Figure 1. Physical structure and morphology of CBxMWNT 3-D network.

(a) Photograph of 3D macroscopic CBxMWNT solid sponge material as-produced; (b) shows photograph of the flexibility and mechanical stablility upon bending the sample (a) by hand; (c) SEM image after ion beam “slice and view” feature showing the interior porous structure of the entangled nanotube network; (d) closer look at the “elbow” defects found in CBxMWNT solids; (e) STEM image showing two, four-way covalent nanojunctions in series; (f) TEM image showing two overlapping CBxMWNTs welded together assisted by boron doping.