Diameter dependence of the defect-induced Raman modes in functionalized carbon nanotubes

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Details zur Publikation

Autor(en): Laudenbach J, Schmid D, Herziger F, Frank H, Kappes M, Muoth M, Haluska M, Hof F, Backes C, Hauke F, Hirsch A, Maultzsch J
Zeitschrift: Carbon
Jahr der Veröffentlichung: 2017
Band: 112
Seitenbereich: 1-7
ISSN: 0008-6223
Sprache: Englisch


Covalent functionalization of single-walled carbon nanotubes typically leads to an intensity increase of the defect-induced Raman mode (D mode). A large intensity ratio of the D and G modes (D/G ratio) is therefore often used as evidence for a successful functionalization. Here, we discuss the effect of the D mode resonance on the D/G ratio and compare pristine and covalently functionalized nanotubes. By resonance Raman spectroscopy we study the evolution of the lineshape and frequencies of the D and 2D modes of samples enriched with semiconducting and metallic nanotubes in comparison with the radial breathing mode. First, we experimentally demonstrate the dependence of the D- and 2D-mode frequencies on the tube diameter and derive an analytical expression for both frequencies as a function of the diameter and the optical transition. Furthermore, we demonstrate that the contribution of the D and 2D modes for small SWCNTs disappears in covalently functionalized samples due to partial destruction. In fact, this can change the measured D/G ratio significantly and has a fundamental impact on the determination of the degree of SWCNT functionalization by Raman spectroscopy. (C) 2016 Elsevier Ltd. All rights reserved.

FAU-Autoren / FAU-Herausgeber

Backes, Claudia Dr. rer. nat.
Exzellenz-Cluster Engineering of Advanced Materials
Hauke, Frank Dr.
Zentralinstitut für Neue Materialien und Prozesstechnik
Hirsch, Andreas Prof. Dr.
Lehrstuhl für Organische Chemie II
Hof, Ferdinand
Lehrstuhl für Organische Chemie II
Maultzsch, Janina Prof. Dr.
Lehrstuhl für Experimentalphysik

Autor(en) der externen Einrichtung(en)
Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich
Karlsruhe Institute of Technology (KIT)
Technische Universität Berlin


Laudenbach, J., Schmid, D., Herziger, F., Frank, H., Kappes, M., Muoth, M.,... Maultzsch, J. (2017). Diameter dependence of the defect-induced Raman modes in functionalized carbon nanotubes. Carbon, 112, 1-7. https://dx.doi.org/10.1016/j.carbon.2016.10.065

Laudenbach, Jan, et al. "Diameter dependence of the defect-induced Raman modes in functionalized carbon nanotubes." Carbon 112 (2017): 1-7.


Zuletzt aktualisiert 2018-10-08 um 22:55