Soumya, V. and Tiwary, C.S. and Silva Autreto, P. and Taha-Tijerina, J. and Ozden, S. and Chipara, A.C. and Vajtai, R. and Galvao, D.S. and Narayanan, T.N. and Ajayan, P.M. (2014) Low-density three-dimensional foam using self-reinforced hybrid two-dimensional atomic layers. Nature Communications, 5. pp. 4541-4550. ISSN 2041-1723

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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:	Article
Uncontrolled Keywords:	Low-density three-dimensional foam; hybrid; two-dimensional atomic layers
Subjects:	Functional Materials Electrochemical Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	15 May 2015 09:27
Last Modified:	15 May 2015 09:27
URI:	http://cecri.csircentral.net/id/eprint/3149

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