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Cécile Hébert

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Publications associées (124)

Segregation of anion (Cl−) impurities at transparent polycrystalline α-alumina interfaces

Paul Bowen, Marco Cantoni, Cécile Hébert, Abhishek Tewari, Farhang Nabiei

Small amounts of anion impurities (e.g. Cl), which are incorporated during the synthesis of ceramic powders, can affect the properties and microstructure of the final sintered ceramic. The effect of anion impurities is a little studied and poorly understoo ...

Elsevier Sci Ltd2014

Identifying champion nanostructures for solar water-splitting

Michael Graetzel, Maurin Cornuz, Cécile Hébert, Scott Charles Warren, Francesco Stellacci, Kislon Voitchovsky

Charge transport in nanoparticle-based materials underlies many emerging energy-conversion technologies, yet assessing the impact of nanometre-scale structure on charge transport across micrometre-scale distances remains a challenge. Here we develop an app ...

Nature Publishing Group2013

Nanoprecipitates in single-crystal molybdenum-alloy nanopillars detected by TEM and atom probe tomography

Helena Van Swygenhoven, Cécile Hébert, Barbora Bártová, Emad Oveisi, Cécile Renée Maria Marichal

Transmission electron microscopy (TEM) supported by various chemical analyses techniques as well as atom probe tomography is applied to characterize newly identified nanosized precipitates in Mo-alloy nanopillars that were prepared by directional solidific ...

Elsevier2013

Quantitative imaging of flux vortices in the type-II superconductor MgB2 using cryo-Lorentz transmission electron microscopy

Marco Cantoni, Mathieu Julien Gino Cottet, Cécile Hébert, Duncan Thomas Lindsay Alexander, Fabrizio Carbone, Janusz Andrzej Karpinski

Imaging of flux vortices in high quality MgB2 single crystals has been successfully performed in a commercial field-emission gun-based transmission electron microscope. In cryo-Lorentz microscopy, the sample quality and the vortex lattice can be monitored ...

Amer Physical Soc2013

Time-Resolved X-Ray Microtomography Observation of Intermetallic Formation Between Solid Fe and Liquid Al

Aïcha Hessler-Wyser, Michel Rappaz, Guillaume Pasche, Cécile Hébert

Time-resolved in situ X-ray tomography combined with scanning electron microscopy was performed on an Al-Fe diffusion system at 973 K (700 A degrees C) to study the formation of the main intermetallic compounds occurring at the interface. After nucleation ...

Springer US2013

Reduction of nickel oxide particles by hydrogen studied in an environmental TEM

Aïcha Hessler-Wyser, Jan Van Herle, Quentin Thomas Jeangros, Cécile Hébert

In situ reduction of nickel oxide (NiO) particles is performed under 1.3 mbar of hydrogen gas (H-2) in an environmental transmission electron microscope (ETEM). Images, diffraction patterns and electron energy-loss spectra (EELS) are acquired to monitor th ...

Springer US2013

Advanced materials characterization and modeling using synchrotron, neutron, TEM, and novel micro-mechanical techniques-A European effort to accelerate fusion materials development

Cécile Hébert

For the realization of fusion as an energy source, the development of suitable materials is one of the most critical issues. The required material properties are in many aspects unique compared to the existing solutions, particularly the need for necessary ...

Elsevier Science Bv2013

Dynamic structure factors of Cu, Ag, and Au: Comparative study from first principles

Simon Schneider, Audrius Alkauskas, Cécile Hébert

We present a comparative theoretical and experimental study of dynamic structure factors (momentum-dependent loss functions) of the noble metals Cu, Ag, and Au in the energy range of 0-60 eV. The emphasis is on theoretical results that are compared with ne ...

Amer Physical Soc2013

Multivariate statistical analysis as a tool for the segmentation of 3D spectral data

Marco Cantoni, Pierre Burdet, Guillaume Lucas, Cécile Hébert

Acquisition of three-dimensional (3D) spectral data is nowadays common using many different microanalytical techniques. In order to proceed to the 3D reconstruction, data processing is necessary not only to deal with noisy acquisitions but also to segment ...

Pergamon-Elsevier Science Ltd2013

Imaging of high-Q cavity optical modes by electron energy-loss microscopy

Romuald Houdré, Marco Cantoni, Nicolas Le Thomas, Cécile Hébert, Duncan Thomas Lindsay Alexander

We show a technique that images the intensity distribution and local state of polarization of the optical field of high-quality factor optical modes confined in dielectric planar photonic crystal nanocavities. Based on energy-loss spectroscopy of swift ele ...

Amer Physical Soc2013

Nickel oxide reduction studied by environmental TEM and in situ XRD

Aïcha Hessler-Wyser, Jan Van Herle, Quentin Thomas Jeangros, Cécile Hébert

2012

3D EDX microanalysis by FIB-SEM: Elemental quantification enhancement

Marco Cantoni, Pierre Burdet, Cécile Hébert

Cambridge, Cambridge University Press2012

Multivariate Statistical Analysis tool for the interpretation and the quantification of hyperspectral data: application to 3D EDX/FIB images

Marco Cantoni, Pierre Burdet, Guillaume Lucas, Cécile Hébert

Cambridge, Cambridge University Press2012

A perspective on novel sources of ultrashort electron and X-ray pulses

Cécile Hébert, Fabrizio Carbone

Recently, much attention has been devoted to the development of new pulsed sources of radiation for investigating matter with atomic scale temporal and spatial resolution. While much has been achieved thanks to modern ultrafast laser technology, the ultima ...

2012

Statistical analysis of oxides particles in ODS ferritic steel using advanced electron microscopy

Nadine Baluc, Guillaume Lucas, Cécile Hébert

In this work a combination of advanced transmission electron microscopy and spectroscopy techniques enabled a statistically significant analysis of various types of few nanometer size oxides particles in Fe-14Cr-2W-O.3Ti-0.3Y(2)O(3) ferritic steel. These m ...

Elsevier2012

Slip in directionally solidified Mo-alloy micropillars - Part I: Nominally dislocation-free pillars

Helena Van Swygenhoven, Camelia Borca, Cécile Hébert, Barbora Bártová, Emad Oveisi, Cécile Renée Maria Marichal, Steven Van Petegem

In situ Laue analysis during microcompression reveals plasticity in [0 0 1]-oriented, directionally solidified Mo alloy pillars to start with slip on the {1 1 2} < 1 1 1 > system having the highest Schmid factor followed by slip on the (1 1 0) plane contai ...

Elsevier2012

3D EDX Microanalysis by FIB-SEM: Enhancement of Elemental Quantification

Marco Cantoni, Pierre Burdet, Cécile Hébert

Cambridge, Cambridge University Press2011

Focused Ion Beam Nano-Tomography Using Different Detectors

Marco Cantoni, Graham Knott, Pierre Burdet, Cécile Hébert

Cambridge, Cambridge University Press2011

Electronic Interactions between "Pea" and "Pod": The Case of Oligothiophenes Encapsulated in Carbon Nanotubes

Cécile Hébert, Barbora Bártová

One of the most challenging strategies to achieve tunable nanophotonic devices is to build robust nanohybrids with variable emission in the visible spectral range, while keeping the merits of pristine single-walled carbon nanotubes (SWNTs). This goal is re ...

2011

Capturing EELS in the reciprocal space

Audrius Alkauskas, Cécile Hébert

In this work two aspects of momentum-dependent electron energy loss spectrometry are studied, both in the core-loss and in the low-loss region. In the case of core losses, we focus on the demonstration and the interpretation of an unexpected non-Lorentzian ...

2011

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