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Issue 20, 2012
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Percolation scaling in composites of exfoliated MoS2 filled with nanotubes and graphene

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Abstract

Applications of films of exfoliated layered compounds in many areas will be limited by their relatively low electrical conductivity. To address this, we have prepared and characterised composites of a nano-conductor (nanotubes or graphene) embedded in a matrix of exfoliated MoS2 nanosheets. Solvent exfoliation of MoS2 nanosheets, followed by blending with dispersions of graphene or nanotubes allowed the formation of such composite films by vacuum filtration. This gave spatially uniform mixtures with fully tuneable nano-conductor content. By addition of the nano-conducting phase, it was possible to vary the electrical conductivity of the composite over nine orders of magnitude. For both filler types the conductivity followed percolation scaling laws both above and below the percolation threshold. In the case of SWNT-filled composites, conductivities as high as ∼40 S m−1 were achieved at volume fractions as low as ∼4%.

Graphical abstract: Percolation scaling in composites of exfoliated MoS2 filled with nanotubes and graphene

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Publication details

The article was received on 09 Jul 2012, accepted on 28 Aug 2012 and first published on 29 Aug 2012


Article type: Communication
DOI: 10.1039/C2NR31782F
Nanoscale, 2012,4, 6260-6264

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    Percolation scaling in composites of exfoliated MoS2 filled with nanotubes and graphene

    G. Cunningham, M. Lotya, N. McEvoy, G. S. Duesberg, P. van der Schoot and J. N. Coleman, Nanoscale, 2012, 4, 6260
    DOI: 10.1039/C2NR31782F

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