Concept

Spectroscopie de perte d'énergie des électrons

Publications associées (141)

Standard-free composition measurements of AlxIn1-xN by low-loss electron energy loss spectroscopy

We demonstrate a standard-free method to retrieve compositional information in AlxIn1-xN thin films by measuring the bulk plasmon energy (E-p), employing electron energy loss spectroscopy (EELS) in a scanning transmission electron microscope (STEM). Two se ...

2011

Magnonic minibands in antidot lattices with large spin-wave propagation velocities

Dirk Grundler

Antidot lattices fabricated from permalloy thin films have been investigated by all-electrical spin-wave spectroscopy and Brillouin light scattering. Periodic arrays of 120-nm-diameter nanoholes have been prepared using focused ion beam etching. The period ...

2011

Glass-Forming Exogenous Silicon Contamination in Solid Oxide Fuel Cell Cathodes

Jan Van Herle, Zacharie Wuillemin, Josef Andreas Schuler

Spatially resolved analyses, by energy-dispersive X-ray spectroscopy (EDS) scanning electron microscopy (SEM), allowed the quantification of exogenous Si contamination in a solid oxide fuel cell (SOFC) cathode after operation. The Si quantification, taking ...

Electrochemical Society2011

From Single Particle to Superfluid Excitations in a Dissipative Polariton Gas

Benoît Marie Joseph Deveaud, Marcia Portella Oberli, Verena Kohnle

Using an angle-resolved heterodyne four-wave-mixing technique, we probe the low momentum excitation spectrum of a coherent polariton gas. The experimental results are well captured by the Bogoliubov transformation which describes the transition from single ...

American Physical Society2011

Mixed phase silicon oxide layers for thin-film silicon solar cells

Christophe Ballif, Matthieu Despeisse, Peter Cuony, Nils Linus Löfgren, Michael Marending

Lower absorption, lower refractive index and tunable resistance are three advantages of doped silicon oxide containing nanocrystalline silicon grains (nc-SiOx) compared to doped microcrystalline silicon, for the use as p- and n-type layers in thin-film sil ...

2011

The interplay between structure and orbitals in the chemical bonding of graphite

Fabrizio Carbone

Recently, the dynamics of atomic distances and orbital charge in graphite has been investigated by ultra-fast electron diffraction, electron energy loss spectroscopy and transient optical absorption. A subtle interplay between structural motions and electr ...

Elsevier2010

Growth study of indium-catalyzed silicon nanowires by plasma enhanced chemical vapor deposition

Anna Fontcuberta i Morral, Sonia Conesa Boj, Libo Yu, Père Roca i Cabarrocas

Indium was used as a catalyst for the synthesis of silicon nanowires in a plasma enhanced chemical vapor deposition reactor. In order to foster the catalytic activity of indium, the indium droplets had to be exposed to a hydrogen plasma prior to nanowire g ...

2010

Preparation of homogeneous titania coatings on the surface of MWNTs

László Forró, Duncan Thomas Lindsay Alexander, Jin Won Seo, Klara Hernadi

The aim of this work was to develop a controllable route to produce a stable and inorganic layer on the surface of multi-wall carbon nanotubes. Precursor compounds such as TiBr4, TiCl4, Ti(OiPr)(4), and Ti(OEt)(4) were used to cover the surface of carbon n ...

2010

Study of Diluted Magnetic Semiconductors

Zlatko Mickovic

Diluted magnetic semiconductors (DMS), semiconductors in which a fraction of non-magnetic sites have been replaced with their magnetic counterparts, have been in the limelight of the scientific community since the turn of the 21st century. The interest in ...

EPFL2010

Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis

Barbora Bártová

We explored a synthesis route based on the polymer complex solution method for the production of the rare-earth doped Lu2O3 crystalline nanopowders. In this type of synthesis polyethylene glycol is used both as fuel for the combustion reaction, and as nucl ...

2010

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