Open Access Nano Express

Studying the local character of Raman features of single-walled carbon nanotubes along a bundle using TERS

Niculina Peica*, Christian Thomsen and Janina Maultzsch

Author Affiliations

Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany

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Nanoscale Research Letters 2011, 6:174  doi:10.1186/1556-276X-6-174

Published: 25 February 2011

Abstract

Here, we show that the Raman intensity of the G-mode in tip-enhanced Raman spectroscopy (TERS) is strongly dependent on the height of the bundle. Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point. The frequency of the G- mode behaves differently in TERS as compared to far-field Raman. Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed.