Ultrastrong, stiff, and lightweight carbon-nanotube fibers

Xiefei Zhang, Qingwen Li, Terry G. Holesinger, Paul N. Arendt, Jianyu Huang, P. Douglas Kirven, Timothy G. Clapp, Raymond F. DePaula, Xiazhou Liao, Yonghao Zhao, Lianxi Zheng, Dean E. Peterson, Yuntian Zhu

Research output: Contribution to journalArticlepeer-review

432 Scopus citations


Carbon nanotube fibers with values for specific strength and specific stiffness that are much higher than values reported for any current engineering fibers were reported. The CNT fibers's density was determined using two methods, both of which yielded a consistent value of (0.2±0.01) g cm -3. The first method involved calculating the fiber density from the density of individual CNTs inside the fiber, whereas the second method involved measuring the weight of CNT fibers using a quartz crystal microbalance. The tensile strength and stiffness of the fibers were measured in the range 1.35 to 3.3 GPa and 100 to 263 GPa, using the initial fiber diameter, which was directly measured using a laser diffraction method. The results suggested that the specific strength and specific stiffness properties can be significantly improved by using more longer CNT arrays and by improving the packing density of CNTs in the fiber.

Original languageBritish English
Pages (from-to)4198-4201
Number of pages4
JournalAdvanced Materials
Issue number23
StatePublished - 3 Dec 2007


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