Dresden 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 16: Interfaces and Thin Films II

CPP 16.7: Vortrag

Dienstag, 1. April 2014, 11:15–11:30, ZEU 114

An X-ray reflectivity set-up for the study of solid/liquid interfaces under high hydrostatic pressure — Florian J. Wirkert, •Julia Nase, Benedikt Nowak, Irena Kiesel, Simon Kujawski, Johannes Möller, Paul Salmen, Michael Paulus, Christian Sternemann, and Metin Tolan — Fakultät Physik/DELTA, TU Dortmund, 44221 Dortmund Germany.

Studying the response of matter to high hydrostatic pressure (HHP) has a long tradition. The knowledge on life at extreme conditions can be broadened if biological systems are investigated under HHP. The importance for studying biological systems at conditions up to 5 kbar lies also in the fact that biologically relevant proteins denature in this pressure regime.

We present the first set-up for in situ X-ray reflectivity studies (XRR) of solid/liquid interfaces at HHP up to 5 kbar [1]. With this new set-up, it is now possible to examine a number of different solid/liquid interfaces unter HHP with Angström-resolution. In addition, the influence of a modified water structure (under HHP) on interfaces can be explored.

We present results concerning the structure of hydrophobic interface between OTS and water and discuss first XRR measurements of pressure-induced lysozyme adsorption on hydrophobic silicon wafers. The results demonstrate the enormous potential of the set-up, particularly for the study of biological systems.

[1] F. Wirkert et al, XRR measurements of liquid/solid interfaces at HHP conditions, J. Synchr. Rad. 21 (2014)