Extended Data Fig. 7: SEM images of a vacuum-filtered MXene–SWCNT paper with a thickness of around 35 µm.
From: Thickness-independent capacitance of vertically aligned liquid-crystalline MXenes

a, The full cross-section of the freestanding film. b, A higher-magnification image of the top portion of a. Both images show horizontally stacked layers of MXene nanosheets interpenetrated with SWCNTs, a configuration that has been reported to facilitate ion diffusion1.