Morphologies of the graphene-based air electrode. a, b) SEM images of as-prepared functionalized graphene sheets (FGS) (carbon/oxygen (C/O) = 14) air electrodes at different magnifications. c, d) ...

The colors display the graphene layers and wrinkles. Image parameters: 20 μm x 20 μm, 150 x 150 pixels = 22,500 spectra, integration time: 0.05 s/spectrum. SEM image overlaid with the confocal Raman ...

Image Credit: Macrovector ... Additional evaluations included optical and scanning electron microscopy (SEM) imaging to inspect graphene coverage and stability. The pyrene layer significantly ...