CNT Nanocomposite Percolation Network

Randomly place carbon-nanotube-like rods inside a polymer volume and watch electrical percolation happen live: as the filler fraction φ rises, more excluded volume overlaps between rods, more clusters merge, and past a critical threshold φ_c a single connected path spans the whole block — the moment the composite turns from an insulator into a conductor. The aspect-ratio and alignment controls reproduce the real materials trend from the source article: high-aspect nanotubes and graphene percolate at a tiny fraction of a percent, while low-aspect fillers need far more loading, and shear-aligning the rods during processing raises the threshold again.