Table 3.

Summary of mean hydrodynamic diameters and zeta-potentials determined in water.

Sample	Au-PEG NPs	Au PEG-Control NPs	Au-PEG-anti-HRP NPs	Au-PEG-anti-VEGF NPs
dh (nm)	27.4 ± 0.4	27.4 ± 1.6	26.1 ± 2.1	29.3 ± 1.7
ζ (mV)	−32.8 ± 0. 6	−30.1 ± 1.2	−24.3± 0.9	−31.4± 1.3