physica status solidi (b)
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Editor: Stefan Hildebrandt (Editor-in-Chief), Sabine Bahrs (Deputy Editor)
Online ISSN: 1521-3951
Front Cover: All-optical structure assignment of individual single-walled carbon nanotubes from Rayleigh and Raman scattering measurements (Phys. Status Solidi B 12/2012)
Single-walled carbon nanotubes provide a paradigm of quasi one-dimensional nanomaterials and exhibit unique physical properties. In the zone-folding approach, the electronic properties of a nanotube can be derived from the two-dimensional band structure of graphene by considering the boundary conditions imposed by the diameter and the chiral angle. Consequently, a large variety of nanotube species with distinct physical properties can be formed. A popular illustration of this behavior is the existence of 1/3 of metallic species and 2/3 of semiconducting species. In order to uncover the relationship between the structural and electronic properties at the single nanotube level, fast and non-invasive characterization methods are needed. In their article on pp. 2436–2441, Berciaud et al. describe an all-optical approach based on a combination of elastic (Rayleigh) and inelastic (Raman) light scattering spectroscopies that allows for quantitative structure assignment of individual nanotubes. Rayleigh scattering probes the strong optical resonances, characteristic of a given species, while Raman scattering provides a measurement of the nanotube diameter through the radial-breathing mode frequency.