Table 1 Physicochemical properties of HAuNS and PEG-HAuNS

Concentration (mg/mL)

2.5 × 10⁻³

2.5 × 10⁻³

Concentration (particles/mL)

6.25 × 10⁹

6.25 × 10⁹

Mean diameter^a (nm)

43.6 ± 0.4

62.7 ± 0.7

Polydispersity^a

0.006 ± 0.001

0.068 ± 0.005

Zeta potential (mA)

−23 ± 0.8

−15 ± 0.6

Plasma resonance peak (nm)

802

801

Optical density^b

0.112

0.110