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Purity assessment of multiwalled carbon nanotubes by Raman spectroscopy
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10.1063/1.2712152
/content/aip/journal/jap/101/6/10.1063/1.2712152
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/6/10.1063/1.2712152

Figures

Image of FIG. 1.
FIG. 1.

(a) Field emission SEM image of relative 100% MWNT sample at magnification , (b) TEM image of relative 100% MWNT sample showing concentric layers, and (c) TGA thermogram of relative 100% MWNT sample.

Image of FIG. 2.
FIG. 2.

Overlay of Raman intensity vs wavenumber of CVD nanocarbon, nanocarbon, graphite, and factor screening experiment MWNTs samples at an incident laser energy of . The , , and bands, used for the generation of calibration curves, are highlighted and the data are offset for clarity.

Image of FIG. 3.
FIG. 3.

Raman spectra for constructed sample set composed of MWNTs and nanocarbon at varying weight fractions. The incident laser energy was . The trends of the , , and bands can be seen in the highlighted regions, and the data are offset for clarity.

Image of FIG. 4.
FIG. 4.

Data points are the calculated ratios from spectra in Fig. 3. Data were fitted with linear and exponential approximations indicated by the dashed lines. The calibration equations established from the fits are for calculating purity values.

Image of FIG. 5.
FIG. 5.

Field emission SEM images of the four (A, B, C, D) MWNT samples of the factor screening experiment. The magnifications are .

Tables

Generic image for table
Table I.

Experimental parameters and purity values from each of the generated calibration curves for the samples of the factor screening experiment.

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/content/aip/journal/jap/101/6/10.1063/1.2712152
2007-03-22
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Purity assessment of multiwalled carbon nanotubes by Raman spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/6/10.1063/1.2712152
10.1063/1.2712152
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