Effect of percolation on thermal transport in nanotube composites

The effective thermal conductivity of two-dimensional (2D) nanocomposites composed of carbon nanotubes (CNTs) dispersed in a host substrate is simulated to quantify the role of tube percolation on the thermal transport. The model is in excellent agreement with a 2D effective medium theory for low tu...

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Veröffentlicht in:Applied physics letters 2007-03, Vol.90 (10), p.104105-104105-3
Hauptverfasser: Kumar, S., Alam, M. A., Murthy, J. Y.
Format: Artikel
Sprache:eng
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Zusammenfassung:The effective thermal conductivity of two-dimensional (2D) nanocomposites composed of carbon nanotubes (CNTs) dispersed in a host substrate is simulated to quantify the role of tube percolation on the thermal transport. The model is in excellent agreement with a 2D effective medium theory for low tube densities, but departs significantly from it when tube-tube interaction becomes significant. It is found that percolation effects may play a role for tube-tube and tube-substrate thermal resistance parameters typical of CNT composites. They are quantified in terms of a conductivity exponent for a range of governing parameters.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.2712428