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

G. Cunningham, M. Lotya, N. McEvoy, G.S. Duesberg, P.P.A.M. Schoot, van der, J.N. Coleman

Research output: Contribution to journalArticleAcademicpeer-review

65 Citations (Scopus)
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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%.
Original languageEnglish
Pages (from-to)6260-6264
Number of pages5
JournalSpecial Publication - Royal Society of Chemistry
Volume4
Issue number20
DOIs
Publication statusPublished - 2012

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