Results 81 to 90 of about 41,619 (168)

Mössbauer spectroscopy of sulphidic minerals [PDF]

Acta Montanistica Slovaca, 2000
Principles of the Mössbauer effect and the possibilities of its utilization for the study of sulphidic minerals are discussed. There is possibility to apply the Mössbauer spectroscopy in mineralogy for the identification of sulphides („fingerprint ...
Lipka Jozef, BalហPeter
doaj  

Magnetic Properties of Ferritin at Different Levels of Degradation: Implications for MRI‐Based Iron Quantification in the Brain

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Ferritin's iron core exhibits complex magnetic properties, as suggested by magnetometry and Mössbauer spectroscopy, which remain incompletely understood. In particular, the antiferromagnetic inner core could influence the accuracy of iron quantification using MRI and raise concerns about postmortem validation studies involving degraded
Stefan Ropele, Sowmya Sunkara, Snježana Radulović, Saška Lipovšek, Michael Stöger‐Pollach, Christoph Birkl, Walter Gössler, Christian Enzinger, Gerd Leitinger   +8 more
wiley   +1 more source

Facilitating Sodium‐Ion Diffusion in Fe‐Doped Co3O4 for High‐Rate Performance

Small, EarlyView.
The limited rate performance of cobalt oxide (Co3O4) materials restricts their applicability in the rapid charge–discharge process of sodium‐ion batteries (SIBs). Iron (Fe) lattice doping can facilitate sodium‐ion diffusion by narrowing the bandgap and modulating the Co─O bond length.
Yonghuan Fu, Guowei Sun, Rene Lucka, Qijun Song, Franz Renz, Huaping Zhao, Zhijie Wang, Yong Lei   +7 more
wiley   +1 more source

Breaking the ORR Trade‐Off via Mg‐Steered Fe‐N4 Pyridinic Conversion

Small, EarlyView.
A Mg‐assisted sacrificial templating strategy is developed to selectively regulate the coordination environment of Fe–N4 sites. This approach induces an active site conversion from S1 to S2, enabling enhancement of oxygen reduction activity and durability. ABSTRACT Single‐atom Fe sites coordinated by pyrrolic nitrogen (Fe‐Npyrr‐C) are highly active for
Si‐Qi Sun, Ya‐Peng Cheng, Hai‐Ning Zhang, Jia‐Min Lyu, Xiao‐Yun Li, Ke Lyu, Ming‐Hui Sun, Shen Yu, Wen‐Mao Tu, Andreu Cabot, Li‐Hua Chen   +10 more
wiley   +1 more source

Estudio Minerológico de Suelos Agrícolas por Espectroscopia Mössbauer

Revista de Investigación de Física, 1999
Los compuestos de hierro (Fe) son muy comunes en la naturaleza. En el caso de suelos, se presenta en forma de sesquióxidos de hierro, tales como óxidos, hidróxidos y oxihidróxidos, así como cationes de sustitución en arcillas.
María L. Cerón L., Julio Fabián S., Jorge A. Bravo Cabrejos   +2 more
doaj   +1 more source

A Second-Generation Janus Scorpionate Ligand: Controlling Coordination Modes in Iron(II) Complexes by Steric Modulation [PDF]

, 2008
The second-generation Janus scorpionate ligand [HB(mtdaMe)3−] containing methyl-mercaptothiadiazolyl (mtdaMe) heterocyclic rings and (N,N,N-) and (S,S,S-) binding pockets has been prepared. The effect of methyl substitution versus the unsubstituted first-
Gardinier, James R., Grandjean, Fernande, Gwengo, Chengeto, Lindeman, Sergey V., Long, Gary J., Silva, Rosalice M., Smith, Mark D.   +6 more
core   +1 more source

1D and 3D Carbon Nanomaterials Derived from Zeolite‐Based Catalysts: Synthesis and Applications

Small Structures, EarlyView.
Zeolites act as catalysts or catalytic templates to synthesize 1D and 3D carbon nanomaterials with uniform structures, enabled by their high surface area and uniform porous frameworks. The resulting carbon nanomaterials possess excellent surface area and electronic conductivity, supporting their use in energy storage, catalysis, electronics, gas ...
Kulika Pithaksinsakul, Peeranat Chaipornchalerm, Sareeya Bureekaew, Chularat Wattanakit   +3 more
wiley   +1 more source

Synthesis, Structure, and Eu3+‐Activated Photoluminescence of the Mixed‐Anion Carbodiimide NaLa2F3(CN2)2

Zeitschrift für anorganische und allgemeine Chemie, EarlyView.
NaLa2F3(CN2)2 forms via solid‐state metathesis of LaF3 and Na2(CN2) at 550°C and remains stable under ambient air and humidity. The structure is based on [La(NCN)5F4] polyhedra with interstitial Na+; revealing an unconventional red emission when doped with Eu3+.
Albert T. Schwarz, Markus Ströbele, David Enseling, Thomas Jüstel, H.‐Jürgen Meyer   +4 more
wiley   +1 more source

Mössbauer forward scattering spectra of ferromagnets in radio-frequency magnetic field [PDF]

Ядерна фізика та енергетика, 2012
The transmission of Mössbauer radiation through a thick ferromagnetic crystal, subjected to the radio-frequency (rf) magnetic field, is studied. A quantum-mechanical dynamical scattering theory is developed, taking into account both the periodical ...
A. Ya. Dzyublik, E. K. Sadykov, G. I. Petrov, V. V. Arinin, F. H. Vagizov, V. Yu. Spivak   +5 more
doaj  

Crystal structure and magnetic properties of Li1-xNaxFePO4 based on Mössbauer spectroscopy

AIP Advances, 2017
The Na-doped Li1-xNaxFePO4 (x = 0.0, 0.01, 0.05, 0.1, 1) samples were synthesized by solid-state reaction method and investigated with X-ray diffractometer (XRD), vibrating sample magnetometer (VSM) and Mössbauer spectrometer.
Byung Ug Ko, Hyunkyung Choi, Taejoon Kouh, Sam Jin Kim, Chul Sung Kim   +4 more
doaj   +1 more source