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Title: Study of Carbon Nanotubes and Defect Concentration by Raman Spectroscopy Technique
???metadata.dc.contributor.*???: Dr. Chrnet Ammente
Muhiye, Seidu
Issue Date: Aug-2017
Publisher: Addis Ababa University
Abstract: CNTs are very thin materials made from carbon by rolling graphene sheets. Arc-discharge, laser ablation and chemical vapor deposition are well established techniques to prepare carbon nanotubes. Mostly purification is carried out by chemical oxidation, acid treatment and micro filtration techniques. Their nature, quality and properties examined by Scanning Electron Microscopy(SEM), Transmission Electron Microscopy(TEM), Atomic Force Microscopy (AFM), X-Ray Diffraction(XRD) and Raman Spectroscopy. CNTs have many technological applications due to their unique physical and chemical properties such as high conductivity, high strength, low weight and high aspect ratio. Carbon nanotubes (CNTs) attracts significantly attention of the scientific community because of their remarkable optical, electronic, thermal, mechanical and chemical characteristics. Raman spectroscopy is one of the most powerful tool to characterize the degree of disorder in sp2 carbon materials with band ratio ( ID IG ), of graphite powder, CNTs, and other allotropes of carbon. Thus, Raman spectroscopy determine the presence of crystalline, amorphus carbon and diameter of CNTs. In this project Raman spectra of graphite pristen sample is studied from available data. The result indicated that the intensity at certain frequency mode that corresponds to D-band is very large due to large amount of impurity content.
Description: A project Submitted to the Department of Physics Addis Ababa University In Partial Fulfillment of the Requirements for the Degree of Masters of Science in Physics
Appears in Collections:Thesis - Physics

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