Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Karlheinz Graf"'
Publikováno v:
Nanoscale and Microscale Thermophysical Engineering. 11:31-41
The evaporation of micro droplets plays an important role in many technical application fields. However, the physico-chemical laws governing the evaporation process in different types of droplet systems are still not fully understood. An intergrated
Publikováno v:
ACS applied materialsinterfaces. 7(29)
In this work, we explore the ability of utilizing hydrogels synthesized from a temperature-sensitive polymer and a polyelectrolyte to desalinate salt water by means of reversible thermally induced absorption and desorption. Thus, the influence of the
Publikováno v:
The Journal of Physical Chemistry B. 110:17918-17924
We study how a local air plasma treatment affects the mechanical properties of polystyrene by performing indentation measurements on the polymer in the elastic and plastic regime. The local exposure to plasma was obtained by placing a shadow-mask wit
Publikováno v:
Microelectronic Engineering. 83:819-822
Persistent surface morphologies in extruded polymer substrates can be generated in a first step by projecting a mask with argon ions and, secondly, by a consecutive exposure to solvent. In the first step, the polymer is locally cross-linked as a cons
Publikováno v:
European Polymer Journal. 40:975-980
A technique is presented for manufacturing surface microstructures on polymer substrates. It is based on the uptake of solvent vapors by a prestructured polymer, selective swelling, and the flow of the softened polymer. Prestructuring is done by evap
Autor:
Karlheinz Graf, Rainer Jordan, Oliver Purrucker, Motomu Tanaka, Giovanni Schiavon, Anton Förtig
Publikováno v:
Macromolecular Symposia. 210:329-338
Stable lipid membranes with controlled substrate-membrane spacing can be prepared using well-defined lipopolymers as a tether. Based on the living cationic ring-opening polymerization of 2-methyl- or 2-ethyl-2-oxazoline, lipopolymers can be synthesiz
Publikováno v:
Langmuir. 18:3585-3591
Polyelectrolyte adsorption onto an oppositely charged interface is determined by electrostatic and secondary interactions. Since polyelectrolytes precipitate at elevated temperatures, the secondary interactions are presumably temperature dependent. T
Autor:
Andreas Dietzel, Rüdiger Berger, Wilhelm H. Brünger, Yogesh Karade, Karlheinz Graf, Sascha A. Pihan
Publikováno v:
Langmuir, 25(5), 3108-3114. American Chemical Society
The irradiation of polymer surfaces with ion beams leads to pronounced chemical and physical modifications when the ions are scattered at the atoms in the polymer chain. In this way, different products of decomposition occur. Here we show that by cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cfd661fc762120e33b317eab616db508
https://research.tue.nl/nl/publications/9ce532b2-2a10-4f10-9c26-4e428c0be33d
https://research.tue.nl/nl/publications/9ce532b2-2a10-4f10-9c26-4e428c0be33d
Publikováno v:
Microelectronic Engineering, 84(5-8), 797-801. Elsevier
We present a technique to fabricate polymer substrates with locally structured surfaces in the nanometer scale. By ion projection direct cross-linking the surface of a stretched polymer is locally cross-linked and afterwards annealed above the glass
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fc1e1048e2461d8ff2ab32effba82c9
https://publica.fraunhofer.de/handle/publica/213393
https://publica.fraunhofer.de/handle/publica/213393
Autor:
Karlheinz Graf, Elmar Bonaccurso
Publikováno v:
Langmuir : the ACS journal of surfaces and colloids. 20(25)
Plasma treatment of polymer surfaces is used to control the generation of topological surface structures: stripes, starlike morphologies, and pinnacles in the range from 100 nm up to several micrometers. These protrusions arise when the plasma-treate