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Inner- and outer-wall sorting of double-walled carbon nanotubes

Li, Han 1; Gordeev, Georgy; Wasserroth, Sören; Chakravadhanula, Venkata Sai Kiran 1; Neelakandhan, Shyam Kumar Chethala 1; Hennrich, Frank 1; Jorio, Ado; Reich, Stephanie; Krupke, Ralph 1; Flavel, Benjamin Scott 1
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Double-walled carbon nanotubes (DWCNTs) consist of two coaxially aligned single-walled carbon nanotubes (SWCNTs), and previous sorting methods only achieved outer-wall electronic-type selectivity. Here, a separation technique capable of sorting DWCNTs by semiconducting (S) or metallic (M) inner- and outer-wall electronic type is presented. Electronic coupling between the inner and outer wall is used to alter the surfactant coating around each of the DWCNT types, and aqueous gel permeation is used to separate them. Aqueous methods are used to remove SWCNT species from the raw material and prepare enriched DWCNT fractions. The enriched DWCNT fractions are then transferred into either chlorobenzene or toluene using the copolymer PFO–BPy to yield the four inner@outer combinations of M@M, M@S, S@M and S@S. The high purity of the resulting fractions is verified by absorption measurements, transmission electron microscopy, atomic force microscopy, resonance Raman mapping and high-density field-effect transistor devices.

DOI: 10.1038/nnano.2017.207
Zitationen: 32
Zitationen: 34
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Institut für Nanotechnologie (INT)
Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 02.10.2017
Sprache Englisch
Identifikator ISSN: 1748-3387, 1748-3395
KITopen-ID: 1000076133
HGF-Programm 43.21.03 (POF III, LK 01) Carbon Nanosystems
Erschienen in Nature nanotechnology
Verlag Nature Research
Nachgewiesen in Dimensions
Web of Science
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