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Issue 7, 2015
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Tuning carbon nanotube assembly for flexible, strong and conductive films

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Abstract

Carbon nanotubes are ideal scaffolds for designing and architecting flexible graphite films with tunable mechanical, electrical and thermal properties. Herein, we demonstrate that the assembly of aligned carbon nanotubes with different aggregation density and morphology leads to different mechanical properties and anisotropic electrical conduction along the films. Using drying evaporation under tension treatment, the carbon nanotubes can be assembled into strong films with tensile strength and Young's modulus as high as 3.2 GPa and 124 GPa, respectively, leading to a remarkable toughness of 54.38 J gāˆ’1, greatly outperforming conventional graphite films, spider webs and even Kevlar fiber films. Different types of solvents may result in the assembly of CNTs with different aggregation morphology and therefore different modulus. In addition, we reveal that the high density assembly of aligned CNTs correlates with better electric conduction along the axial direction, enabling these flexible graphite films to be both strong and conductive.

Graphical abstract: Tuning carbon nanotube assembly for flexible, strong and conductive films

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Publication details

The article was received on 30 Oct 2014, accepted on 24 Dec 2014 and first published on 26 Dec 2014


Article type: Paper
DOI: 10.1039/C4NR06401A
Citation: Nanoscale, 2015,7, 3060-3066
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    Tuning carbon nanotube assembly for flexible, strong and conductive films

    Y. Wang, M. Li, Y. Gu, X. Zhang, S. Wang, Q. Li and Z. Zhang, Nanoscale, 2015, 7, 3060
    DOI: 10.1039/C4NR06401A

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