Figure 8
From: Bioinspired Fabrication of one dimensional graphene fiber with collection of droplets application

Structural features of bioinspired fiber with RGP spindle-knot. (a,b) SEM images show the center region of a single geometric RGP spindle-knot in the insets in (a). (c,d) SEM images show the center region of a single geometric LGP spindle knot in the insets in (c). The water drop profiles of RGP and LGP spindle knot inset in (b) and (d) show different wettability characters.