Figure 3.

Characterisation of bimetallic silver-gold nanoshells. (A) UV-Vis absorbance spectra showing pure silver and pure gold nanoparticles for comparison and the Ag-Au bimetallic nanoparticle, with two absorption peaks at 439 and 629 nm. (B) TEM image showing homogeneous nanoparticles 100 days post-synthesis (scale bar 100 nm), with inset particle diameter distribution. (C) AFM topography image in air showing disperse homogeneous nanoparticles 100 days post-synthesis (scale bar 800 nm), with inset particle height distribution.