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Near-Infrared Absorbance of Single-Walled Carbon Nanotubes Dispersed in Dimethylformamide

Krupke, Ralph ; Hennrich, F. ; Hampe, Oliver ; Kappes, Manfred M. (2003)
Near-Infrared Absorbance of Single-Walled Carbon Nanotubes Dispersed in Dimethylformamide.
In: The Journal of Physical Chemistry B, 107 (24)
doi: 10.1021/jp034077w
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

Absorption spectra of single-walled carbon nanotubes (SWNT) dispersed in dimethylformamide (DMF) have been recorded in the visible to near-infrared range. Besides broad absorption bands, the spectra show a sharp peak at 5187 cm-1, which has been attributed in the literature to the absorption of semiconducting nanotubes with a band gap of 0.64 eV [Ausman et al. J. Phys. Chem. B 2000, 104, 8911]. On the basis of absorbance measurements for samples that show the sharp absorbance peak but do not contain SWNTs, we conclude that the origin of the peak at 5187 cm-1 is not due to semiconducting nanotubes but due to water present in the SWNT/DMF suspension. A comparative study of D2O in DMF reproduces a similar peak that is isotope-shifted into the near-infrared.

Typ des Eintrags: Artikel
Erschienen: 2003
Autor(en): Krupke, Ralph ; Hennrich, F. ; Hampe, Oliver ; Kappes, Manfred M.
Art des Eintrags: Bibliographie
Titel: Near-Infrared Absorbance of Single-Walled Carbon Nanotubes Dispersed in Dimethylformamide
Sprache: Englisch
Publikationsjahr: 24 Mai 2003
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The Journal of Physical Chemistry B
Jahrgang/Volume einer Zeitschrift: 107
(Heft-)Nummer: 24
DOI: 10.1021/jp034077w
Kurzbeschreibung (Abstract):

Absorption spectra of single-walled carbon nanotubes (SWNT) dispersed in dimethylformamide (DMF) have been recorded in the visible to near-infrared range. Besides broad absorption bands, the spectra show a sharp peak at 5187 cm-1, which has been attributed in the literature to the absorption of semiconducting nanotubes with a band gap of 0.64 eV [Ausman et al. J. Phys. Chem. B 2000, 104, 8911]. On the basis of absorbance measurements for samples that show the sharp absorbance peak but do not contain SWNTs, we conclude that the origin of the peak at 5187 cm-1 is not due to semiconducting nanotubes but due to water present in the SWNT/DMF suspension. A comparative study of D2O in DMF reproduces a similar peak that is isotope-shifted into the near-infrared.

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften
Hinterlegungsdatum: 08 Nov 2011 13:44
Letzte Änderung: 05 Mär 2013 09:55
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