Results 21 to 30 of about 6,035 (144)

Local structure of amorphous and crystalline Ge2Sb2Te5 films

Physics of Complex Systems, 2021
An effective way to examine structural rearrangement in solids is Mössbauer spectroscopy. A key requirement to Mössbauer probes used for these purposes is the possibility of their localization in a certain site of the crystal lattice or in the structural
Юрий Александрович Петрушин, Алла Валентиновна Марченко, Павел Павлович Серегин   +2 more
doaj   +1 more source

Modulating Local Coordination in Single‐Atom Catalysts: From Fundamental Concepts to Emerging Breakthroughs in Electrocatalysis

Angewandte Chemie, EarlyView.
This review summarizes atomic‐level design strategies for single‐atom catalysts, emphasizing modulation of the local coordination environment, active‐site geometry, and metal‐support interactions to optimize catalytic activity and stability in electrocatalytic energy conversion applications.
Ashwani Kumar, Harun Tüysüz
wiley   +2 more sources

Polarization Analysis in Mössbauer Reflectometry with Synchrotron Mössbauer Source

Condensed Matter, 2019
Polarization selection of the reflected radiation has been employed in Mössbauer reflectivity measurements with a synchrotron Mössbauer source (SMS).
Marina Andreeva, Roman Baulin, Aleksandr Chumakov, Tatiyana Kiseleva, Rudolf Rüffer   +4 more
doaj   +1 more source

Coupled Fe3O4‐Cluster Precipitates and Single Fe‐Atom Catalysts Can Boost Oxygen Reduction via Concomitantly Accelerated Water Dissociation

Angewandte Chemie, EarlyView.
Fe3O4 clusters can be precipitated onto Fe–N–C SACs through a residual‐oxygen‐assisted precipitation approach. Compelling evidence, including operando spectroscopy and ab initio calculations, suggests that Fe3O4‐cluster precipitates not only induce asymmetric electronic structures of Fe‐N4 active center to optimize the OH* adsorption, but also ...
Cheng‐Kai Du, Xiongyi Liang, Fei‐Xiang Ma, Yutong Li, Zheng‐Qi Liu, Long Ma, Zeng Li, Liang Zhen, Yan Huang, Xiao Cheng Zeng, Cheng‐Yan Xu   +10 more
wiley   +2 more sources

Constraining the origins of the magnetism of lepidocrocite (γ-FeOOH): a Mössbauer and magnetisation study

Frontiers in Earth Science, 2016
Lepidocrocite, a widespread environmentally relevant iron oxyhydroxide, has been investigated for decades using 57Fe Mössbauer spectroscopy and magnetic measurements.
Yohan eGuyodo, Pierre eBonville, Jessica L Till, Jessica L Till, Georges eOna-Nguema, France eLagroix, Nicolas eMenguy   +6 more
doaj   +1 more source

Tailoring High‐Valent Iron‐Oxo Species Redox via Extended π‐Fe3d–O2p Orbital Overlapping Toward Chemical‐Efficient Water Purification

Angewandte Chemie, EarlyView.
We address the long‐standing challenge of reactivity–selectivity trade‐off by precisely tuning the redox properties of Fe(IV), rather than simply accelerating its formation, to enable chemically efficient and low‐emission water treatment. ABSTRACT High‐valent iron oxo species (Fe(IV)) are attractive for wastewater treatment because of their high ...
Hongyu Zhou, Junwen Chen, Jiuyi Wang, Xinhao Wang, Qiming Zhang, Shiying Ren, Xuning Li, Li Gao, Shaobin Wang, Xiaoguang Duan   +9 more
wiley   +2 more sources

Espectroscopia Móssbauer

Revista de Ciencias, 1989
En los núcleos, como en los átomos, existen niveles de energía y cuando el núcleo pasa de un estado a otro de más baja energía ocurre la emisión de rayos y.
Germán A. Pérez
doaj   +1 more source

Identification of iron-bearing minerals in basalts and pillow lavas of the Kaczawa Mountains using 57Fe Mössbauer spectroscopy

Nukleonika, 2017
The Kaczawa Mountains along with the Kaczawa foothill comprise a complicated geological unit that is called the Kaczawa metamorphic (Sudetes, SW Poland). The aim of our work was to identify the iron-bearing minerals in samples of basalts and pillow lavas
Malczewski Dariusz, Jeleń Martyna, Żaba Jerzy, Błachowski Artur, Ruebenbauer Krzysztof, Dziurowicz Maria   +5 more
doaj   +1 more source

Recent Advances in Ferrite‐Based Materials for Biomedical Applications: A Comprehensive Review

Advanced Materials, EarlyView.
Ferrite nanoplatforms are presented as tunable biomedical materials in which synthesis control, cation engineering, defect/morphology regulation, and surface functionalization govern structure–property–bioactivity relationships. These design strategies enable multifunctional applications including MRI contrast, magnetic hyperthermia, targeted drug ...
Pramod D. Mhase, Varsha C. Pujari, Akash V. Fulari, Sunil M. Patange, Sean Li, Danyang Wang, Sagar E. Shirsath   +6 more
wiley   +1 more source

Observation of nuclear gamma resonance with superconducting tunnel junction detectors

AIP Advances, 2016
Nb-based superconducting tunnel junction detectors have been used for the registration of electrons following a nuclear gamma resonance (Mössbauer effect).
M. G. Kozin, I. L. Romashkina, L. V. Filippenko, V. P. Koshelets   +3 more
doaj   +1 more source