科研之友
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摘要
We propose the quantitative method of evaluating the purity of multiwall carbon nanotubes( MWCNTs) using Raman spectroscopy. High purity MWCNTs were prepared by chemical vapor deposition (CVD) to be used as a reference material with 100% purity. Since the intensity and wavenumber of D ''-band located at around 1500 cm(-1) were found to be independent of the excitation wavelength of a laser, the purity of MWCNTs was measured by comparing the intensity ratio of D ''-band to G-band (I-D ''/I-G) of the sample with that of a reference material. The established method was verified by testing the mixture of amorphous carbon particles and reference MWCNTs.
- 出版日期2013
