Raman scattering is the inelastic scattering of light that provides the chemical and structural information of a liquid or crystal. A Raman spectrum is a plot of the intensity of Raman scattered radiation as a function of its frequency difference from the incident radiation. This difference in frequency is called Raman shift. Raman spectroscopy is widely used for studying carbon nanotube - length and diameter, whether nanotubes are single- walled or multi-walled, isolated or bundle, conduction type of semiconducting or metallic and even chirality.
Published in Chapter:
Principles of Raman Scattering in Carbon Nanotubes
K. A. Shah (Govt. Degree College for Women, Anantnag, India) and M. A. Shah (Department of Physics, National Institute of Technology, Srinagar, India)
Copyright: © 2014
|Pages: 15
DOI: 10.4018/978-1-4666-5824-0.ch006
Abstract
Carbon nanotubes have attracted the scientific community throughout the world, and in the past decade, a lot of work has been reported related with synthesis, characterization, and applications of carbon nanotubes. This chapter is written for readers who are not familiar with the basic principles of Raman spectroscopy in carbon nanotubes. The structure of carbon nanotubes, types of the carbon nanotubes, Brillouin zone of carbon nanotubes, and band structure of carbon nanotubes are discussed at length, which will serve as foundation for the study of Raman scattering in carbon nanotubes. The Density of States (DOS) of single walled carbon nanotubes are illustrated by an example which will encourage readers to calculate the DOS of any type of carbon nanotube. The Raman modes of vibration are discussed, and Raman spectroscopic analysis is presented by considering the typical spectra of single-walled carbon nanotubes.