Raman spectroscopy has been shown to be an important tool in studies of single and multilayer graphene: it is sensitive to the details of the crystal structure, defects, doping and changes of the material under chemical treatment and as the number of layers increases. In all the leading graphene research groups, Raman forms a crucial core technique. In Exeter, as well as providing a valuable non-invasive method to distinguish monolayer graphene from bilayers and multilayers, we will study the Raman spectrum as a function of the size of the current passing through, and therefore the temperature of, the graphene monolayer. We will also investigate the Raman spectrum using a wide variety of lasers, ranging from 325 nm to 785 nm. We expect the intensity of the various Raman peaks in the spectrum to be sensitive to the incoming photon energy. We also plan to extend these studies to other similar monolayer materials.