Figure 5. The relationship between the separation order of (n, m) nanotubes and their physical structures.

(a) Chiral angle. (b) Diameter. (c) Smallest bond curvature radius. The separation orders for the (9, 5), (10, 5) and (11, 3) nanotubes were determined in the first separation process. (c) Indicates that the separation order of (n, m) semiconducting species depends most strongly on their smallest C–C bond curvature radius (that is, their largest bond curvature).