CH – Page 4 – TechConnect Briefs

Magnetic assisted self-assembly

Furlan M., Lattuada M., ETH Zürich, CH

In this work, we introduce a new technique to produce anisotropic porous materials called magnetic assisted self-assembly. This method takes advantage of the alignment in the presence of a magnetic field of non-magnetic colloidal nanoparticles, [...]

Color tunable nanophosphors

Sotiriou G.A., Schneider M., Pratsinis S.E., Particle Technology Laboratory, ETH Zürich, CH

In this study, yttrium oxide nanophosphors doped with Tb and Eu ions were made by flame aerosol technology. The emission color of these nanophosphors could be precisely tuned from green to red by tuning the [...]

Wet organometallic chemistry for palladium nanoparticles synthesis performed in an organic media and under supercritical conditions in microreactors

Desportes S., Tidona B., von Rohr Ph.R., ETH Zürich, CH

Nanoparticles are been produced in a microreactor under different operating conditions, spefically under supercritical CO2. The known organometallic chemistry is been used to create Pd-nanoparticles. Compared to the batch process the processing time could be [...]

Surface modification of powders and nanostructure deposition in the afterglow of a low power barrier discharge at atmospheric pressure

Sonnenfeld A., Reichen P., von Rohr Ph.R., ETH Zürich, CH

The precipitation of solid-state sphere-like nanostructures from an organosilicon precursor at atmospheric pressure is investigated in the prospect of the improvement of powder flowability by the attachment of nanoscopic spacers to the powder particles surfaces. [...]

Plasmonic Biosensors with biocompatible nanosilver

Sotiriou G.A., Sannomiya T., Teleki A., Voeroes J., Pratsinis S.E., Particle Technology Laboratory, ETH Zürich, CH

In this study, silica-coated nanosilver particles were made by flame aerosol technology. The effect of the silica coating on the morphology of the particles, as well as their biocompatibility was examined. Finally, the potential of [...]

Nanoscale Plasma Surface Modification of Powders

Roth C., Sonnenfeld A., von Rohr Ph.R., ETH Zürich, CH

New results of the plasma surface modification of fine-grained temperature sensitive particles are presented. Nanoparticles are deposited on larger substrate particles in a specially designed plasma chamber to improve the macroscopic powder properties as flowability [...]

Advanced In- and Out-off plane High Resolution X-ray Strain Analysis on MEMS

Neels A., Dommann A., CSEM, CH

Related to the dramatically smaller volume of microelectromecanical systems (MEMS), new methods in testing and qualification are needed. In single crystal silicon (SCSi) based devices, stress and loading in operation introduces defects during the MEMS [...]

In-situ MEMS Testing

Dommann A., Neels A., Schifferle A., Mazza E., CSEM, CH

In microsystems technology, new methods in testing and qualification are needed related to the dramatically smaller volume of microelectromecanical systems (MEMS). In single crystal silicon (SCSi) based devices, stress and loading in operation introduces defects [...]

Structural Control of Porous Polymeric Materials through Magnetic Gelation

Furlan M., Lattuada M., Morbidelli M., ETH Zürich, CH

A novel procedure, called magnetic gelatio, is introduced to prepare porous polymeric materials with controlled anisotropic structure. The materials are obtained by destabilizing aqueous dipsersions of magnetic polymer nanoparticles in the presence of magnetic fields, [...]

Correlation between the oxygen content and the structure of AlCrSiOxN(1-x) thin films deposited by pulsed DC magnetron sputtering

Najafi H., Karimi A., Morstein M., Najafi H., Ecole Polytechnique Fédérale de Lausanne, CH

Due to their good mechanical properties as well as high temperature oxidation resistance, multi element oxynitride thin films have attracted more attention for applications in cutting and forming tools. Nanocomposite coatings represent a new generation [...]