Spectroscopic Investigation of Laser-Induced Graphene Plasma

In this paper, graphene plasma was obtained through the interaction of the fundamental radiation from a pulsed Nd:YAG laser at the fundamental wavelength of 1064 nm focused onto a solid plane of graphene material. This reaction was carried out under conditions of an atmospheric status. The resulting plasma was tested using an optical emission spectroscopy technique. The temperature of the electrons is calculated by the tow line ratio of C I and C II emission lines singly ionised, and the density of the plasma electron is calculated with Saha-Boltzmann equation. The upper limit of the electron temperature was approximately 1.544 eV. The corresponding electron density was 11.5×1015 cm-3. Then the electron temperature decreased when the energy was 300 mJ and it was near 1.462 eV, corresponding to the density of those electrons 8.7×1015 cm-3.