ABSTRACT
The behaviour of both acoustic and optical phonons in graphene and single-walled carbon nanotubes (SWCNTs) forms an important part of our understanding of these materials and ability to characterize them. For instance, it is the behaviour of the low-frequency, out-of-plane acoustic phonons in graphene that leads to the material having a negative thermal expansion coefficient (Chapter 10), and the observation of several Raman-active phonons in graphene and SWCNTs that allows the use of Raman spectroscopy as a quick and non-destructive method to measure parameters such as the thickness of graphene samples and the diameter of SWCNTs (Chapter 7).
