Electronic transport in carbon nanotube ropes and mats

A. B. Kaiser, Y. W. Park, G. T. Kim, E. S. Choi, G. Düsberg, S. Roth

Research output: Contribution to journalConference articlepeer-review

65 Citations (Scopus)


We suggest that conduction in carbon nanotube ropes or mats is best understood in terms of a heterogeneous model, involving regions of metallic conduction together with hopping or tunnelling through small electrical barriers corresponding to defects of various types. Such a model gives a good account of the measured resistivity, in particular the crossover from nonmetallic to metallic sign for the resistivity temperature dependence seen in many samples, in analogy to our similar model for conducting polymers. In agreement with this model, the thermopower has been observed to be more metal-like than resistivity, but does show pronounced nonlinearities as a function of temperature. We investigate electron-phonon effects, density of states peaks, and semiconductor contributions as possible causes of these nonlinearities.

Original languageEnglish
Pages (from-to)2547-2550
Number of pages4
JournalSynthetic Metals
Issue number1-3
Publication statusPublished - 1999 Jun 24
Externally publishedYes
EventProceedings of the 1998 International Conference on Science and Technology of Synthetic Metals (ICSM-98) - Montpellier
Duration: 1998 Jul 121998 Jul 18

Bibliographical note

Funding Information:
We thank Matthias Mueller-Wehlau for assistancein digitizing data. This work was supportedb y the Ministry of Science and Technology, Korea, and by the European Communityt hrought he NAMlTECH Programme(G D andS R).

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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