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3. Application to surface characterization
The concept of surface is always difficult to define. In the case of a pure, perfectly prepared material, the surface can be considered as the region of the sample affected by the presence of an atmosphere, a medium or a vacuum. This very general but restrictive definition is used in specific fields (e.g. chemisorption, catalysis) where only high-resolution methods are used, generally under ultra-high vacuum. In the case of an industrial product, it is easy to see that its surface composition differs from its core composition to depths that are sometimes very great, requiring other means of investigation.
Generally speaking, industrial surfaces are highly complex, because at each stage of the process, the characteristics are linked not only to the last tool used, but also to the preceding stages. Even on the basis of a simplified schematic...
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Application to surface characterization
Characteristics of SDL compared with other surface analysis methods
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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