Dresden 2014 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.10: Poster

Thursday, April 3, 2014, 15:00–19:00, P2

A high pressure cell for x-ray reflectivity measurements of liquid/solid interfaces and lipid layers — •Paul Salmen, Julia Nase, Benedikt Nowak, Michael Paulus, Florian J. Wirkert, and Metin Tolan — Fakultät Physik/DELTA, Technische Universität Dortmund, 44221 Dortmund, Germany

We present a high pressure cell for in situ x-ray reflectivity (XRR) measurements[1]. By applying high hydrostatic pressures (HHP) up to 5 kbar, the liquid/solid interface can be studied. The cell consists of two separated parts, an outer cell to withstand the pressure and an inner cell with a separated volume containing the sample. As solid interface, silicon wafers, which can be covered by different coatings, are used.

In the near future, we want to measure adsorption of proteins at lipid layers under HHP. Lipid capsules play a mayor role for example in food processing and drug delivery. To study a simplified system, we spin-coat layers of glycerol tristearate on silicon wafers. Here we present first XRR measurements

[1] F. J. Wirkert et al., Journal of Synchrotron Radiation 2014 (21) doi:10.1107/S1600577513021516