Abstract

CARDENAS, J.F. et al. Raman spectroscopy of carbon nano-particles synthesized by laser ablation of graphite in water. Rev. mex. fis. [online]. 2017, vol.63, n.1, pp.71-75. ISSN 0035-001X.

Carbon nanoparticles (CNPs) have been synthesized by laser ablation of polycrystalline graphite in water using a pulsed Nd:YAG laser (1064 nm) with a width of 8 ns. Structural and mesoscopic characterization of the CNPs in the supernatant by Raman spectroscopy provide evidence for the presence of mainly two ranges of particle sizes: 1-5 nm and 10-50 nm corresponding to amorphous carbon and graphite NPs, respectively. These results are corroborated by complementary characterization using atomic force microscopy (AFM) and transmission electron microscopy (TEM). In addition, large (10-100 $\mu$m) graphite particles removed from the surface are essentially unmodified (in structure and topology) by the laser as confirmed by Raman analysis.

Keywords : Raman spectroscopy; carbon nanoparticle; laser ablation; high resolution electron microscopy; atomic force microscopy.

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