A5073863307- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Semiconductor materials and devices
- Metal and Thin Film Mechanics
- Analytical chemistry methods development
- Plasma Diagnostics and Applications
- GaN-based semiconductor devices and materials
- Chalcogenide Semiconductor Thin Films
- Diamond and Carbon-based Materials Research
- Integrated Circuits and Semiconductor Failure Analysis
- Quantum Dots Synthesis And Properties
- Ga2O3 and related materials
- 2D Materials and Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Copper Interconnects and Reliability
- MXene and MAX Phase Materials
- Semiconductor materials and interfaces
- Perovskite Materials and Applications
- Anodic Oxide Films and Nanostructures
- Laser-induced spectroscopy and plasma
- Copper-based nanomaterials and applications
- Plasma Applications and Diagnostics
- nanoparticles nucleation surface interactions
- Advanced Memory and Neural Computing
- Analytical Chemistry and Sensors
Horiba (France)
2013-2024
Horiba (Japan)
2007-2022
Interface (United Kingdom)
2020
University of Leeds
2015
Institut de Physique
2004-2005
Institut National de Physique Nucléaire et de Physique des Particules
2004-2005
Institut de Biochimie et Biophysique Moléculaire et Cellulaire
2005
Centre National de la Recherche Scientifique
2004-2005
Ionwerks (United States)
2002-2005
Université Paris Cité
2004-2005
The concurrent analysis of the morphological and optical properties demonstrates that TEPL is a unique tool to study 2D materials at nanoscale.
Abstract Secondary ion mass spectrometry (SIMS) for biomolecular analysis is greatly enhanced by the instrumental combination of orthogonal extraction time‐of‐flight with massive gold cluster primary bombardment. Precursor peptide molecular yield enhancements 1000, and signal‐to‐noise improvements up to 20, were measured comparing SIMS spectra obtained using Au + 400 4+ bombardment neat films neuropeptide fragment dynorphin 1–7. Remarkably low damage cross‐sections also from 1–7 gramicidin S...
It is the aim of this "perspective" to survey current activities lively glow discharge community. These cover a wide range, from atmospheric pressure discharges, via actual developments in instrumentation for, and use of, GD-OES GD-MS, pulsed discharges basic principles, i.e., characterization analytical description fundamental processes occurring them. The article also intended explain background EU Specific Targetted Research Project (STREP) "EMPDA" Analytical Glow Discharge Training...
Direct solid analysis of bulk and thin coated glasses by pulsed radiofrequency (rf) glow discharge time-of-flight mass spectrometry (GD-TOFMS) is investigated. Modulated low pressure plasma created pulsed-rf-GD has been coupled to a fast TOFMS in order obtain complete spectra information from the different GD pulse domains (pre-peak, plateau afterglow). In particular, it was observed that analytes show highest atomic ion signals afterglow region some hundred microseconds after maximum Ar...
Abstract One common challenge highlighted in almost every review article on organic resistive memory is the lack of areal switching uniformity. This, fact, a puzzle because molecular mechanism should ideally be isotropic and produce homogeneous current free from electroforming. Such demonstration, however, remains elusive to date. The reports attempting characterize nanoscopic picture films show random spikes, just opposite expectation. Here, this longstanding conundrum resolved by...
The analytical potential of a radiofrequency glow discharge orthogonal time-of-flight mass spectrometer (RFGD-TOFMS) has been evaluated in both pulsed and non-pulsed modes. A certified reference steel was selected for this study. operating conditions the GD plasma (pressure applied power) were optimized terms sensitivity. Additionally, duty cycle pulse width parameters investigated RF mode. In case, high analyte ion signals improved signal to background ratios measured after end pulse,...
A plasma cleaning procedure to improve elemental depth profiling of shallow layered materials by glow discharge spectrometry is proposed. The based on two approaches applied prior profiling, either individually or sequentially. first approach employs a generated at low power, i.e. "soft" plasma, for removal contaminants adsorbed the surface target material. In second approach, sacrificial material sputtered under normal conditions, e.g. those used clean inner anode source. It demonstrated...
Abstract We demonstrate the potential of an innovative technique, pulsed radiofrequency glow discharge time‐of‐flight mass spectrometry, for molecular depth profiling polymer materials. The technique benefits from presence, in afterglow discharge, fragment ions that can be related to structures polymers under study. Thin films different (PMMA, PET, PAMS, PS) were successfully profiled with retention information along profile. Multilayered above also profiled, and it was possible discriminate...
Abstract A Au‐Si liquid metal ion source which produces Au n clusters over a large range of sizes was used to study the dependence both molecular desorption yield and damage cross‐section on size ( = 1 400) kinetic energy E 10 500 keV) bombard bioorganic surfaces. Three pure peptides with masses between 750 1200 Da were without matrix. [M+H] + [M+cation] emission yields enhanced by as much three orders magnitude when bombarding instead monatomic , yet very little induced in samples. 100‐fold...
MoS2 nanoribbons have attracted increased interest due to their properties, which can be tailored by tuning dimensions. Herein, the growth of and triangular crystals formed reaction between films MoOx (2<x<3) grown pulsed laser deposition NaF in a sulfur-rich environment is demonstrated. The reach up 10 µm length, feature single-layer edges, forming monolayer-multilayer junction enabled lateral modulation thickness. edges show pronounced second harmonic generation symmetry breaking, contrast...
The implantation of low velocity massive gold cluster ions allows homogeneous incorporation a metallic matrix into the near-surface region rat brain tissues. Subsequent analysis by laser desorption ionization mass spectrometry yields spectra exhibiting molecular ion peaks in range up to 35 kDa similar those observed matrix-assisted LDI. Matrix-implanted LDI when combined with ion-mobility preseparation promises be useful technique for imaging biotissues microprobe. Keywords: implanted •...
3+ -Yb co-doped films Er -tellurite target glass was also used for comparison.The and sequential processes accomplished rare-earth concentrations of 1.63 × 10 21 atoms.cm - 0.89 respectively, demonstrating the : 4 I13/2 lifetimes 9.1 ms 12.9 ms.The unique process achieved a 30% higher modified layer thickness 35% longer fluorescence lifetime compared to sample.The real-time inter-layer mixing through approach are vital realization highly dense silica with reduced quenching.
We investigate boron silicate glasses (BSG) deposited by plasma-enhanced chemical vapor deposition (PECVD) as a diffusion source on n-type wafers for the simplified fabrication of crystalline Si solar cells codiffusion processes. By varying SiH <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> /B xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> H xmlns:xlink="http://www.w3.org/1999/xlink">6</sub> gas flow ratio and layer thickness PECVD...
The implantation of low-velocity massive gold clusters is shown to be a method choice for homogeneous incorporation metallic matrix into the near-surface region solid biopolymer subsequent laser desorption/ionization (LDI) MS analysis. Matrix implanted (MI)LDI spectra from cluster-implanted pure test peptide or tissue exhibit molecular ion peaks similar those observed by matrix-assisted LDI. Moreover, emission very reproducible any spot on surface these samples. MILDI promises powerful...
Abstract Glow discharge optical emission spectroscopy (GD‐OES) has been shown to be of immense value in elemental depth profiling thin or thick films on conductive non‐conductive substrates. For aluminium, GD‐OES employed examine locations markers and tracers anodic films, thereby assisting understanding transport phenomena. In order investigate the influence surface topography analysis, aluminium oxide various thicknesses, with incorporated electrolyte species, were produced superpure...