Figure 2
From: Bioinspired Fabrication of one dimensional graphene fiber with collection of droplets application
Structural features of bioinspired fiber with GP spindle-knot. SEM images show a single geometric spindle knot in (a), and the roughness gradient that forms from the center region (b) to the side region of a spindle knot (near the connecting part), accompanying the anisotropic distribution due to the structure extension (c).
