Preparation of Colloidal Gold Solution
As shown in Figures 4A and 4B, the prepared gold solution was clear and
bright wine-red, with a maximum absorption peak wavelength of 520 nm,
according to the regression equation Y = 0.786X + 505.53 (Y is the
maximum absorption wavelength and X is the particle size). It can be
seen that the average particle size of the colloidal gold is
approximately 18.4 nm, and all the three parameters meet the
requirements of obtaining a good quality colloidal gold solution
(Safenkova et al., 2010).
Figure 4│ Nanogold solution ocular view (A), UV scan figure (B)