Bundle vs. network conductivity of carbon nanotubes separated by type

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 t...

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Bibliographic Details
Published inarXiv.org
Main Authors Tohati, H M, Pekker, A, Pataki, B A, Szekrenyes, Zs, Kamaras, K
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.04.2014
Subjects
Conductivity
Nanotubes
Physics - Materials Science
Resistance
Single wall carbon nanotubes
Transport properties
Tubes
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Summary: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 hours.
ISSN:2331-8422
DOI:10.48550/arxiv.1302.3343