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

Journal article
(Original article)


Publication Details

Author(s): Laudenbach J, Schmid D, Herziger F, Frank H, Kappes M, Muoth M, Haluska M, Hof F, Backes C, Hauke F, Hirsch A, Maultzsch J
Journal: Carbon
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 2017
Volume: 112
Pages range: 1-7
ISSN: 0008-6223
Language: English


Abstract


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 Authors / FAU Editors

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


How to cite

APA:
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

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

BibTeX: 

Last updated on 2018-09-06 at 17:10