531760.fig.002a
(a)
531760.fig.002b
(b)
531760.fig.002c
(c)
531760.fig.002d
(d)
Figure 2: (a) UV-vis absorption spectra of the synthesized PEG-AuNPs with respect to . Inset shows color of synthesized PEG-AuNPs. (b-c) TEM images and their corresponding size distributions of the synthesized PEG-AuNPs synthesized at different   −124.2°C/min (b) and 34.2°C/min (c). (d) UV-vis spectra of PEG-AuNPs recorded at 24 h with PBS and NaCl.