Figure 2.

Gold nanorods synthesized using 50 μL of silver nitrate in growth solution. (a) Optical extinction spectrum showing the transverse plasmon peak at 516.5 nm and the longitudinal plasmon peak at 675 nm. The amplitude of the longitudinal plasmon peak is higher than transverse plasmon peak which indicates the formation of high yield of nanorods compared to spheres. (b) High-resolution scanning electron microscope (SEM) image of gold nanorods showing high monodispersity. Few nanospheres are observed.