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date: 16 October 2021

Abstract and Keywords

This article describes the identification and separation of metallic and semiconducting carbon nanotubes according to their electric properties. It first provides an overview of the electronic structure of nanotubes, focusing on how their metallic and semiconducting properties arise. It then considers the most widely used characterization techniques used in determining metallic or semiconducting behavior, including Raman spectroscopy and photoluminescence measurements. It also discusses specific chirality-selective growth techniques, physical postgrowth selection methods, enrichment by chirality-sensitive chemical reactions, and modification of transport properties without change in chirality. The article concludes with a review of some applications of metallic and semiconducting carbon nanotubes as transparent conductive coatings.

Keywords: carbon nanotubes, electric properties, electronic structure, metallic properties, semiconducting properties, Raman spectroscopy, chemical reactions, transport properties, chirality, transparent conductive coatings

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