Figure 3

(a–c) Fitting results of X-ray photoelectron spectroscopy (XPS) C1s spectra and (d–f) O1s spectra of L25G70, L50G45, and L75G20.

(a–c) Fitting results of X-ray photoelectron spectroscopy (XPS) C1s spectra and (d–f) O1s spectra of L25G70, L50G45, and L75G20.