Study of Carbon Nanotubes and Defect Concentration by Raman Spectroscopy Technique
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Date
2017-08
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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
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Keywords
Raman Spectroscopy Technique