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Low-density three-dimensional foam using self-reinforced hybrid two-dimensional atomic layers

Vinod, Soumya and Tiwary, Chandra Sekhar and Autreto, Pedro Alves da Silva and Taha-Tijerina, Jaime and Ozden, Sehmus and Chipara, Alin Cristian and Vajtai, Robert and Galvao, Douglas S and Narayanan, Tharangattu N and Ajayan, Pulickel M (2014) Low-density three-dimensional foam using self-reinforced hybrid two-dimensional atomic layers. In: NATURE COMMUNICATIONS, 5 .

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Official URL: http://dx.doi.org/ 10.1038/ncomms5541

Abstract

Low-density nanostructured foams are often limited in applications due to their low mechanical and thermal stabilities. Here we report an approach of building the structural units of three-dimensional (3D) foams using hybrid two-dimensional (2D) atomic layers made of stacked graphene oxide layers reinforced with conformal hexagonal boron nitride (h-BN) platelets. The ultra-low density (1/400 times density of graphite) 3D porous structures are scalably synthesized using solution processing method. A layered 3D foam structure forms due to presence of h-BN and significant improvements in the mechanical properties are observed for the hybrid foam structures, over a range of temperatures, compared with pristine graphene oxide or reduced graphene oxide foams. It is found that domains of h-BN layers on the graphene oxide framework help to reinforce the 2D structural units, providing the observed improvement in mechanical integrity of the 3D foam structure.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the NATURE PUBLISHING GROUP, MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 18 Sep 2014 09:11
Last Modified: 18 Sep 2014 09:11
URI: http://eprints.iisc.ac.in/id/eprint/49908

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