Research Article

Effects of Ar or O2 Gas Bubbling for Shape, Size, and Composition Changes in Silver-Gold Alloy Nanoparticles Prepared from Galvanic Replacement Reaction

Figure 3

Typical TEM images of (a) polygonal Ag seeds and ((b)–(d)) Ag-Au bimetallic products after heating Ag seeds/HAuCl4/PVP/EG solution for 10–60 min under O2 gas bubbling. Scale bars of TEM images (a) and (b) are the same as those of (c) and (d), respectively.
425071.fig.003a
(a)   Ag seeds
425071.fig.003b
(b) Ag-Au 10 min heating
425071.fig.003c
(c) Ag-Au 30 min heating
425071.fig.003d
(d) Ag-Au 60 min heating