A5000648136- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Catalytic Processes in Materials Science
- Magnetism in coordination complexes
- Electrocatalysts for Energy Conversion
- Advanced X-ray Imaging Techniques
- Iron oxide chemistry and applications
- Radiation Shielding Materials Analysis
- Advanced Condensed Matter Physics
- Advancements in Battery Materials
- Magnetic properties of thin films
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Organometallic Complex Synthesis and Catalysis
- Spectroscopy and Quantum Chemical Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Semiconductor materials and devices
- Diamond and Carbon-based Materials Research
- Carbon and Quantum Dots Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Radioactive element chemistry and processing
- Catalysts for Methane Reforming
- Semiconductor Quantum Structures and Devices
- High-pressure geophysics and materials
- Advanced NMR Techniques and Applications
Canadian Light Source (Canada)
2014-2025
University of Saskatchewan
2021-2024
University of Guelph
2023
National Institute for Space Research
2008-2009
Brazilian Synchrotron Light Laboratory
2009
Instituto Venezolano de Investigaciones Científicas
1998
Centre National de la Recherche Scientifique
1995
Laboratoire de Chimie de Coordination
1995
This study examines the effect of hydrogen ingress on internal stress and strain steels, using lab-source synchrotron X-ray diffraction (XRD), exploring both electrochemical gaseous ingress. The results show that compressive strains were generated after charging, residual stresses examined surface changed from being primarily tensile to stresses. confirmed by a change in direction biaxial principal components, shift high-energy XRD peaks higher 2θ values for hydrogen-charged steels....
A new diffraction beamline for materials science has been built at the Canadian Light Source synchrotron. The X-ray source is an in-vacuum wiggler with a 2.5 T peak magnetic field 5.2 mm gap. optical configuration includes toroidal mirror, single side-bounce Bragg monochromator, and cylindrical producing sub-150 µm vertical × 500 horizontal focused beam photon energy range of 7–22 keV flux 10 12 photons per second sample position. Three endstations are currently open to general users,...
$\ensuremath{\alpha}$-RuCl${}_{3}$ is a candidate for realizing the Kitaev quantum spin liquid state. Despite extensive research efforts, its crystal structure at temperatures relevant to studying physics has been controversial. Here, authors examine single with minimal twinning and stacking faults, allowing them unambiguously determine symmetry change across structural phase transition. They find that three-fold rotational of honeycomb plane restored in low-temperature group...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Reactivity of Hydridotris(pyrazolyl) Borate Dihydrogen Ruthenium ComplexesBeatriz Moreno, Sylviane Sabo-Etienne, Bruno Chaudret, Ana Rodriguez, Felix Jalon, Swiatoslaw TrofimenkoCite this: J. Am. Chem. Soc. 1995, 117, 28, 7441–7451Publication Date (Print):July 1, 1995Publication History Published online1 May 2002Published inissue 1 July...
The design, performance, and capabilities of the High Energy beamline at Brockhouse Sector Canadian Light Source are described. uses a single bent silicon wafer as side-bounce Laue monochromator, using (111), (422), or (533) hkl reflections to access energies ranging from 25 90 keV. cryogenically cooled crystal serves only optical element in providing simple, convenient, reliable configuration. bending provides vertical focus small 20 µm. flux ranges 1 × 10 13 photons s −1 , depending on...
The Brockhouse sector of the Canadian Light Source is a suite three hard X-ray beamlines dedicated to diffraction and scattering for materials science. opened general users during 2020-2021. Multiple experimental stations enable several techniques, including: synchrotron high resolution powder (XRD), energy XRD, thin film characterization, total pair distribution function (PDF) experiments, small angle (SAXS), in-situ experiments with multiple environments. chemistry community eagerly seized...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Reactivity of a Stable Hydrido Bis(dihydrogen) Derivative in Nitrogen Donor Environment LRuH(H2)2 (L = HB(3,5-Me2-pz), HB(3-iPr,4-Br-pz))Beatriz Moreno, Sylviane Sabo-Etienne, Bruno Chaudret, Ana Rodriguez-Fernandez, Felix Jalon, Swiatoslaw TrofimenkoCite this: J. Am. Chem. Soc. 1994, 116, 6, 2635–2636Publication Date (Print):March 1, 1994Publication History Published online1 May 2002Published inissue 1 March...
Herein, we reveal a novel and facile pathway for the synthesis of reduced graphene oxide (rGO) from annealed carbon dots (CDs). The CDs (~ 2.5 nm) were synthesized L-ascorbic acid via microwave at 180°C, after which formation rGO nanosheets (≥ 40% yield) was achieved through 10 min annealing under N2 250-700°C. TEM images showed that are initially transformed into an accreted sphere-like turbostratic (d = 0.3390 250°C, finally to layered 'graphene-like' nanomaterial (length ≈ 0.2-2.6 µm)...
A NixCo1-xO/HCS catalyst with superior water-splitting is presented. High reaction kinetics and enhanced durability were observed. The structure-function relationship was investigated XPS, which demonstrated the presence of dominant Ni2+ Co2+ species a functionalized HCS support where nucleation small metal oxide nanoparticles occurred. PDF showed broadened Nickel/Cobalt-oxide bonds expansion metal-metal pair distances. alteration Metal-Oxide Metal-Metal-Oxide favored better HER OER...
The durability and long-term applicability of catalysts are critical parameters for the commercialization adoption fuel cells. Even though a few studies have been conducted on hollow carbon spheres (HCSs) as supports Pt in oxygen reduction reactions (ORR) catalysis, in-depth not thus far. In this study, Pt/HCSs Pt/nitrogen-doped HCSs (Pt/NHCSs) were prepared using reflux deposition technique. Small particles formed with outside shell inside pores shell. new demonstrated high activity (>380...
Resistance capacitance time delay in Cu interconnects is becoming a significant factor requiring further performance improvements future nanoelectronic devices. Choice of alternate interconnect materials, for example, refractory metals, and subsequent integration with underlying barrier liner layers are extremely challenging the sub-10 nm nodes. The development conformal deposition processes interconnects, liner, materials crucial order implementation possible replacement narrow line widths....
X-ray total scattering measurements are implemented using a digital flat-panel area detector in an inclined geometry and compared with the traditional geometry. The is defined here by incident beam impinging on normal to center-most pixel of detector. at pitch angle α, set 15° this case, bisected vertical plane. positioned such that strikes pixels along bottom edge 90° scattered X-rays impinge top edge. geometric attributes translate into multiple benefits, as extension measurable range 90°,...
Interfacial processes involving metal (oxyhydr)oxide phases often control the mobility and bioavailability of nutrient contaminant elements in soils, sediments, water. Consequently, these influence ecosystem health functioning have shaped biological environmental co-evolution Earth over geologic time. Here we employ reactive molecular dynamics simulations, supported by synchrotron X-ray spectroscopy, to derive accurate surface complexation model constants for ferrihydrite-water systems...
In our recent study, we demonstrated using 7Li solid-state Nuclear Magnetic Resonance (ssNMR) and single-crystal X-ray diffraction that the cathode LiFeV2O7 possesses a defect associated with positioning of vanadium atoms. We proposed this could be source extra signals detected in spectra. context, now apply density functional theory (DFT) calculations to assign experimental observed NMR spectra pristine sample. The calculation results are strong agreement observations. DFT useful tool...
The application of N-doped carbon nanosheets, with and without embedded dots, as active materials for the room temperature chemoresistive detection methanol and/or ethanol is presented. new carbons were made by converting 0D dots (NCDs) to 2D nitrogen-doped nanosheets heat treatment (200-700 °C). exhibited a lateral size ∼3 μm thickness ∼12 nm at highest annealing temperature. Both Raman TEM analyses showed morphological transitions sheets, whilst XPS analysis revealed transformation...
The condition for incorporating simple gases with H2O to form clathrate hydrates in protosolar nebula is a subject of topical interest. Methane and carbon dioxide have been speculated exist outer solar system bodies, but they eluded direct detection so far. We constructed low-temperature high-vacuum prepare study by situ synchrotron X-ray diffraction experiments. Upon heating, we found can be obtained from the codeposition methane or water outside equilibrium thermodynamic stability region...
Abstract A novel source for plasma immersion ion implantation and deposition (PIII&D) was developed in order to perform surface treatment of materials with ions from vaporization solid targets. Usually this is obtained by means beamline implanters, which three dimensional requires target manipulation, or vacuum arc discharges, the presence macroparticles main problem be overcame. Samples silicon wafers immersed a lithium produced were submitted low negative high frequency pulses (3‐4...
This study introduces the reciprocal space polar visualization (RSPV) method, a novel approach for visualizing x-ray diffraction-based data. RSPV allows precise separation of tilt and strain, facilitating their individual analysis. InSb was grown by molecular beam epitaxy on two (001) GaAs substrates—one with no misorientation (sample A) one 2° surface from planes B). There is substantial lattice mismatch substrate, this results in generation defects within layer during growth. To...
Interfacial processes involving metal (oxyhydr)oxide phases are important for the mobility and bioavailability of nutrient contaminant elements in soils, sediments, water. Consequently, these influence ecosystem health functioning, have shaped biological environmental co-evolution Earth over geologic time. Here we employ reactive molecular dynamics simulations, supported by synchrotron X-ray spectroscopy to study molecular-scale interfacial that surface complexation ferrihydrite-water...
This contribution reports the incorporation of an organic pillar (L), 4-ethyl isonicotinate, between adjacent layers series 2D coordination polymers, Fe[M(CN)4], with M = Ni, Pd, and Pt. The resulting metal–organic frameworks (MOFs), Fe(L)2[M(CN)4], show thermally induced spin crossover (SCO) in 150–250 K temperature range. In these frameworks, pillars are formed by a pair molecules (L) linked to iron atoms axial sites. hybrid inorganic–organic solids preserves character inorganic building...