The mechanical properties of nanotube bundles are limited by the sliding of individual nanotubes across each other. Introducing crosslinks between the nanotubes by electron irradiation prevents sliding, and leads to dramatic improvements in strength.
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Ajayan, P., Banhart, F. Strong bundles. Nature Mater 3, 135–136 (2004). https://doi.org/10.1038/nmat1078
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DOI: https://doi.org/10.1038/nmat1078
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