Nanoscale carbon materials are very interesting to a broad range of applications in the field of surface and material science. Each vibration mode of Raman and FT-IR spectra correspond to a specific vibration frequency of a bond in the core and surface of crystal, so it is highly sensitive to morphology, implying that every band is very sensitive to the orientation of the bonds and atomic weight at either end of the bond. Thus in this study we apply the Raman and FT-IR spectroscopies to study the relative content of carbon-carbon bonds to the anhydrous and weakly aggregated elementary nanoscale carbon particles of detonation nanodiamond. One position of Raman bands at around 1300 cm-1 manifested that there are highly uniform C-C bonds in a tetrahedral crystal field environment like the case of diamond. The other position at around 1600 cm-1 would be indicative of a hexagonal sheet like graphite. By analyzing the relative content of carbon bonds by using the area of intensity of Raman peak and the simulation of crystal morphology, we suggest that there are mainly two kinds of C-C bonds, one is sp3 bonds of diamond and the other is sp2 bonds of graphite. Also we study the surface structure of fumed nanodiamond by using the FT-IR spectra and the TEM images.

Carbon bond structure in fumed nanodiamonds

256th National Meeting (2018)

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