Figure 3

High resolution XPS Spectra of GO, rGO, and NAu-rGO nanocomposite. (a) XPS survey scan of GO and NAu-rGO nanocomposite. (b) High-resolution XPS spectrum of Au 4 f pattern for NAu–rGO nanocomposite. High-resolution spectra of C 1 s of (c) GO and (d) NAu-rGO nanocomposite.