Type

Journal Article

Authors

Niall Mcevoy
Paul van der Schoot
Georg Duesberg
Mustafa Lotya
Jonathan Coleman
Graeme Cunningham

Subjects

Engineering

Topics
electrical conductivity nanotubes composites exfoliated nanosheets composite films nanoscience materials solvent exfoliation films scaling graphene filled composites percolation

Percolation scaling in composites of exfoliated MoS 2 filled with nanotubes and graphene (2012)

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 MoS 2 nanosheets. Solvent exfoliation of MoS 2 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%
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Full list of authors on original publication

Niall Mcevoy, Paul van der Schoot, Georg Duesberg, Mustafa Lotya, Jonathan Coleman, Graeme Cunningham

Experts in our system

1
Niall Mcevoy
Trinity College Dublin
Total Publications: 54
 
2
Georg Duesberg
Trinity College Dublin
Total Publications: 116
 
3
Mustafa Lotya
Trinity College Dublin
Total Publications: 19
 
4
Jonathan Coleman
Trinity College Dublin
Total Publications: 217