Optical Studies on Multiwalled Carbon Nanotubes via Modified Wolff-Kishner Reduction Process

Abstract:

Multiwalled carbon nanotubes (MWCNTs) have been successfully synthesized by using a relatively simple method, known as modified Wolff-Kishner reduction process. Transmission electron microscopy (TEM) has shown the as-prepared MWCNTs possess straight morphologies with average inner and outer diameters, between 2 to 7 nm and 5 to 15 nm, respectively. Ultraviolet-visible (UV-Vis) absorption measurement has been conducted for the first time. The correlation between energy of the π plasmon absorbance (E_π) and nanotube diameter (dCNT) for the as-prepared MWCNTs shows contradiction to the empirical relationship as Eπ = 4.8 + 0.7 / (d_CNT)². Other optical characteristics like transmittance, reflectance and refraction index also have been studied. This work explores the optical property of the as-prepared MWCNTs and thus provides better understanding about the feasibility of this synthesis technique.

• Periodical: Advanced Materials Research (Volumes 194-196)
• Pages: 618-624
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.194-196.618
• Online since: February 2011
• Authors: Kim Han Tan, Bey Fen Leo, Meng Nee Ng, Roslina Ahmad, Mohd Rafie Johan
• Keywords: Multi-Walled Carbon Nanotube (MWCNT), Optical Property, Reduction Process, TEM, Ultraviolet-Visible Spectroscopy (UV-VIS)

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