Figure 4: (a)UV-Vis spectra of 5-FU @AuNPs formed with different volume ratio of 5-FU, (b) TEM images for 1mL:0.5 mL of Au:5-FU show mostly linearly arranged assemblies of NPs, (c) TEM images for 1mL:1mL of Au:5-FU, while the nanoparticles assemblies are more complex.