Table 1.

Physicochemical properties of HAuNS and PEG-HAuNS

	HAuNS	PEG-HAuNS
Concentration (mg/mL)	2.5 × 10−3	2.5 × 10−3
Concentration (particles/mL)	6.25 × 109	6.25 × 109
Mean diametera (nm)	43.6 ± 0.4	62.7 ± 0.7
Polydispersitya	0.006 ± 0.001	0.068 ± 0.005
Zeta potential (mA)	−23 ± 0.8	−15 ± 0.6
Plasma resonance peak (nm)	802	801
Optical densityb	0.112	0.110

^aData are presented as mean ± standard deviation (n = 3), measured by dynamic light scattering. ^bOptical density measured at 800 nm.