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In this work, the process of iron oxidation (corrosion) is extensively investigated by LIBS. At first, several identical samples were polished and heated at certain temperatures. A Nd:YAG laser beam(150 mj/pulse) was focused through a quartz lens on the targets to generate a microplasma whose radiation was detected by CCD spectrograph. The emission lines due to the excited oxygen and Fe atoms are...
In this work, an irxadiance chamber is used to study LIBS of several gaseous samples such as air, pure Ar, N2 and SF6 in different pressures by means of a fundamental harmonic of Nd:YAG laser and CCD spectrograph. Delay time and repetition rate are set 1mus and 5Hz. Plasma temperature was extracted from Boltzmann equation and the corresponding electron density was estimated using stark broadening...
The irradiation of ArF excimer laser (193nm) on Si wafer (〈111〉, n-type, arsenic-doped, 0.01Ωcm) in SF 6 atmosphere, from vacuum to 1000mbar, creates a regular self-assembled microstructure owning to a great number of microconical spikes covered with SiF 2 (fluorosilyl) layer containing sulfur impurities. The geometry of microstructure as well as the layer thickness varies with the...
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