Publications de Guillaume Lucas

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

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

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

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

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

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

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

Vibrational contributions to the stability of point defects in bcc iron: A first-principles study

Robin Schäublin, Guillaume Lucas

The purpose of this study is to investigate the modes of vibration of the self-interstitial atoms and the vacancy in bcc iron and to estimate how the vibrational properties can affect the stability of these defects. The phonon density of states of the vaca ...

Elsevier2009

State of a pressurized helium bubble in iron

Robin Schäublin, Seyed Masood Hafez Haghighat, Guillaume Lucas

We study the state of a nanometric helium bubble in bcc-iron as a function of temperature and He content using atomistic calculations. It appears that up to moderate temperatures the Fe lattice can conﬁne He to solid state, in good agreement with known sol ...

IOP Publishing - EPL Association2009

Stability of helium bubbles in alpha-iron: A molecular dynamics study

Robin Schäublin, Guillaume Lucas

Molecular dynamics simulations were performed to estimate the dissociation energies of helium interstitials, vacancies and self-interstitial atoms from small helium-vacancy clusters. Several sets of empirical potentials have been tested and compared with a ...

Elsevier2009

Atomistic simulation of He bubble in Fe as obstacle to dislocation

Robin Schäublin, Seyed Masood Hafez Haghighat, Guillaume Lucas

2009

Atomistic simulation of He bubble in Fe as obstacle to dislocation

Seyed Masood Hafez Haghighat, Guillaume Lucas

2008

Helium implanted gallium nitride evidence of gas-filled rod-shaped cavity formation along the c-axis

Guillaume Lucas

structural defects induced by He implantation in GaN epilayer at high fluence (1 X 10(17) He/cm(2)) and elevated temperature (750 degrees C) have been studied by conventional and high resolution transmission electron microscopy. In addition to the planar i ...

American Institute of Physics2008

Helium effects on displacement cascades in alpha-iron

Robin Schäublin, Guillaume Lucas

2008

The role of small specimen test technology in fusion materials development

Philippe Spätig, Guillaume Lucas

Small specimen test technology (SSTT) has long been an integral part of fusion materials development. Past work has led to an array of techniques that not only have provided a means of efficiently using available irradiation volumes but have also led to im ...

2007