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A team from University College London in Great Britain and dr. Gašper Kokot from the Complex matter department at „Jožef Stefan“ Institute have published an article titled [[ https://doi.org/10.1002/adfm.202212660 | Fabrication of High-Aspect Ratio Nanogratings for Phase-Based X-Ray Imaging ]] in Advanced Functional Materials. Diffractive optical elements such as periodic gratings are fundamental devices in X-ray imaging – a technique that medical, material science, and security scans rely upon. They developed a new method for lamellar structure fabrication with nanoscale pitch and microscale height with aspect ratios of more than 40. Their excellent diffractive abilities were demonstrated at a synchrotron facility. Besides succesfull aplication of these structures in the context of X-ray diffraction gratings, they theoretically explored physical limitations of the method and stability of such structures in general. Production of such lamellae is important for a range of applications from sensors, batteries, solar cells, superhydrophobic surfaces to mechano-bactericidal materials.