1,315 results match your criteria: "Physical Institute[Affiliation]"
Inorg Chem
December 2024
Physical Institute, Karlsruhe Institut of Technology (KIT) Campus South, Wolfgang-Gaede-Str. 1, Karlsruhe 76131, Germany.
The dinuclear β-diketiminato complex [LClDy(μ-Cl)DyL(THF)] () (L = {2,6-PrCH-NC(Me)CHC(Me)N-2,6-PrCH}) was obtained by reaction of DyCl with KL in a molar ratio of 1:1 and used for the preparation of the mixed-ligand complex [LDy(μ-3,5-Cat)] () by salt metathesis reaction with 3,5-CatK (3,5-Cat -3,5-di--butyl-catecholate). Reactions of 3,5-CatNa with [LLnCl(THF)] (Ln = Dy, Y) ligated with the less bulky ligand L = {2,4,6-MeCH-NC(Me)CHC(Me)N-2,4,6-MeCH} afforded the mixed-ligand THF-containing complexes [LLn(μ-3,5-Cat)(THF)] (Ln = Dy (), Y ()). All new complexes were fully characterized, and the solid-state structures were determined by single-crystal X-ray diffraction.
View Article and Find Full Text PDFZh Vopr Neirokhir Im N N Burdenko
December 2024
Burdenko Neurosurgical Center, Moscow, Russia.
Unlabelled: The development of new drugs in nuclear medicine for diagnosis or treatment (chemotherapy) of brain tumors, in particular gliomas, is inextricably linked with the use of tumor models in animals (usually rats).
Objective: To compare the widely used glioma cell model C6 and the new experimental tissue model of glioblastoma 101.8.
Dalton Trans
December 2024
Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia.
In pursuit of identifying less toxic hybrid compounds suitable for optoelectronic applications, we synthesized a novel homopiperazinium bromoantimonate(III), (CHN){SbBr}. It readily crystallized from an aqueous hydrobromic acid solution and was found to be stable both in air and upon heating up to 175 °C. The crystal structure of the new bromoantimonate(III) consisted of {SbBr} zigzag chains, which were composed of strongly trigonally distorted SbBr octahedral anions and CHN dications.
View Article and Find Full Text PDFPhys Rev Lett
November 2024
Skolkovo Institute of Science and Technology, 121205, Moscow, Russia.
Direct numerical simulation of three-dimensional acoustic turbulence has been performed for both weak and strong regimes. Within the weak turbulence, we demonstrate the existence of the Zakharov-Sagdeev spectrum ∝k^{-3/2} not only for weak dispersion but in the nondispersion (ND) case as well. Such spectra in the k space are accompanied by jets in the form of narrow cones.
View Article and Find Full Text PDFNat Commun
December 2024
Physical Institute, University of Münster, Münster, 48149, Germany.
Biological neural networks effortlessly tackle complex computational problems and excel at predicting outcomes from noisy, incomplete data. Artificial neural networks (ANNs), inspired by these biological counterparts, have emerged as powerful tools for deciphering intricate data patterns and making predictions. However, conventional ANNs can be viewed as "point estimates" that do not capture the uncertainty of prediction, which is an inherently probabilistic process.
View Article and Find Full Text PDFWe analyzed spin polarization dynamics in a two-dimensional system of spin 1/2 charged particles with spin-orbit interaction in perpendicular magnetic field in the presence of external noise. It was shown that spin polarization reveals quantum oscillations, collapses, and revivals. The hierarchy of time scales corresponding to quantum oscillations, collapses, and revivals was identified and analyzed.
View Article and Find Full Text PDFNat Commun
November 2024
Université de Strasbourg, CNRS, IPCMS, Strasbourg, France.
The scanning tunneling microscope (STM) provides access to atomic-scale properties of a conductive sample. While single-molecule tip functionalization has become a standard procedure, fluorescent molecular probes remained absent from the available tool set. Here, the plasmonic tip of an STM is functionalized with a single fluorescent molecule and is scanned on a plasmonic substrate.
View Article and Find Full Text PDFDalton Trans
December 2024
Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russia.
δ-BiO-based materials have long been a focus of interest as potential solid oxide fuel cell materials due to their high electrical conductivity. Here, extensive studies of thermal stability, polymorphism and conductivity have been carried out for the first time on BiWO ( = La, Pr or Nd) compounds in the ternary BiO-O-WO system, mentioned more than 20 years ago by Watanabe. The obtained single-phase materials were found to be sufficiently dense (more than 94%) and thermally stable (up to 900 °C).
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
February 2025
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.
LiNbO crystal with a lithium composition gradient of Li/Nb = 0.8 wt%/cm (LiNbO) were obtained. A monotonic change in the edge of the UV absorption edge is observed when scanning the surface of the gradient crystal along the growth direction.
View Article and Find Full Text PDFNanoscale
November 2024
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 119991 Moscow, Russia.
The coherent spin dynamics of electrons and holes in CsPbI perovskite nanocrystals in a glass matrix are studied by the time-resolved Faraday ellipticity technique in magnetic fields up to 430 mT across a temperature range from 6 K to 120 K. The Landé -factors and spin dephasing times are evaluated from the observed Larmor precession of electron and hole spins. The nanocrystal size in the three studied samples varies from about 8 to 16 nm, resulting in exciton transition varying from 1.
View Article and Find Full Text PDFInt J Radiat Biol
November 2024
A.A. Logunov Institute for High Energy Physics of the National Research Centre "Kurchatov Institute", Protvino, Russia.
Nat Commun
October 2024
Solid State Physics Laboratory, ETH Zürich, 8093, Zürich, Switzerland.
Materials (Basel)
October 2024
Department of Physics, Voronezh State University, 394018 Voronezh, Russia.
This study addresses the challenge of modeling temperature-dependent photoluminescence (PL) in CdS colloidal quantum dots (QD), where PL properties fluctuate with temperature, complicating traditional modeling approaches. The objective is to develop a predictive model capable of accurately capturing these variations using Long Short-Term Memory (LSTM) networks, which are well suited for managing temporal dependencies in time-series data. The methodology involved training the LSTM model on experimental time-series data of PL intensity and temperature.
View Article and Find Full Text PDFPhys Rev Lett
October 2024
Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
Int J Mol Sci
October 2024
V.I. Kulakov National Medical Research Center for Obstetrics, Gynecology and Perinatology, Ministry of Healthcare of Russian Federation, 117997 Moscow, Russia.
Polycystic ovary syndrome (PCOS) is a complex disorder that impacts both the endocrine and metabolic systems, often resulting in infertility, obesity, insulin resistance, and cardiovascular complications. The aim of this study is to investigate the role of intestinal flora and its metabolites, particularly short-chain fatty acids (SCFAs), in the development of PCOS, and to assess the effects of metformin therapy on these components. SCFA levels in fecal and blood samples from women with PCOS (n=69) and healthy controls (n=18) were analyzed using Gas Chromatography-Mass Spectrometry (GC/MS) for precise measurement.
View Article and Find Full Text PDFSpectrochim Acta A Mol Biomol Spectrosc
February 2025
Prokhorov General Physics Institute of the Russian Academy of Sciences, Vavilov Str. 38, 119991 Moscow, Russian Federation.
Dalton Trans
October 2024
Lomonosov Moscow State University, Department of Chemistry, 1-3, Leninskie Gory, Moscow, 119991, Russia.
Dinuclear complexes bearing Ru(II) photoactive centers are of interest for the development of efficient dual catalysts for many photocatalyzed reactions. Ditopic polypyridine ligands, bis(pyridin-2-yl)amino-1,10-phenanthrolines, containing an additional coordination site (bis(pyridin-2-yl)amine, dpa) at positions 3, 4 or 5 of the 1,10-phenanthroline core (Phen-3NPy2, Phen-4NPy2 and Phen-5NPy2) were synthesized. They were used as bridging ligands to obtain dinuclear complexes [(bpy)Ru(Phen-NPy2)PdCl](PF) (Ru(Phen-NPy2)Pd) in good yields stepwise complexation.
View Article and Find Full Text PDFJ Biophotonics
October 2024
Department of Physics, National Dong Hwa University, Hualien, Taiwan.
The development of assisted reproductive technologies increases the likelihood of nanoparticles' (NPs) direct contact with gametes and embryos in in vitro conditions. Analyzing the influence of nanomaterials on the early mammalian embryo becomes increasingly relevant. This work is devoted to the effect of graphene oxide (GO) NPs on the in vitro development of mammalian embryos.
View Article and Find Full Text PDFNano Lett
October 2024
Department of Ultrafast Dynamics, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany.
Structural transformations in strongly correlated materials promise efficient and fast control of materials' properties via electrical or optical stimulation. The desired functionality of devices operating based on phase transitions, however, will also be influenced by nanoscale heterogeneity. Experimentally characterizing the relationship between microstructure and phase switching remains challenging, as nanometer resolution and high sensitivity to subtle structural modifications are required.
View Article and Find Full Text PDFChaos
September 2024
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, 53 Leninskiy Prospekt, Moscow 119991, Russian Federation.
In this paper, a network of interacting neurons based on a two-component system of reaction-superdiffusion equations with fractional Laplace operator responsible for the coupling configuration and nonlinear functions of the Hindmarsh-Rose model is considered. The process of synchronization transition in the space of the fractional Laplace operator exponents is studied. This parametric space contains information about both the local interaction strength and the asymptotics of the long-range couplings for both components of the system under consideration.
View Article and Find Full Text PDFPhys Rev E
August 2024
P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninskij Prospekt, 53, 119991 Moscow, Russia.
Ultrafast laser radiation or beams of fast charged particles primarily excite the electronic system of a solid driving the target transiently out of thermal equilibrium. Apart from the nonequilibrium between the electrons and atoms, each subsystem may be far from equilibrium. From first principles, we derive the definition of various atomic temperatures applicable to electronically excited ensembles.
View Article and Find Full Text PDFNanotechnology
September 2024
P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow 119991, Russia.
Emerging fields of quantum technologies and biomedical applications demand pure nanodiamonds (NDs) with well-defined surface chemistry. Therefore, an inexpensive, scalable and eco-friendly ND surface purification technology is required. In this study, we report our method, salt-coated air oxidation (SCAO) thermal annealing, to achieve uniform purification of a ND surface without the loss of diamond material.
View Article and Find Full Text PDFDalton Trans
October 2024
Lomonosov Moscow State University, Moscow 119991, Russia.
We prepared an organically templated magnet, (H)VPOOH (H = diprotonated ethylenediamine), hydrothermally and characterized its crystal structure by powder X-ray diffraction and Fourier-transform infrared spectroscopy, and its physical properties by magnetization, specific heat and nuclear magnetic resonance measurements and density functional theory calculations. (H)VPOOH consists of uniform chains of V (d, = 1) ions and exhibits Haldane magnetism with spin gap = 59.3 K from the magnetic susceptibility () at = 0.
View Article and Find Full Text PDFInt J Mol Sci
September 2024
P.N. Lebedev Physical Institute, 119991 Moscow, Russia.
Conventional X-ray therapy (XRT) is commonly applied to suppress cancerous tumors; however, it often inflicts collateral damage to nearby healthy tissue. In order to provide a better conformity of the dose distribution in the irradiated tumor, proton therapy (PT) is increasingly being used to treat solid tumors. Furthermore, radiosensitization with gold nanoparticles (GNPs) has been extensively studied to increase the therapeutic ratio.
View Article and Find Full Text PDFRev Sci Instrum
September 2024
Institute of Electrophysics UB RAS, 620016 Yekaterinburg, Russia.
This paper presents the results of research, development, and testing of magnetically insulated air diodes with replaceable graphite and stainless-steel tubular and coaxial cathodes of various configurations capable of generating directed bunches of runaway electrons. At the anode, the bunches have cross sections shaped as circles or rings with an outer diameter of 1-2 cm. The durations of the bunches, which carry currents of a few to tens of amperes, range from tens of picoseconds to 100 ps, and their charges range from tenths of a nanocoulomb to a few nanocoulombs.
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