We carried out in situ resistivity measurements on macroscopic oriented ropes of single wall carbon nanotubes in a transmission electron microscope. We have found a minimum in the resistivity as a function of irradiation dose. This minimum is interpreted as a result of a twofold effect of the irradiation: the domination of covalent bond formation between tubes in a bundle due to broken bonds in the tube walls and the amorphization of the sample at high dose. Despite this improvement, the temperature dependence of the resistivity remains hopping-like.
Effect of electron irradiation on the electrical properties of fibers of aligned single-walled carbon nanotubes
Cs. Mikó, M. Milas, J. W. Seo, E. Couteau, N. Barišić, R. Gaál, L. Forró; Effect of electron irradiation on the electrical properties of fibers of aligned single-walled carbon nanotubes. Appl. Phys. Lett. 1 December 2003; 83 (22): 4622–4624. https://doi.org/10.1063/1.1631060
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