Carbon nanotubes (CNTs) are one of the strongest known materials. When assembled into fibres, however, their strength becomes impaired by defects, impurities, random orientations and discontinuous lengths. Fabricating CNT fibres with strength reaching that of a single CNT has been an enduring challenge. Here, we demonstrate the fabrication of CNT bundles (CNTBs) that are centimetres long with tensile strength over 80 GPa using ultralong defect-free CNTs. The tensile strength of CNTBs is controlled by the Daniels effect owing to the non-uniformity of the initial strains in the components. We propose a synchronous tightening and relaxing strategy to release these non-uniform initial strains. The fabricated CNTBs, consisting of a large number of components with parallel alignment, defect-free structures, continuous lengths and uniform initial strains, exhibit a tensile strength of 80 GPa (corresponding to an engineering tensile strength of 43 GPa), which is far higher than that of any other strong fibre.
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Zhang, R., Zhang, Y. & Wei, F. Horizontally aligned carbon nanotube arrays: growth mechanism, controlled synthesis, characterization, properties and applications. Chem. Soc. Rev. 46, 3661–3715 (2017).
Appell, D. Stairway to the heavens. Phys. World 24, 30–34 (2011).
Chae, H. G. & Kumar, S. Rigid‐rod polymeric fibers. J. Appl. Polym. Sci. 100, 791–802 (2006).
MInus, M. & Kumar, S. The processing, properties, and structure of carbon fibers. J. Miner. Met. Mater. Soc. 57, 52–58 (2005).
Peng, B. et al. Measurements of near-ultimate strength for multiwalled carbon nanotubes and irradiation-induced crosslinking improvements. Nat. Nanotech. 3, 626–631 (2008).
Zhang, R. et al. Superstrong ultralong carbon nanotubes for mechanical energy storage. Adv. Mater. 23, 3387–3391 (2011).
Zhao, Q. Z., Nardelli, M. B. & Bernholc, J. Ultimate strength of carbon nanotubes: a theoretical study. Phys. Rev. B 65, 144105 (2002).
Zhang, R., Zhang, Y. & Wei, F. Controlled synthesis of ultralong carbon nanotubes with perfect structures and extraordinary properties. Acc. Chem. Res. 50, 179–189 (2017).
Wang, Y., Wei, F., Luo, G., Yu, H. & Gu, G. The large-scale production of carbon nanotubes in a nano-agglomerate fluidized-bed reactor. Chem. Phys. Lett. 364, 568–572 (2002).
Ren, Z. et al. Synthesis of large arrays of well-aligned carbon nanotubes on glass. Science 282, 1105–1107 (1998).
Zhao, M.-Q. et al. Embedded high density metal nanoparticles with extraordinary thermal stability derived from guest–host mediated layered double hydroxides. J. Am. Chem. Soc. 132, 14739–14741 (2010).
Ding, L., Yuan, D. & Liu, J. Growth of high-density parallel arrays of long single-walled carbon nanotubes on quartz substrates. J. Am. Chem. Soc. 130, 5428–5429 (2008).
Wen, Q. et al. 100 mm long, semiconducting triple-walled carbon nanotubes. Adv. Mater. 22, 1867–1871 (2010).
Koziol, K. et al. High-performance carbon nanotube fiber. Science 318, 1892–1895 (2007).
Beese, A. M. et al. Key factors limiting carbon nanotube yarn strength: exploring processing–structure–property relationships. ACS Nano 8, 11454–11466 (2014).
Ericson, L. M. et al. Macroscopic, neat, single-walled carbon nanotube fibers. Science 305, 1447–1450 (2004).
Zhang, X. et al. Spinning and processing continuous yarns from 4‐inch wafer scale super‐aligned carbon nanotube arrays. Adv. Mater. 18, 1505–1510 (2006).
Zhang, R. et al. Growth of half-meter long carbon nanotubes based on Schulz–Flory distribution. ACS Nano 7, 6156–6161 (2013).
Liu, Y. et al. Flexible orientation control of ultralong single-walled carbon nanotubes by gas flow. Nanotechnology 20, 185601 (2009).
Zhang, R. et al. Optical visualization of individual ultralong carbon nanotubes by chemical vapour deposition of titanium dioxide nanoparticles. Nat. Commun. 4, 1727 (2013).
Eder, D. & Windle, A. H. Morphology control of CNT–TiO2 hybrid materials and rutile nanotubes. J. Mater. Chem. 18, 2036–2043 (2008).
Georgakilas, V. et al. Decorating carbon nanotubes with metal or semiconductor nanoparticles. J. Mater. Chem. 17, 2679–2694 (2007).
Zhang, R. et al. Superlubricity in centimetres-long double-walled carbon nanotubes under ambient conditions. Nat. Nanotech. 8, 912–916 (2013).
Zhang, D. et al. Multiple electronic Raman scatterings in a single metallic carbon nanotube. Phys. Rev. B 93, 245428 (2016).
Wu, W. et al. True-color real-time imaging and spectroscopy of carbon nanotubes on substrates using enhanced Rayleigh scattering. Nano Res. 8, 2721–2732 (2015).
Zhu, Z. et al. Acoustic-assisted assembly of an individual monochromatic ultralong carbon nanotube for high on-current transistors. Sci. Adv. 2, e1601572 (2016).
Ye, X., Zhao, L., Liang, J., Li, X. & Chen, G.-Q. Study of the tensile properties of individual multicellular fibres generated by Bacillus subtilis. Sci. Rep. 7, 46052 (2017).
Dresselhaus, M., Dresselhaus, G., Jorio, A., Souza Filho, A. & Saito, R. Raman spectroscopy on isolated single wall carbon nanotubes. Carbon 40, 2043–2061 (2002).
Zhang, Y. et al. Raman spectra variation of partially suspended individual single-walled carbon nanotubes. J. Phys. Chem. C 111, 1983–1987 (2007).
Chang, C.-C. et al. A new lower limit for the ultimate breaking strain of carbon nanotubes. ACS Nano 4, 5095–5100 (2010).
Chang, C.-C. et al. Strain-induced D band observed in carbon nanotubes. Nano Res. 5, 854–862 (2012).
Nakagawa, T. & Osaki, S. The discrete Weibull distribution. IEEE Trans. Rel. 24, 300–301 (1975).
Cohen, A. C. Maximum likelihood estimation in the Weibull distribution based on complete and on censored samples. Technometrics 7, 579–588 (1965).
Weibull, W. A statistical distribution function of wide applicability. J. Appl. Mech. 18, 293–297 (1951).
Chi, Z., Chou, T. W. & Shen, G. Determination of single fibre strength distribution from fibre bundle testings. J. Mater. Sci. 19, 3319–3324 (1984).
Zhou, Y., Wang, Y., Xia, Y. & Jeelani, S. Tensile behavior of carbon fiber bundles at different strain rates. Mater. Lett. 64, 246–248 (2010).
Daniels, H. E. The statistical theory of the strength of bundles of threads. Proc. R. Soc. Lond. A 183, 405–435 (1945).
Lan, C., Li, H. & Ju, Y. Bearing capacity assessment for parallel wire cables. China Civ. Eng. J. 46, 31–38 (2013).
Daniels, H. The maximum size of a closed epidemic. Adv. Appl. Prob. 6, 607–621 (1974).
Gollwitzer, S. & Rackwitz, R. On the reliability of Daniels systems. Struct. Saf. 7, 229–243 (1990).
MInus, M. & Kumar, S. The processing, properties, and structure of carbon fibers. JOM 57, 52–58 (2005).
Chae, H. G. & Kumar, S. Rigid-rod polymeric fibers. J. Appl. Polym. Sci. 100, 791–802 (2006).
Zhang, X. et al. Ultrastrong, stiff, and lightweight carbon-nanotube fibers. Adv. Mater. 19, 4198–4201 (2007).
Dalton, A. B. et al. Super-tough carbon-nanotube fibres. Nature 423, 703–703 (2003).
Yu, M.-F. et al. Strength and breaking mechanism of multiwalled carbon nanotubes under tensile load. Science 287, 637–640 (2000).
Yu, M. F., Files, B. S., Arepalli, S. & Ruoff, R. S. Tensile loading of ropes of single wall carbon nanotubes and their mechanical properties. Phys. Rev. Lett. 84, 5552–5555 (2000).
Filleter, T., Bernal, R., Li, S. & Espinosa, H. Ultrahigh strength and stiffness in cross‐linked hierarchical carbon nanotube bundles. Adv. Mater. 23, 2855–2860 (2011).
Wang, W. et al. Measurement of the cleavage energy of graphite. Nat. Commun. 6, 7853 (2015).
Li, Q., Kim, K.-S. & Rydberg, A. Lateral force calibration of an atomic force microscope with a diamagnetic levitation spring system. Rev. Sci. Instrum. 77, 065105 (2006).
Zhang, R. et al. Facile manipulation of individual carbon nanotubes assisted by inorganic nanoparticles. Nanoscale 5, 6584–6588 (2013).
This study was supported by the National Natural Science Foundation of China (grant no. 21636005), the Foundation for the National Basic Research Program of China (grant no. 2016YFA0200102), the NSFC (grant nos. 11227202, 1147215) and the National Basic Research Program of China (grant no. 2013CB934203). We thank R. H. Baughman for his advice on the manuscript. We also thank P. Shi, H. Wang and H. Xie for discussions.
The authors declare no competing interests.
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Bai, Y., Zhang, R., Ye, X. et al. Carbon nanotube bundles with tensile strength over 80 GPa. Nature Nanotech 13, 589–595 (2018). https://doi.org/10.1038/s41565-018-0141-z
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