期刊
APPLIED SURFACE SCIENCE
卷 257, 期 12, 页码 5452-5455出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2010.11.112
关键词
Laser ablation; Laser-induced breakdown spectroscopy; Atmospheric pressure plasma torch; Radiofrequency plasma; Oxide materials; Polymers
类别
资金
- Austrian Federal Ministry of Economy, Family and Youth
- National Foundation for Research, Technology and Development (Christian Doppler Laboratory LAD)
- Romanian Ministry of Education, Research and Innovation [CNCSIS-UEFISCSU]
Laser-induced breakdown spectroscopy method is modified using an external radiofrequency (RF) plasma jet that overlaps spatially with the laser-induced plasma. Short UV laser pulses (wavelength 193 nm) are employed to ablate iron oxide ceramics, zinc oxide ceramics and polyethylene pressed pellets in ambient air background. An RF generator (frequency 13.56 MHz, power <= 1kW) and a gas nozzle system are employed to generate a continuous jet of argon and nitrogen plasma expanding into air. The optical emission of the overlapped plasma is analyzed using an Echelle spectrometer equipped with an intensified CCD camera. The time dependence of optical emission intensities and of plasma parameters is investigated by varying the spectrometer delay time with respect to the laser pulse. The emission intensities of major (Fe, Zn) and minor (Mn, Al) elements are moderately increased with the RF plasma jet (<= 2x). The intensities of atomic lines and molecular bands from ablated polymer material are increased also. (C) 2010 Elsevier B.V. All rights reserved.
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