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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