Fig. 1: Physicochemical properties of graphene oxide nanosheets (GOs).
From: Selective regulation of macrophage lipid metabolism via nanomaterials’ surface chemistry
a Schematic illustrating the ball-and-stick model of three types of GOs with varying degrees of oxidation: low (L-GO), medium (M-GO), and high (H-GO). Carbon, oxygen and hydrogen are presented in black, blue and green, respectively. b AFM images showing GOs with different oxidation degrees. Scale bar represents 1 μm. c Quantitative analysis of oxidation levels and functional groups (C-O-C, C = O, O-C = O, and C-C) determined by XPS. d Surface charges of GOs evaluated by zeta potential measurements. e Hydrophilicity of the three types of GOs measured by contact angle analysis. Data are presented as mean ± standard deviation for three replicates (n = 3). f Raman spectra for the three types of GOs. Source data are provided as a Source Data file.
