Dresden 2017 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Colloids and Complex Fluids

CPP 18.14: Poster

Montag, 20. März 2017, 18:30–21:00, P1C

Structure and Dynamics of Confined Liquids Studied by an X-ray Surface Force Apparatus — •Henning Weiss1, Julian Mars1,2, Hailong Li1, Hsiu-Wei Cheng3, Sadhanaa Buvaneswaran3, Claudia Merola3, Veijo Honkimaeki4, Markus Valtiner3, and Markus Mezger1,21Max-Planck-Institut für Polymerforschung, Mainz, Germany — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Germany — 3Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany — 4ESRF-European Synchrotron, Grenoble, France

Confined liquids play an important role in many technical applications and processes. Recent studies on the performance of batteries and capacitors showed that electrochemical and catalytic processes are highly sensitive to the molecular scale liquid structure adjacent to interfaces. Thus, a detailed knowledge of the structure of confined liquids on molecular length scale is of great interest for fundamental and applied sciences. To study confined structures under dynamic conditions we constructed a novel in-situ X-ray surface force apparatus (X-SFA). This device can create a precisely controlled slit pore confinement down to molecular dimensions. The normal load between the apposing interfaces can be modulated to study the structure and dynamics of confined liquids. The in-plane structure of the liquid parallel to the slit pore and density profiles perpendicular to the confining interfaces were studied by X-ray scattering and reflectivity. Relaxation processes were studied by bringing the system out of equilibrium by external stress.

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