Results 11 to 20 of about 134,130 (301)

Unsupervised Machine Learning for Unbiased Chemical Classification in X-ray Absorption Spectroscopy and X-ray Emission Spectroscopy [PDF]

open access: yesPhysical Chemistry Chemical Physics, 2021
We utilize unsupervised machine learning to extract chemically relevant information in X-ray absorption near-edge structure (XANES) and in valence-to-core X-ray emission spectra (VtC-XES) for classification of an ensemble of sulphorganic molecules.
Samantha Tetef   +2 more
openaire   +3 more sources

Modern x-ray spectral methods in the study of the electronic structure of actinide compounds: Uranium oxide UO2 as an example [PDF]

open access: yesNuclear Technology and Radiation Protection, 2004
Fine X-ray photo electron spectral (XPS) structure of uranium dioxide UO2 in the binding energy (BE) range 0-~č40 eV was associated mostly with the electrons of the outer (OVMO) (0-15 eV BE) and inner (IVMO) (15-40 eV BE) valence molecular orbitals ...
Teterin Yury A., Teterin Anton Yu.
doaj   +1 more source

SnCl4/nano-sawdust as an Efficient Bio-based Catalyst for the Synthesis of 2-Substituted Benzothiazoles and Benzimidazoles [PDF]

open access: yesJournal of Nanostructures, 2019
SnCl4/nano-sawdust was prepared as a carbohydrate-based catalyst containing of tin bearing cellulose units. The catalyst was characterized by X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), field emission scanning electron ...
Bi Bi Fatemeh Mirjalili   +3 more
doaj   +1 more source

Data acquisition system of a von Hamos X-ray emission spectrometer based on PILATUS detector

open access: yesHe jishu, 2022
BackgroundHigh energy resolution X-ray emission spectroscopy (XES) has higher energy resolution than conventional X-ray absorption fine structure spectroscopy (XAFS), hence a powerful tool to explore the fine electronic structure of matter.
GU Songqi   +3 more
doaj   +1 more source

Impact of Nitrogen, Boron and Phosphorus Impurities on the Electronic Structure of Diamond Probed by X-ray Spectroscopies

open access: yesC, 2021
Doping diamond with boron, nitrogen or phosphorus enables a fine tuning of its electronic properties, which is particularly relevant for applications involving electron emission.
Sneha Choudhury   +9 more
doaj   +1 more source

Fabrication of a New Electrochemical Sensor Based on Bimetal Oxide for the Detection of Furazolidone in Biological Samples

open access: yesMicromachines, 2022
This study utilized a simple hydrothermal method to synthesize nickel molybdenum oxide (NMO) for the detection of furazolidone (FZE). Our synthesized NMO was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman ...
Ruspika Sundaresan   +4 more
doaj   +1 more source

Quantum Chemical Calculations of X-ray Emission Spectroscopy [PDF]

open access: yesJournal of Chemical Theory and Computation, 2014
The calculation of X-ray emission spectroscopy with equation of motion coupled cluster theory (EOM-CCSD), time-dependent density functional theory (TDDFT), and resolution of the identity single excitation configuration interaction with second-order perturbation theory (RI-CIS(D)) is studied.
Wadey, J.D., Besley, Nicholas A.
openaire   +3 more sources

BF3/nano-γ-Al2O3 Promoted Knoevenagel Condensation at Room Temperature [PDF]

open access: yesJournal of Nanostructures, 2015
The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol.
B. F. Mirjalili   +2 more
doaj   +1 more source

Visualizing the valence states of europium ions in Eu-doped BaAl2O4 using X-ray nanoprobe mapping

open access: yesJournal of Synchrotron Radiation, 2022
This study develops and successfully demonstrates visualization methods for the characterization of europium (Eu)-doped BaAl2O4 phosphors using X-ray nanoprobe techniques.
Yu-Hao Wu   +10 more
doaj   +1 more source

Selenium Valence-to-Core X-ray Emission Spectroscopy and Kβ HERFD X-ray Absorption Spectroscopy as Complementary Probes of Chemical and Electronic Structure

open access: yes, 2021
Selenium X-ray absorption spectroscopy (XAS) has found widespread use in investigations of Se-containing materials, geochemical processes, and biological active sites.
Justin T., Henthorn, Serena, DeBeer
core   +1 more source

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