Study about characterization of CNTs through electron microscopy and Raman spectroscopy

Abstract

Carbon nanotubes were produced by arc discharging process. Morphology and characteristics of carbon nanotubes were investigated through electron microscopy and Raman spectroscopy. Electron microscope reveals different shape and size, typical branching phenomena, randomly oriented, entangle CNTs and agglomerated CNTs. Raman spectroscopy reveals the deficiency of RBM (radial breathing mode), D-band corresponds to disorder band of graphitic structure and G-band corresponds to E2g mode of carbon atoms. Moreover, the ratio of ID/IG was found to be 0.24, which is attributed to high purity and crystalline in nature. Raman spectroscopy also exhibits G' band attributed to overtone of D band, which furnish typical characteristics of different graphene layers.