fig2
Figure 2. (A) Raman and (B) XRD spectra of GO and rGO; FTIR spectra of different component materials and hydrogels (C) regions within 4,000-500 cm-1 and (D) regions within 1,800-600 cm-1. FTIR: fourier transform infrared spectroscopy; rGO: reduced graphene oxide; XRD: X-ray diffraction.
