Fig. 6
From: Fabrication of Gold Nanoparticles/Graphene-PDDA Nanohybrids for Bio-detection by SERS Nanotechnology

XPS analysis of AuNPs and Au/graphene-PDDA
From: Fabrication of Gold Nanoparticles/Graphene-PDDA Nanohybrids for Bio-detection by SERS Nanotechnology
XPS analysis of AuNPs and Au/graphene-PDDA