Fig. 1: Fabrication and characterisation of graphene oxide. | Nature Communications

Fig. 1: Fabrication and characterisation of graphene oxide.

From: Understanding water transport through graphene-based nanochannels via experimental control of slip length

Fig. 1

a Schematic of vacuum filtration setup for graphene oxide membrane (GOM) preparation. b, c GOM prepared by (b) membrane intercalation method (X-M-GO) and (c) solution intercalation method (X-S-GO). Violet and green spheres represent the cations and anions, respectively. d TEM image of GO sheets showing the lateral size of ~0.48 µm. e Cross-sectional SEM image of GOM with thickness ~197 nm on PVDF substrate. f XRD pattern of wet GOM (red spectrum, 2θ = 7.19°) and dry GOM (black spectrum, 2θ = 9.38°). g XPS survey scan showing O1s and C1s peak. The carbon/oxygen ratio (C/O) is ~2.97. h XPS C1s spectra (black curve) showing C=O bond (pink curve) at ~288.1 eV, C–O bond (red curve) at ~286.7 eV and C–C bond (blue curve) at ~284.8 eV. Source data are provided as a Source Data file.

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