RT Journal Article
T1 Vibrational emission analysis of the CN molecules in laser-induced breakdown spectroscopy of organic compounds
A1 Fernández-Bravo, Ángel
A1 Delgado-Pérez, Tomás
A1 Lucena Navarro, Patricia
A1 Laserna-Vázquez, José Javier
K1 Espectroscopia
AB Laser-induced breakdown spectroscopy (LIBS) of organic materials is based on the analysis of atomic and ionic emission lines and on a few molecular bands, the most important being the CN violet system and the C2 Swan system. This paper is focused in molecular emission of LIBS plasmas based on the CN (B2Σ–X2Σ) band, one of the strongest emissions appearing in all carbon materials when analyzed in air atmosphere. An analysis of this band with sufficient spectral resolution provides a great deal of information on the molecule, which has revealed that valuable information can be obtained from the plume chemistry and dynamics affecting the excitation mechanisms of the molecules. The vibrational emission of this molecular band has been investigated to establish the dependence of this emission on the molecular structure of the materials. The paper shows that excitation/emission phenomena of molecular species observed in the plume depend strongly on the time interval selected and on the irradiance deposited on the sample surface. Precise time resolved LIBS measurements are needed for the observation of distinctive CN emission. For the organic compounds studied, larger differences in the behavior of the vibrational emission occur at early stages after plasma ignition. Since molecular emission is generally more complex than that involving atomic emission, local plasma conditions as well as plume chemistry may induce changes in vibrational emission of molecules. As a consequence, alterations in the distribution of the emissions occur in terms of relative intensities, being sensitive to the molecular structure of every single material.
PB Elsevier
YR 2013
FD 2013
LK https://hdl.handle.net/10630/45264
UL https://hdl.handle.net/10630/45264
LA eng
NO Á. Fernández-Bravo, T. Delgado, P. Lucena, J.J. Laserna. Vibrational emission analysis of the CN molecules in laser-induced breakdown spectroscopy of organic compounds. Spectrochim. Acta Part B, 89 (2013), pp. 77-83
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 25 abr 2026