Mark tubes are commonly used as capillaries for high-precision small/wide-angle X-ray scattering (SAXS/WAXS) measurements. For empty capillaries made of fused silica and borosilicate glass, an anisotropic, intensity-varying, and position-dependent contribution of scatter has been observed. This contribution increases from the bulk scatter level with decreasing q-value for q ⪅ 0.3 nm-1 Surface scattering from nanostructures is thought to be the cause of this effect. These are created by the thermal forming processes from the bulk glasses. SAXS/WAXS, micro computed tomography, atomic force microscopy/scattering-type scanning near-field microscope, scanning electron microscope/energy dispersive X-ray spectroscopy, and dark-field light microscopic images are taken to qualify commercially available Mark tubes. In an intensive comparison with the literature of known surface structuring effects during the processing of fused silica and borosilicate glass, conclusions are drawn about their formation during the individual steps of the manufacturing process. As a result, a model for q ≈ 0–17 nm-1 is given to describe the scattering background and a possibility to reduce the surface scattering. This would enable the measurement of nanoparticles with SAXS at a lower concentration, or lower contrast, and with the same radiation dose.
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CC BY 4.0 ; Creative Commons Attribution 4.0 License
Themenbereich der Metrologie
Photometrie und Radiometrie
Zitierung
Illemann, J., Kästner, B., & Ruhz, A. (2025). Influence of capillary's surface scattering for small‐angle x‐ray scattering measurements. Physica Status Solidi A, 222(14), 2400645-1–2400645-10. https://doi.org/10.1002/pssa.202400645
