Forschungszentrum Karlsruhe Gmbh

Karlsruher Institut Fur Technologie

Stefan Walheim

Thomas Schimmel

Steven Lenhert

Harald Fuchs

Roland Groeger

Falko Brinkmann

Thomas Laue

Matthias Barczewski

Marcel Mayor

Alfred Blaszczyk

Regine Hedderich

Roland Gröger

A die for the micro contact printing includes a die body and a die surface that is fixedly connected to the die body. The die surface is divided into at least two different regions. Each of the at least two regions comprises a different material having a different absorption capacity for printing ink. At least one of the at least two regions has a lateral dimension of no more than 1000 nanometers.

Stamp for micro contact printing and method for the production thereof

A method for detecting the presence of molecules includes bringing into contact with at least one optical grating comprised of a first liquid phase, a second liquid phase which cannot be mixed with the first liquid phase. The first liquid phase is arranged on a substrate in a form of periodic structures having a periodicity ranging from about 190 nm to about 10 &#x3bc;m. The molecules to be detected, which are capable of changing the optical characteristics of the at least one optical grating are added to the first liquid phase or to the second liquid phase either before, during or after the bringing step. The presence of molecules is detected by measuring a changed reflection or transmission of light at the at least one optical grating or a changing spatial course of the diffraction pattern as soon as the first liquid phase makes contact with the second liquid phase and with the molecules to be detected.

Method for demonstrating the presence of molecules by means of optical gratings

A method for producing an organometallic layer includes providing a substrate having at least a layer with atoms of an oxidizable metal on its surface. The surface is exposed to a fluid that includes organic molecules having at least two functional groups that contain elements of main group VI such that the atoms of the oxidizable metal form a bond with the organic molecules. By consumption of the atoms of oxidizable metal and of the organic molecules, the organometallic layer is formed on the substrate at locations on the surface of the substrate where the atoms of oxizable are disposed, the atoms of oxizable metal being incorporated into the organometallic layer. A thickness of the organometallic layer is determined by a duration of the exposing, a thickness of the layer including the atoms of the oxidizable metal, and the number of organic molecules in the fluid.

Method for producing an organometallic layer

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Weingarten, Germany

Stefan Walheim