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A promising high-sensitive 1D photonic crystal magnetic field sensor based on the coupling of Fano\Tamm resonance in far IR region.
Sci Rep
January 2025
Physics Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62512, Egypt.
This paper presents a novel investigation of a magnetic sensor that employs Fano/Tamm resonance within the photonic band gap of a one-dimensional crystal structure. The design incorporates a thin layer of gold (Au) alongside a periodic arrangement of Tantalum pentoxide ([Formula: see text]) and Cesium iodide ([Formula: see text]) in the configuration [Formula: see text]. We utilized the transfer matrix method in conjunction with the Drude model to analyze the formation of Fano/Tamm states and the permittivity of the metallic layer, respectively.
View Article and Find Full Text PDFUnraveling the Origin of Unusual Cs Atom Disorder in Cesium Octahedral Molybdenum Halide Cluster Compounds, Cs[{MoX}X] (X = Cl and Br).
Inorg Chem
January 2025
NIMS-CNRS-Saint-Gobain International Collaboration Center, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
In this study, we investigate structural disorder and its implications in metal cluster (MC)-based compounds, specifically focusing on Cs[{MoX}X] (X = Cl and Br). Utilizing synchrotron radiation X-ray diffraction, Fourier transform infrared spectroscopy, and luminescence measurements, we examined the incorporation of water molecules into these compounds and their effects on the crystal structure and optical properties. Our findings reveal that the presence of water molecules induces the lattice disorder, particularly the displacement of Cs atoms.
View Article and Find Full Text PDFFacile and Regioselective Deuteration of C2-Alkylated Imidazolium Salts in the Presence of Cesium Carbonate.
Chemistry
December 2024
Laboratory of Catalysis, MolSys Research Unit, Université de Liège, Institut de Chimie Organique (B6a), Allée du six Août 13, 4000, Liège, Belgium.
Thirteen imidazolium iodides bearing benzyl, mesityl, or 2,6-diisopropylphenyl substituents on their nitrogen atoms, and C-C alkyl chains on their C2 carbon atom were readily deuterated with DO as a cheap and non-toxic deuterium source in the presence of CsCO, a weak, innocuous, inorganic base. The isotopic exchange proceeded quickly and efficiently under mild, aerobic conditions to afford a range of aNHC and NHO precursors regioselectively labeled on their C2α exocyclic position and/or C4=C5 heterocyclic backbone. A "carbene-free" mechanism was postulated, in which the carbonate anion acts as a catalyst to activate an exocyclic, acidic C-H bond and ease a deuterium transfer from DO to the imidazolium salt in a concerted fashion.
View Article and Find Full Text PDFTrapping Properties of Iodine, Cesium, and Tellurium in Uranium Dioxide: A DFT+ Study.
Inorg Chem
December 2024
Canadian Nuclear Laboratories, Chalk River Laboratories, Chalk River, ON K0J1J0, Canada.
We investigate the trapping properties of iodine, cesium, and tellurium in uranium dioxide, using the Hubbard-corrected density functional theory (DFT+). In order to avoid the metastable states inherent to this method, we use the occupation matrix control (OMC) scheme, which also allows us to monitor the oxidation states of the different species. The most favorable trapping sites, oxidation states, and solubility of I, Cs, and Te are evaluated in stoichiometric UO.
View Article and Find Full Text PDFSpecies-specific trends of plutonium, radiocesium, and potassium-40 levels in three fish species of the Yenisei river (Siberia, Russia).
J Environ Radioact
December 2024
All-Russian Research Institute for Silviculture and Mechanization of Forestry, 15 Institutskaya str., Pushkino, 141202, Russia.
Article Synopsis
- * Results indicate no increase in plutonium levels in fish after major discharges from 2018-2020, but grayling had significantly higher Pu concentrations due to their diet of benthic invertebrates, while larger pike showed increasing Pu levels.
- * High concentrations of radiocesium and potassium were found in pike, attributed to biomagnification, leading to potential ecological risk assessments and a foundation for future research on radionuclides in freshwater ecosystems.
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