Publications by Pierre Stadelmann

Electronic structure of Mg2Si by combining electron diffraction and first-principles calculations

We have used accurate convergent beam electron diffraction to determine the structure factors of the reflections most sensitive to the valence-electron distribution in Mg2Si. The experimental values agree well with calculations of the structure factors bas ...

2012

Biexciton emission and crystalline quality of ZnO nano-objects

Jean-Philippe Ansermet, Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Pierre Stadelmann, Anas Mouti, Pierre Michel Corfdir, Elisa Papa

The design of cost-effective standards for the quality of nano-objects is currently a key issue toward their massive use for optoelectronic applications. The observation by photoluminescence of narrow excitonic and biexcitonic emission lines in semiconduct ...

Institute of Physics2011

One-dimensional exciton luminescence induced by extended defects in nonpolar GaN/(Al,Ga)N quantum wells

Benoît Marie Joseph Deveaud, Jean-Daniel Ganière, Pierre Stadelmann, Denis Martin, Jacques Levrat, Nicolas Grandjean, Raphaël Butté, Yadira Arroyo Rojas Dasilva, Tiankai Zhu, Pierre Michel Corfdir

In this study, we present the optical properties of nonpolar GaN/(Al,Ga)N single quantum wells (QWs) grown on either a- or m-plane GaN templates for Al contents set below 15%. In order to reduce the density of extended defects, the templates have been proc ...

Institute of Physics2011

Defects in a-GaN grown on r-sapphire by hydride vapor phase epitaxy

Pierre Stadelmann, Denis Martin, Nicolas Grandjean, Tiankai Zhu

Non-polar a-GaN films grown on r-sapphire by hydride vapor phase epitaxy (HVPE) are studied using transmission electron microscopy (TEM). Despite the small lattice mismatch in a-GaN ([1 0 (1) over bar 0] similar to 1.1% and [0 00 1] similar to 16%), high d ...

2011

Boron nitride multiwall nanotubes decorated with BN nanosheets

Pierre Stadelmann

We report a simple chemical-route to BN multiwall nanotubes decorated with nanosheets. These nanostructures have been prepared on a large scale from a simple unique chemical process under an ammonia flow onto the surface of an alumina substrate, using carb ...

2011

Stress-modulated composition in the vicinity of dislocations in nearly lattice matched AlxIn1-x N/GaN heterostructures: A possible explanation of defect insensitivity

Jean-François Carlin, Pierre Stadelmann, Jean-Luc Rouvière, Marco Cantoni, Nicolas Grandjean, Eric Feltin, Anas Mouti

Evidence of composition fluctuations around threading dislocations at scales ranging from atomic distances to tens of nanometers is provided by z-contrast imaging, strain measurement, and energy dispersive x-ray spectroscopy in AlxIn1-x N/GaN heterostructu ...

2011

Cathodoluminescence in a (S)TEM – Exploring Possibilities and Limits

Pierre Stadelmann, Anas Mouti, Cécile Hébert, Duncan Thomas Lindsay Alexander

Cambridge, Cambridge University Press2010

Core-shell Au@(TiO2, SiO2) nanoparticles with tunable morphology

Pierre Stadelmann, Anas Mouti

A novel approach based on the Stober method allows breaking of the symmetry of core-shell systems based on metallic core and metal oxide shell. By adjusting the proportion of the TiO2 precursor with regard to the silica precursor, different morphologies of ...

Royal Society of Chemistry2010

The symmetry of precession electron diffraction patterns

Pierre Stadelmann

The integrated intensity of the diffracted beams present on microdiffraction precession patterns can be used to infer the 'ideal' symmetry, i.e. the symmetry which takes into account both the position and the intensity of the diffracted beams on a diffract ...

Wiley-Blackwell2010

Core-shell gold J-aggregate nanoparticles for highly efficient strong coupling applications

Pierre Stadelmann

We have developed a straightforward synthetic route to prepare core-shell systems based on gold nanoparticles (NPs) surrounded with J-aggregates molecules. This synthesis allows the direct and efficient coating, at room temperature, of pretreated citrate-s ...

AIP American Institute of Physics2010

High-Mobility AlGaN/GaN Two-Dimensional Electron Gas Heterostructure Grown on (111) Single Crystal Diamond Substrate

Marcel Py, Pierre Stadelmann, Denis Martin, Nicolas Grandjean, Marcus Gonschorek, Anas Mouti, Marco Malinverni

High mobility Al0.28Ga0.72N/GaN two-dimensional electron gas (2DEG) is achieved on ( 111) oriented single crystal diamond substrate. The surface morphology of the epilayer is free of cracks thanks to the use of an AlN interlayer for strain relaxation. The ...

2010

Preparation of BN microtubes/nanotubes with a unique chemical process

Pierre Stadelmann

2008

Large vacuum Rabi splitting in a multiple quantum well GaN-based microcavity in the strong-coupling regime

Jean-François Carlin, Pierre Stadelmann, Nicolas Grandjean, Raphaël Butté, Eric Feltin, Gabriel Christmann, Antonino Francesco Castiglia, Anas Mouti

An AlInN/AlGaN microcavity (MC) containing a GaN/Al0.2Ga0.8N multiple quantum well (MQW) structure is investigated through room temperature (RT) photoluminescence and reflectivity experiments. A vacuum Rabi splitting as large as 50 meV at RT is reported fo ...

2008

Electron energy loss and cathodoluminescence spectrometries in transmission electron microscopy: physical and optical properties of materials at nanoscale

Pierre Stadelmann, Cécile Hébert

2007

Synthesis of boron nitride nanotubes by a template-assisted polymer thermolysis process

Pierre Stadelmann

2007

Very long SiC-based coaxial nanocables with tunable chemical composition

Pierre Stadelmann

Wiley-VCH Verlag GmbH2007

The morphology of submicronsized core–shell latex particles: An electron microscopy study

John Christopher Plummer, Pierre Stadelmann, Cédric Gaillard

The core–shell structure of a range of acrylic–acrylic latexes has been investigated by combining different specimen preparation methods with transmission electron microscopy (TEM), dark-field scanning transmission electron microscopy (DSTEM) and low-volta ...

2007

Temperature dependence of the structure and energy of domain walls in a first-order ferroelectric

Pierre Stadelmann

2007

EELS spectroscopy of iron fluorides and FeFx/C nanocomposite electrodes used in Li-ion batteries

Pierre Stadelmann

2007

Synthesis of nanoscopic optical fibers using lipid membranes as templates

Rudolf Hovius, Pierre Stadelmann, Horst Vogel, Dimitrios Stamou, Marinela Gjoni Boillat, Jean-Manuel Segura, Gopakumar Gopalakrishnan, Kurt Schenk, Cédric Gaillard

High-aspect-ratio, monocryst. Cd chloride nanowires doped with fluorescent CdS nanoparticles were synthesized using planar lipid membranes as templates. Cd2+ ions bound to the lipid bilayers (a) are released at low pH to the nanometer-sized, interlamellar ...

Wiley-VCH Verlag GmbH2005