Characterization of carbon nanotube-metal oxide materials

5 Characterization of carbon nanotube-metal oxide materials 

To confirm the structure and quality of produced carbon nanotube and metal oxide hybrid materials, there are four characterization techniques that are normally used. These techniques are described in the following subsections. 

Raman spectroscopy is a spectral measurement based on inelastic scattering of monochromatic radiation. When a molecule is irradiated with an intense monochromatic light (usually a laser source),photons excite the molecule from the ground state to a virtual energy state. The photons are re-emitted when the molecule relaxes. The frequency of the re-emitted photons shifts in comparison with the original monochromatic light frequency. This shift provides information about vibrational, rotational, and other low frequency transitions in molecules. Information from Raman spectroscopy is summarized in Rg. 11.4. 

Raman spectroscopy was used to confirm the existence of CNTs in a MOX film. Raman spectra of an SWNT/C03O4 film are displayed in Fig. 11.5. The 

Changes in frequency of Raman peak Polarizafion of Widfh of Raman peak Raman peak infensify of Raman peak  

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