Table 2.

Summary of AuNP characterization.

Size (nm)	Core diameter (nm)	Hydrodynamic diameter (nm)	Polydispersity index	Zeta-potential (mV)	Absorbance peak (nm)
4	3.9 ± 1.2	24.1 ± 1.2	0.22 ± 0.03	−6.0 ± 0.3	512
15	14.8 ± 3.9	40.7 ± 0.6	0.26 ± 0.06	−20.3 ± 5.5	521
50	50.6 ± 4.9	69.9 ± 0.1	0.08 ± 0.02	−24.2 ± 0.7	532
79	78.9 ± 10.5	96.9 ± 0.2	0.12 ± 0.01	−32.7 ± 0.3	551
100	99.2 ± 11.3	104.8 ± 0.4	0.17 ± 0.02	−35.5 ± 0.7	575
152	152.3 ± 16.4	140.6 ± 0.6	0.17 ± 0.01	−32.1 ± 1.1	627

The core sizes of the AuNP were calculated from TEM. The hydrodynamic diameters were measured with dynamic light scattering (DLS). The polydispersity indexes were derived from DLS measurements. The plus-minus symbol represents the standard deviation of the measurements in each case.