Boron-mediated growth of long helicity-selected carbon nanotubes
(1999) Physical Review Letters — Vol. 83, n° 24, p. 5078-5081 (1999)
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- Abstract
- We investigate the growth of B-doped carbon nanotubes combining experimental and theoretical techniques. Electron microscopy observations and electron diffraction patterns reveal that B doping considerably increases the length of carbon tubes and leads to a remarkable preferred zigzag chirality. These findings are corroborated by first-principles static add dynamical simulations which indicate that, in the zigzag geometry, B atoms act as a surfactant during growth, preventing tube closure. This mechanism does not extend to armchair tubes, suggesting a helicity selection during growth.
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Blase, X., Charlier, J.-C., De Vita, A., Car, R., Redlich, P., Terrones, M., Hsu, W., Terrones, H., Carroll, D., & Ajayan, P. M. (1999). Boron-mediated growth of long helicity-selected carbon nanotubes. Physical Review Letters, 83(24), 5078-5081. https://doi.org/10.1103/PhysRevLett.83.5078 (Original work published 1999)