2. Definition of a surface analysis
Depending on the discharge conditions, it is possible to create craters with flat, concave or convex bottoms. In the case of metallic samples, a concave crater can be obtained by working under low source impedance, i.e. at relatively high pressure. Conversely, a convex crater can be obtained by working under high impedance, i.e. at relatively low pressure. The optimization consists in working between these two extremes to obtain a crater with as flat a bottom as possible (figure 11 ), which is necessary to ensure good depth resolution in surface characterizations.
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Definition of a surface analysis
Application to surface characterization
Bibliography
Event
"GD day", international LDS conference, every two years (even-numbered years)
Standards and norms
- ISO Surface chemical analysis – Glow discharge optical emission spectrometry (GD-OES) – Introduction to use. - ISO 14707 -
- ISO Surface chemical analysis – Analysis of zinc and/or aluminium based metallic coatings by glow-discharge optical-emission spectrometry. - ISO 16962 -
Patents
Glow discharge spectrometric measurement of an organic or polymeric solid sample. EP 24434275A1.
Device example
Features of the Horiba Jobin-Yvon GD-Profiler 2 spectrometer
The device is built around a 47-channel simultaneous polychromator with a 2,400 tr/mm double-order concave holographic grating, 0.5 m focal length and 18 to 25 pm resolution in the 110 to 600 nm spectral range. In the UV, the elements measured are H (and D, deuterium, an isotope of H), O, C, N, Cl, Br, I.
The optical...
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