Preliminary Commissioning and Performance of the Soft X-ray Micro-characterization Beamline at the Canadian Light Source

Hu, Yunfeng; Coulthard, I.; Chevrier, D.; Wright, G.M.; Igarashi, R.; Sitnikov, A.; Yates, B.; Hallin, E.; Sham, T. K.; Reininger, R.

doi:10.1063/1.3463208

Cited by 79 publications

(63 citation statements)

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“…The Soft X-ray Microcharacterization Beamline (SXRMB, 06B1-1) located at the Canadian Light Source (CLS) was used to collect the Ti K-edge XANES spectra from the damaged and undamaged RE 2 Ti 2 O 7 (RE = Sm, Eu, Gd, Ho, Yb and Y), Yb 1.85 Ca 0.15-Ti 2 O 7Àd , and Yb 2 Ti 1.85 Fe 0.15 O 7Àd materials using a Si(1 1 1) monochromator [53]. This beamline provides a photon flux of 10 11 photons/s and a resolution of 0.5 eV at 4966 eV [53,54].…”

Section: Xanesmentioning

confidence: 99%

“…This beamline provides a photon flux of 10 11 photons/s and a resolution of 0.5 eV at 4966 eV [53,54]. Spectra from the undamaged materials were collected from powdered materials placed on carbon tape.…”

Section: Xanesmentioning

confidence: 99%

“…All spectra were collected in total electron yield (TEY) mode using a step size of 0.15 eV through the absorption-edge. The angle between the X-ray beam and the implanted pellet was $85°during these measurements [53]. The spectra were calibrated using the K-edge spectrum from Ti metal (4966.0 eV) [54].…”

Section: Xanesmentioning

confidence: 99%

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An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

Aluri

Grosvenor

2014

Journal of Alloys and Compounds

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a b s t r a c tPyrochlore-type oxides (A 2 B 2 O 7 ) have been investigated for nuclear waste sequestration applications due to their overall resistance to radiation-induced structural damage. This damage can be simulated by implanting the materials with high-energy ions to aid in understanding how the structure of a crystalline material responds to radioactive decay of incorporated nuclear waste elements. RE 2 Ti 2 O 7 (RE = La-Lu), Yb 1.85 Ca 0.15 Ti 2 O 7Àd , and Yb 2 Ti 1.85 Fe 0.15 O 7Àd were synthesized by the ceramic method and investigated by Ti K-edge X-ray absorption near edge spectroscopy (XANES) and powder X-ray diffraction before and after being implanted by 2 MeV Au À ions. Surface sensitive total electron yield (TEY) XANES spectra and glancing-angle (GA) XANES spectra were collected to study the ion-implanted materials. It was necessary to use these surface sensitive detection methods because the 2 MeV Au À ions only implant to $450 nm into the surface of the materials. An effective sample mounting procedure has been developed that uses conductive silver paint to collect high quality TEY-XANES spectra from the damaged surface layer of the implanted pellets so as to minimize charging effects. This investigation has shown that the local coordination number of Ti decreased after implantation, and that the degree of damage observed decreases with decreasing radius of the RE cation. The study has also shown that the oxygen vacancies generated by a slight substitution of Yb 3+ for Ca 2+ or Ti 4+ for Fe 3+ does not considerably affect the resistance of Yb 2 Ti 2 O 7 to radiation-induced damage.

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Section: Xanesmentioning

confidence: 99%

Section: Xanesmentioning

confidence: 99%

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An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

Aluri

Grosvenor

2014

Journal of Alloys and Compounds

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“…The Si K edge and Ti K edge X-ray absorption near edge structure (XANES) measurements were obtained using the soft X-ray microcharacterization beamline (SXRMB; 06B1-1) at the Canadian Light Source (CLS). 27 The Si K edge spectra were collected using an InSb(111) crystal monochromator, and the Ti K edge spectra were collected using a Si(111) crystal monochromator in total electron yield (TEY). The spectra were calibrated using Si and Ti reference samples.…”

Section: ■ Introductionmentioning

confidence: 99%

TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

et al. 2013

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Composite nanostrucutres of TiSi 2 O x coated nitrogen-doped carbon nanotubes (NCNTs) were synthesized by a combination of chemical vapor deposition (CVD) and magnetron sputtering processes. The synthesized nanostructures were used as supports for Pt catalyst for oxygen reduction reaction (ORR) in proton exchange memberane fuel cells (PEMFCs). An amorphous layer of TiSi 2 O x with controlled thicknesses was sputtered on NCNTs and followed by post-treatment at high temperature (1000°C, An-TiSi 2 O x -NCNTs), inducing TiO 2 nanoparticles of around 5 nm in diameter embedded in the amorphous layer. Further analyses via X-ray absorption spectroscopy of the Ti K edge and Si K edge revealed the Ti atoms were in a TiO 2 rutile environment and the Si atoms were in a SiO 2 environment. Pt nanoparticles with an average diameter of 3 nm were deposited on the composite support, and their electrochemical behaviors toward ORR were studied. It was revealed that, even with lower electrochemical surface area (ECSA), Pt/An-TiSi 2 O x -NCNTs showed better catalytic activity toward ORR than Pt/NCNT catalysts. The origin of enhanced activity of Pt/An-TiSi 2 O x -NCNTs was examined by high resolution transmission electron microscopy (HRTEM) and the X-ray absorption near edge structure spectra (XANES) of the deposited Pt nanoparticles.

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“…The medium energy X-ray microprobe end station at the SXRMB (06B1-1) line of the Canadian Light Source (CLS) synchrotron was used to collect the two-dimensional XRF maps and the XANES spectra [17]. The beamline is at a bending magnet source and features a pre-mirror (collimation), double crystal monochromator (fixed exit beam), and a post-mirror configuration, specifically design to provide tender X-rays (1.8-8 keV).…”

Section: Synchrotron Analysismentioning

confidence: 99%

Exploring tarnished daguerreotypes with synchrotron light: XRF and μ-XANES analysis

et al. 2018

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We report on the elemental and chemical characterization of tarnish on a historic daguerreotype plate. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy reveal the presence of C, O, Na, K, P, Cl, Hg, Ag, Cu, S and Au. Synchrotron based X-ray absorption near edge structure (XANES) spectroscopy, together with two-dimensional X-ray fluorescence (XRF) microscopy, provide information beyond the elemental distribution and speciation of the daguerreian tarnish features, revealing the presence of NaCl, KCl, HgCl 2 , HgSO 4 , CuS, and Ag 2 S on the surface. Through the application of synchrotron XRF, the distributions of Ag and S were found to be inversely correlated. This suggests a preferential accumulation of S within high-density particle regions. Spectroscopic investigation at different regions within the XRF image showed that blemish regions contained degradation products such as NaCl and KCl with AgCl noted in the surrounding regions. The observation of Cu on the surface, in the form of CuS, may either be a result of Cu diffusing through grain boundaries and/or holes in the Ag, or from the accretion of Cu salts, such as basic sodium copper carbonate, from the deterioration of the above cover glass. Silver halides (AgCl, AgBr and AgI) were also detected with XANES. This may be the result of either environmental conditions or from residual products from the production process of the plate. These results point to the interaction between deterioration products from the cover glass with the daguerreotype surface as one, but not the only, source of the tarnish.

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Preliminary Commissioning and Performance of the Soft X-ray Micro-characterization Beamline at the Canadian Light Source

Cited by 79 publications

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An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

Exploring tarnished daguerreotypes with synchrotron light: XRF and μ-XANES analysis

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Preliminary Commissioning and Performance of the Soft X-ray Micro-characterization Beamline at the Canadian Light Source

Cited by 79 publications

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An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

An investigation of the electronic structure and structural stability of RE2Ti2O7 by glancing angle and total electron yield XANES

TiSi2Ox Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs

Exploring tarnished daguerreotypes with synchrotron light: XRF and μ-XANES analysis

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TiSi₂O_x Coated N-Doped Carbon Nanotubes as Pt Catalyst Support for the Oxygen Reduction Reaction in PEMFCs