Results 61 to 70 of about 11,563 (263)

Theoretical Calculation of Finite‐Temperature X‐Ray Absorption Fine Structure: Application to Sodium K‐Edge in NaCl

ChemElectroChem
This study presents a comprehensive computational framework for reproducing the full X‐ray absorption fine structure (XAFS) through quantum‐chemical simulations.
Philipp Hönicke, Yves Kayser, Pouya Partovi‐Azar   +2 more
doaj   +1 more source

Sub-nanometre resolution of atomic motion during electronic excitation in phase-change materials

, 2016
Phase-change materials based on Ge-Sb-Te alloys are widely used in industrial applications such as nonvolatile memories, but reaction pathways for crystalline-to-amorphous phase-change on picosecond timescales remain unknown. Femtosecond laser excitation
Bragaglia, Valeria, Brewe, Dale, Calarco, Raffaella, Fons, Paul, Giussani, Alessandro, Hase, Muneaki, Katayama, Tetsuo, Kolobov, Alexander V., Makino, Kotaro, Mitrofanov, Kirill V., Ogawa, Kanade, Riechert, Henning, Sato, Takahiro, Shimada, Toru, Terashima, Ryo, Togashi, Tadashi, Tominaga, Junji, Wall, Simon, Yabashi, Makina   +18 more
core   +1 more source

Chemical analysis by X-ray spectroscopy near phase transitions in the solid state [PDF]

, 2002
The methods discussed in this work show that the types of changes which may be observed, by precise XAS measurements of Absorbance A versus temperature, across a phase transition are: the changes in the relaxation time of the final states due to ...
Acrivos, Juana Vivó, Honig, J. M, Liang, W. Y, Lin, C. T, Nguyen, L., Norman, T., Somasundaran, P   +6 more
core   +2 more sources

In Situ Amine Formation to Modulate MOF‐Derived PdIn N‐Doped Carbon Catalysts

Advanced Materials, EarlyView.
An amine‐assisted approach converts PdIn‐MOF into PdIn intermetallic nanoparticles embedded in N‐doped carbon. In situ‐generated amines trigger early Pd nucleation, producing smaller PdIn domains than direct pyrolysis. Amine sterics and basicity tune composition and particle size, while solvent and amine co‐determine textural features.
Gonzalo Egea, Jordan Santiago Martinez, M. Asunción Molina, Jaime Mazarío, Lucy Costley‐Wood, Christian Cerezo‐Navarrete, Carlo Marini, Eduardo Villalobos‐Portillo, Andrew M. Beale, Pascual Oña‐Burgos   +9 more
wiley   +1 more source

Operando XAFS and XRD Study of a Prussian Blue Analogue Cathode Material: Iron Hexacyanocobaltate

Condensed Matter, 2018
The reversible electrochemical lithiation of potassium iron hexacyanocobaltate (FeCo) was studied by operando X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS) assisted by chemometric techniques.
Angelo Mullaliu, Paolo Conti, Giuliana Aquilanti, Jasper Rikkert Plaisier, Lorenzo Stievano, Marco Giorgetti   +5 more
doaj   +1 more source

Synchrotron XANES and EXAFS evidences for Cr+6 and V+5 reduction within the oil shale ashes through mixing with natural additives and hydration process

Heliyon, 2021
Solid friable residues (i.e. Ash) from combusted oil shale are a major environmental issue because they are highly enriched with toxic elements following combustion.
Tayel El-Hasan, Messaoud Harfouche, Allayth Aldrabee, Nafeth Abdelhadi, Nizar Abu-Jaber, Giuliana Aquilanti   +5 more
doaj   +1 more source

Polymorph‐Specific Electronic Transduction in WO3 during Molecular Sensing

Advanced Materials, EarlyView.
Metal‐oxide polymorphs with similar surface chemistry can nevertheless exhibit distinct sensing properties. In γ‐ and ε‐WO3, analyte adsorption appears comparable; yet, only ε‐WO3 induces a pronounced lattice electronic perturbation that accommodates charge in sub‐conduction band minimum states.
Matteo D'Andria, Meng Yin, Stefan Neuhauser, Vlasis G. Mavrantzas, Ying Chen, Ken Suzuki, Andreas T. Güntner   +6 more
wiley   +1 more source

A new QEXAFS system on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility

Journal of Synchrotron Radiation, 2022
A new quick-scanning extended X-ray absorption fine-structure (QEXAFS) system for in situ studies has been developed and tested on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility. In the new system, an analog-to-digital converter
Yongnian Zhou, Songqi Gu, Ying Zhao, Zheng Jiang, Zhaohong Zhang   +4 more
doaj   +1 more source

Spatial distribution of photoelectrons participating in formation of x-ray absorption spectra

, 2002
Interpretation of x-ray absorption near-edge structure (XANES) experiments is often done via analyzing the role of particular atoms in the formation of specific peaks in the calculated spectrum. Typically, this is achieved by calculating the spectrum for
A. Šimůnek, B. Poumellec, C.R. Natoli, C.R. Natoli, D. Dill, D.D. Vvedensky, D.D. Vvedensky, F. Bridges, F. Farges, G. Bergerhoff, G. Breit, H.A. Bethe, J. Mustre de Leon, J.E. Müller, J.J. Rehr, L.A. Bugaev, O. Šipr, O. Šipr, O. Šipr, O. Šipr, O. Šipr, P.A. Lee, P.J. Durham, S. Bocharov, S. Della Longa, S.I. Zabinsky, T. Uozumi, V. Jeanne-Rose, V. Jeanne-Rose, W. Kohn, W.E. Pickett, X.S. Feng, Y. Joly, Yu.F. Migal, Z.Y. Wu, Z.Y. Wu   +35 more
core   +2 more sources

Identification of single-site gold catalysis in acetylene hydrochlorination [PDF]

, 2017
There remains considerable debate over the active form of gold under operating conditions of a recently validated gold catalyst for acetylene hydrochlorination.
Catlow, C. Richard A., Davies, Catherine J., Dawson, Simon, Freakley, Simon J., Gibson, Emma K., Hutchings, Graham J., Johnston, Peter, Jones, Wilm, Kiely, Christopher J., Kondrat, Simon A., Lu, Li, Malta, Grazia, Morgan, David J., Thetford, Adam, Wells, Peter P.   +14 more
core   +4 more sources