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Issue 35, 2016
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Synthesis of ultralow density 3D graphene–CNT foams using a two-step method

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Abstract

Here, we report a highly scalable two-step method to produce graphene foams with ordered carbon nanotube reinforcements. In our approach, we first used solution assembly methods to obtain graphene oxide foam. Next, we employed chemical vapor deposition to simultaneously grow carbon nanotubes and thermally reduce the 3D graphene oxide scaffold. The resulting structure presented increased stiffness, good mechanical stability and oil absorption properties. Molecular dynamics simulations were carried out to further elucidate failure mechanisms and to understand the enhancement of the mechanical properties. The simulations showed that mechanical failure is directly associated with bending of vertical reinforcements, and that, for similar length and contact area, much more stress is required to bend the corresponding reinforcements of carbon nanotubes, thus explaining the experimentally observed enhanced mechanical properties.

Graphical abstract: Synthesis of ultralow density 3D graphene–CNT foams using a two-step method

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Publication details

The article was received on 26 May 2016, accepted on 08 Aug 2016 and first published on 09 Aug 2016


Article type: Communication
DOI: 10.1039/C6NR04252J
Citation: Nanoscale, 2016,8, 15857-15863
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    Synthesis of ultralow density 3D graphene–CNT foams using a two-step method

    S. Vinod, C. S. Tiwary, L. D. Machado, S. Ozden, R. Vajtai, D. S. Galvao and P. M. Ajayan, Nanoscale, 2016, 8, 15857
    DOI: 10.1039/C6NR04252J

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