Figure 4
From: Bioinspired Fabrication of one dimensional graphene fiber with collection of droplets application

XPS survey scans of (a) GP and (d) RGP spindle-knot. C1s XPS spectra of (b) GP and (e) RGP spindle-knot, O1s XPS spectra of (c) GP and (f) RGP spindle-knot.