Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 13: Solid-liquid interfaces
O 13.9: Vortrag
Montag, 27. März 2006, 17:00–17:15, WIL C207
In-plane structure of liquid 8CB layers confined between mica sheets — •Harald Reichert1, Thomas Becker2, Helmut Rathgen3, and Frieder Mugele3 — 1MPI for Metal Research, 70569 Stuttgart — 2Universität Ulm, 89081 Ulm — 3University of Twente, 7500 AE Enschede, NL
The ongoing miniaturization of both microelectromechanical and microfluidic devices creates an increasing interest in transport properties of liquids near solid-liquid interfaces and in confinement. For simple liquids confined between atomically smooth solid substrates, it has been shown that the molecules arrange into layers parallel to the surfaces. The question whether the structure of thin confined liquid layers changes from a liquid-like structure (for thicker layers) to a more solid-like structure (monolayer regime) is highly controversial. Direct measurements of the in-plane structure of thin confined liquid layers have not been performed up to now.
We have developed a new x-ray diffraction setup which allows us to study the in-plane structure of liquid layers as a function of temperature. We present the first results of time and temperature dependent measurements of the in-plane structure of liquid crystal 8CB confined between two mica sheets.