Experimental and theoretical study of the influence of the state of dispersion of graphene on the percolation threshold of conductive graphene/polystyrene nanocomposites

E. Tkalya, M.G. Ghislandi, R.H.J. Otten, M. Lotya, A. Alekseev, Paul Schoot, van der, J. Coleman, G. With, de, C.E. Koning

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Abstract

The effect of the dispersed state of graphene is studied as a factor influencing the electrical percolation threshold of graphene/polystyrene nanocomposites. We find the percolation threshold of our nanocomposites, prepared with graphene dispersions with different thermodynamic stabilities, degrees of exfoliation, and size polydispersities, to range from 2 to 4.5 wt %. Connectedness percolation theory is applied to calculate percolation thresholds of the corresponding nanocomposites, based on the premise that size polydispersity of graphene platelets in the corresponding solutions must have a strong influence on it. Theory and experimental results agree qualitatively.
Original languageEnglish
Pages (from-to)15113-15121
Number of pages9
JournalACS Applied Materials & Interfaces
Volume6
Issue number7
DOIs
Publication statusPublished - 2014

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