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

Laudenbach J, Schmid D, Herziger F, Frank H, Kappes M, Muoth M, Haluska M, Hof F, Backes C, Hauke F, Hirsch A, Maultzsch J (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2017

Journal

Carbon Elsevier

Publisher: PERGAMON-ELSEVIER SCIENCE LTD

Book Volume: 112

Pages Range: 1-7

DOI: 10.1016/j.carbon.2016.10.065

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.

Authors with CRIS profile

Ferdinand Hof Lehrstuhl für Organische Chemie II Claudia Backes Exzellenz-Cluster Engineering of Advanced Materials (EAM) Frank Hauke Zentralinstitut für Neue Materialien und Prozesstechnik Andreas Hirsch Lehrstuhl für Organische Chemie II Janina Maultzsch Lehrstuhl für Experimentalphysik

Involved external institutions

Karlsruhe Institute of Technology (KIT) DE Germany (DE) Eidgenössische Technische Hochschule Zürich (ETHZ) / Swiss Federal Institute of Technology in Zurich CH Switzerland (CH) Technische Universität Berlin DE Germany (DE)

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://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: Download