Table 3
Spectral characteristics of the deconvoluted bands of the Raman spectra of the three soot samples.
| Label | Spec. charac. | Sample 1 | Sample 2 | Sample 3 |
|
|
||||
| D4 | ν | 1176 | 1190 | 1175 |
| FWHM | 77 | 90 | 56 | |
| A | 0.08 | 0.13 | 0.08 | |
| D1’ | ν | 1269 | – | – |
| FWHM | 103 | – | – | |
| A | 0.24 | – | – | |
| D1 | ν | 1372 | 1340 | 1337 |
| FWHM | 143 | 125 | 116 | |
| A | 1.51 | 2.23 | 2.59 | |
| D3 | ν | 1505 | 1529 | 1544 |
| FWHM | 50 | 136 | 114 | |
| A | 0.04 | 0.38 | 0.45 | |
| G | ν | 1600 | 1600 | 1600 |
| FWHM | 67 | 46 | 39 | |
| A | 0.85 | 0.73 | 0.71 | |
| D2 | ν | 1618 | 1616 | 1617 |
| FWHM | 24 | 24 | 23 | |
| A | 0.15 | 0.27 | 0.29 | |
| 2*D1 | ν | 2720 | 2674 | 2669 |
| FWHM | 300 | 256 | 230 | |
| A | 1.01 | 0.87 | 0.9 | |
| G+D1 | ν | 2960 | 2927 | 2922 |
| FWHM | 238 | 225 | 203 | |
| A | 0.98 | 1.16 | 1.23 | |
| 2*G | ν | 3204 | 3203 | 3200 |
| FWHM | 135 | 89 | 87 | |
| A | 0.29 | 0.18 | 0.18 | |
Notes. Peak positions, ν, are in cm-1, while FWHMs in cm-1 and A are relative integrated area. The uncertainties in position are about ± 3 cm-1 for the main bands (± 6 cm-1 for the weaker ones) and about 10% for the FWHMs, according to the fitting routines. The intensities are normalised by the sum of the intensities of the D2 and G bands in order to overcome the poorly constrained fit for those two bands. The uncertainties of the relative intensities are about 10% for the main bands and larger for the weaker ones.
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