Figure 2

Characterization of the GO, rGO, and NAu-rGO nanocomposite. (a) UV–Vis spectra of GO (blue), rGO (red), and NAu-rGO nanocomposite (black). (b) XRD patterns of rGO (black), NAu-rGO(red) (Inset: XRD patterns of GO) (c) Raman spectra of GO (black) and NAu-rGO nanocomposite (red).