178524.fig.002a
(a)
178524.fig.002b
(b)
178524.fig.002c
(c)
Figure 2: TEM images of iron encapsulated in carbon nanoparticles produced by arc-discharge ( A of current) using different flows and concentrations accompanied by their size distribution histograms. (a) 30 mL/min with a concentration of 1% w/w, (b) 30 mL/min with a precursor concentration of 2% w/w, and (c) 30 mL/min with a concentration of 4% w/w.