Highly Stable Surface-Enhanced Raman Spectroscopy Substrates Using Few-Layer Graphene on Silver Nanoparticles

Figure 4

(a) A typical TEM image of the few-layer graphene-encapsulated Ag nanoparticles and (b) the high-resolution TEM image of (a) showing few graphene layers with about 3.5 nm of thickness on the Ag nanoparticle.

(a)

(b)