The synthesis of dye doped nanoparticles typically involves encapsulating the dye molecules within a nanoparticle matrix. Common methods include sol-gel processes, microemulsion techniques, and co-precipitation methods. Each method has its own advantages and can be selected based on the desired properties of the final product. For instance, sol-gel processes are often used for creating silica-based nanoparticles, while microemulsion techniques are useful for producing polymer-based nanoparticles.