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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis of ultralow density 3D graphene-CNT foams using a two-step method

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Author(s):
Vinod, Soumya ; Tiwary, Chandra Sekhar ; Machado, Leonardo D. ; Ozden, Sehmus ; Vajtai, Robert ; Galvao, Douglas S. ; Ajayan, Pulickel M.
Total Authors: 7
Document type: Journal article
Source: NANOSCALE; v. 8, n. 35, p. 15857-15863, SEP 21 2016.
Web of Science Citations: 21
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. (AU)

FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC