Tuning electrical and thermal connectivity in multiwalled carbon nanotube buckypaper

We find that the electrical and thermal connectivity in multiwalled carbon nanotube buckypaper can be tuned using a spark plasma sintering (SPS) technique. Elevated SPS temperatures promote the formation of inter-tube connections and consequently impact the electrical resistivity, thermoelectric pow...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2010-08, Vol.22 (33), p.334215-334215
Main Authors: Yang, Keqin, He, Jian, Puneet, Pooja, Su, Zhe, Skove, Malcolm J, Gaillard, Jay, Tritt, Terry M, Rao, Apparao M
Format: Article
Language:English
Subjects:
Condensed matter
Electric Conductivity
Electrical resistivity
Heat transfer
Materials Testing
Multi wall carbon nanotubes
Nanotubes, Carbon - chemistry
Nanotubes, Carbon - ultrastructure
Particle Size
Spark plasma sintering
Temperature
Thermal Conductivity
Thermoelectricity
Tuning
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Summary:We find that the electrical and thermal connectivity in multiwalled carbon nanotube buckypaper can be tuned using a spark plasma sintering (SPS) technique. Elevated SPS temperatures promote the formation of inter-tube connections and consequently impact the electrical resistivity, thermoelectric power and thermal conductivity of the buckypaper. In particular, the electrical resistivity as a function of SPS temperature exhibits a percolation-type behavior while the low temperature lattice thermal conductivity shows a crossover behavior in the sample dimensionality. The results are discussed in terms of the quasi-one-dimensional metallic nature of multiwalled carbon nanotubes, the packing density and the electron-phonon coupling.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/22/33/334215