Multi functionality is achieved through the careful design and synthesis of nanostructures. These structures can be engineered to possess different functional groups, enabling them to interact with multiple targets or perform various actions. For example, a single nanoparticle can be designed to target cancer cells, deliver drugs, and provide imaging capabilities all at once. This is possible through the use of surface modification techniques, where different molecules are attached to the nanoparticle’s surface to endow it with the desired properties.