CH – Page 6 – TechConnect Briefs

Safe nanotextiles from a life cycle perspective

Som C., Halbeisen M., Koehler A., Heuberger M., Empa Materials Science and Technology, CH

The industry aims at taking advantage of the opportunities of new nanomaterials while producing safe products. A dose-effect relationship of the engineered nanoparticles is not clearly established yet. From this viewpoint, the product is only [...]

Novel Nanostructures for Solid State Alcohol Breath Analyzers

Tricoli A., Righettoni M., Pratsinis S.E., Swiss Federal Institute of Technology, CH

Solid state alcohol breath analyzers are commonly used by the law enforcement authorities, due to high sensitivity toward ethanol, their portability and fair response and recovery times. Common materials for the synthesis of the sensitive [...]

Hermetically-Coated Superparamagnetic Fe2O3 Particles with SiO2 Nanofilms

Teleki A., Suter M., Kidambi P.R., Ergeneman O., Krumeich F., Nelson B.J., Pratsinis S.E., ETH Zürich, CH

Magnetic nanoparticles are frequently coated with SiO2 to improve their functionality and bio-compatibility in a range of biomedical and polymer nanocomposite applications. In this paper, a scalable flame aerosol technology is used to produce highly [...]

Two-nozzle flame synthesis of Pt/Ba/Al2O3 for NOx storage

Büchel R., Strobel R., Pratsinis S.E., Baiker A., ETH Zürich, CH

A novel two-nozzle flame spray pyrolysis (FSP) process is presented for one-step preparation of Pt/Ba/Al2O3 particles for NOx storage-reduction (NSR) catalysts. These storage catalysts are of particular interest for mobile engines operating under lean conditions [...]

Towards Nanoscaled Systems: New Dispersing Technologies

Fischer L., Scheid S., Thomas C., Serendip AG, CH

The presentation will give an overview of state-of-the-art technologies and today’s possibilities as well as technical and regulatory limitations. The focus will be on the potential of a new generation of homogenizers, which allowfor the [...]

Micropatterning Layers by Flame Aerosol Deposition – Annealing

Tricoli A., Graf M., Mayer F., Kühne S., Hierlemann A., Pratsinis S.E., PTL, CH

The development of scalable methods, which effectively bind nanoparticles to surfaces and provide precise patterns, is a key step towards the commercial exploitation of the distinctive properties of nanoparticles. In this context, the direct deposition [...]

Modeling the Temperature Field in Reforming Anodes of a Button-Shaped SOFC

Zinovik I., Poulikakos D., ETH Swiss Federal Institute of Technology, CH

A new model for the determination of the temperature field in porous reforming anodes of SOFCs is presented. The model is implemented in a commercial CFD software package. Heat transfer, fluid flow and electrochemical reactions [...]

Compact Modeling of Noise in non-uniform channel MOSFET

Roy A.S., Enz C.C., Lim T.C., Danneville F., CSEM & EPFL, CH

Compact MOSFET noise models are mostly based on the Klaassen-Prins (KP) method. However, the noise properties of lateral nonuniform MOSFETs are considerably different from the prediction obtained with the conventional KP based methods which, at [...]

The Immersed Surfaces Technology for Reliable and Fast Setup of Microfluidics Simulation Problems

Icardi M., Caviezel D., Lakehal D., ASCOMP GmbH, CH

ASCOMP has developed a new fully automatized version for microfluidics applications in bio-devices, using the IST (Immersed surfaces Technique) technique to map complex components/geometries into a simple rectangular Cartesian grid. Near wall regions are treated [...]

Computational Microfluidics for Miniaturised Bio-Diagnostics Devices using the code “TransAT”

Narayanan C., Lakehal D., ASCOMP GmbH, CH

We will report on our recent advances made in predicting this class of flows with our CMFD code TransAT (www.ascomp.ch), using the Level Set approach as an “Interface Tracking Method”. Our code incorporate phase-change capabilities, [...]