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Poster
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Dear Colleagues, The diseases evolution makes classical organic drugs ineffective in most cases. Several strategies were developed in order to find new effective species for treatment, that take into account the complexes, especially those bearing transition metal ions and multidentate ligands. Some species of this type were developed in recent yea...
Article
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The strength, conductivity, elasticity, inactivity against lithium, and tunability properties of transition metals (TMs) are the major reasons these metals are used to synthesize silicon-based lithium-ion battery (LIBs) composite anodes. This is because TMs significantly influence and improve the overall electrochemical performance of LIB electrode...
Article
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Optoelectronic and thermoelectric properties of two-dimensional (2D) transition metal dinitride (HfN2) have been studied using first-principles calculations. Monolayer and bilayer HfN2 transport properties were calculated by solving the transport equations for electrons and phonons. The highest calculated ZT value for the bilayer HfN2 was 0.85 at 9...
Article
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Introduction of graphene-like heterostructures supported single-atom catalysts (SACs) has been considered as a promising strategy for generating sustainable energy sources. By using first-principles calculation, different kinds of single transition metal (TM = Mn, Fe, Co and Ni) atoms anchored boron phosphide (BP-TM) and the effects of added graphe...
Article
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Here we present the results of experiments designed to reproduce the interaction between super-solidus mercurian magmas and graphite at high temperatures (ramped up from ambient temperature to 1195–1390 °C) and low pressure (10 mbar). The compositions of resultant gases were measured in situ with a thermal gravimeter/differential scanning calorimet...
Article
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Transition metal phosphides (TMPs) have considered as excellent electrocatalysts with high reactivity for hydrogen evolution reaction (HER). While electro-catalytic properties of TMPs are restricted by uneven dispersion, small surface area, poor conductivity, and unsatisfied stability. Herein, a facile procedure was proposed to prepare a hierarchic...
Article
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In the present study, via using a ligand featuring oxalamide groups N,N'-bis(4-phthalic acid) (H4L), two new Cu(II) and Co(II)-containing coordination polymers with the chemical formulae of [Cu2L(H2O)4]n (1) and [Co(H2L)(H2O)2]n (2) have been successfully prepared via reaction of the corresponding metal salts with the H4L ligand. The as-prepared tw...
Article
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Biosorption is an extensive technology applied for the removal of heavy metal ions and other pollutants from aqueous solutions. In the present study, the sorption of metal ions from the polluted huge drain (El Tapia drain) in Abu Qir Bay was determined using nano-magnetic iron oxide and nano-silver oxide, low cost and eco-friendly nano-sorbents, wh...
Cover Page
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Nanotechnology is an emerging field that plays a vital role in the elimination of environmental pollutants. Nanomaterials have been applied for controlling and remediating contaminates (air, soil, and water) because of some of their advanced properties such as large specific surface area. Some nanomaterials based on transition metals can serve as o...
Article
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Transition metal nitrides have attracted considerable attention as great potential anode materials due to their excellent metallic conductivity and high theoretical specific capacity. However, their cycling performance is impeded by their instability caused by the reaction mechanism. Herein, we report the engineering and synthesis of a novel hybrid...
Article
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Magnetic semimetals are very promising for potential applications in novel spintronic devices. Nevertheless, realizing tunable topological states with magnetism in a controllable way is challenging. Here, we report novel magnetic states and the tunability of topological semimetallic states through the control of Eu spin reorientation in Eu1−xSrxMn1...
Article
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A many-body large polaron, which is important for both fundamental physics and technological applications, has been predicted to occur in bismuth vanadate (BiVO4). Herein, using a combination of high-resolution spectroscopic ellipsometry, X-ray absorption spectroscopy at the V L3,2- and O K-edges, and high-resolution X-ray diffraction supported by...
Article
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MXenes are a two-dimensional (2D) class of transition metal carbides, nitrides, and carbonitrides that have been synthesized and developed for diverse purposes, such as energy storage devices. MXenes feature exceptional mechanical strength, outstanding hydrophilicity, and astounding dispersion quality in comparison to other 2D materials, making the...
Article
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Metal-support interactions can dramatically affect the properties of nanocomposite materials. Nevertheless, comprehensive studies of the interfaces between metal nanoparticles and oxide supports remain scarce due to challenges in experimental characterization. A significant understanding of the interactions at such interfaces can be obtained by com...
Article
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Electrochemical and photoelectrochemical water splitting offers a scalable approach to producing hydrogen from renewable sources for sustainable energy storage. Depending on the applications, oxygen evolution catalysts (OECs) may perform water splitting under a variety of conditions. However, low stability and/or activity present challenges to the...
Article
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Fabrication, characterizations and photothermal properties of MXenes are systematically described.Photothermal-derived antibacterial performances and mechanisms of MXenes-based materials are summarized and reviewed.Recent advances in the derivative applications relying on antibacterial properties of MXenes-based materials, including in vitro and in...
Article
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By rational design and parameter engineering of the TiO2-Pt core-satellite construction, visible light absorption in small Pt nanoparticles (NPs) can be enhanced by nearly 100 times. The TiO2 microsphere support works as the optical antenna, giving rise to superior performance compared to conventional plasmonic nanoantennas. A crucial step is to bu...
Article
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Tin disulfide (SnS2) is a member of the layered metal dichalcogenides family. Monolayer SnS2 is a semiconductor with an indirect bandgap of 2.43 eV. It is a nonmagnetic semiconductor. In this article, we systematically study the electronic and magnetic properties of 3d transition metal atom-doped monolayer SnS2. The spin-polarized First-principles...
Article
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Even if Weyl semimetals are characterized by quasiparticles with well-defined chirality, exploiting this experimentally is severely hampered by Weyl lattice fermions coming in pairs with opposite chirality, typically causing the net chirality picked up by experimental probes to vanish. Here, we show this issue can be circumvented in a controlled ma...
Article
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Two-dimensional (2D) transition metal chalcogenides (TMC) and their heterostructures are appealing as building blocks in a wide range of electronic and optoelectronic devices, particularly futuristic memristive and synaptic devices for brain-inspired neuromorphic computing systems. The distinct properties such as high durability, electrical and opt...
Conference Paper
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Face milling is one of the commonly used industrial processes for machining flat surfaces quickly and in a precise way. The present investigation aims at the fabrication of AA 5052 hybrid composite, with weight fractions 10 % of WC particles and 4 % graphite particles as reinforcements and investigates the effect of cutting parameters on the face m...
Preprint
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X-ray absorption spectroscopy (XAS) has gained popularity in recent years as it probes matter with high spatial and elemental sensitivity. However, the theoretical modelling of XAS is a challenging task since XAS spectra feature a fine structure due to scalar (SC) and spin-orbit (SO) relativistic effects, in particular near L and M absorption edges...
Preprint
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A photosensitive and transition metal-free technique without inert gas shielding is reported for the facile synthesis of multifunctional coumarins. The current proce-dure avoids the inherent drawbacks of the previous coumarin production protocol in the presence of transition metal. The prominent aspects of the methodology also include the absence o...
Preprint
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The gap opening mechanism of a topological insulator, the quantum anomalous Hall effect and the axion physics are still pressing open questions and a microscopic viewpoint to further understand the role of magnetism in topology is highly desirable. In this work we have performed a microscopic investigation, by means of electron spin resonance (ESR)...
Article
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The crystal structure studies and electron paramagnetic resonance (EPR) investigations of TlIn 1−x Fe x S 2 with = 0.016 have been performed. The observed energy dispersive X-ray (EDX) spectrum of TlIn 0.984 Fe 0.016 S 2 compound confirmed the presence of all the constituent elements in stoichiometric proportions. It has been concluded that the mag...
Article
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In this paper we present laboratory-scale X-ray absorption spectroscopy applied to the research of nanometer-scale thin films. We demonstrate the Cu K edge X-ray absorption near edge structure (XANES) and extended X-ray absorption fine structure (EXAFS) of CuI and CuO thin films grown with atomic layer deposition. Film thicknesses in the investigat...
Preprint
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Layered crystalline materials that consist of transition metal atoms laid out on a kagome network emerged as a versatile platform to study novel electronic phenomena. Within this realm, vanadium-based kagome superconductors AV3Sb5 (A=K, Cs, Rb) recently attracted a large interest for various exotic electronic states. These states arise within a par...
Article
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Oxygen‐redox‐based‐layered cathode materials are of great importance in realizing high‐energy‐density sodium‐ion batteries (SIBs) that can satisfy the demands of next‐generation energy storage technologies. However, Mn‐based‐layered materials (P2‐type Na‐poor Nay[AxMn1−x]O2, where A = alkali ions) still suffer from poor reversibility during oxygen‐...
Preprint
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Spinel oxides are an ideal setting to explore the interplay between configurational entropy, site selectivity, and magnetism in high entropy oxides. In this work we characterize the magnetic properties of the spinel (Cr,Mn,Fe,Co,Ni)$_3$O$_4$ and study the evolution of its magnetism as a function of non-magnetic gallium substitution. Across the rang...
Preprint
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The anomalous Nernst effect (ANE) is one of the most intriguing thermoelectric phenomena which has attracted growing interest both for its underlying physics and potential applications. Typically, a large ANE response is observed in magnets with pronounced magnetizations or nontrivial Berry curvature. Here, we report a significant ANE signal in com...
Article
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Oxygen reversibly binds to the redox active iron, a transition metal in human Hemoglobin (Hb), which subsequently undergoes oxidation in air. This process is akin to iron rusting in non-biological systems. This results in the formation of non-oxygen carrying methemoglobin (ferric) (Fe ³⁺ ) and reactive oxygen species (ROS). In circulating red blood...
Article
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Exploring efficient electrocatalysts for oxygen evolution reaction (OER) is an urgent need to advance the development of sustainable energy conversion. Though defect engineering is considered an effective strategy to regulate catalyst activity for enhanced OER performance, the controllable synthesis of defective oxides electrocatalysts remains chal...
Article
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Transition metal oxides have captivated extensive courtesy owing to their excellent light harvesting abilities in UV-region for production of opto-electronic devices. Herein, we report the deposition of Zn1 − xMgxO thin film by pulse laser deposition (PLD) technique. Subsequently, the influence of substrate temperature on deposited thin film has be...
Article
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ZnO nanostructures were synthesized by a combination of non-aqueous and aqueous sol-gel techniques to obtain morphologically different ZnO nanostructures, nanorods, and nanopyramids, featuring oxygen vacancies-rich exposed lattice faces and exhibiting different catalytic properties and activity. In particular, ZnO nanorods with high surface area (3...
Article
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Enhancing electron correlation in a weakly interacting topological system has great potential to promote correlated topological states of matter with extraordinary quantum properties. Here, the enhancement of electron correlation in a prototypical topological metal, namely iridium dioxide (IrO2), via doping with 3d transition metal vanadium is demo...
Preprint
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Transition metal nitrides (TMNs) exhibit fascinating physical properties that hold great potential in future device applications. To stack two-dimensional TMNs with other functional materials that have dissimilar orientations and symmetries requires to separate epitaxial TMNs from the growth substrates. However, the lattice constants of TMNs are no...
Preprint
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A photosensitive and transition metal-free technique without inert gas shielding is reported for the facile synthesis of multifunctional coumarins. The current proce-dure avoids the inherent drawbacks of the previous coumarin production protocol in the presence of transition metal. The prominent aspects of the methodology also include the absence o...
Article
Full-text available
The combined catalytic systems derived from organocatalysts and transition metals exhibit powerful activation and stereoselective-control abilities in asymmetric catalysis. This work describes a highly efficient chiral aldehyde-nickel dual catalytic system and its application for the direct asymmetric α−propargylation reaction of amino acid esters...
Article
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The magnetic, optical, and phonon properties of ion-doped CuAlO2 nanoparticles on the Cu or Al site are theoretically investigated. The room temperature ferromagnetism in CuAlO2 nanoparticles can be due to the surface, size, and doping effects. The magnetization increases with the decreasing nanoparticle size. The different radii of the transition...
Preprint
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A real-space method using generating integers is used to classify the possible moire patterns for two equal hexagonal lattices. The result is that the rotations that take (n,m) to (m,n) with n,m relatively prime form the fundamental moire transformations, and the number of lattice coincidence areas within each supercell is given by (n-m)^2. The sch...
Article
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Catalytic N2 activation and reduction for ammonia synthesis has been subject to intense research interest. Cluster-modified catalysts have been proposed as promising candidates for nitrogen activation due to the featured active sites and maximized synergistic effect. However, the nature of metal clusters itself has not been fully unveiled. Herein,...
Article
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Despite numerous experimental and theoretical studies devoted to the oxygen evolution reaction (OER), the mechanism of the OER on transition metal oxides remains controversial. This is in part owing to the ambiguity of electrochemical parameters of the mechanism such as the Tafel slope and reaction orders. We took the most commonly assumed adsorbat...
Article
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The uncontrolled oxidative decomposition of electrolyte while operating at high potential (> 4.2 V vs Li/Li ⁺ ) severely affects the performance of high-energy density transition metal oxide-based materials as cathodes in Li-ion batteries. To restrict this degradative response of electrolyte species, the need for functional molecules as electrolyte...
Article
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A semi-automated diffusion-dialysis purification procedure is proposed for the preparation of uncontaminated graphene oxide (GO) aqueous dispersions. The purification process is integrated with analytical-signal processing to control the purification degree online by several channels: oxidation-reduction potential, conductivity, and absorbance. Thi...
Article
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The application of transition metal oxides/hydroxides in energy storage has long been studied by researchers. In this paper, the core-shell CNFs@Ni(OH)2/NiO composite electrodes were prepared by calcining carbon nanofibers (CNFs) coated with Ni(OH)2 under an N2 atmosphere, in which NiO was generated by the thermal decomposition of Ni(OH)2. After lo...
Article
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Transition metal oxide nanostructures are promising materials for energy storage devices, exploiting electrochemical reactions at nanometer solid–liquid interface. Herein, WO3 nanorods and hierarchical urchin-like nanostructures were obtained by hydrothermal method and calcination processes. The morphology and crystal phase of WO3 nanostructures we...
Article
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The potential of operando X-ray techniques for following the structure, fate, and active site of single-atom catalysts (SACs) is highlighted with emphasis on a synergetic approach of both topics. X-ray absorption spectroscopy (XAS) and related X-ray techniques have become fascinating tools to characterize solids and they can be applied to almost al...
Article
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Two-dimensional (2D) molybdenum telluride (MoTe2) is attracting increasing attention for its potential applications in electronic, optoelectronic, photonic and catalytic fields, owing to the unique band structures of both stable 2H phase and 1T′ phase. However, the direct growth of high-quality atomically thin MoTe2 with the controllable proportion...
Preprint
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Covalent organic frameworks (COF) is an outstanding manifesto for heterogeneous photocatalysis. Herein, we synthesized a pyrene-based two-dimensional C=C linked π-conjugated COF via Knoevenagel condensation and anchored Ni(II)-center through bipyridine moieties. Instead of traditional dual metallaphotoredox catalysis, the mono-metal decorated Ni@Bp...
Article
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Due to the ever-growing importance of rechargeable lithium-ion batteries, the development of electrode materials and their processing techniques remains a hot topic in academia and industry. Even the well-developed and widely utilized active materials present issues, such as surface reactivity, irreversible capacity in the first cycle, and ageing....
Article
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As one of the high‐energy cathode materials of lithium‐ion batteries (LIBs), lithium‐rich‐layered oxide with “single‐crystal” characteristic (SC‐LLO) can effectively restrain side reactions and cracks due to the reduced inner boundaries and enhanced mechanical stabilities. However, there are still high challenges for SC‐LLO with diverse performance...
Article
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Is it possible to reconstruct the gesture of an ancient artist applying a paint layer, considering that the orientation distribution of crystallites of an inorganic pigment remains definitively imprinted on the support after drying of the layer? If the pigment contains paramagnetic transition metal ions whose magnetic interactions are themselves an...
Article
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The designing of new technologies for wastewater treatment is needed. These procedures should have greater efficiency and broad engineering application scope. Among these technologies, the advanced oxidation processes (AOP) have shown high efficiency and potential application in the degradation of hazardous pollutants. Fenton and Fenton-type reacti...
Preprint
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With a rapid growth in artificial intelligence, designing high-speed and low power semiconducting material is of utmost importance. This investigation provides a theoretical basis to access covalently-bonded transition metal-graphene nanoribbon (TM-GNR) hybrid semiconductors whose DFT-computed bandgaps were much narrower than the commonly used pent...
Article
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Platinum (Pt) is regarded as a promising electrocatalyst for hydrogen evolution reaction (HER). However, its application in an alkaline medium is limited by the activation energy of water dissociation, diffusion of H⁺, and desorption of H*. Moreover, the formation of effective structures with a low Pt usage amount is still a challenge. Herein, guid...