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Cécile Hébert

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Related publications (124)

Tilt-less 3-D electron imaging and reconstruction of complex curvilinear structures

Robin Schäublin, Pascal Fua, Quentin Thomas Jeangros, Guillaume Lucas, Cécile Hébert, Duncan Thomas Lindsay Alexander, Emad Oveisi, Antoine Letouzey

The ability to obtain three-dimensional (3-D) information about morphologies of nanostructures elucidates many interesting properties of materials in both physical and biological sciences. Here we demonstrate a novel method in scanning transmission electro ...

Nature Research2017

Combining in-Situ SEM with High Sensitivity Analytical TEM for Understanding the Degradation of Metallic Interconnects in SOFC

Jan Van Herle, Cécile Hébert, Stéphane François Jean Poitel

2017

On the ADF-STEM dislocation contrast

Cécile Hébert, Emad Oveisi, Maria Chiara Spadaro

2017

Computer Vision Techniques Applied to the Reconstruction of the 3-D Structure of Dislocations

Pascal Fua, Cécile Hébert, Emad Oveisi, Sandro Ivo Sebastiano De Zanet

Cambridge University Press2017

Stereo-vision three-dimensional reconstruction of curvilinear structures imaged with a TEM

Pascal Fua, Marco Cantoni, Guillaume Lucas, Cécile Hébert, Emad Oveisi, Antoine Letouzey, Sandro Ivo Sebastiano De Zanet

Deriving accurate three-dimensional (3-D) structural information of materials at the nanometre level is often crucial for understanding their properties. Tomography in transmission electron microscopy (TEM) is a powerful technique that provides such inform ...

Elsevier2017

A TEM study of Ni interfaces formed during activation of SOFC anodes in H 2 : Influence of grain boundary symmetry and segregation of impurities

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

The electrochemical properties of a solid oxide fuel cell depend on many parameters, including – on the anode side – the connectivity of the Ni network and the segregation of impurities at active points. In this work, advanced scanning transmission electro ...

2016

Spin and valence dependence of iron partitioning in Earth's deep mantle

Marco Cantoni, Cécile Hébert, Philippe Gillet, Farhang Nabiei, James Badro, Hélène Marie Piet, Teresa Katharina Dennenwaldt

We performed laser-heated diamond anvil cell experiments combined with state-of-the-art electron microanalysis (focused ion beam and aberration-corrected transmission electron microscopy) to study the distribution and valence of iron in Earth's lower mantl ...

National Academy of Sciences2016

Strain-driven oxygen deficiency in multiferroic SrMnO3 thin films

Cécile Hébert, Rolf Erni

The structural and electronic properties of a series of SrMnO3 thin films grown on different substrates leading to different biaxial strains are examined by means of aberration-corrected high-angle annular dark-field scanning transmission electron microsco ...

Amer Physical Soc2016

Energy-filtered environmental transmission electron microscopy for the assessment of solid-gas reactions at elevated temperature: NiO/YSZ-H-2 as a case study

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

A novel approach, which is based on the analysis of sequences of images recorded using energy-filtered transmission electron microscopy and can be used to assess the reaction of a solid with a gas at elevated temperature, is illustrated for the reduction o ...

Elsevier Science Bv2016

Increasing Polycrystalline Zinc Oxide Grain Size by Control of Film Preferential Orientation

Christophe Ballif, Aïcha Hessler-Wyser, Sylvain Nicolay, Arthur Brian Aebersold, Cécile Hébert, Duncan Thomas Lindsay Alexander, Lorenzo Fanni, Monica Morales Masis

We investigate the structural evolution of polycrystalline zinc oxide films grown by low pressure metal-organic chemical vapor deposition. The goal is to achieve larger grains-leading to higher charge carrier mobility from lower grain boundary density-by c ...

American Chemical Society2015

Microstructural stability of ODS steels in cyclic loading

Cécile Hébert

The remarkable microstructural stability of high chromium steels prepared by powder metallurgy and strengthened by dispersion of nanometric yttrium oxides in cyclic loading at high temperatures is reported. Contrary to the continuous cyclic softening and p ...

Wiley-Blackwell2015

Direct Evidence of Surface Reduction in Monoclinic BiVO4

Cécile Hébert, Piyush Agrawal, Rolf Erni, Daniele Passerone

Local measurements of the oxidation state of vanadium in monoclinic BiVO4 particles by means of electron energy-loss spectroscopy in scanning transmission electron microscopy reveal a pronounced surface reduction: within a 5-nm-thick shell, the oxidation s ...

Amer Chemical Soc2015

Height-resolved quantification of microstructure and texture in polycrystalline thin films using TEM orientation mapping

Arthur Brian Aebersold, Cécile Hébert, Duncan Thomas Lindsay Alexander

A method is presented for the quantitative investigation of microstructure and texture evolution in polycrystalline thin films based on in-plane automated crystal orientation mapping in transmission electron microscopy, from the substrate up. To demonstrat ...

Elsevier Science Bv2015

Gentle quantitative measurement of helium density in nanobubbles in silicon by spectrum imaging

Guillaume Lucas, Cécile Hébert, Duncan Thomas Lindsay Alexander

We propose an original method for the determination of the physical properties of nanometer sized helium bubbles using spectrum imaging in an energy-filtered transmission electron microscope. Helium bubbles synthesized by high fluence implantation and ther ...

Pergamon-Elsevier Science Ltd2015

Direct visualization of dispersed lipid bicontinuous cubic phases by cryo-electron tomography

Raffaele Mezzenga, Davide Demurtas, Cécile Hébert, Paul Guichard

Bulk and dispersed cubic liquid crystalline phases (cubosomes), present in the body and in living cell membranes, are believed to play an essential role in biological phenomena. Moreover, their biocompatibility is attractive for nutrient or drug delivery s ...

Nature Publishing Group2015

Toward Knowledge-Based Grain-Boundary Engineering of Transparent Alumina Combining Advanced TEM and Atomistic Modeling

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

Transition element dopants (e.g., Y, La) are commonly used as sintering aids in polycrystalline alumina ceramics, which segregate to the grain boundaries and control the grain-boundary mobility. However, due to the extremely thin (

Wiley-Blackwell2015

Measurements of local chemistry and structure in Ni(O)-YSZ composites during reduction using energy-filtered environmental TEM

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

Energy-filtered transmission electron microscopy images are acquired during the reduction of a NiO-YSZ composite in H-2 up to 600 degrees C. Temperature-resolved quantitative information about both chemistry and structure is extracted with nm spatial resol ...

Royal Society of Chemistry2014

Oxidation mechanism of nickel particles studied in an environmental transmission electron microscope

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

The oxidation of nickel particles was studied in situ in an environmental transmission electron microscope in 3.2 mbar of O-2 between ambient temperature and 600 degrees C. Several different transmission electron microscopy imaging techniques, electron dif ...

Pergamon-Elsevier Science Ltd2014

Optimization of the Data Acquisition and Processing using a Prior Knowledge of the Camera Characteristics: an EFTEM Case Study

Guillaume Lucas, Cécile Hébert

Cambridge, Cambridge University Press2014

Enhanced Quantification for 3D Energy Dispersive Spectrometry: Going Beyond the Limitation of Large Volume of X-Ray Emission

Marco Cantoni, Pierre Burdet, Cécile Hébert

This paper presents a method developed to quantify three-dimensional energy dispersive spectrometry (3D EDS) data with voxel size smaller than the volume from which X-rays are emitted. The influence of the neighboring voxels is corrected by applying recurs ...

Cambridge University Press2014

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