Characterization of Charge States of Energetic Ions in Solids from AssociatedKX-Ray Production

1974 ◽  
Vol 33 (13) ◽  
pp. 733-736 ◽  
Author(s):  
Sheldon Datz ◽  
B. R. Appleton ◽  
J. R. Mowat ◽  
Roman Laubert ◽  
R. S. Peterson ◽  
...  
Keyword(s):  
Energetic Ions ◽  
Charge States

The Application of 57FE Mössbauer Spectroscopy to the Characterization of Nuclear Waste Forms

1981 ◽  
Vol 6 ◽  
Author(s):  
Paul G. Huray ◽  
M. T. Spaar ◽  
S. E. Nave ◽  
J. M. Legan ◽  
L. A. Boatner ◽  
...  
Keyword(s):  
Nuclear Waste ◽  
Chemical Properties ◽  
Electronic Charge ◽  
Chemical Information ◽  
Waste Forms ◽  
Charge States ◽  
Physical And Chemical ◽  
Nuclear Waste Forms

The electronic charge states and site symmetries of the radioactive ions incorporated in nuclear waste forms are of considerable importance in determining the physical and chemical properties of these materials. An in situ characterization of these ions is, unfortunately, often difficult – especially when a mixture of charge states and local crystal symmetries exist. The application of Mbssbauer spectroscopy represents a powerful technique for obtaining solid state chemical information.

Formation and characterization of charge coupled structure of polyoxometalate particles and a GaAs-based nanowire for readout of molecular charge states

2019 ◽  
Vol 58 (SD) ◽  
pp. SDDE13
Author(s):  
Kentaro Sasaki ◽  
Shoma Okamoto ◽  
Shohei Tashiro ◽  
Tetsuya Asai ◽  
Seiya Kasai
Keyword(s):  
Molecular Charge ◽  
Charge States

scholarly journals An Easily Synthesized Covalent Nanocage that Hosts Fullerenes in Multiple Charge States and Selectively Binds C70

2021 ◽  
Author(s):  
Daniel A. Rothschild ◽  
Aaron Tran ◽  
William P. Kopcha ◽  
Jianyuan Zhang ◽  
Mark C. Lipke
Keyword(s):  
Positive Charge ◽  
Association Constants ◽  
Redox Properties ◽  
Nmr Studies ◽  
Polar Solvents ◽  
Fullerene Derivatives ◽  
Practical Utility ◽  
Charge States ◽  
Multiple Charge

Discrete nanocages provide a way to solubilize, separate, and tune the properties of molecular guests, including fullerenes and other aromatics. However, few such nanocages can be synthesized efficiently from inexpensive starting materials, limiting their practical utility. To address this limitation, we developed a new pyridinium-linked cofacial porphyrin nanocage (Cage4+) that can be prepared efficiently on a gram scale. NMR studies in CD3CN reveal that Cage4+ binds C60 and C70 with association constants >108 M-1 and complete selectivity for extracting C70 from mixtures of both fullerenes. The solubility of Cage4+ in polar solvents enabled electrochemical characterization of the host-guest complexes C60@Cage4+ and C70@Cage4+, finding that the redox properties of the encapsulated fullerenes are minimally affected despite the positive charge of the host. Complexes of the −1 and −2 charge states of the fullerenes bound in Cage4+ were subsequently characterized by UV-vis-NIR and NMR spectroscopies. The relatively easy preparation of Cage4+ and its ability to bind fullerenes without substantially affecting their redox properties suggests that C60@Cage4+ and C70@Cage4+ may be directly useful as solubilized fullerene derivatives.

Luminescence and EPR Characterization of Vanadium Doped Semi-Insulating 4H SiC

2006 ◽  
Vol 527-529 ◽  
pp. 651-654 ◽  
Author(s):  
Ekaterina N. Kalabukhova ◽  
D.V. Savchenko ◽  
Siegmund Greulich-Weber ◽  
M.F. Bulanyi ◽  
S.A. Omelchenko ◽  
...  
Keyword(s):  
Fermi Level ◽  
Band Gap ◽  
The Other ◽  
Epr Spectrum ◽  
Mixed Conductivity ◽  
Pl Spectrum ◽  
Charge States

In this paper, we report on a photoluminescence (PL) and EPR study of several semiinsulating (SI) 4H SiC samples showing the different compensation regimes due to the presence of V4+ and V3+of different concentration. The samples which contain only V3+ indicates the compensation regime NV≅ND-NA>0 with the Fermi level located in the upper half of the band gap. The presence of V4+ along with V3+ in the other two set of samples indicates the SI behavior of the samples with compensation regime NV>NA-ND>0. Considering that the samples revealed EPR spectrum of vanadium V3+, position of the Fermi level should be also in the upper half of the band gap and mixed conductivity could be expected. UD-3 PL spectrum was observed in vanadium doped SI 4H SiC presented in the samples in V3+/V4+ and V4+/V5+ charge states with compensation regime NV>NA-ND>0. The data obtained prove that the PL and EPR are suitable techniques in determination SI yield in SiC crystal.

scholarly journals Determining the charge states of solar energetic ions during large geomagnetic storms

1993 ◽  
Vol 13 (9) ◽  
pp. 367-370 ◽  
Author(s):  
J.H. Adams Jr ◽  
R. Beaujean ◽  
P.R. Boberg ◽  
N.L. Grigorov ◽  
M.A. Kondratyeva ◽  
...  
Keyword(s):  
Geomagnetic Storms ◽  
Energetic Ions ◽  
Charge States
Sign in / Sign up

Export Citation Format

Share Document