Characterization of Soot

Characterizing the age of ancient Egyptian manuscripts through micro‐Raman spectroscopy

“…(a) along with a plot of the residuals, matches quite closely the observed spectrum, although the fit is low in the region between the peaks and slightly underestimates the peak heights. This mismatch with the two‐peak model is also present in all other manuscripts of this study and has been noted previously in several reports …”

“…[30] We used a Gaussian lineshape for the D3 peak and Lorentz lineshapes for the D1 and G peaks following the practice of Sadezky [30] and others. [32,33,[38][39][40] These lineshapes gives better stability and a lower residual sum than other combinations of Lorentzian and Gaussian peaks. The three-peak model provides an eight-parameter description of the observed lineshapes: the widths and peak positions of the D1, G, and D3 spectral peaks and the relative peak intensities I D1 /I G and I D3 /I G .…”

“…Building on this extensive spectroscopic literature, we also analyzed our data by using a three‐peak model by using the designation D1 for the D band, centered around 1350 cm −1 , in the three‐peak analysis and adding a hypothetical additional peak, which we will designate D3 following the notation of Sadezky . We used a Gaussian lineshape for the D3 peak and Lorentz lineshapes for the D1 and G peaks following the practice of Sadezky and others . These lineshapes gives better stability and a lower residual sum than other combinations of Lorentzian and Gaussian peaks.…”

“…This mismatch with the two-peak model is also present in all other manuscripts of this study and has been noted previously in several reports. [17,32,33] Many researchers have discussed the spectral features of the carbon black two-peak model presented earlier in terms of the D and G bands that are understood in detail for graphite [18,23] and for graphene. [24,26,34] In many practical cases, however, researchers have found it necessary to include additional spectroscopic features in the region near 1550 cm À1 .…”

An Old but Lively Nanomaterial: Exploiting Carbon Black for the Synthesis of Advanced Materials

“…Eurasian Chemico-Technological Journal 21 (2019) 203-213 CB are composed almost exclusively by elemental carbon (> 95 wt.%) with a variable quantity of hydrogen, oxygen, and sulfur (less than 1% each); usually the hydrogen to carbon atomic ratio (H/C) is less than 0.05 [2,10]. Trace amounts of organic compounds (polycyclic aromatic hydrocarbons and aliphatic/aromatic hydrocarbons) and inorganic impurities (salts of alkali and alkaline earth metals) as manufacturing residuals can be also found [10].…”