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Photonic Sorting of Aligned, Crystalline Carbon Nanotube Textiles

Bulmer, John S.; Gspann, Thurid S.; Orozco, Francisco; Sparkes, Martin; Koerner, Hilmar; Di Bernardo, A.; Niemiec, Arkadiusz; Robinson, J. W. A.; Koziol, Krzysztof K.; Elliott, James A.; O’Neill, William

Floating catalyst chemical vapor deposition uniquely generates aligned carbon nanotube (CNT) textiles with individual CNT lengths magnitudes longer than competing processes, though hindered by impurities and intrinsic/extrinsic defects. We present a photonic-based post-process, particularly suited for these textiles, that selectively removes defective CNTs and other carbons not forming a threshold thermal pathway. In this method, a large diameter laser beam rasters across the surface of a partly aligned CNT textile in air, suspended from its ends. This results in brilliant, localized oxidation, where remaining material is an optically transparent film comprised of few-walled CNTs with profound and unique improvement in microstructure alignment and crystallinity. Raman spectroscopy shows substantial D peak suppression while preserving radial breathing modes. This increases the undoped, specific electrical conductivity at least an order of magnitude to beyond that of single-crystal graphite. Cryogenic conductivity measurements indicate intrinsic transport enhancement, opposed to simply removing nonconductive carbons/residual catalyst.

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Verlagsausgabe §
DOI: 10.5445/IR/1000122464
Veröffentlicht am 07.08.2020
DOI: 10.1038/s41598-017-12605-y
Zitationen: 8
Web of Science
Zitationen: 8
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2017
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000122464
Erschienen in Scientific reports
Verlag Nature Research
Band 7
Heft 1
Seiten Art.-Nr.: 12977
Vorab online veröffentlicht am 11.10.2017
Nachgewiesen in Web of Science
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