A5005440226- Semiconductor materials and devices
- Magnesium Alloys: Properties and Applications
- Corrosion Behavior and Inhibition
- Catalytic Processes in Materials Science
- Semiconductor materials and interfaces
- Surface Modification and Superhydrophobicity
- Catalysis and Oxidation Reactions
- Electron and X-Ray Spectroscopy Techniques
- GaN-based semiconductor devices and materials
- Plasma Applications and Diagnostics
- Advanced Combustion Engine Technologies
- Catalysis and Hydrodesulfurization Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Advancements in Battery Materials
- Anodic Oxide Films and Nanostructures
- Biodiesel Production and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Hydrogen embrittlement and corrosion behaviors in metals
- Copper Interconnects and Reliability
- Aluminum Alloy Microstructure Properties
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Gas Sensing Nanomaterials and Sensors
- Extraction and Separation Processes
- Plasma Diagnostics and Applications
STMicroelectronics (France)
2023-2024
STMicroelectronics (Czechia)
2023
Centre National de la Recherche Scientifique
2003-2010
Laboratoire Catalyse et Spectrochimie
2010
École Nationale Supérieure d'Ingénieurs de Caen
2010
Université de Pau et des Pays de l'Adour
2007
Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux
2007
University of Auckland
2006
Laboratoire d’Electrochimie et de Physico-chimie des Matériaux et des Interfaces
2003-2005
Université Joseph Fourier
2004
The impact of aluminum oxide coatings on materials for commercial lithium ion batteries has been investigated by X-ray photoelectron spectroscopy (XPS). A low binding energy component in the core peak spectra was observed and attributed to formation a solid solution interphase both - -coated . surface chemistry pristine cathodes graphite anodes have after cycling up or cutoff voltage various levels capacity fade. coating enhances retention at voltages. XPS analyses provided evidence...
FTIR spectroscopy coupled with mass spectrometry has been used to study the mechanism of methanol oxidation at low temperatures on nanostructured Au/CeO2 and Au/TiO2 catalysts. Activity selectivity toward CO2 have investigated through simultaneous analysis adsorbed surface species gaseous species, some key steps in pathway, active sites, intermediate are proposed. Among detected kinds methoxy formed support were identified as intermediates, which further transform into formates whose was...
Abstract The behaviour of the 6% aluminium–magnesium alloy (AM60) surface in zirconium or titanium fluoride aqueous acid solutions was studied. X‐ray photoelectron spectroscopy used to investigate modifications chemistry with respect composition treatment solution. film is composed magnesium hydroxide and hydroxyfluoride, oxide, oxyhydroxide oxyfluoride, oxide structural adsorbed water. Optimal parameters leading formation a zirconium‐ titanium‐rich were determined. A mechanism proposed for...
Abstract Atmospheric pressure dielectric barrier discharge deposition of organosilicon thin films on aluminium foils was investigated for different electrical excitations. The plasma reactor fed with nitrogen and hexamethyldisiloxane as film precursor. Scanning electron microscopy observations secondary ion mass spectrometry associated X‐ray photoelectron spectroscopy showed how the modulation excitation can affect morphology chemistry coatings. corrosion behaviour obtained characterised by...
Fluorine-free surfaces with high water contact angle (WCA) and adhesion force to are prepared by the atmospheric pressure dielectric barrier discharge (AP-DBD) of hexamethyldisiloxane on cold rolled aluminum foil. Water droplets, which remained plasma-polymerized (ppHMDSO) surface 155°, do not slide even when is tilted vertically or turned upside down. Scanning electron microscopy, atomic microscopy confocal highlight importance dual-scale roughness ppHMDSO surface. The "sticky" WCA property...
Acidic zirconia materials have been tested as catalysts for the Selective Catalytic Reduction of nitrogen oxides (NOx) by ammonia (NH 3 -SCR). This paper focuses on promotion acidic ceria. The introduction ceria increases NOx conversion, selectivity to N 2 and durability makes attractive Diesel after treatment systems.
Abstract In this work, the interactions of a stearic acid film deposited on silicon by spin coating with post‐discharge an Ar/N 2 or Ar/O atmospheric pressure microwave plasma are studied. Sample surface before and after treatment is analysed means different analysis methods (water contact angle measurements, XPS, ToF‐SIMS FTMS). Both treatments modify but higher etching rate for post‐discharges. The creation double carbon bonds CC observed during treatments, quantity treatments. mechanisms...
Abstract The degree of hydroxylation or hydration aluminium surfaces has been examined by static secondary ion mass spectroscopy (SSIMS). SSIMS spectra a series oxide, oxyhydroxide and hydroxide have obtained using instruments in three configurations. Similarities were observed both negative positive ions spectra. Even though direct comparison the relative intensities cannot be made from one instrument to other, similar ranking various states was observed. Several methods are discussed, as...
Abstract This paper studies the magnesium migration phenomenon during annealing in 8xxx series alloy with bulk content range of 20–240 ppm. X‐ray photoelectron spectroscopy and dynamic secondary ion mass spectrometry are used to determine Mg surface concentration distribution aluminium oxide layer depending on duration. Copyright © 2010 John Wiley & Sons, Ltd.
Original approach to detect and quantify carbon atoms located in different chemical states SiGeC films using X-ray photoelectron spectroscopy.
Lattice-matched SiGeC with ~20% of Ge was grown at 550°C, 10 Torr on a 300 mm Si substrate in an industrial standard Reduced Pressure Chemical Vapor Deposition reactor using commercially available 2 H 6 /GeH 4 /SiH 3 CH precursors. Thicknesses exceeding 250 nm resulted cluster formation [C] Sub ~2.0% and Int ~0.4%, surface density up to 6.13x10 µm -2 . Room temperature photoluminescence measurements showed that the clusters were non-radiative defects Transmission Electron Microscopy, ASTAR...
The performance of an HBT is primarily influenced by 1D dopant profile obtained CVD epitaxy. Typically, three epitaxial layers are required to construct HBT: the collector, intrinsic base, and emitter. Collector layer can be grown either NSEG or selective While process cost effective, it results in autodoping. Switching epitaxy mitigate autodoping but must controlled minimize faceting. base critical device performance, with boron positioning being a key factor. Incorporating substitutional...
In this paper, SiGeC:B growth behaviors at 550 °C, 10 Torr, were studied in a 300 mm industrial Reduced Pressure-Chemical Vapor Deposition reactor using Si 2 H 6 /GeH 4 /SiH 3 CH /B chemistry. Carbon atoms, for both SiGeC and layers, only incorporated into substitutional sites, with concentrations up to ~ 1.4 at%. It appeared that in-situ boron doping level of 1x10 20 at.cm -3 did not modify the carbon incorporation. However, atoms shown compete incorporation as outlined by increased films...