X-ray spectroscopy codes were applied to achieve quantitative interpretation of x-ray absorption near edge structure

... Descriptive Note : Final technical rept., 1 Feb 64-31 Jan 66. ... of the sensitivity of absorption edge position to valence in a series of iron compounds. ...

The object of the research program is the evaluation of X-ray absorption edge spectroscopy as a research tool for the direct determination of valence, bond type, and coordination of compounds in the solid state. Progress in the following areas is summariz...

... X-Ray absorption near edge spectroscopy (XANES); Co-K-edge EXAFS spectra were collected at the Stanford Synchrotron Radiation Laboratory ...

... Synchrotron radiation-excited photoemission spectroscopy and x-ray absorption spectroscopy (XAS ... of the C, N and F K-edge electronic structure of ...

The Li K absorption edge was measured with yield spectroscopy at liquid nitrogen temperature. The broad feature hitherto considered to be the edge is shown to be a combination of a sharp absorption edge corresponding to a 0.18 eV wide Li K core level and a rising ...

X-ray absorption spectroscopy is a particularly promising tool for characterizing amorphous materials such as glass. The problems that hinder this application are (1) difficulties in obtaining adequate spectral resolution and definition, (2) appropriate i...

The oxygen binding site of hemocyanin has two copper atoms coordinated to the side chains from the polypeptide chain. Copper extended x-ray absorption fine structure (EXAFS) and absorption edges of the protein were studied. Comparison of EXAFS from three ...

In this study, wheat leaves infected with brown rust, a plant disease of serious economic concern caused by the fungus Puccinia triticina, were investigated using spatially resolved XANES (X-ray Absorption Near Edge Structure) spectroscopy at the sulfur K-absorption edge.

X-ray absorption spectroscopy is now being applied to the study of a wide range of surface structures. The usefulness of surface EXAFS (SEXAFS) is illustrated by reviewing measurements on the oxidation of aluminum, the absorption of Te and I on silicon an...

One of the long term research goals has been to attain a quantitative theory of deep core X-ray spectroscopies. These spectroscopies include X-ray absorption fine structure (XAFS), X-ray absorption near edge structure (XANES), X-ray magnetic circular dich...

Using photothermal deflection spectroscopy, the optical absorption of various a-Si:H films was investigated in the range of 2.1 to 0.6 eV. An absorption shoulder which depends on deposition conditions and on doping was found and was attributed to dangling bonds. The exponential edge broadens with increasing spin ...

The sulfur 2p absorption edge and valence band resonant photoelectron spectra of molybdenum disulfide (MoS2), obtained using synchrotron radiation, are compared to the Mo 4p edge results from previous work. A pre-edge feature in the S 2p data shows transi...

When two or more absorption edges in a material are sufficiently close in energy, Extended X-ray- Absorption Fine-Structure (EXAFS) spectroscopy is of limited utility as the usable data range above the lower energy edge is truncated by the higher energy e...

K-absorption edge of coordinated ions exhibits a fine structure (through the use of XANES, or x-ray absorption near edge structures) that reflects the electronic repartition and the chemical reactivity of these ions. Comparative analysis of iron K-absorption-edge shape for hemoglobin ...

... Lengeler et. al.(1 L ) applied x-ray absorption to the determination ... best fit to the copper K-edge of the superconductor was made, giving ...

near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy, allows for quantitative determination of submicron polymer blend composition. At a lateral resolution of 50 nm,...

... establishment of absorber sample preparation techniques; measurement of initial calibration spectra using several copper compounds; study of ...

The nanographite grains, the diameter of which was around 5 nm, were formed on Pt(111) by exposing the Pt(111) substrate to benzene gas at room temperature and annealing it up to 850 K. The increase of relative number of edge atoms enabled the observation of edge-derived electronic states. The measurement of ultraviolet photoelectron ...

Manganese model complexes, relevant to the oxygen-evolving complex (OEC) in photosynthesis, were studied with Mn K-edge X-ray absorption near-edge spectroscopy (XANES), Mn Kb X-ray emission spectroscopy (XES), and vibrational spectroscopy. A more detailed...

... Nevertheless, iron K-edge XANES is highly effective at identify- ing and quantifying ... 4.1.2.1 X-Ray Absorption near Edge Structure Spectroscopy ...

The research presented elucidates the oxidation chemistry occurring in hydrogen peroxide bleached kraft pulp fibers by employing carbon near edge x-ray ... ...

... Near edge X-ray absorption fine structure (NEXAFS) spectroscopy ... The X-ray beam was elliptically polarized ... which in- cludes the carbon K edge. ...

A study of the Mn K absorption pre-edges in oxides using resonant inelastic X-ray scattering (RIXS) spectroscopy is presented. The energy transfer dimension enhances the separation of the pre-edge (predominantly 1s to 3d transitions) from the main K-edge and a detailed analysis is thus ...

... X-ray absorption fine structure (XAFS) spectroscopy is an ... were examined initially by powder X-ray diffraction (XRD ... around the Ni K-edge (8333 eV ...

Resonant annihilation of extremely high-energy cosmic neutrinos on big-bang relic anti-neutrinos (and vice versa) into Z-bosons leads to sizable absorption dips in the neutrino flux to be observed at Earth. The high-energy edges of these dips are fixed, v...

X-ray Photo Emission Electron Microscopy (X-PEEM) and Near Edge X-ray Absorption Fine Structure (NEXAFS) spectroscopy were applied to study the properties of amorphous hard carbon overcoats on disks and sliders, and the properties of the lubricant. The mo...

Near-Edge X-ray Absorption Fine Structure Spectroscopy of MDI and TDI Polyurethane Polymers Stephen) to differences in key chemical components of polyurethane polymers is presented. Carbon 1s NEXAFS spectra of polyurethane polymers made from 4,4-methylene di-p-phenylene isocyanate (MDI) and toluene diisocyanate (TDI

of the DCM was calibrated relative hal-00261713,version1-8Mar2008 #12;15 to the Au K-edge of metallic gold-ray absorption near-edge spectroscopy) and EXAFS (extended x-ray absorption fine- structure) spectroscopy. Iterative transformation factor analysis of XANES and EXAFS ...

This review gives a brief description of the theory and application of X-ray absorption spectroscopy, both X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS), especially, pertaining to photosynthesis. The advantages and limitations of the methods ...

... Accession Number : ADA262589. Title : Photoelectron Spectroscopy of MoS2 at the Sulfur 2p Absorption Edge. Descriptive Note : Technical rept. ...

Step edge structures on H-terminated Si (112) and (113) surfaces have been investigated with infrared absorption spectroscopy. NH4F acid is used to prepare almost straight bilayer step edges on the surfaces. It has been found that the step edges with the dihydride fluctuate within the width ...

Near edge x-ray absorption fine structure (NEXAFS) and infrared reflection-absorption spectroscopy (IRRAS) have been used to study the orientational behavior of thin films of poly(3-methylthiophene) electrochemically polymerized on a platinum surface. Cle...

Although Absorption Edge Spectroscopy has been widely applied to the speciation of actinide elements, specifically at the L{sub III} edge, understanding and interpretation of actinide edge spectra are not complete. In that sense, semi-quantitative analysis is scarce. In this paper, different ...

The results of ultrafast selected energy x-ray absorption spectroscopy (USEXAS) investigations of Ni and Zn species are presented. The USEXAS measurements described here employed characteristic x-ray radiation of L(alpha) and L(beta) from an ultrafast laser-driven W x-ray target to probe the K absorption edges of ...

Systematic Mn K-edge x-ray absorption spectroscopy (XAS) measurements on samples of La(sub 1(minus)x)Sr(sub x)MnO(sub 3), which are precursors to colossal magnetoresistive (CMR) materials, are reported. Detailed results on the edge or chemical shift as a ...

We have used time-resolved soft x-ray spectroscopy to investigate the electronic structure of optically excited cuprous oxide at the O K-edge and the Cu L3-edge. The 400 nm optical excitation shifts the Cu and O absorptions to lower energy, but does not change the integrated x-ray absorption ...

We have used time-resolved soft x-ray spectroscopy to investigate the electronic structure of optically excited cuprous oxide at the OK edge and the CuL3 edge. The 400 nm optical excitation shifts the Cu and O absorptions to lower energy, but does not change the integrated x-ray absorption ...

We present a compact setup for near-edge x-ray absorption spectroscopy at the carbon K-edge based on a laser-driven plasma source. Thin polymer films were investigated, showing good agreement with corresponding synchrotron data. Furthermore we have examined the carbon near-edge structure of ...

High pressure x-ray absorption has been performed down to 3.6 keV, thanks to the new LUCIA beamline (SLS, PSI) and to the use of perforated diamonds or Be gasket. Various experimental geometries are proposed, depending on the energy of the edge and on the concentration of the studied element. A few examples will be presented: BaTiO3 at the titanium K ...

In this work, in-situ x-ray absorption spectroscopy (XAS) measurements of the ion concentrations within an artificial pit are presented to study the ionic species present and mass transport phenomena during localized corrosion taking place on metal surfaces. The x-ray absorption by an element in a sample is markedly greater at an ...

Sputter deposited non-stoichiometric tantalum nitride films are oxidized in air between 200 and 500{degrees}C to form a passive film. The oxidized films have been studied with x-ray absorption near edge spectroscopy (XANES) and extended x-ray absorption near edge ...

Sputter deposited non-stoichiometric tantalum nitride films are oxidized in air between 200 and 500{degrees}C to form a passive film. The oxidized films have been studied with x-ray absorption near edge spectroscopy (XANES) and extended x-ray absorption near edge ...

... Title : THE SHAPE OF THE ABSORPTION EDGE OF AMORPHOUS GERMANIUM, SILICON, INDIUM ANTIMONIDE, GALLIUM ANTIMONIDE ...

... Title : Scattering Coefficients and the Absorption Edge of Longitudinal Coherent Sound Waves in Selected Inhomogeneous Materials. ...

Journal of Electron Spectroscopy and Related Phenomena 154 (2007) 60�62 Investigation of vanadium. Keywords: XANES; Vanadium�sodium silicate glasses; V L2,3 edges; O K edge 1. Introduction Studies on oxide vanadium-sodium silicate glasses. X-ray absorption near edge structure (XANES) ...

A technique to suppress the core-hole lifetime broadening in near- edge x-ray spectroscopy is presented. A simple theoretical explanation based on total energy conservation in the fluorescence process is given to explain the improved resolution. The experimental arrangement is shown together with an application to the L[sub III] edge ...

A technique to suppress the core-hole lifetime broadening in near- edge x-ray spectroscopy is presented. A simple theoretical explanation based on total energy conservation in the fluorescence process is given to explain the improved resolution. The experimental arrangement is shown together with an application to the L{sub III} edge ...

Structural investigations of the short range order around iridium and oxygen ions in nanocrystalline iridium oxide thin films, prepared by dc magnetron sputtering technique, were performed by x-ray absorption spectroscopy. The Ir L3-edge extended x-ray absorption fine structure and the O K-edge ...

The utility of sulfur K-edge X-ray absorption spectroscopy for the determination and quantification of sulfur forms in petroleum asphaltenes has been investigated. Both X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) spectra ...

We demonstrate the feasibility of near edge x-ray absorption fine structure spectroscopy on solids by means of femtosecond soft x-ray pulses from a free-electron laser (FEL). Our experiments, carried out at the FEL at Hamburg used a special sample geometry, spectrographic energy dispersion, single shot position-sensitive detection, and ...

The question of valence of Cu and rare-earth atoms in the newly discovered oxide superconductors with high transition temperatures is crucial to the understanding of their electronic structure. X-Ray Absorption Near Edge Structure and Moessbauer Spectrosc...

Crystal spectrometry and absorption edge technique have the capability to overcome the gap in accuracy between experiment and theory in the strong field domain of QED. New results are presented which indicate the capacity of these methods to measure the energies of X-rays emitted by highly charged heavy ions at modern storage rings with a precision ...

Density of states changes in the valence and conduction band of silicon nanoclusters were monitored using soft x-ray emission and absorption spectroscopy as a function of cluster size. a progressive increase in the valence band edge toward lower energy is found fro clusters with decreasing diameters. A similar but smaller shift is ...

The L shell x-ray absorption near edge structure (XANES) for the 3d transition metals Ca-Cu is dominated by atomic-like behavior which is poorly understood. It has been studied by electron energy loss spectroscopy (EELS) and bremsstrahlung isochromat spec...

X-ray absorption fine spectra at the Al K-edge were measured experimentally on and calculated theoretically via the multiple-scattering formalism for a chemically pure and physically perfect synthetic (alpha)-Al(sub 2)O(sub 3) ((alpha)-alumina), a natural...

to the formation of protonated surface groups, and (2) the change in surface charge due to HA sorption. Boron KAdsorption of Boric Acid on Pure and Humic Acid Coated am-Al(OH)3: A Boron K-Edge XANES Study D A N. Boron (B) K-edge X-ray absorption near-edge structure (XANES) spectroscopy was used ...

X-ray absorption near-edge spectroscopy (XANES) of the L1- and L3-edges of transition metals (W, Re, Ir) oxides has been studied in the ``ADONE'' synchrotron source. The distortion of oxygen polyhedra and the metal valence state correlate with the amplitude of the pre-edge peak in L1-spectra ...

Brush-like ZnO/TiO2 core-shell nanostructures have been prepared by a two-step route combined with hydrothermal method and magnetron sputter. Electronic properties of these interesting nanostructures were investigated by both photoelectron spectroscopy and X-ray absorption. Near edge X-ray absorption were measured ...

We present analytical theory of dissipative soliton absorption spectroscopy. A dissipative soliton formed in an all-normal-dispersion oscillator with a narrowband intracavity absorber acquires spectral features that follow the index of refraction of the absorber, as confirmed by numerical simulations and experimental evidence. In contrast to the soliton ...

... of this systematic investigation is to gain further understanding of the details of various absorption features in the vicinity of the K absorption edge of ...

We have performed a near-edge x-ray absorption fine-structure (NEXAFS) investigation of multi-walled boron nitride nanotubes (BNNTs). We show that the one-dimensionality of BNNTs is clearly evident in the B K edge spectrum, while the N K edge spectrum is similar to that of layered hexagonal BN (h-BN). We observe a ...

Using optical absorption and ?-modulated differential spectroscopy we investigated non-doped and Fe-doped Bi12SiO20 sillenite-type crystals. The obtained results show that the doping increase absorption coefficient of the crystal shifts the absorption edge to lower photon energies, and reduce ...

X-ray absorption spectroscopy at the C K edge has been performed on carbon nanotubes to demonstrate the capability of the technique to investigate the electronic structure of these systems. We compare and discuss the experimental results achieved on both graphite and nanotubes trying also to determine the relationship between multiple ...

We have investigated electronic structures of graphite oxide using x-ray absorption spectroscopy at carbon and oxygen K-edges. Unoccupied states such as ?^* and ?^* states originating from sp^2 hybridization in graphite are also visible in the graphite oxide, even though the graphite oxide experiences a severe oxidation. Additional ...

We have investigated the electronic structure of graphite oxide using X-ray absorption spectroscopy at the carbon and oxygen K-edges. The unoccupied ?* and ?* states associated with sp2 hybridization in graphite, are also apparent in the graphite oxide, which indicates that it has a graphitic structure even though it experiences ...

X-ray Absorption Spectroscopy (XAS) of the Rare Earth (RE) 3d levels yields sharp peaks near the edges as a result of strong, quasi-atomic 3d(sup 10)4f(sup n) (yields) 3d-(sup 9)4f(sup n+1) transitions and these transitions exhibit a wealth of spectroscop...

Applications of x-ray absorption near-edge spectroscopy (XANES) and the design of cells for in situ corrosion studies are reviewed. Passive films studies require very thin metal or alloy layers be used having a thickness of the order of the films formed b...

... high resolution IR absorption spectroscopy in ... Descriptors : *HYDROGEN, *ABSORPTION, *SOLID ... PROPERTIES, INFRARED SPECTROSCOPY ...

Density of states changes in the valence and conduction band of silicon nanoclusters were monitored using soft x-ray emission and absorption spectroscopy as a function of cluster size. A progressive increase in the valence band edge toward lower energy is...

response to direct excitation of the O-H stretch mode at 3 m, probed via soft X-ray absorption spectroscopy at the oxygen K-edge. This approach employs a newly developed...

and poly(9,9'-dioctylfluorene-co-benzothiadiazole) (F8BT). STXM, in conjunction with the chemical sensitivity of near-edge x-ray absorption fine-structure (NEXAFS) spectroscopy,...

more competitive for widespread implementation was obtained using near-edge x-ray absorption fine structure (NEXAFS) spectroscopy performed at ALS Beamline 8.0.1. The relevant...

We present C-, N-, and O-XANES (X-ray Absorption Near-Edge Spectroscopy) results of organic residues

STXM and C-NEXAFS (carbon near edge absorption micro-spectroscopy) microanalysis were used to analysis the microchemistry of cokes and highly carbonaceous materials. The issue of molecular orientation is addressed by using the intrinsic polarization of th...

Diamondoids, hydrocarbon molecules with cubic-diamond-cage structures, have unique properties with potential value for nanotechnology. The availability and ability to selectively functionalize this special class of nanodiamond materials opens new possibil...

... analysis of the kX spectrum up to 800 eV above the K edge. ... We have applied extended x-ray absorption fine structure (EXAFS) spectroscopy [1] to ...

The following were studied: confinement of block copolymers, free surface confinement, effects of substrate interactions, random copolymers at homopolymer interfaces, phase separation in thin film polymer mixtures, buffing of polymer surfaces, and near edge x-ray absorption fine structure spectroscopy.

. Nucleic Acids Res. 23:3627�32 7. Peterlinz KA, Georgiadis RM, Herne TM, Tarlov MJ. 1997. J. Am. Chem. Soc

-ray absorption near edge structure (�XANES) spectroscopy. Zinc is predominantly incorporated in calcite, and cadmium in calcite and vaterite. Aragonite, which occurs occasionally, does not seem to contain trace metals. In addition to being precipitated in its three possible polymorphic forms, calcite, aragonite

An x-ray spectrometer devoted to dynamical studies of transient systems using the x-ray absorption fine spectroscopy technique is presented in this article. Using an ultrafast laser-induced x-ray source, this optical device based on a set of two potassium acid phthalate conical crystals allows the extraction of x-ray absorption ...

An x-ray spectrometer devoted to dynamical studies of transient systems using the x-ray absorption fine spectroscopy technique is presented in this article. Using an ultrafast laser-induced x-ray source, this optical device based on a set of two potassium acid phthalate conical crystals allows the extraction of x-ray absorption ...

Fluorescent-yield X-ray absorption spectroscopy (XAS) taken with a superconducting tunnel junction (STJ) detector has been employed to study the oxygen K-edge structure of Hf Al oxide gate insulators for next-generation metal-oxide-semiconductor (MOS) devices. Thermal stability is a critical issue in the MOS fabrication processes. We ...

It is presented an x-ray absorption spectroscopy (XAS) investigation performed at the L-edges of the rare-earth and at the K-edge of iron in the R-Fe intermetallic compounds (La, Ce)(sub 2)Fe(sub 14)BH(sub (chi)) and Ce(sub 2)Fe(sub 17)(H, N)(sub (chi)), ...

We study the electronic structure of three-dimensional nanoporous CeO2?x monoliths (aerogels) by soft x-ray absorption near-edge structure (XANES) spectroscopy. Atomic multiplet calculations are used to interpret high-resolution CeM4,5 - and N4,5 -edge XANES spectra. Results show that aerogels with thicker ...

The X-ray absorption near-edge spectroscopy (XANES) technique has been used to determine the chemical change of elements induced by bark diseases in Havea brasiliensis (rubber latex tree). The results show the good sensitivity of in situ XANES for characterizing the chemical structure of phosphorus, sulfur, potassium and calcium in ...

A program to investigate the x-ray absorption behavior of materials subjected to high pressures has been continued. Of particular interest has been the EXAFS (extended x-ray absorption fine structure) and XANES (x-ray absorption near edge structure). Mate...

The techniques of extended x-ray absorption fine structure (EXAFS), and x-ray absorption edge spectroscopy (XAES) are used to obtain specific structural information about the manganese coordination environment in synthetic inorganic complexes, and in biol...

X-ray absorption spectroscopy (XAS) is a useful tool for obtaining structural and chemical information about the active sites of metalloproteins and metalloenzymes. Information may be obtained from both the edge region and the extended X-ray absorption fi...

The electronic structures of HgII, NiII, CrIII, and MoV complexes with cysteine were investigated by sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy and density functional theory. The covalency in the metal-sulfur bond was determined by analyzing the intensities of the electric-dipole ...

The electronic structures of Hg{sup II}, Ni{sup II}, Cr{sup III}, and Mo{sup V} complexes with cysteine were investigated by sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy and density functional theory. The covalency in the metal-sulfur bond was determined by analyzing the intensities of ...

Near edge x-ray absorption fine structure (NEXAFS) spectroscopy at the nitrogen and carbon K-edges was used to study the hydration of adenosine triphosphate in liquid microjets. The total electron yield spectra were recorded as a function of concentration, pH, and the presence of sodium, magnesium, and copper ions ...

We study the temperature evolution of aluminum nanoparticles generated by femtosecond laser ablation with spatiotemporally resolved x-ray-absorption fine-structure spectroscopy. We successfully identify the nanoparticles based on the L-edge absorption fine structure of the ablation plume in combination with the ...

The sensitivity of x-ray absorption edge spectra and extended x-ray absorption fine structure (EXAFS) to the environment of metal atoms make x-ray absorption spectroscopy a useful probe of the environment of the molybdenum in nitrogenase. It is of particular interest to investigate any ...

. Experimental Section X-ray Parameters. Transient X-ray absorption measurements were performed at the ultrafast between the transient spectrum at t > 1 ps and the expected high-spin/ low-spin differential absorption-field splitting of the Fe-3d orbitals. However, transient K-edge spectroscopy near the X-ray ...

X-ray photoemission and x-ray photoabsorption were used to study the composition and the electronic structure of ytterbium doped strontium fluoroapatite (Yb:S-FAP). High resolution photoemission measurements on the valence band electronic structure was used to evaluate the density of occupied states of this fluoroapatite. Element specific density of unoccupied electronic states in Yb:S-FAP were ...

Along with X{sup (3)}, the magnitude of the optical absorption in the transparent window below the principal absorption edge is an important parameter which will ultimately determine the utility of conjugated polymers in active integrated optical devices. With an absorptance sensitivity of < 10{sup {minus}5}, ...

The charge state and local ordering of Mn doped into a pulsed laser deposited single-phase thin film of ZnO are investigated by using x-ray absorption spectroscopy at the O K-edge, Mn K-edge�and L-edge, and x-ray emission spectroscopy at the O ...

The nature of the surface formed by a saturated layer ({Theta}(NO) = 1.0) of NO on a Mo(100) surface at 150 K has been determined by using both angle-resolved ultraviolet photoelectron spectroscopy and the angular variation of near-edge x-ray absorption fine structure (NEXAFS). Photoelectron spectroscopy indicates ...

The particle size effect on the formation of palladium hydride and on surface hydrogen adsorption was studied at room temperature using in situ X-ray absorption spectroscopy at the Pd K and L{sub 3} edges. Hydride formation was indirectly observed by lattice expansion in Pd K edge XANES spectra and by EXAFS ...

Arsenic is present in low concentrations in much of the Earth's crust and changes in its speciation are vital to understanding its transport and toxicity in the environment. We have used X-ray absorption spectroscopy to investigate the coordination sites of arsenic in a wide variety of samples, including soil and earthworm tissues from ...

Arsenic is present in low concentrations in much of the Earth's crust and changes in its speciation are vital to understanding its transport and toxicity in the environment. We have used X-ray absorption spectroscopy to investigate the coordination sites of arsenic in a wide variety of samples, including soil and earthworm tissues from arsenic-contaminated ...

Time-resolved x-ray spectroscopy at the Si L edges is used to probe the electronic structure of an amorphous Si foil as it melts following absorption of an ultrafast laser pulse. Picosecond temporal resolution allows observation of the transient liquid phase before vaporization and before the liquid breaks up into droplets. The melting ...

Time-resolved x-ray spectroscopy at the Si L edges is used to probe the electronic structure of an amorphous Si foil as it melts following absorption of an ultrafast laser pulse. Picosecond temporal resolution allows observation of the transient liquid phase before vaporization and before the liquid breaks up into droplets. The melting ...

analysis method for extended x-ray absorption fine structure spectroscopy suitable for use with compounds generality and precision are demonstrated in analyses made on two model nanoscale samples: 1 a Ir as the broader utility of the new x-ray absorption spectroscopy based protocol used to characterize them. DOI: ...

Anomalous wide-angle X-ray scattering and a controlled atmosphere cell for collection of data on supported Pt-Mo bimetallic clusters are described. The dispersion corrections to the atomic scattering factors were evaluated by X-ray absorption spectroscopy for Pt and Mo near the Pt L/sub III/ and Mo K absorption ...

We investigated different AlN nano-systems using spectroscopic methods. Experiments were performed at the Synchrotron Radiation Facility of the Laboratori Nazionali di Frascati using both XANES (x-ray absorption near edge spectroscopy) and FTIR (Fourier transform infrared spectroscopy) techniques in order to ...

... Title : ULTRASONIC ABSORPTION SPECTROSCOPY IN FLUIDS BY OPTICAL DETECTION OF PHOTOACOUSTIC PULSE PROFILES. ...

TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY VERIFICATION ANALYSIS FOR USE IN THE COMBUSTION OPTIMIZATION AND ...

... Accession Number : AD0422032. Title : THE USE OF INFRARED ABSORPTION SPECTROSCOPY IN RESEARCH ON HAFNIA AND ZIRCONIA. ...

... Accession Number : AD0606049. Title : ATOMIC ABSORPTION SPECTROSCOPY. Descriptive Note : Final rept. Corporate ...

... Accession Number : ADD752978. Title : AEROSOL ABSORPTION SPECTROSCOPY. Descriptive Note : CONFERENCE PAPER. ...

... Title : A STUDY OF OPTICAL ABSORPTION SPECTROSCOPY FROM METASTABLE EXCITED STATES OF TRANSITION METALS IONS IN ...

X-ray absorption spectroscopy (XAS) is a useful tool for obtaining structural and chemical information about the active sites of metalloproteins and metalloenzymes. Information may be obtained from both the edge region and the extended X-ray absorption fine structure (EXAFS) or post-edge region ...

We present XANES at the L(sub III) edge for four plutonium solid phases: Pu(III)F(sub 3), Pu(IV)O(sub 2), NaPu(V)O(sub 2)CO(sub 3), and Ba(sub 3)Pu(VI)O(sub 6). These correspond to the four important oxidation states in the process chemistry and environme...

Lead phosphate glasses are characteristically prone to aqueous attack but become chemically resistant by the addition of iron. The authors have measured the K-edge EXAFS of Fe and the L(sub 3)-edge EXAFS of Pb and find the atomic environments of the two s...

Ligand K-edge X-ray absorption spectroscopy (XAS) has been developed as a technique for the investigation of ligand-metal bonding and has been applied to the study of electronic structure in organic model complexes and metalloprotein active sites. Ligand ...

... Title : SHIFT OF THE EDGE OF SELF-ABSORPTION IN AN ELECTRIC FIELD OF CdTe SINGLE CRYSTALS AND FILMS,. ...

... Accession Number : AD0261240. Title : OPTICAL TRANSITIONS NEAR THE ABSORPTION EDGE IN CDS. I. - BAND STRUCTURE IN CDS. ...

... Accession Number : AD0624534. Title : ABSORPTION EDGE SPECTRUM OF SCANDIUM OXIDE,. Corporate Author : AEROSPACE ...

... ionized air vs. photon energy. The absorption edge is at the energy of the K absorption edge of nitrogen. effective mass ...

Orientation and charge transfer upon adsorption of thioethanol on copper surface at room temperature has been studied by near edge x-ray absorption fine structure (NEXAFS) and x-ray photoelectron spectroscopy (XPS) techniques. It is found that thioethanol adsorbs dissociatively on the Cu(111) surface. Polarization dependent S ...

Soft X-ray absorption spectroscopy (XAS), using fluorescence yield, was used to study the boron K near edge in MgB2 superconductor. The sample consists of MgB2 crystallites randomly oriented in a magnesium matrix. Abrasion of the sample surface in vacuum provides a surface relatively free of boron-containing impurities. The intrinsic ...

We have investigated the electronic structure of GaInN semiconductors by performing x-ray absorption near-edge fine structure (XANES) spectroscopy at Ga K-edge and self-consistent-field real-space multiple-scattering theory calculations. It was demonstrated that the nondestructive Ga K-edge ...

The x-ray absorption near-edge structure (XANES) spectroscopy has been used as a ``fingerprint'' to address the unresolved issues related to the changes in the local structure around As and to identify its chemical state in the As-doped, p-type ZnO. The spectral features of both As K- and O K-edge XANES spectra ...

Direct comparisons between surface and bulk of diverse materials can be made by simultaneous electron yield (5 nm depth sensitivity) and fluorescence yield (200 nm) ultra soft x-ray absorption spectroscopy measurements utilizing a rapid sample interchange apparatus. For example the orientations of functional groups have been characterized at and near the ...

Direct comparisons between surface and bulk of diverse materials can be made by simultaneous electron yield (5 nm depth sensitivity) and fluorescence yield (200 nm) ultra soft x-ray absorption spectroscopy measurements utilizing a rapid sample interchange apparatus. For example the orientations of functional groups have been characterized at and near the ...

The reaction of bovine serum albumin (BSA) with [ trans-RuCl 4(Im)(dimethylsulfoxide)][ImH] (Im = imidazole) (NAMI-A), an experimental ruthenium(III) anticancer drug, and the formation of the respective NAMI-A/BSA adduct were investigated by X-ray absorption spectroscopy (XAS) at the sulfur and chlorine K-edges and at the ruthenium K- ...

Time-resolved x-ray absorption spectroscopy has been used to observe the transient species generated by one-photon detachment of an electron from aqueous bromide. The K-edge spectrum of the short-lived Br0 atom exhibits a resonant 1s-4p transition that is absent for the Br- precursor. The strong 1s-4p resonance suggests that there is ...

We demonstrate the feasibility of near edge x-ray absorption fine structure spectroscopy on solids by means of femtosecond soft x-ray pulses from a free-electron laser (FEL). Our experiments, carried out at the FEL at Hamburg used a special sample geometry, spectrographic energy dispersion, single shot position-sensitive detection, and ...

An analysis of experimental data from low-temperature selective spectroscopy and single J-aggregate spectroscopy reveals a hierarchy of exciton states within the confines of the absorption band of J-aggregates which are formed by relaxation of an excited state. For J-aggregates, which are characterized by substantial static disorder, ...

The local structure of boron-doped highly oriented graphite films was determined via soft x-ray emission and absorption spectroscopy using synchrotron radiation. Analysis of the BK and CK x-ray emission spectra using the discrete variational-X? molecular orbital method clarified that boron atoms are chemisorbed onto graphite by substituting for carbon ...

Smalt was commonly used as a pigment by artists between the 16th and 18th centuries. It is a powdered blue potash glass colored by cobalt ions and often degrades causing dramatic changes in the appearance of paintings. The aim of the work presented in this paper was to investigate the changes in the structure and environment around the cobalt ion on deterioration, to further our understanding of ...

The inner shell excitation of pyrimidine and some halogenated pyrimidines near the C and N K-edges has been investigated experimentally by near edge x-ray absorption fine structure spectroscopy and theoretically by density functional theory calculations. The selected targets, 5-Br-pyrimidine, 2-Br-pyrimidine, ...

This work reports a theoretical x-ray absorption near-edge structure (XANES) spectroscopy study at the Mn K-edge in several Mn3MC (M = Sn, Zn and Ga) compounds. Comparison of the experimental Mn K-edge XANES spectra and theoretical computations based on multiple scattering theory shows that ...

Fe-K-edge X-ray absorption spectroscopy (XAS) has been used to investigate the electronic and geometric structure of the iron active site in non-heme iron enzymes. A new theoretical extended X-ray absorption fine structure (EXAFS) analysis approach, called GNXAS, has been tested on data for iron model complexes to ...

The bonding of hexanethiols to gold nanoparticles of 1.5, 2.0, and 3 nm was studied using x-ray absorption near-edge spectroscopy (XANES) and extended x-ray absorption fine structure (EXAFS). The XANES spectra revealed that a substantial fraction of weakly bound hexanethiol molecules are present in addition to ...

The bonding of hexanethiols to gold nanoparticles of 1.5, 2.0, and 3nm was studied using x-ray absorption near-edge spectroscopy (XANES) and extended x-ray absorption fine structure (EXAFS). The XANES spectra revealed that a substantial fraction of weakly bound hexanethiol molecules are present in addition to ...

The electronic structure of copper hexadecafluorophthalocyanine (F16CuPc) has been measured using soft x-ray emission spectroscopy and x-ray absorption spectroscopy at the C, N, and FK edges. Our element- and orbital-specific measurements confirm that substitution of hydrogen for fluorine leads to profound ...

The identification of ligands in metalloorganic complexes is crucial for understanding many important biological and chemical systems. Nonresonant K? valence-to-core X-ray emission spectroscopy (XES) has been demonstrated as a ligand identification technique which is complementary to other spectroscopies, such as X-ray absorption. In ...

We study carrier dynamics in CdSe colloidal quantum dots (QDs) using femtosecond photoluminescence and transient absorption spectroscopies. We resolve hole relaxation between the high- and low-energy fine-structure states that are responsible for the band-edge absorption and emission, respectively. We derive a ...

The dinuclear iron center of the hydroxylase component of soluble methane monooxygenase (MMO) from Methylococcus capsulatus and Methylosinus trichosporiwn has been studied by X-ray absorption spectroscopy. Analysis of the Fe K-edge EXAFS revealed that the...

The local structure around the constitutive atoms of Hg-Rb liquid alloys has been studied for concentrations of Rb higher than 35 at. % by means of x-ray absorption spectroscopy at Rb and Hg edges. The spectra evolution is interpreted as due to the formation of stable Hgn units also present in solid Hg-alkali crystalline compounds.