Dresden 2017 – scientific programme
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DS: Fachverband Dünne Schichten
DS 44: Postersession II
DS 44.5: Poster
Thursday, March 23, 2017, 17:00–19:00, P1C
Diffusion in thin films — •Max Wolff1, Gunnar Palsson1, Anton Devishvili1, Joe Dura2, and Boris Toperverg3 — 1Department for Physics and Astronomy, Uppsala University, Sweden — 2National Institute for Standards and Technology, Gaithersburg, MD, USA — 3Ruhr-University Bochum, Bochum, Germany
A surface imposes a singularity to materials, and with decreasing size of objects such as in nano-technology, they can dominate the physical properties. One apparent example of a surface effect is the reduction of the freezing temperature of ice in the surface layers, which allows skiing or skating on ice. Reflectometry is a powerful tool to explore interfaces and surfaces. More recently grazing incidence scattering techniques attracted more and more interest and in particular grazing incidence small angle scattering becomes more widely used to probe the interfacial structure of e.g. polymer systems. In the case of neutrons many studies suffer from limited incident flux. This applies even more for the case of neutron spectroscopy offering unique opportunities to probe dynamics in materials.
In this presentation the opportunities and challenges of gracing incidence neutron spectroscopy will be evaluated. Wave field enhancement in a potential well to access the study of dynamics in thin films and surfaces might be one possibility to overcome the limitations in neutron flux. The method will be discussed on the example of a thin film of vanadium loaded with hydrogen.