Figure 5
From: A water-based green approach to large-scale production of aqueous compatible graphene nanoplatelets

Characterization of the chemical compositions of GNPs: (a) XPS, (b) FTIR, and (c) Raman spectroscopy; (d) photographs of solutions of graphene dispersed in deionized water for one month, (e) photograph of a 3 µm thick graphene paper (1 × 3 cm), and (f) SEM side view image of a thick graphene paper.