Bundle versus network conductivity of carbon nanotubes separated by type

  • Hajnalka M. Tóháti
  • Áron Pekker
  • Bálint Á. Pataki
  • Zsolt Szekrényes
  • Katalin Kamarás
Regular Article


We report wide-range optical investigations on transparent conducting networks made from separated (semiconducting, metallic) and reference (mixed) single-walled carbon nanotubes, complemented by transport measurements. Comparing the intrinsic frequency-dependent conductivity of the nanotubes with that of the networks, we conclude that higher intrinsic conductivity results in better transport properties, indicating that the properties of the nanotubes are at least as much important as the contacts. We find that HNO3 doping offers a larger improvement in transparent conductive quality than separation. Spontaneous dedoping occurs in all samples but is most effective in films made of doped metallic tubes, where the sheet conductance returns close to its original value within 24 h.


Mesoscopic and Nanoscale Systems 


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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Hajnalka M. Tóháti
    • 1
  • Áron Pekker
    • 1
  • Bálint Á. Pataki
    • 1
  • Zsolt Szekrényes
    • 1
  • Katalin Kamarás
    • 1
  1. 1.Institute for Solid State Physics and Optics, Wigner Research Centre for PhysicsHungarian Academy of SciencesBudapestHungary

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