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Effectiveness of sorting single-walled carbon nanotubes by diameter using polyfluorene derivatives

✍ Scribed by J. Gao; M. Kwak; J. Wildeman; A. Herrmann; M.A. Loi

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
597 KB
Volume
49
Category
Article
ISSN
0008-6223

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✦ Synopsis

Semiconducting single-walled carbon nanotubes (SWCNTs) sorted by conjugated polymers are of great interest for electronic and optoelectronic applications. Here we demonstrate by optical methods that the selectivity of conjugated polymers for semiconducting SWCNTs is influenced by the structure of their side-chains and/or the molecular weight of the macromolecules, and that side chain functionalities determine the solubility in different dispersion media. Moreover, high resolution time-resolved photoluminescence measurements provide evidence of energy transfer from tubes with larger band gaps compared to those with smaller band gaps coexisting in SWCNT bundles.

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## Abstract Current methods for the synthesis of single‐walled nanotubes (SWNTs) produce mixtures of semiconducting (sem‐) and metallic (met‐) nanotubes. Most approaches to the chemical separation of sem‐/met‐SWNTs are based on small neutral molecules or conjugated aromatic polymers, which characte