Highly Sensitive Surface Enhanced Raman Spectroscopy from Ag Nanoparticles Decorated Graphene Sheet

Figure 3

SEM images of Ag NPs on GS with different size distribution of (a) 20–50 nm and (b) 50–100 nm. (c) Corresponding SERS spectra of GS with (blue and red) and without (black one which has been amplified 20 times) Ag NPs decoration. Scale bar 100 nm.

(a) GS@20–50 nm Ag NPs

(b) GS@50–100 nm Ag Nps

(c)