Storing energy in carbon nanotubes

Figure 2. Real SWNT materials can take several forms. An individual chiral SWNT (top, atomic force micrograph) has a diameter of 1.3 nm (22).
A crystalline nanotube bundle, or “rope” (middle, high-resolution TEM) consists of about 100 SWNTs, with similar diameters, packed into a triangular lattice (23).
Typical bulk material (bottom, SEM, 2.5 mm in the horizontal direction) consists of a random tangle of ropes (24). (All micrographs used by permission.)

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