Table 1.

Physicochemical characteristics of AuNPs, AuPEI-NPs and AuBSA-NPs.

Sample	Zeta-Potential (mV)	Polydipersity Index	Hydrodynamic Diameter (nm)
AuNPs	−33.6 ± 2.0	0.145 ± 0.006	17.4 ± 0.4
AuMUA-NPs	−53.8 ± 3.4	0.288 ± 0.001	46.0 ± 2.2
AuMUA-PEI-NPs	39.9 ± 1.3	0.258 ± 0.008	125.9 ± 2.8
AuBSA-NPs	−35.7 ± 1.8	0.212 ± 0.008	35.9 ± 0.5