bluuebunny/crossref_metadata_2025_split huggingface dataset:
Échelles subjectives de durée obtenues par une méthode de bissection
Authors: Bovet Pierre 
Published: December 2007

Une suite de bissections, portant sur un total de 12 sujets, a permis de construire des échelles psychophysiques individuelles directes, dans une marge de durées allant de 1/3 de secondes à 2 seconde environ. On utilisait des sons pleins de 1 000 cs, les bissections étant réalisées par une procédure combinée de production et de réglage.
Toutes les échelles obtenues sont d'allure linéaire. Mais la présentation des durées en ordre croissant conduit systématiquement à des bissections plus longues qu'en ordre décroissant.
Electron Spin Polarization Engineering in Ferromagnetic Bioheterojunction for Sonotherapy of Osteomyelitis
Authors: Ding Tiexin , Li Yan , Liu Fuwei , Chen Jun , Chen Yicheng , Kong Liang , Han Yong , Zhang Lan 
Published: April 2024

AbstractElectron spinning polarization has garnered increased attention for its potential to enhance device properties. However, its application in life health, specifically in anti‐infection and tissue repair, remains under‐explored. In this study, a ferromagnetic heterojunction CF (Fe3O4/TiO2) is constructed with spin‐polarized electrons, demonstrating efficient antibiosis performance with ultrasound (US) assistance. The antibacterial mechanism is elucidated as follows: spin‐polarized metallic states of Fe3O4 induce an asymmetric distribution in the electron spin state of TiO2, increasing the density of states of spin‐polarized electrons near the Fermi level of CF. Under US treatment, the built‐in electric field and spin‐polarized electrons in CF synergistically suppress the recombination of sono‐activated carriers, promoting reactive oxygen species (ROS) production. Simultaneously, the bacterial membrane is influenced by the micromagnetic field induced by spin‐polarized electrons, causing a severe disturbance in the bacterial respiratory chain. The combined damage from ROS and disturbed respiratory chain results in bacterial death. Fortunately, the micromagnetic field built by CF activates specific mechanosensitive ion channels, including TREK1, Piezo1, and related pathways, enhancing osteoblast differentiation. Sonotherapy using CF exhibits an excellent therapeutic effect in treating osteomyelitis. This study provides novel insights into manipulating spin electrons for applications in life health.
Topological Phase Transformation and Collapse Dynamics of Spin Textures in a Non‐Centrosymmetric D2d System
Authors: Jena Jagannath , Koraltan Sabri , Bruckner Florian , Holst Konstantin , Tangi Malleswararao , Abert Claas , Felser Claudia , Suess Dieter , Parkin Stuart S.P. 
Published: April 2024

AbstractRecently a large variety of non‐collinear spin textures have been revealed in various crystals with different symmetry groups. Of particular interest are crystals with D2d symmetry that exhibit a complex variety of stable and metastable spin textures that includes antiskyrmions, elliptical Bloch‐skyrmions, fractional‐antiskyrmions, fractional Bloch‐skyrmions, and type‐II trivial‐bubbles. The observation of these structures necessitates their stabilization via magnetic field and temperature protocols which demands a thorough understanding of their creation, transformation, and collapse dynamics. Utilizing the real‐space imaging capabilities of Lorentz transmission electron microscopy, the generation and annihilation of diverse spin textures in a single D2d Heusler compound are demonstrated. It is showed that antiskyrmions and elliptical Bloch‐skyrmions can be deformed into more elaborate elongated magnetic nano‐objects through a collapse mechanism. Their elongation is governed by the intrinsic antisymmetric Dzyaloshinskii‐Moriya vector exchange interaction and dipolar energy present in the system. Furthermore, antiskyrmions are found to be metastable at all temperatures on field‐cooling, while a topological phase transformation from elliptical Bloch‐skyrmions to antiskyrmions rather takes places on field‐heating. These results are corroborated by micromagnetic simulations and demonstrate the efficient manipulation of different spin textures in a D2d compound by varying field and temperature protocols and represents a critical step toward the application of magnetic skyrmions.
A Natural Casein‐Based Separator with Brick‐and‐Mortar Structure for Stable, High‐Rate Proton Batteries
Authors: Li Rui , Yang Mingsheng , Ma Huige , Wang Xinyu , Yu Haiping , Li Mengxiao , Wang Zhihui , Zheng Liping , Li Hongwei , Hao Yuxin , Hu Mingjun , Yang Jun 
Published: April 2024

AbstractRechargeable aqueous proton batteries with small organic molecule anodes are currently considered promising candidates for large‐scale energy storage due to their low cost, stable safety, and environmental friendliness. However, the practical application is limited by the poor cycling stability caused by the shuttling of soluble organic molecules between electrodes. Herein, a cell separator is modified by a GO‐casein‐Cu2+ layer with a brick‐and‐mortar structure to inhibit the shuttling of small organic molecules. Experimental and calculation results indicate that, attributed to the synergistic effect of physical blocking of casein molecular chains and electrostatic and coordination interactions of Cu2+, bulk dissolution and shuttling of multiple small molecules can be inhibited simultaneously, while H+ transfer across the separators is not almost affected. With the protection of the GO‐casein‐Cu2+ separator, soluble small molecules, such as diquinoxalino[2,3‐a:2',3'‐c]phenazine,2,3,8,9,14,15‐hexacyano (6CN‐DQPZ) exhibit a high reversible capacity of 262.6 mA h g−1 and amazing stability (capacity retention of 92.9% after 1000 cycles at 1 A g−1). In addition, this strategy is also proved available to other active conjugated small molecules, such as indanthrone (IDT), providing a general green sustainable strategy for advancing the use of small organic molecule electrodes in proton cells.
Two‐Photon Printing of Base‐Catalyzed Resins Involving Thiol‐Michael Network Formation
Authors: Jeske Madelyn P. , Bonino Mark J. , Huang Xi , Harding David R. , Lu Yongfeng , Anthamatten Mitchell 
Published: April 2024

AbstractTwo‐photon printing is accomplished using a photobase generator, 2‐(2‐nitrophenyl)‐propyloxycarbony tetramethyl guanidine, to locally catalyze thiol‐ene coupling between multifunctional monomers while mitigating chain‐growth polymerization with free radical scavengers. Microstructures printed from base‐catalyzed resins exhibit higher resolution (linewidths < 400 nm) and lower print error (<3%) than analogous microstructures printed using a photosensitive, free radical initiator. Further, Raman spectroscopy reveals that resins polymerized using the photobase generator in the presence of free radical scavengers exhibit higher selectivity of thiol‐ene coupling over radical polymerization, resulting in stiffer, more uniform polymer networks. The base‐catalyzed resins are capable of producing 3D microstructures printed with high accuracy and minimal post‐processing defects. A direct comparison between free radical and base‐initiated resins highlights the need for mindful consideration of how chemical reaction pathway influences printability and network end‐properties when designing resins.
Xolography for the Production of Polymeric Multimaterials
Authors: Corrigan Nathaniel , Li Xichuan , Zhang Jin , Boyer Cyrille 
Published: April 2024

AbstractThree‐dimensional (3D) printed multimaterials have quickly grown in interest as researchers aim to mimic the material chemistry and geometric complexity of natural materials. While some exceptional multimaterial 3D printing systems have been developed, there is still a shortfall in the scope and production of these materials. More recently, the introduction of xolography as a single‐step, auxiliary‐free additive manufacturing approach has enabled rapid production of materials with geometries inaccessible via other additive manufacturing techniques. However, previous systems required resins with high transparency for effective material formation, and multimaterial formation has not been demonstrated. In this work, reversible deactivation radical polymerization is used and resin composition, viscosity, and processing parameters are explored to develop new resins capable of application to visible light‐mediated xolography. After optimization, non‐transparent resins containing thiocarbonylthio species are applied to xolography to manufacture geometrically complex, auxiliary‐free materials. The resulting 3D printed polymer network materials can be functionalized via the embedded thiocarbonylthio moieties to impart new functionality to the printed materials. Finally, the unique 3D printing capabilities of xolography are demonstrated to manufacture multimaterials featuring chemically disparate domains with high 3D‐spatial control. This two‐step overprinting approach is operationally simple and provides a new avenue for manufacturing polymeric multimaterials via 3D printing.
Universal Surface Repairing Strategy Enabling Suppressed Auger Recombination in CsPbBr3 Perovskite Quantum Dots for Low Threshold Lasing in a Superlattice Microcavity
Authors: Yang Hongyu , Li Jingzhou , Wang Zhanpeng , Zhong Yichi , Yang Hanhuai , Dong Hongxing , Zhang Long 
Published: April 2024

AbstractLead halide perovskite quantum dots (LHP QDs) emerge as versatile photonic sources in electroluminescence and laser devices. Their applications in optoelectronic devices are hindered by surface distortion and ligand stripping during the purification process. In addition, the device performance roll‐off suffers from the ultrafast non‐radiative Auger recombination (AR). To address these issues, herein, CsPbBr3 QDs are prepared with sizes ranging from 6.5 to 9.2 nm and the universal surface repairing strategy is proved to efficiently increase the biexciton lifetime and quantum yield up to 1.4 and 3 times, respectively. The strategy provides a PbBrx rich surface and strong binding didodecyldimethylammonium bromide (DDAB) ligands to achieve near‐unity photoluminescence efficiency, which significantly improves their stability against anti‐solvents and aging in ambient conditions. A single‐mode laser device is realized by self‐assembling the QDs into superlattice as optical microcavity, with low threshold of 9.45 µJ cm−2, quality factor of 2187 and ultrafast lifetime of 3.22 ps. The superlattice laser is demonstrated as an optical encoder with large coding bandwidth of 0.133 THz. This work proposes new insight into the non‐radiative AR process in these single‐component CsPbBr3 QDs, and will pave the way for optoelectronic devices working in intense conditions.
Catalysts Based on Ni and Mg Oxides for the One‐Pot Production of High Added‐Value Products from Furfural
Authors: Maderuelo‐Solera Rocío , Jiménez‐Gómez Carmen Pilar , Cecilia Juan Antonio , García‐Sancho Cristina , Moreno‐Tost Ramón , Jesús Maireles‐Torres Pedro 
Published: April 2024

AbstractA family of NiO‐MgO samples with Ni/Mg molar ratio between 0.10 and 0.30 are synthesized by co‐precipitation and subsequent calcination. The characterization of the samples show the formation of a solid solution with a periclase structure in such a way that the Ni2+species are poorly reducible. After the reduction of the NiO‐MgO samples at 500 °C, the catalysts are tested in the furfural (FUR) hydrogenation to obtain valuable products in a one‐pot reaction. The catalysts are highly selective toward tetrahydrofurfuryl alcohol (THFA) with a yield above 50% in most cases as well as 1,2‐pentanediol (1,2‐PeD) and 1,5‐pentanediol (1,5‐PeD) with maximum yield of 22 and 23% after 22 h of reaction at 170 °C and 4 MPa of H2, respectively. The present work also suggests the presence of two routes in the furfuryl hydrogenation. The first one is associated with the reduction of furfural to furfuryl alcohol (FOL) and the hydrogenation of the ring yielding THFA. In the second route, once FOL is formed, the furanic ring is open to form 1,2‐PeD and 1,5PeD.
Multi‐Purpose Improvements in Catalytic Activity for Li‐Ion Deposited TiO2, SnO2, and CeO2 Nanoparticles through Oxygen‐Vacancy Control
Authors: Hoang Dung Thanh , Lim Donghoon , Kang Myung Jong , Yu Hyejin , Pham Vy Ngoc , Park Joon Ho , Ihm Kyuwook , Kim Hyun Sung , Ahn Hyun S. , Lee Hangil 
Published: April 2024

AbstractControlling the number of oxygen vacancies (Vos) in metal‐oxide nanoparticles (MO NPs; TiO2, SnO2, and CeO2) using Li‐ions has been shown to endow MO NPs with improved photocatalytic and electrocatalytic properties. Increasing the number of Vos in nanostructures provides a foundation for efficient multi‐use catalyst designs that facilitate biomass oxidation reactions and improve electrocatalytic activity. Herein, the trends in the properties of MO‐based catalysts are investigated with varying amounts of Vos achieved by Li‐ion deposition. The controlled introduction of Vos into MO NPs tunes the band structures and surface chemistry, leading to enhanced activities of the NPs as photocatalysts for the selective oxidation of 2,5‐hydroxymethylfurfural and as electrocatalysts for acidic hydrogen evolution. It is believed that Li‐ion deposition in the MO matrix provides a novel approach for optimizing oxide‐based catalyst defect engineering, thereby enabling more efficient biomass conversion and water splitting. These findings contribute significantly to the field of multi‐purpose catalysis and are expected to inspire new catalyst designs for a more sustainable future. The results provide a pathway for the facile and efficient engineering of surface defect structures on catalytic metal oxide NPs toward designing high‐performance photocatalysts.
Theoretically Insight into Co and S Pairs Dispersed on N‐Doped Graphene: Promising Bifunctional Electrocatalysts for Oxygen Reduction/Evolution Reactions
Authors: Zhang Ji , Yu Aimin , Li Dongsheng , Sun Chenghua 
Published: April 2024

AbstractSingle atom catalysts (SACs) are considered as efficient catalysts for hydrogen‐based energy conversion and storage because of their excellent catalytic performance for oxygen evolution reactions (OER) and oxygen reduction reactions (ORR). In the present work, a new concept of SACs is proposed with the capacity to form d‐p orbital hybridization. These computationally designed SACs contain a metal and non‐metal pair embedded in the N‐doped graphene framework (MX@N6). Based on the overpotential evaluation by the first principle theory calculations, CoS@N6 containing Co and S atom pair possessed a low overpotential of 0.37 V/0.29 V when used as a bifunctional ORR/OER catalyst. These overpotentials are much lower than Co@N6 without S atom. The electronic structure analysis revealed that non‐metal atoms of the catalyst can regulate the electronic structure of active metal sites and facilitate the adsorption and charge transfer between intermediates and the catalyst resulting in enhanced catalytic performance. This work demonstrates an alternative way to further improve the catalytic activity of SACs by introducing a non‐metal atom that may shed light on the rational design of advanced SACs for ORR/OER with high efficiency and stability.
Beyond von Neumann Architecture: Brain‐Inspired Artificial Neuromorphic Devices and Integrated Computing
Authors: Seok Hyunho , Lee Dongho , Son Sihoon , Choi Hyunbin , Kim Gunhyoung , Kim Taesung 
Published: April 2024

AbstractBrain‐inspired parallel computing is increasingly considered a solution to overcome memory bottlenecks, driven by the surge in data volume. Extensive research has focused on developing memristor arrays, energy‐efficient computing strategies, and varied operational mechanisms for synaptic devices to enable this. However, to realize truly biologically plausible neuromorphic computing, it is essential to consider temporal and spatial aspects of input signals, particularly for systems based on the leaky integrate‐and‐fire model. This review highlights the significance of neuromorphic computing and outlines the fundamental components of hardware‐based neural networks. Traditionally, neuromorphic computing has relied on two‐terminal devices such as artificial synapses. However, these suffer from significant drawbacks, such as current leakage and the lack of a third terminal for precise synaptic weight adjustment. As alternatives, three‐terminal synaptic devices, including memtransistors, ferroelectric, floating‐gate, and charge‐trapped synaptic devices, as well as optoelectronic options, are explored. For an accurate replication of biological neural networks, it is vital to integrate artificial neurons and synapses, implement neurobiological functions in hardware, and develop sensory neuromorphic computing systems. This study delves into the operational mechanisms of these artificial components and discusses the integration process necessary for realizing biologically plausible neuromorphic computing, paving the way for future brain‐inspired electronic systems.
Sulfonated Polystyrene/Polybenzimidazole Bilayer Membranes for Vanadium Redox Flow Batteries
Authors: Ikhsan Muhammad Mara , Abbas Saleem , Do Xuan Huy , Ha Heung Yong , Azizi Kobra , Henkensmeier Dirk 
Published: April 2024

AbstractPolybenzimidazole has been widely examined as a separator for vanadium redox flow batteries (VRFBs) due to its low vanadium permeability. Its low conductivity can be tackled by combining 1–4 µm thin dense PBI layers with highly conductive mechanically supporting layers, either by lamination or loose stacking. While gel‐PBI is very soft and conductive, the shadow effect of the non‐conductive pore walls of porous supports adds resistance. In this work, these issues are addressed by coating a 25 µm thick highly conductive sulfonated polystyrene layer (S) with a 1 µm thin selective PBI layer (P) to block vanadium crossover. To reduce the number of potential defects, two bilayer membranes can be stacked. A 52 µm thick stack of two membranes (PS–SP, PBI faces the electrodes) shows an area‐specific resistance of 144.8 mΩ cm2 in VO2+‐containing electrolyte and a permeability of 6.85 × 10−14 m2 s−1, both lower than the values for Nafion 212. A VRFB cell test over 3500 charging cycles (1660 h) with an energy efficiency of up to 88.5% at 100 mA cm−2 is shown. Performance losses are reversed by electrolyte rebalancing. With material costs of 1.84 USD m−2, the PSSP(1‐25‐25‐1) membrane promises high performance at low costs.
Molecular‐Level Design of High Flash Point Solvents Enables High‐Safety and Dual‐Function Chemical Presodiation of Hard Carbon and Alloy Anodes for High‐Performance Sodium‐Ion Batteries
Authors: Man Quanyan , Wei Chuanliang , Tian Kangdong , Shen Hengtao , Zhang Xinlu , Bai Xuexiu , Xi Baojuan , Xiong Shenglin , Feng Jinkui 
Published: April 2024

AbstractHard carbon (HC) is subjected to low initial Coulombic efficiency (ICE) and unsteady solid electrolyte interphase (SEI), which limits the energy density and cycling performance. Meanwhile, studies related to emerging chemical presodiation have specifically focused on proper redox potential and overlooked its safety hazard. To address these drawbacks of HC and chemical presodiation, a series of high‐safety chemical presodiation solutions based on tetraethylene glycol dimethyl ether (TEGDME) are proposed for uniform and fast presodiation of HC and Bi anodes. Among them, Na‐4‐methylbiphenyl in TEGDME solution exhibits the lowest redox potential (0.146 V vs Na+/Na), which achieves the inhibition of initial irreversible sodium uptake. Meantime, the potential‐driven decomposition of fluoroethylene carbonate endows presodiated HC (pNa‐HC) a fast‐ion conducting and robust F‐rich SEI. Accordingly, pNa‐HC delivers an ideal ICE of 99.1% compared to HC (65.28%). Meanwhile, pNa‐HC exhibits significantly enhanced rate performance and cycling life (193.39 mAh g−1 after 2300 cycles at 1000 mA g−1) benefiting from reduced kinetic energy barriers. When pNa‐HC pairs with Na3V2(PO4)3 cathode, the full cell demonstrates a desirable ICE of 91.25%. This work provides a novel and universal solvent design strategy to realize high‐safety chemical pre‐metallation.
Ruthenium Single Atomic Sites Surrounding the Support Pit with Exceptional Photocatalytic Activity
Authors: Tao Yu , Guan Jianping , Zhang Jian , Hu Shouyao , Ma Runze , Zheng Huanran , Gong Jiaxin , Zhuang Zechao , Liu Shoujie , Ou Honghui , Wang Dingsheng , Xiong Yu 
Published: April 2024

AbstractSingle‐metal atomic sites and vacancies can accelerate the transfer of photogenerated electrons and enhance photocatalytic performance in photocatalysis. In this study, a series of nickel hydroxide nanoboards (Ni(OH)x NBs) with different loadings of single‐atomic Ru sites (w‐SA‐Ru/Ni(OH)x) were synthesized via a photoreduction strategy. In such catalysts, single‐atomic Ru sites are anchored to the vacancies surrounding the pits. Notably, the SA‐Ru/Ni(OH)x with 0.60 wt % Ru loading (0.60‐SA‐Ru/Ni(OH)x) exhibits the highest catalytic performance (27.6 mmol g−1 h−1) during the photocatalytic reduction of CO2 (CO2RR). Either superfluous (0.64 wt %, 18.9 mmol g−1 h−1; 3.35 wt %, 9.4 mmol−1 h−1) or scarce (0.06 wt %, 15.8 mmol g−1 h−1; 0.29 wt %, 21.95 mmol g−1 h−1; 0.58 wt %, 23.4 mmol g−1 h−1) of Ru sites have negative effect on its catalytic properties. Density functional theory (DFT) calculations combined with experimental results revealed that CO2 can be adsorbed in the pits; single‐atomic Ru sites can help with the conversion of as‐adsorbed CO2 and lower the energy of *COOH formation accelerating the reaction; the excessive single‐atomic Ru sites occupy vacancies that retard the completion of CO2RR.
Differential Substrate Sensing in Terpene Synthases from Plants and Microorganisms: Insight from Structural, Bioinformatic, and EnzyDock Analyses
Authors: Schwartz Renana , Zev Shani , Major Dan T. 
Published: April 2024

AbstractTerpene synthases (TPSs) catalyze the first step in the formation of terpenoids, which comprise the largest class of natural products in nature. TPSs employ a family of universal natural substrates, composed of isoprenoid units bound to a diphosphate moiety. The intricate structures generated by TPSs are the result of substrate binding and folding in the active site, enzyme‐controlled carbocation reaction cascades, and final reaction quenching. A key unaddressed question in class I TPSs is the asymmetric nature of the diphosphate‐(Mg2+)3 cluster, which forms a critical part of the active site. In this asymmetric ion cluster, two diphosphate oxygen atoms protrude into the active site pocket. The substrate hydrocarbon tail, which is eventually molded into terpenes, can bind to either of these oxygen atoms, yet to which is unknown. Herein, we employ structural, bioinformatics, and EnzyDock docking tools to address this enigma. We bring initial data suggesting that this difference is rooted in evolutionary differences between TPSs. We hypothesize that this alteration in binding, and subsequent chemistry, is due to TPSs originating from plants or microorganisms. We further suggest that this difference can cast light on the frequent observation that the chiral products or intermediates of plant and bacterial terpene synthases represent opposite enantiomers.