Results 21 to 30 of about 13,531 (230)

Radiation Effects in Electret Organic Thin-Film Transistors Due to High Flux and High Dose X-Ray Irradiation. [PDF]

Adv Mater
Electret‐style organic thin‐film transistors are evaluated for synchrotron X‐ray dosimetry at ultra‐high dose rates, showing promising performance and agreement with standard detectors. XPS and NEXAFS reveal radiation‐induced oxidation and Fermi level shifts in pentacene and polystyrene, correlating with reduced charge carrier mobility and providing ...
Mitchell A, Posar JA, Cayley J, York G, Lerch M, Mozer AJ, Píš I, Magnano E, Tosti L, Pedio M, Syme A, Hill IG, Petasecca M.   +12 more
europepmc   +2 more sources

High-Resolution Table-Top NEXAFS Spectroscopy [PDF]

Analytical Chemistry, 2022
A table-top near-edge X-ray absorption fine structure (NEXAFS) spectroscopy system consisting of a soft X-ray source and an integrated spectrometer with a significantly improved resolution is presented. The soft X-ray source is based on a long-term stable and nearly debris-free picosecond laser-induced plasma generated in a pulsed krypton gas jet ...
Jonathan Holburg, Matthias Müller, Klaus Mann, Philip Wild, Karin Eusterhues, Jürgen Thieme   +5 more
openaire   +3 more sources

Quantitative Characterization of Oxygen-Containing Groups on the Surface of Carbon Materials: XPS and NEXAFS Study

Applied Sciences, 2022
The results of the comparative quantitative study of oxygen-containing groups adsorbed on the surface of carbonized sponge scaffold (CSS), highly oriented pyrolytic graphite (HOPG), fullerite C60 and multi-walled carbon nanotubes (MWCNTs) introduced into
D. Sivkov, O. V. Petrova, S. Nekipelov, A. Vinogradov, R. Skandakov, K. A. Bakina, S. Isaenko, A. Ob’’edkov, B. Kaverin, I. Vilkov, V. Sivkov   +10 more
semanticscholar   +1 more source

Determination of H-Atom Positions in Organic Crystal Structures by NEXAFS Combined with Density Functional Theory: a Study of Two-Component Systems Containing Isonicotinamide

Journal of Physical Chemistry A, 2022
It is important to be able to identify the precise position of H-atoms in hydrogen bonding interactions to fully understand the effects on the structure and properties of organic crystals. Using a combination of near-edge X-ray absorption fine structure (
P. Edwards, Lucy K. Saunders, D. Grinter, P. Ferrer, G. Held, E. Shotton, S. Schroeder   +6 more
semanticscholar   +1 more source

NEXAFS multiple scattering calculations of KO₂ [PDF]

Journal of Synchrotron Radiation, 2001
Since many years the oxidation of alkali metals has being attracted much interest due to the catalytic properties of metal promoters and the simple electronic structure of alkali atoms. The alkali-oxides phase diagram indicates that the interaction of oxygen with alkali metals can lead to the formation of different atomic O2- ions and molecular O2
M Pedio, ZY Wu, M Benfatto, A Mascaraque, E Michel, C Crotti, M Peloi, C Comicioli   +7 more
openaire   +4 more sources

Calibrated NEXAFS spectra of common conjugated polymers [PDF]

The Journal of Chemical Physics, 2011
Near edge x-ray absorption fine structure (NEXAFS) spectroscopy has evolved into a powerful characterization tool for polymeric materials and is increasingly being used to elucidate composition and orientation in thin films of relevance to organic electronic devices.
B, Watts, S, Swaraj, D, Nordlund, J, Lüning, H, Ade   +4 more
openaire   +2 more sources

NEXAFS Spectra Simulations of Nitrogen-Bearing Heterocycles

ACS Omega
Five-membered heterocyclic compounds containing nitrogen atoms are important biomolecule building blocks. In addition to their fundamental biological importance, these molecular structures are used in several technological applications. Consequently, it is essential to develop techniques that allow the characterization of these fundamental systems.
Ricardo R. Oliveira, Amanda D. Torres, Alexandre B. Rocha   +2 more
doaj   +3 more sources

Efficient simulation of near-edge x-ray absorption fine structure (NEXAFS) in density-functional theory: Comparison of core-level constraining approaches. [PDF]

Journal of Chemical Physics, 2019
Widely employed Near-Edge X-Ray Absorption Fine Structure (NEXAFS) spectroscopy probes a system by excitation of core electrons to unoccupied states.
Georg S. Michelitsch, K. Reuter
semanticscholar   +1 more source

Aging induced changes in ice nucleation activity of combustion aerosol as determined by near edge X-ray absorption fine structure (NEXAFS) spectroscopy.

Environmental Science: Processes & Impacts, 2020
Fresh soot particles are generally hydrophobic, however, particle hydrophilicity can be increased through atmospheric aging processes. At present little is known on how particle chemical composition and hydrophilicity change upon atmospheric aging and ...
F. Mahrt, P. Alpert, Jing Dou, P. Grönquist, P. C. Arroyo, M. Ammann, U. Lohmann, Z. Kanji   +7 more
semanticscholar   +1 more source

How Amino Acids Intercalate in CaFe Layered Double Hydroxides: A Combined RIXS and NEXAFS Study. [PDF]

Chemphyschem
Intercalation of amino acids in layered double hydroxides offers a road to functional (bio)catalysts. With resonant soft x‐ray spectroscopy we probe the electronic structure of these systems and observe activation and passivation of electronic states as well as bond formation between the amino acid and the LDH upon intercalation.
Büchner R, Born A, Ruotsalainen K, Decker R, Pietzsch A.   +4 more
europepmc   +2 more sources