Dresden 2011 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: Poster: New Instruments and Methods
CPP 11.13: Poster
Monday, March 14, 2011, 17:30–19:30, P2
A new set-up for fast reflectivity measurements at BL9 of DELTA — •Florian Wirkert, Julia Nase, Michael Paulus, Christian Sternemann, Sebastian Tiemeyer, and Metin Tolan — Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund
We report on a new setup for fast reflectivity measurements at beamline 9 of DELTA. A PILATUS-100k detector with a sensitive area of 83.8×33.5 mm2 and a high dynamic range allows to obtain a complete reflectivity on a single TIFF image. The main difference to classical reflectivity measurements is that the detector remains fixed at its position while the sample is tilted continuously from 0∘ to an angle θmax. As first test measurements we investigated the adsorption of the protein lysozyme at the solid-liquid interface between a silicon wafer and water. In a sequence of reflectivities taking 55 s each, we could demonstrate the temporal evolution of protein adsorption at a solid-liquid interface. Thus this set-up provides a strong tool for the investigation of time-dependent processes by x-ray reflectivity measurements.