CH – Page 10 – TechConnect Briefs

Parallel two channel near and far field fluorescence microscopy

Verdes D., Rabe M., Seeger S., University of Zurich, CH

We report a new two channel fluorescence microscopy technique for surface-generated fluorescence. The realized fluorescence microscope allows high resolution imaging of aqueous samples. The core element of the instrument is a parabolic mirror objective that [...]

Specific and Non-specific adsorption of Proteins on Solid Interfaces

Rabe M., Zimmermann J., Verdes D., Seeger S., University of Zurich, CH

We present a comprehensive mechanistic study of the non-specific adsorption of β-Lactoglobulin on a solid interface by comparing the adsorption kinetics of this protein to theoretical predictions of reported models. Important experimental observations were increasing [...]

Nanomechanical Cantilever Bio-Sensors for Time-Resolved Detection of DNA and Surface Layer Formation

Bammerlin M., Köser J., Shahgaldian P., Pieles U., Battiston F.M., Hubler U., Concentris GmbH, CH

Nanomechanical cantilever are small and extremely sensitive force and mass detectors. By coating (functionalizing) their surface with specific receptor molecules, cantilevers can be converted into highly sensitive and selective chemical sensors or label-free biosensors. The [...]

Structural and rheological investigation of Fd3m inverse micellar cubic phases

Pouzot M., Mezzenga R., Leser M., Sagalowicz L., Nestlé Research Center, CH

Liquid crystalline phases (bicontinuous cubic, reversed hexagonal, lamellar) can be made easily from food emulsifiers such as monoglycerides. Recently we explored in detail the formation of an inverse discrete micellar Fd3m cubic phase, which usually [...]

Education in Nanotechnology through Microscopy Made Easy

Gullo M., Nanosurf AG, CH

An essential goal of education in nanotechnology is an understanding of scale and metrology, of instrumentation and fundamental physics. Easy to use and affordable instrumentation is indispensable in reaching this goal. Nanosurf offers both STM [...]

Atomistic-Continuum Simulations of Carbon Nanotubes in LIquids

Koumoutsakos P., Kotsalis E., Walther J.H., Dupuis A., ETH Zürich, CH

We consider atomistic continuum simulations of carbon nanotube configurations embedded in flows of dense liquids. We consider Schwartz domain decompositions algorithms implying that non-periodic boundary conditions are imposed on the molecular system. In these algorithms, [...]

Micro Patterning Sensor Layers by Flame Deposition and Annealing

Tricoli A., Graf M., Mayer F., Kühne S., Hierlemann A., Pratsinis S.E., Swiss Federal Institute of Technology (ETH Zürich ), CH

A wafer-level, CMOS-compatible, dry process for in-situ synthesis, deposition and annealing of nanostructured, porous metal-oxide layers for gas sensors is presented. First, lace-like, nanostructured layers of pure or Pt-doped SnO2 featuring high porosity (98%) are [...]

On the Compact Modelling of Induced Gate Noise in the MOS Transistor

Roy A.S., Enz C.C., Swiss Federal Institute of Technology, Lausanne (EPFL), CH

This work presents a analytical model to calculate gate related noise parameters for any arbitrary velocity field relationship and discusses some finer point of diffusivity modeling and impact of those effect on gate related noise [...]

A Charge-Based Compact Model of Double Gate MOSFET

Roy A.S., Enz C.C., Sallese J.M., CSEM, CH

To date, a simple physical compact model is still lacking even for the ‘classical’ asymmetric DG MOST because of it’s relatively complex electrostatics. Ref [1] has presented an exact solution for symmetric DG MOST but [...]

Sensing of Organic Vapors by Flame-Made TiO2 Nanoparticles

Teleki A., Pratsinis S.E., Kalyanasundaram K., Gouma P.I., ETH Zürich, CH

Nanostructured anatase TiO2 was produced by flame spray pyrolysis (FSP) and tested for sensing of volatile organic compounds and CO at 500 °C. The as-prepared powders were characterized by transmission/scanning electron microscopy, x-ray diffraction and [...]