The synthesis of gold nanorods typically involves a seed-mediated growth method. This process starts with the creation of small gold seed particles, which are then grown into rods by adding a growth solution containing gold precursors, surfactants, and reducing agents. The surfactants, such as cetyltrimethylammonium bromide (CTAB), play a crucial role in directing the anisotropic growth of the nanorods. By controlling the concentration of these components and the reaction conditions, researchers can fine-tune the size and aspect ratio of the gold nanorods.
