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Inferring the energy sensitivity and band gap of electronic transport in a network of carbon nanotubes
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Inferring the energy sensitivity and band gap of electronic transport in a network of carbon nanotubes
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Journal Article
Inferring the energy sensitivity and band gap of electronic transport in a network of carbon nanotubes
2022
Overview
Since the industrialization of single-phase nanomaterial-based devices is still challenging, intensive research focus has been given to complex materials consisting of multiple nanoscale entities, including networks and matrices of nanowires, nanotubes, nanoribbons, or other large molecules; among these complex materials, networks of carbon nanotubes are a typical example. Detailed knowledge of the energy sensitivity and band gap of electronic transport in such a material system is difficult to detect, despite its importance in electronic, energetic and sensing applications. Here, we propose a new methodology to obtain these quantities using the measured Seebeck coefficient at a certain temperature but different Fermi levels. We discover that the network consisting of semiconducting
(11,10)
-carbon nanotubes actually exhibits metallic transport at room temperature. It is also interesting to verify that intrananotube ballistic transport is dominant over diffusive scattering by long-range disorder, as well as the quantum hopping resistance at the contact points. The transport asymmetry ratio between the holes and electrons (1.75) is similar to the value observed in pristine graphene samples (1.50).
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
