Publications de Alex Dommann | EPFL Graph Search

Real- and Q-space travelling: multi-dimensional distribution maps of crystal-lattice strain (epsilon(044)) and tilt of suspended monolithic silicon nanowire structures

Yusuf Leblebici, Antonia Neels, Alex Dommann, Zuhal Tasdemir, Simone Dolabella

Silicon nanowire-based sensors find many applications in micro- and nano-electromechanical systems, thanks to their unique characteristics of flexibility and strength that emerge at the nanoscale. This work is the first study of this class of micro- and na ...

INT UNION CRYSTALLOGRAPHY2020

New approach for time-resolved and dynamic investigations on nanoparticles agglomeration

Francesco Stellacci, Antonia Neels, Urszula Beata Cendrowska, Alex Dommann, Claudio Toncelli

Nanoparticle (NP) colloidal stability plays a crucial role in biomedical application not only for human and environmental safety but also for NP efficiency and functionality. NP agglomeration is considered as a possible process in monodispersed NP colloida ...

TSINGHUA UNIV PRESS2020

Surface tension and viscosity of liquid Pd43Cu27Ni10P20 measured in a levitation device under microgravity

Roland Logé, Antonia Neels, Alex Dommann

Here we present measurements of surface tension and viscosity of the bulk glass-forming alloy Pd43Cu27Ni10P20 performed during containerless processing under reduced gravity. We applied the oscillating drop method in an electromagnetic levitation facility ...

Springer2019

High diffusion barrier and piezoelectric nanocomposites based on polyvinylidene fluoride-trifluoroethylene copolymer and hydrophobized clay

Yves Leterrier, Dragan Damjanovic, Sara Dalle Vacche, Antonia Neels, Olha Sereda, Alex Dommann

Nanocomposites based on polyvinylidene fluoride– trifluoroethylene copolymer and up to 4 vol % of hydrophobized clay nanoparticles are investigated. The structure, piezoelectric properties, and oxygen permeability of solvent cast films are analyzed before ...

Wiley-Blackwell2017

Where is the limit? Yield strength improvement in silicon micro-structures by surface treatments

Antonia Neels, Alex Dommann, Tobias Bandi

Imperfections, like surface roughness and defects, introduced by common manufacturing processes are recognized to favor failure of microfabricated components and systems. Up to now only a reduced part of the ideal strength prediction by zero Kelvin quantum ...

Wiley-VCH Verlag2016

High Piezoelectric Longitudinal Coefficients in Sol-gel PZT Thin Film Multilayers

Paul Muralt, Andrea Mazzalai, Antonia Neels, Silviu Cosmin Sandu, Nachiappan Chidambaram, Alex Dommann, Davide Balma

A five-layer stack of lead zirconate titanate (PZT) thin films with Pt electrodes was fabricated for potential applications in nanoactuator systems. The 1 mu m thick PZT films were deposited by a sol-gel technique, the platinum electrodes by sputtering. Th ...

Wiley-Blackwell2014

Process influences on the structure, piezoelectric, and gas-barrier properties of PVDF-TrFE copolymer

Dragan Damjanovic, Yves Leterrier, Antonia Neels, Olha Sereda, Alex Dommann

The influence of annealing between the Curie transition and the melting point of solvent cast polyvinylidene fluoride trifluoroethylene copolymer films on the crystalline structure, mechanical and electrical properties, and oxygen permeability is investiga ...

2014

A thermally self-sustained micro-power plant with integrated micro-solid oxide fuel cells, micro-reformer and functional micro-fluidic carrier

Paul Muralt, Thomas Maeder, Claude Muller, Bo Jiang, Alex Dommann, Dimos Poulikakos

Low temperature micro-solid oxide fuel cell (micro-SOFC) systems are an attractive alternative power source for small-size portable electronic devices due to their high energy efficiency and density. Here, we report a thermally self-sustainable reformer – ...

Elsevier2014

Proton-Radiation Tolerance of Silicon and SU-8 as Structural Materials for High-Reliability MEMS

Herbert Shea, Antonia Neels, Tobias Bandi, Alex Dommann

The susceptibility of single-crystal silicon and SU-8 resonators to proton-radiation induced degradation was investigated. Both materials are in widespread use for microsystems structures, thus the stability of the mechanical properties must be ensured ove ...

Institute of Electrical and Electronics Engineers2013