624 results match your criteria: "UMR 7504 (CNRS-Université de Strasbourg)[Affiliation]"
Phys Rev E
November 2024
Raymond & Beverly Sackler School of Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel.
We present a technique for efficiently transitioning a quantum system from an initial to a final stationary state in less time than is required by an adiabatic (quasistatic) process. Our approach makes use of Nelson's stochastic quantization, which represents the quantum system as a classical Brownian process. Thanks to this mathematical analogy, known protocols for classical overdamped systems can be translated into quantum protocols.
View Article and Find Full Text PDFNanophotonics
November 2024
Universite Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, UMR5306, F-69100, Villeurbanne, France.
In view of the recent increased interest in light-induced manipulation of magnetism in nanometric length scales this work presents metal clusters as promising elementary units for generating all-optical ultrafast magnetization. We perform a theoretical study of the opto-magnetic properties of metal clusters through ab-initio real-time (RT) simulations in real-space using time-dependent density functional theory (TDDFT). Through ab-initio calculations of plasmon excitation with circularly polarized laser pulse in atomically precise clusters of simple and noble metals, we discuss the generation of orbital magnetic moments due to the transfer of angular momentum from light field through optical absorption at resonance energies.
View Article and Find Full Text PDFJ Phys Condens Matter
November 2024
Institute of Applied Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10/134, Wien, 1040, AUSTRIA.
The transition from planar (2D) to three-dimensional (3D) magnetic nanostructures represents a significant advancement in both fundamental research and practical applications, offering vast potential for next-generation technologies like ultrahigh-density storage, memory, logic, and neuromorphic computing. Despite being a relatively new field, the emergence of 3D nanomagnetism presents numerous opportunities for innovation, prompting the creation of a comprehensive roadmap by leading international researchers. This roadmap aims to facilitate collaboration and interdisciplinary dialogue to address challenges in materials science, physics, engineering, and computing.
View Article and Find Full Text PDFDalton Trans
November 2024
Institut für Experimentelle Physik, TU Bergakademie Freiberg, Leipziger Straße 23, 09596 Freiberg, Germany.
YbRhSn crystallizes with a unique structural arrangement [space group 4/, = 9.6997(4) Å, = 13.7710(7) Å], which is related with primitive cubic YbRhSn and body-centered tetragonal (SnTb)TbRhSn types.
View Article and Find Full Text PDFAdv Mater
October 2024
CNR-SPIN, Complesso Univ. Monte S. Angelo, Naples, I-80126, Italy.
In a 2D electron system (2DES) the breaking of the inversion, time-reversal and bulk crystal-field symmetries is interlaced with the effects of spin-orbit coupling (SOC) triggering exotic quantum phenomena. Here, epitaxial engineering is used to design and realize a 2DES characterized simultaneously by ferromagnetic order, large Rashba SOC and hexagonal band warping at the (111) interfaces between LaAlO, EuTiO, and SrTiO insulators. The 2DES displays anomalous quantum corrections to the magneto-conductance driven by the time-reversal-symmetry breaking occurring below the magnetic transition temperature.
View Article and Find Full Text PDFPhys Rev Lett
October 2024
Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
Tip-enhanced photoluminescence (TEPL) measurements are performed with subnanometer spatial resolution on individual molecules decoupled from a metallic substrate by a thin NaCl layer. TEPL spectra reveal progressive fluorescence quenching with decreasing tip-molecule distance when electrons tunneling from the tip of a scanning tunneling microscope are injected at resonance with the molecular states. Rate equations based on a many-body model reveal that the luminescence quenching is due to a progressive population inversion between the ground neutral (S_{0}) and the ground charge (D_{0}^{-}) states of the molecule occurring when the current is raised.
View Article and Find Full Text PDFUltrason Sonochem
December 2024
Laboratoire Matière Condensée et Sciences Interdisciplinaires, LaMCScI, URL-17-CNRST, Faculty of Sciences, BP 1014 RP, Mohammed V University in Rabat, 10000 Rabat, Morocco. Electronic address:
Zinc-Manganese spinel ferrites (ZnMnFeO) are nowadays very attractive magnetic materials for cancer diagnostic and therapy. With the help of intense ultrasonic waves, sonochemical synthesis method was used to prepare stoichiometric and chemically homogenous nanoparticles by varying the manganese content. The crystal structure along with the size and shape of the as-prepared nanoparticles were described using XRD, TEM and FT-IR techniques, while cations distribution was carefully investigated using XPS and Mössbauer spectroscopic techniques and supported with density functional theory calculations.
View Article and Find Full Text PDFNanoscale
November 2024
Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux, UMR CNRS-UdS 7504, 23 Rue du Loess, BP 43, 67034 Strasbourg, France.
Designing iron oxide nanoparticles (IONPs) to effectively combine magnetic hyperthermia (MH) and photothermia (PTT) in one IONP formulation presents a significant challenge to ensure a multimodal therapy allowing the adaptation of the treatment to each patient. Recent research has highlighted the influence of factors such as the size, shape, and amount of defects on both therapeutic approaches. In this study, 20-25 nm spherical IONPs with a spinel composition were synthesized by adapting the protocol of the thermal decomposition method to control the amount of defects.
View Article and Find Full Text PDFAdv Mater
December 2024
International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan.
Chirality
October 2024
Institut de Physique et Chimie des Matériaux de Stasbourg (IPCMS), Université de Strasbourg - CNRS UMR 7504, Strasbourg Cedex, France.
ACS Nano
October 2024
Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
Interactions between molecular electronic and vibrational states manifest themselves in a variety of forms and have a strong impact on molecular physics and chemistry. For example, the efficiency of energy transfer between organic molecules, ubiquitous in biological systems and in organic optoelectronics, is strongly influenced by vibronic coupling. Using an approach based on scanning tunneling microscope-induced luminescence (STML), we reveal vibronic interactions in optical spectra of a series of single phthalocyanine derivative molecules featuring degenerate or near-degenerate excited states.
View Article and Find Full Text PDFNucleic Acids Res
October 2024
Institut de Physique et Chimie des Matériaux de Strasbourg, CNRS UMR 7504, Université de Strasbourg, 23, rue du Loess, 67000 Strasbourg, France.
Molecular cloning, a routine yet essential technique, relies heavily on efficient ligation, which can be significantly improved using Golden Gate Assembly (GGA). A key component of GGA is the use of type IIS enzymes, which uniquely cleave downstream of their recognition sequences to generate various overhangs, including non-palindromic ones. Recent advancements in GGA include the development of newly engineered enzymes with enhanced activity.
View Article and Find Full Text PDFNanoscale
August 2024
Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR-7504 CNRS-Université de Strasbourg, 23 rue du Lœss, BP 34 67034, Strasbourg Cedex 2, France.
Core-shell nanocomposites made of iron oxide core (IO NPs) coated with mesoporous silica (MS) shells are promising theranostic agents. While the core is being used as an efficient heating nanoagent under alternating magnetic field (AMF) and near infra-red (NIR) light and as a suitable contrast agent for magnetic resonance imaging (MRI), the MS shell is particularly relevant to ensure colloidal stability in a biological buffer and to transport a variety of therapeutics. However, a major challenge with such inorganic nanostructures is the design of adjustable silica structures, especially with tunable large pores which would be useful, for instance, for the delivery of large therapeutic biomolecule loading and further sustained release.
View Article and Find Full Text PDFACS Nano
August 2024
Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS, UMR 7504, F-67000 Strasbourg, France.
Quantum emitters in two-dimensional layered hexagonal boron nitride are quickly emerging as a highly promising platform for next-generation quantum technologies. However, the precise identification and control of defects are key parameters to achieve the next step in their development. We conducted a comprehensive study by analyzing over 10,000 photoluminescence emission lines from liquid exfoliated hBN nanoflake samples, revealing 11 narrow sets of defect families within the 1.
View Article and Find Full Text PDFBiochem Biophys Res Commun
October 2024
Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504, F-6700, Strasbourg, France; Université Paris Cité, UFR Sciences du vivant, F-75013, Paris, France. Electronic address:
Single-molecule techniques are highly sensitive tools that can reveal reaction intermediates often obscured in experiments involving large ensembles of molecules. Therefore, they provide unprecedented information on the mechanisms that control biomolecular reactions. Currently, one of the most significant single-molecule assays is Magnetic Tweezers (MT), which probes enzymatic reactions at high spatio-temporal resolutions on tens, if not hundreds, of molecules simultaneously.
View Article and Find Full Text PDFDalton Trans
July 2024
Institut de Chimie Moléculaire et des Matériaux d'Orsay, Université Paris-Saclay, CNRS, UMR 8182, 91405 Orsay 12 Cedex, France.
We synthesized a sublimable molecular spin crossover Fe(II) complex based on the Schiff base tridentate ligand qsal-NEt (5-diethylamino-2-((quinolin-8-ylimino)methyl)phenol). The compound undergoes a transition in temperature with thermally induced excited spin state-trapping (TIESST) for high-temperature sweep rates, which can be suppressed by reducing the sweep rate. The X-ray absorption spectroscopy (XAS) studies on the microcrystalline powder confirm the TIESST effect.
View Article and Find Full Text PDFMater Horiz
September 2024
Université de Strasbourg, CNRS, ICPEES UMR 7515, 67087 Strasbourg, France.
Recently, polar side chains have emerged as a functional tool to enhance conjugated polymer doping properties by improving the polymer miscibility with polar chemical dopants and facilitate solvated ion uptake. In this work, we design and investigate a novel family of side chains containing a single ether function, enabling the modulation of the oxygen atom position along the side chain. A meticulous investigation of this new polymer series by differential scanning calorimetry, fast scanning chip calorimetry and X-ray scattering shows that polymers bearing single-ether side chains can show high degree of crystallinity under proper conditions.
View Article and Find Full Text PDFACS Appl Mater Interfaces
July 2024
Department of Physics and Astronomy, Uppsala University, Box 516, Uppsala SE-751 20, Sweden.
Two-dimensional (2D) van der Waals heterostructures combine the distinct properties of individual 2D materials, resulting in metamaterials, ideal for emergent electronic, optoelectronic, and spintronic phenomena. A significant challenge in harnessing these properties for future hybrid circuits is their large-scale realization and integration into graphene interconnects. In this work, we demonstrate the direct growth of molybdenum disulfide (MoS) crystals on patterned graphene channels.
View Article and Find Full Text PDFBioact Mater
September 2024
Institut de Physique et Chimie des Matériaux de Strasbourg, IPCMS, UMR 7504 CNRS, Université de Strasbourg, 67000, Strasbourg, France.
The study examines the impact of microstructure and polymethyl methacrylate (PMMA) grafting on the degradability of Zn-Mg alloys. The mechanical properties of a Zn alloy containing 0.68 wt% Mg and extruded at 200 °C are enhanced for degradable load-bearing applications, addressing a crucial need in the field.
View Article and Find Full Text PDFChemistry
August 2024
Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg-CNRS UMR 7504, 23 rue du Loess, BP 43, 67034, Strasbourg Cedex 2, France.
The synthesis of sulfoxide-functionalized NHC ligand precursors were carried out by direct and mild oxidation from corresponding thioether precursors with high selectivity. Using these salts, a series of cationic [Ru(II)(η-p-cymene)(NHC-SO)Cl] complexes were obtained in excellent yields by the classical AgO transmetallation route. NMR analyses suggested a chelate structure for the metal complexes, and X-ray diffractometry studies of complexes 4 b, 4 c, 4d and 4 e unambiguously confirmed the preference for the bidentate (κ-C,S) coordination mode of the NHC-SO ligands.
View Article and Find Full Text PDFDalton Trans
June 2024
Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad-500 107, India.
A rigid pentadentate chelating ligand (HL) has been utilized to synthesize a series of octacoordinate mononuclear complexes, [Dy(L)(PhPO)(OOCR)] (where R = CH (1), C(CH) (2), CF (3)) and a dinuclear complex, [Dy(L)(PhPO){(OOC)CH}] (4) based on the highly anisotropic Dy(III) ion. All the complexes were structurally characterized by single-crystal X-ray diffraction studies. The complexes were formed by the coordination action of the dianionic pentadentate ligand [L], one phosphine oxide, and carboxylate ligands.
View Article and Find Full Text PDFNanoscale Adv
May 2024
Université de Strasbourg, CNRS, Institut de Physique et Chimie des Matériaux de Strasbourg, UMR 7504 F-67000 Strasbourg France
A series of exchange-coupled magnetic nanoparticles combining several magnetic phases in an onion-type structure were synthesized by performing a three-step seed-mediated growth process. Iron and cobalt precursors were alternatively decomposed in high-boiling-temperature solvents (288-310 °C) to successively grow CoO and FeO shells (the latter in three stages) on the surface of FeO seeds. The structure and chemical composition of these nanoparticles were investigated in depth by combining a wide panel of advanced techniques, such as scanning transmission electron microscopy (STEM), electron energy-loss spectroscopy-spectrum imaging (EELS-SI), Fe Mössbauer spectrometry, and X-ray circular magnetic dichroism (XMCD) techniques.
View Article and Find Full Text PDFPhys Rev E
April 2024
G. V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine, 36 Acad. Vernadsky Boulevard, UA-03142 Kyiv, Ukraine and Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
The probability distribution (PD) of spin configurations in kinetic Ising models has been cast in the form of the canonical Boltzmann PD with a time-dependent effective Hamiltonian (EH). It has been argued that in systems with extensive energy EH depends linearly on the number of spins N leading to the exponential dependence of PD on the system size. In macroscopic systems the argument of the exponential function may reach values of the order of the Avogadro number which is impossible to deal with computationally, thus making unusable the linear master equation (ME) governing the PD evolution.
View Article and Find Full Text PDFACS Nano
May 2024
Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France.
Magnetometry plays a pivotal role in addressing the requirements of ultradense storage technology and overcoming challenges associated with downscaled spin qubits. A promising approach for atomic-scale single-spin sensing involves utilizing a magnetic molecule as a spin sensor, although such a realization is still in its early stages. To tackle this challenge and underscore the potential of this method, we combined a nickelocene molecule with scanning tunneling microscopy to perform versatile spin-sensitive imaging of magnetic surfaces.
View Article and Find Full Text PDFSmall
May 2024
Institut de Physique et Chimie des Matériaux, UMR 7504, Université de Strasbourg, CNRS, Strasbourg, 67034, France.
Low-dimensional materials based on graphene or graphite show a large variety of phenomena when they are subjected to irradiation with energetic electrons. Since the 1990s, electron microscopy studies, where a certain irradiation dose is unavoidable, have witnessed unexpected structural transformations of graphitic nanoparticles. It is recognized that electron irradiation is not only detrimental but also bears considerable potential in the formation of new graphitic structures.
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