Table 1: Size distribution, maximum peak wavelength in UV-Vis absorption spectra, and calculated concentration, number, and surface area of different gold colloidal solutions.

Sizeλ max (nm) Concentration of gold (mM) Number of gold NPs (/L) Surface area of gold NPs (m2/L)
Mean (nm)Standard deviation (nm)Relative standard deviation (%)

17 529510 0.25
30 723525 0.12
40615530 0.045
50 816536 0.050
60 813540 0.056
80 13165500.084