Figure 1
From: Synthesis of diamond-like phase from graphite by ultrafast laser driven dynamical compression
On the left are shown the Raman spectra and on the right the respective SEM images.
(a) and (b) refer to the polycrystalline graphite (precursor). (c) and (d) correspond to the laser-modified surface and in (c), the thicker red curve is the measured Raman spectrum and the gray ones are its component bands obtained from Voigt functions fittings. (e) and (f) present the measurements for the laser-created structure (the corresponding optical image is shown in the Figure S1 of the Supplementary Information, which also shows the Raman spectra for two other laser created particles). Clear morphological differences are noted between the precursor and the laser modified materials. The raw graphite contains disordered and buckled flakes (b). In (d) the material features micrometer sized globular formations composed by nanometer sized structures. Stacked layers resulting from shockwaves dynamic compressed carbon produce the structure shown in (e).
