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Temporal evolution study of the plasma induced by CO2 pulsed laser on targets of titanium oxides

AuthorsDíaz Sol, Luis ; Camacho, J. J.; Sanz, M. ; Hernández, Margarita ; Jandova, V.; Castillejo, Marta
KeywordsTime-resolved optical emission spectroscopy
High-power IR CO2 pulsed laser
Time of flight measurement
Titanium oxides
Laser induced breakdown spectroscopy
Issue Date2013
CitationSpectrochimica Acta - Part B: Atomic Spectroscopy 86: 88- 93 (2013)
AbstractThis paper reports studies on time-resolved laser induced breakdown spectroscopy (LIBS) of plasmas induced by IR nanosecond laser pulses on the titanium oxides TiO and TiO2 (anatase). LIBS excitation was performed using a CO2 laser. The laser-induced plasma was found strongly ionized yielding Ti+, O+, Ti2 +, O 2 +, Ti3 +, and Ti4 + species and rich in neutral titanium and oxygen atoms. The temporal behavior of specific emission lines of Ti, Ti+, Ti2 + and Ti3 + was characterized. The results show a faster decay of Ti3 + and Ti 2 + ionic species than that of Ti+ and neutral Ti atoms. Spectroscopic diagnostics were used to determine the time-resolved electron density and excitation temperatures. Laser irradiation of TiO 2-anatase induces on the surface sample the polymorphic transformation to TiO2-rutile. The dependence on fluence and number of irradiation pulses of this transformation was studied by micro-Raman spectroscopy. © 2013 Elsevier B.V.
Identifiersdoi: 10.1016/j.sab.2013.06.002
issn: 0584-8547
Appears in Collections:(CFMAC-IFF) Artículos
(CFMAC-IEM) Artículos
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