3D Plasmonic Ensembles of Graphene Oxide and Nobel Metal Nanoparticles with Ultrahigh SERS Activity and Sensitivity

Figure 4

SEM images of GO/GNRs complex at different mass ratio of GO and GNRs. ((a)–(c)) 1 : 7 and ((d), (e)) 1 : 10. (f) TEM image of GO/GNRs complex at mass ratio 1 : 10.

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