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

Figure 5

SEM images of GS decorated with Ag NPs coverage of (a) 6.5% and (b) 12.6% in almost the same size distribution. (c) Corresponding SERS spectra of GS with Ag NPs decoration (blue one for 12.6% and red one for 6.5% coverage) and without Ag NPs decoration (black one which has been amplified 20 times). Scale bar 200 nm.

(a) GS@low density

(b) GS@high density

(c)