289371.fig.003a
(a)
289371.fig.003b
(b)
Figure 3: TEM images of Au nanoparticles of an average diameter of 15 nm (a) with a homogeneous size distribution (scale bar 100 nm), (b) with a heterogeneous size distribution (scale bar 100 nm) due to the use of a lower operating temperature (60°C instead of 80°C) in the synthesis process.