AI Article Synopsis
- The research examined how exposure to the atmosphere affects the oxidation of Be/Al multilayer mirrors using depth-resolved X-ray photoelectron spectroscopy.
- A thicker layer of aluminum reduced the oxidation levels because it was less reactive, as revealed by the intensity ratio of metal to oxides.
- The analysis highlighted that the subsurface areas contained more metal-hydroxide bonds (BeOH/AlOH), while the surface regions were primarily composed of metal-oxide bonds (BeO/AlO).
Article Abstract
The quantification of surface and subsurface oxidation of Be/Al periodic multilayer mirrors due to exposure in the ambient atmosphere was investigated by depth-resolved X-ray photoelectron spectroscopy. The contribution of oxidation was lower for the thicker layer of Al in the periodic structures since the surface was less chemically reactive for the oxidation. This was investigated by finding the depth-resolved slope of the intensity ratio of metal/oxides (Be/BeO and Al/AlO) by analyzing the chemical shift of Al 1s and Be 1s photoelectrons. Furthermore, a well-resolved doublet chemical shift in the O 1s spectra indicated the formation of BeO/AlO and BeOH/AlOH oxides. The investigation showed that the subsurface and surface regions were dominated by metal-hydroxide (BeOH/AlOH) and metal-oxide (BeO/AlO) bonding, respectively, analyzed by the depth-resolved chemical shifts.
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| http://dx.doi.org/10.1039/d2cp04778k | DOI Listing |
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