Theoretical Wavelengths and Transition Rates for the Iron Ions Fe IX to Fe XIV in the Soft X-Ray Region

2000 ◽  
Vol 61 (4) ◽  
pp. 452-458 ◽  
Author(s):  
P Quinet
Keyword(s):  
Transition Rates ◽  
Iron Ions ◽  
X Ray

Non-uniform distribution of dopant iron ions in TiO2 nanocrystals probed by X-ray diffraction, Raman scattering, photoluminescence and photocatalysis

2015 ◽  
Vol 3 (8) ◽  
pp. 1846-1853 ◽  
Author(s):  
S. Manu ◽  
M. Abdul Khadar
Keyword(s):  
Raman Scattering ◽  
Uniform Distribution ◽  
Semiconductor Nanocrystals ◽  
Iron Ions ◽  
X Ray Diffraction ◽  
Tio2 Nanocrystals ◽  
X Ray ◽  
Practical Applications ◽  
Mechanism Operative

The phenomenon of ‘self-purification’ is a real mechanism operative in nanocrystals and this should be taken into account while doping semiconductor nanocrystals with external impurities for practical applications.

Evidence of Variations in Atomic Distribution in Disordered Mixed Metal Hydroxides

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1843-1850
Author(s):  
Wen Rong ◽  
Sarah Stepan ◽  
Rodney D. L. Smith
Keyword(s):  
Transition Metal Oxides ◽  
Iron Ions ◽  
X Ray Diffraction ◽  
Metal Hydroxides ◽  
X Ray ◽  
Mixed Metal ◽  
Apparent Solubility ◽  
Fundamental Understanding ◽  
Double Hydroxides ◽  
Mixed Metal Hydroxides

ABSTRACTNumerous fabrication protocols are known to yield transition metal oxides with structures related to layered double hydroxides, but the effect of fabrication protocol on the uniformity of mixed-metal compositions remain largely unexplored. We have analysed the apparent solubility limits and the structural implications of iron ions in nickel hydroxide lattices for materials prepared by four different fabrication protocols. Opposing shifts in the (100) and (001) reflection in powder X-ray diffraction results revealed a contraction of the nickel lattice upon successful incorporation of iron, with Ni-M distances exhibiting an apparently linear decrease with respect to iron content. This feature revealed the amount of iron incorporated into nickel-based materials to be dependent on fabrication protocol, varying from apparently negligible concentrations to over fifty atomic percent. The dependency of structure on fabrication protocols provides a handle to improve fundamental understanding of catalytically relevant coordination environments.

Wettability and Nanotribological Response of Silicon Surfaces Functionalized by Ion Implantation

2012 ◽  
Vol 730-732 ◽  
pp. 257-262
Author(s):  
Bruno Nunes ◽  
Sergio Magalhães ◽  
Nuno Franco ◽  
Eduardo Alves ◽  
Ana Paula Serro ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ion Implantation ◽  
Silicon Surfaces ◽  
Iron Ions ◽  
X Ray Diffraction ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Scanning Electron

Aiming to improve the nanotribological response of Si-based materials we implanted silicon wafers with different fluences of iron ions (up to 2x1017 cm-2). Implantation was followed by annealing treatments at temperatures from 550°C to 1000°C. The implanted surfaces were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), atomic force microscopy (AFM) and wettability tests. Then, samples were submitted to AFM-based nanowear tests. We observe an increase of both hidrophobicity and and wear resistance of the implanted silicon, indicating that ion implantation of Si can be a route to be deeper explored in what concerns tribomechanical improvement of Si.

Vibrations and chemical states of iron ions in soda-lime glasses determined by element-specific X-ray analyses

2018 ◽  
Vol 47 (5) ◽  
pp. 359-371 ◽  
Author(s):  
Kyoko Okada ◽  
Yukihito Nagashima ◽  
Koichi Shiraki ◽  
Hiroki Kageyama ◽  
Hironori Ofuchi ◽  
...  
Keyword(s):  
Soda Lime ◽  
Iron Ions ◽  
X Ray ◽  
Chemical States

scholarly journals Multiconfiguration Dirac–Fock wavelengths and transition rates in the X-ray spectra of highly charged Ga-like ions from Yb39+ to U61+

2007 ◽  
Vol 93 (1) ◽  
pp. 167-182 ◽  
Author(s):  
Pascal Quinet ◽  
Émile Biémont ◽  
Patrick Palmeri ◽  
Elmar Träbert
Keyword(s):  
Transition Rates ◽  
X Ray

Valence states of iron ions in nanostructured yttrium iron garnet Y3Fe5O12 studied by means of soft X-ray absorption spectroscopy

2012 ◽  
Vol 185 (12) ◽  
pp. 598-601 ◽  
Author(s):  
V.V. Mesilov ◽  
V.R. Galakhov ◽  
B.A. Gizhevskii ◽  
N.I. Lobachevskaya ◽  
M. Raekers ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Yttrium Iron Garnet ◽  
Iron Ions ◽  
Yttrium Iron ◽  
X Ray ◽  
Valence States ◽  
Iron Garnet ◽  
X Ray Absorption

Characterization of Cellulosic Biomass Loaded with Iron and Arsenic Using High Energy X-Rays

2007 ◽  
Vol 20-21 ◽  
pp. 643-646 ◽  
Author(s):  
G. Cordeiro Silva ◽  
Regina Pinto de Carvalho ◽  
M. Sylvia S. Dantas ◽  
Virgínia S.T. Ciminelli
Keyword(s):  
Fine Structure ◽  
Arsenic Species ◽  
High Energy ◽  
Cellulosic Biomass ◽  
X Rays ◽  
Iron Ions ◽  
X Ray ◽  
X Ray Absorption ◽  
Exafs Spectra

The biosorption of arsenic species by dried lettuce leaves (L.sativa) was investigated. Arsenic sorption, that is not effective on in natura biomass, was enhanced when the biomass was previously loaded with Fe(III). Analysis of X-ray Absorption Near-Edge Spectroscopy (XANES) spectra showed that iron was incorporated as Fe(III) and arsenic as As(V), regardless the contact with the lowest or highest valence species of these elements. The features of Extended X-ray Absorption Fine-Structure Spectroscopy (EXAFS) spectra suggest that the nearest neighboring atoms of iron ions are the same in all the samples, even in the As-Fe loaded ones. These results indicate the arsenic oxyanions as the sorbed species on the iron-loaded biomass.

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