Raman spectroscopy of carbon nano-particles synthesized by laser ablation of graphite in water

• J.F. Cardenas ^[1] ; T. Cadenbach ^[1] ; C.-B- Zhang ^[3] ; C. Costa-Vera ^[1] ; A. Debut ^[2] ; A.V. Vaca ^[2] ; S.-L. Zhang ^[3] ; J.L. Paz ^[1]
  1. [1] Escuela Politécnica Nacional

     Escuela Politécnica Nacional

     Quito, Ecuador

     
  2. [2] Escuela Politécnica del Ejército

     Escuela Politécnica del Ejército

     Sangolqui, Ecuador

     
  3. [3] Institutionen for teknikvetenskaper, Fasta tillst ¨ andets elektronik, Uppsala

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• Localización: Revista Mexicana de Física, ISSN-e 0035-001X, Vol. 63, Nº. 1, 2017, págs. 71-75
• Idioma: inglés
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• Resumen

  • 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 µm) graphite particles removed from the surface are essentially unmodified (in structure and topology) by the laser as confirmed by Raman analysis.