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Chirality-selected single-walled carbon nanotubes (SWCNTs) ensure a greatpotential of building ~1 nm sized electronics. However, the reliable method forchirality-selected SWCNT is still pending. Here we present a theoretical studyon the SWCNT's chirality assignment and control during the catalytic growth.This study reveals that the chirality of a SWCNT is determined by the kineticincorporation of the pentagon formation during SWCNT nucleation. Therefore,chirality is randomly assigned on a liquid catalyst surface. Furthermore, basedon the understanding, two potential methods of synthesizing chirality-selectedSWCNTs are proposed: i) by using Ta, W, Re, Os, or their alloys as solidcatalysts, and ii) by changing the SWCNT's chirality frequently during thegrowth.

The Kinetics of Chirality Assignment in Catalytic Single Walled Carbon Nanotube Growth