Carbon Nanotube & Fullerene — Nanotechnology Simulator

⚗️ Carbon Nanotube

A carbon nanotube is a rolled graphene sheet. The rolling direction (chirality vector C = na₁ + ma₂) determines the tube type and electrical properties.

🔢 Chirality vector (n, m)

n = 8 m = 4

🎛 Display

Rotation speed 1.0× Tube length 5 cells

📐 Properties

Diameter

—

Chiral angle

—

Type

—

Bandgap

—

ℹ️ Physics

sp² hybridization: each C atom bonds to 3 neighbours, forming a hexagonal lattice. The leftover π electron is delocalised.

Diameter: d = a₀√(n²+nm+m²)/π, a₀ = 0.246 nm
Chiral angle: θ = atan(√3·m / (2n+m))

Metallic if (n−m) mod 3 = 0; otherwise semiconductor with Eg ≈ 0.9 eV·nm / d.