bluuebunny/crossref_metadata_2025_split huggingface dataset:
A “Pre‐Division Metal Clusters” Strategy to Mediate Efficient Dual‐Active Sites ORR Catalyst for Ultralong Rechargeable Zn‐Air Battery
Authors: Zhao Yun‐Xiu , Wen Jing‐Hong , Li Ping , Zhang Peng‐Fang , Wang Su‐Na , Li Da‐Cheng , Dou Jian‐Min , Li Yun‐Wu , Ma Hui‐Yan , Xu Liqiang 
Published: January 2023

AbstractTo conquer the bottleneck of sluggish kinetics in cathodic oxygen reduction reaction (ORR) of metal‐air batteries, catalysts with dual‐active centers have stood out. Here, a “pre‐division metal clusters” strategy is firstly conceived to fabricate a N,S‐dual doped honeycomb‐like carbon matrix inlaid with CoN4 sites and wrapped Co2P nanoclusters as dual‐active centers (Co2P/CoN4@NSC‐500). A crystalline {CoII2} coordination cluster divided by periphery second organic layers is well‐designed to realize delocalized dispersion before calcination. The optimal Co2P/CoN4@NSC‐500 executes excellent 4e− ORR activity surpassing the benchmark Pt/C. Theoretical calculation results reveal that the CoN4 sites and Co2P nanoclusters can synergistically quicken the formation of *OOH on Co sites. The rechargeable Zn‐air battery (ZAB) assembled by Co2P/CoN4@NSC‐500 delivers ultralong cycling stability over 1742 hours (3484 cycles) under 5 mA cm−2 and can light up a 2.4 V LED bulb for ≈264 hours, evidencing the promising practical application potentials in portable devices.
Evaluierung und Verbesserung der Stabilität von Poly(ethylenoxid)‐basierten Festkörperbatterien mit Hochvoltkathoden
Authors: Yusim Yuriy , Trevisanello Enrico , Ruess Raffael , Richter Felix H. , Mayer Alexander , Bresser Dominic , Passerini Stefano , Janek Jürgen , Henss Anja 
Published: January 2023

AbstractFestkörperbatterien (Solid‐State‐Batteries, SSBs) mit Poly(ethylenoxid) (PEO) und Hochvoltkathodenaktivmaterialien (CAMs) wie LiNi1−‐x−yCoxMnyO2 (NCM) zeigen beim Zyklisieren oftmals “Spannungsrauschen”, was mit einem Zellversagen verbunden ist. Darüber hinaus finden sich in der Literatur ganz unterschiedliche Aussagen zur Langzeit‐Zyklenperformance von PEO in Kontakt mit Hochvolt‐CAMs. In der vorliegenden Arbeit wird experimentell nachgewiesen, dass das Spannungsrauschen tatsächlich durch Lithiumdendriten, die den festen Polymerelektrolyten (SPE) penetrieren, verursacht wird. Eine Lösung für dieses Problem kann die Verwendung von PEO mit einem höheren Molekulargewicht sein, was zu einer verbesserten Zyklenstabilität führt. Zusätzlich kann mittels Röntgenphotoelektronenspektroskopie (XPS) gezeigt werden, dass es an der Kathodenseite zur Bildung von oxidativen Degradationsprodukten nach dem Zyklisieren mit NCM als CAM kommt, was mittels der üblichen Fourier‐Transformations‐Infrarot‐Spektroskopie (FTIR) aufgrund ihrer begrenzten Oberflächensensitivität nicht nachgewiesen werden kann. Damit tragen unsere Ergebnisse dazu bei, nicht nur die Stabilität von PEO‐basierten SSBs besser bewerten zu können, sondern zeigen auch, dass durch die Wahl eines höhermolekularem PEOs die Stabilität gegenüber Hochvolt‐CAM signifikant gesteigert werden kann.
Fundamental Understanding of Electronic Structure in FeN4 Site on Electrocatalytic Activity via dz2‐Orbital‐Driven Charge Tuning for Acidic Oxygen Reduction
Authors: Li Xueli , Chen Tengge , Yang Bolong , Xiang Zhonghua 
Published: January 2023

AbstractThe structural diversity of active sites resulting from traditional pyrolysis hinder our understanding of the local coordination environment (LCE) around the active site, and its effects on performance in the oxygen reduction reaction (ORR). We created a series of FeN4 active‐site configurations via a pyrolysis‐free approach where LCEs are defined by covalent organic polymers (COPs). Our results suggest a more positive charge on iron atoms in the vicinity of an electron‐withdrawing side‐chain; that is, a high‐valence configuration (FeH+N4) that is achieved with a COPBTC@Cl‐CNTs catalyst subject to
‐orbital tuning. A new descriptor ξ, defined as the band center of iron atoms projected on the
‐orbital, was introduced to quantitively explain a volcano‐like regulation mechanism. When ξ is distributed between −1.887 and −1.862 eV, the catalytic performance of the COPBTC@Cl‐CNTs electrocatalyst is optimized.
Evaluation and Improvement of the Stability of Poly(ethylene oxide)‐based Solid‐state Batteries with High‐Voltage Cathodes
Authors: Yusim Yuriy , Trevisanello Enrico , Ruess Raffael , Richter Felix H. , Mayer Alexander , Bresser Dominic , Passerini Stefano , Janek Jürgen , Henss Anja 
Published: January 2023

AbstractSolid‐state batteries (SSBs) with high‐voltage cathode active materials (CAMs) such as LiNi1−x−yCoxMnyO2 (NCM) and poly(ethylene oxide) (PEO) suffer from “noisy voltage” related cell failure. Moreover, reports on their long‐term cycling performance with high‐voltage CAMs are not consistent. In this work, we verified that the penetration of lithium dendrites through the solid polymer electrolyte (SPE) indeed causes such “noisy voltage cell failure”. This problem can be overcome by a simple modification of the SPE using higher molecular weight PEO, resulting in an improved cycling stability compared to lower molecular weight PEO. Furthermore, X‐ray photoelectron spectroscopy analysis confirms the formation of oxidative degradation products after cycling with NCM, for what Fourier transform infrared spectroscopy is not suitable as an analytical technique due to its limited surface sensitivity. Overall, our results help to critically evaluate and improve the stability of PEO‐based SSBs.
Rapid gelation of dual physical network hydrogel with ultra‐stretchable, antifreezing, moisturing for stable and sensitive response
Authors: Zhang Yuxia , Li Qinglin , Chen Jiawen , Zheng Yanyan , Lu Xiaoyu , Chen Qinhui 
Published: January 2023

AbstractDual physical network hydrogel possesses robust energy dissipation mechanism. However, the demanding conditions of the second monomer radical polymerization aren't benefit for the dispersion of conductive filler. Moreover, the stable and sensitive response under extreme environment puts forward the requirements for mechanical, antifreezing and moisture retention properties. Herein, a dual physical networks hydrogel (polyacrylic acid‐chitosan‐graphene/glycerol, noted as PAA‐CS‐G/Gly) was prepared rapidly (<0.5 h) without chemical cross‐linking agents at room temperature. The rapid gelation, ionic coordination of Ag+ together with certain viscosity chitosan promoted the dispersion of graphene. PAA‐CS‐G/Gly showed ultra‐stretchable properties (~2500%), good toughness (3.11 MJ/m3), breaking strength (0.27 MPa) and fatigue resistance. PAA‐CS‐G/Gly had good adhesion properties, outstanding tolerance for freezing (−80°C) and moisture retention. More importantly, PAA‐CS‐G/Gly strain sensor had excellent sensitivity (GF, up to 9.449) at 300% ~ 900% strain. It could sensitively detect human joint movements and even subtle activities such as talking and swallowing. PAA‐CS‐G/Gly hydrogel is expected to adhere directly to the human body for flexible monitoring of human size movement under extreme environmental conditions.
High‐performance nano‐TiO2@polyvinylidene fluoride composite separators prepared by electrospinning for safe lithium‐ion battery
Authors: Li Datuan , Gao Xingxu , Cao Min , Sheng Lei , Yang Ling , Xie Xin , Gong Yun , Hu Qingyang , Xie Qiangqiang , Wang Tao , He Jianping , Huang Xianli 
Published: January 2023

AbstractTraditional polyolefin separators cannot guarantee safety for lithium‐ion batteries at high temperature due to their low melting point, especially for high power discharge. Therefore, it is imperative to develop separators with excellent thermal stability. In this paper, we have prepared TiO2 modified PVDF composite separators by electrospinning. When compared with commercial PE separators, this kind of composite separators show superior thermal stability at 160°C. In addition, it is found that the 0.5‐TiO2@PVDF separator exhibits excellent flame retardant and optimal tension strength. Meanwhile, the 0.5‐TiO2@PVDF separator exhibits ideal liquid electrolyte storage capacity, which improves the ionic conductivity (0.68 mS cm−1). As a result, the LiCoO2||Li cells with 0.5‐TiO2@PVDF separator have high discharge capacity retention rate at a current density of 1 C (300 cycles) and excellent rate performance (1.75 mAh at 5 C). In short, nano‐TiO2 modified PVDF separator has a great application prospect in high‐performance and high‐safety lithium‐ion batteries.
Multilayer structural analysis and application of overlap structure for cord–rubber composite
Authors: Liu Shouyao , Wu Jian , Luo Hang , Yang Jishen , Wu Yuanyuan , Su Benlong , Wang Youshan 
Published: January 2023

AbstractAs an advanced composite material with a flexible structure, cord–rubber composite has the advantages of high strength, high modulus, and lightweight, widely used in aerospace and other fields. Compared with our previous work, we focus on the effects of three kinds of overlap structures (positive–positive, positive–invert, concave–convex) on the mechanical properties of cord–rubber composites through uniaxial tensile tests and finite element simulation. When the interlaced distance is 5 mm, the concave–convex overlap structure reaches the maximum tensile strength (74.79 MPa). With the increased interlaced distance, the failure form of the cord rubber composite gradually transfers from the overlap end to the interface slip and fixture end. The maximum Von Mises stress distribution of cord–rubber composite flexible support tends to be uniform through rational design by the mechanical characteristics of the three kinds of overlap structures.
Terahertz Spectral Signatures of Ultrafast Spin Transports in Ferromagnetic Heusler Alloy
Authors: Jin Zuanming , Guo Yingyu , Peng Yan , Zhang Zeyu , Pang Jinyi , Zhang Zongzhi , Liu Fan , Ye Bin , Jiang Yexin , Ma Guohong , Zhang Chao , Balakin Alexey V. , Shkurinov Alexander P. , Zhu Yiming , Zhuang Songlin 
Published: January 2023

AbstractAlthough the Co‐based Heusler compounds are predicted to be half‐metals, their sub‐picosecond demagnetization dynamics upon laser excitation show a transition‐metal‐like behavior. Any possible role of ultrafast nonlocal spin transport on the ultrafast demagnetization of half‐metallic Heusler compounds has only been inferred indirectly by time‐resolved magneto‐optical Kerr effect. Here, an ultrafast optically driven spin current traveling from Co2FeSi half metal into an adjacent Pt layer by using terahertz (THz) emission time‐domain spectroscopy (TDS) is demonstrated. By varying the magnetic field and excitation symmetry, the sizable THz generation from Co2FeSi/Pt stack arises from optically induced spin transport across the Co2FeSi/Pt interface in conjunction with spin‐to‐charge current conversion, via the inverse spin Hall effect (ISHE). The chemical ordering, interface roughness and magnetization of the samples become vital to engineer the THz emission properties. The amplitude of THz emission is comparable to that of CoFeB/Pt stack, thereby indicating Co2FeSi as an efficient ultrafast light‐driven spin current injector. Finally, by varying the pumping energy, the contributions are distinguished to the ultrafast spin current from thermalization and optical excitation of majority spins in Heusler alloy. This work illustrates THz emission TDS as a powerful tool to investigate the ultrafast spintronic properties of Heusler alloy/normal‐metal bilayers.
Advances in the Synthesis of Chemically Recyclable Polymers
Authors: Li Xin‐Lei , Ma Kai , Xu Fei , Xu Tie‐Qi 
Published: January 2023

AbstractThe development of modern society is closely related to polymer materials. However, the accumulation of polymer materials and their evolution in the environment causes not only serious environmental problems, but also waste of resources. Although physical processing can be used to reuse polymers, the properties of the resulting polymers are significantly degraded. Chemically recyclable polymers, a type of polymer that degrades into monomers, can be an effective solution to the degradation of polymer properties caused by physical recycling of polymers. The ideal chemical recycling of polymers, i. e., quantitative conversion of the polymer to monomers at low energy consumption and repolymerization of the formed monomers into polymers with comparable properties to the original, is an attractive research goal. In recent years, significant progress has been made in the design of recyclable polymers, enabling the regulation of the “polymerization‐depolymerization” equilibrium and closed‐loop recycling under mild conditions. This review will focus on the following aspects of closed‐loop recycling of poly(sulfur) esters, polycarbonates, polyacetals, polyolefins, and poly(disulfide) polymer, illustrate the challenges in this area, and provide an outlook on future directions.
Iodine‐Catalyzed Claisen‐Rearrangements of Allyl Aryl Ethers and Subsequent Iodocyclizations
Authors: Arndt Thiemo , Raina Abhinav , Breugst Martin 
Published: January 2023

AbstractIodine can be considered as the simplest halogen‐bond donor. Previous investigations have revealed its remarkable catalytic effect in various reactions. The catalytic activity of iodine can often even compete with that of traditional Lewis acids. So far, iodine was typically used to activate carbonyl derivatives like Michael acceptors. We now demonstrate that iodine can also be used to activate allyl aryl ethers in Claisen rearrangements. The formed ortho‐allylic phenols rapidly undergo iodocyclizations to afford dihydrobenzofurans, which are important building blocks for medicinal applications. A comparison with different catalysts further highlights the potential of iodine catalysis for this reaction. Computational and mechanistic investigations provide deeper insights into the underlying non‐covalent interactions and their role for the catalysis.
Quantified analysis of facial movement: A reference for clinical applications
Authors: Sarhan François‐Régis , Olivetto Matthieu , Ben Mansour Khalil , Neiva Cécilia , Colin Emilien , Choteau Baptiste , Marie Jean‐Paul , Testelin Sylvie , Marin Frédéric , Dakpé Stéphanie 
Published: January 2023

AbstractMost techniques for evaluating unilateral impairments in facial movement yield subjective measurements. The objective of the present study was to define a reference dataset and develop a visualization tool for clinical assessments. In this prospective study, a motion capture system was used to quantify facial movements in 30 healthy adults and 2 patients. We analyzed the displacements of 105 reflective markers placed on the participant's face during five movements (M1–M5). For each marker, the primary endpoint was the maximum amplitude of displacement from the static position (M0) in an analysis of variance. The measurement precision was 0.1 mm. Significant displacements of markers were identified for M1–M5, and displacement patterns were defined. The patients and age‐matched healthy participants were compared with regard to the amplitude of displacement. We created a new type of radar plot to visually represent the diagnosis and facilitate effective communication between medical professionals. In proof‐of‐concept experiments, we collected quantitative data on patients with facial palsy and created a patient‐specific radar plot. Our new protocol for clinical facial motion capture (“quantified analysis of facial movement,” QAFM) was accurate and should thus facilitate the long‐term clinical follow‐up of patients with facial palsy. To take account of the limitations affecting the comparison with the healthy side, we created a dataset of healthy facial movements; our method might therefore be applicable to other conditions in which movements on one or both sides of the face are impaired. The patient‐specific radar plot enables clinicians to read and understand the results rapidly.
Strategies for organ preservation: Current prospective and challenges
Authors: Tripathy Seema , Das Saroj Kumar 
Published: January 2023

AbstractIn current therapeutic approaches, transplantation of organs provides the best available treatment for a myriad of end‐stage organ failures. However, shortage of organ donors, lacunae in preservation methods, and lack of a suitable match are the major constraints in advocating this life‐sustaining therapy. There has been continuous progress in the strategies for organ preservation since its inception. Current strategies for organ preservation are based on the University of Wisconsin (UW) solution using the machine perfusion technique, which allows successful preservation of intra‐abdominal organs (kidney and liver) but not intra‐thoracic organs (lungs and heart). However, novel concepts with a wide range of adapted preservation technologies that can increase the shelf life of retrieved organs are still under investigation. The therapeutic interventions of in vitro‐cultured stem cells could provide novel strategies for replacement of nonfunctional cells of damaged organs with that of functional ones. This review describes existing strategies, highlights recent advances, discusses challenges and innovative approaches for effective organ preservation, and describes application of stem cells to restore the functional activity of damaged organs for future clinical practices.
Improved left atrial appendage closure procedural efficiency using radiofrequency transseptal wire system
Authors: Whitler Cameron , McClellan Brittni , Patel Harshil , Rajpurohit Dhruv , Kalaba Frank , Kado Herman , David Shukri , Shah Dipak 
Published: January 2023

AbstractObjectiveThe radiofrequency (RF) needle has been shown to improve transseptal puncture efficiency and safety compared to mechanical needles. This study aimed to investigate the use of VersaCross RF transseptal wire system (Baylis Medical) to improve procedural efficiency of left atrial appendage closure (LAAC) compared to the standard RF needle‐based workflow.MethodsEighty‐one LAAC procedures using WATCHMAN FLX were retrospectively analyzed comparing the standard RF needle‐based workflow to a RF wire‐based workflow. Study primary endpoint was time to WATCHMAN device release, and secondary endpoints were transseptal puncture time, LAAC success, fluoroscopy use, and procedural complications.ResultsTwenty‐five cases using standard RF needle‐based workflow were compared to 56 cases using the RF wire‐based workflow. Baseline patient characteristics were similar between both groups. LAAC was successful in all patients with no differences in intraprocedural complication rates (p = 0.40). Transseptal puncture time was 1.3 min faster using the RF wire‐based workflow compared to the standard RF needle‐based workflow (6.5 ± 2.3  vs. 7.8 ± 2.3 min, p = 0.02). Overall, time to final WATCHMAN device release was 4.5 min faster with the RF wire‐based workflow compared to the RF needle‐based workflow (24.6 ± 5.6 vs. 29.1 ± 9.6 min, p = 0.01). Fluoroscopy time was 21% lower using the RF wire‐based workflow (7.6 ± 2.8 vs. 9.6 ± 4.4 min; p = 0.05) and fluoroscopy dose was 67% lower (47.1 ± 35.3 vs. 144.9 ± 156.9 mGy, p = 0.04) and more consistent (F‐test, p ˂ 0.0001).ConclusionsThe RF wire‐based workflow streamlines LAAC procedures, improving LAAC efficiency and safety by reducing fluoroscopy, device exchanges, and delivery sheath manipulation.
Nickel Catalyzed Alkylation of Oxindoles with Alkyl Alcohols
Authors: Ghosh Adrija , Bera Atanu , Banerjee Debasis 
Published: January 2023

AbstractHerein, a simple and efficient nickel‐catalyzed C‐3‐selective alkylation of 2‐oxindoles using primary alkyl and allylic alcohols have been demonstrated. The catalytic protocol enables transformations in the presence of free hydroxyl group, amine, cycloalkanes, olefins, and lactam including more challenging C2‐C4 alcohols, citronellol and oleic acid derived alcohol in up to 96 % yield. Initial mechanistic studies and deuterium labelling experiments were performed. Synthetic modulations of the lactam enabled new routes for the synthesis of C‐3‐substituted indoles, indolines, and un‐symmetric urea derivatives.
La distance psychologique en sciences de gestion: Apports et limites de la théorie des niveaux de représentation
Authors: Didi Alaoui Mohamed 
Published: January 2023

AbstractThis article explains how construal level theory (CLT) expand knowledge of management sciences related to the effect of psychological distance on the organization's stakeholders. This work also highlights different limits of this framework and sets out a research agenda to overcome them. The main limits concern 1) a lack of precision regarding the modification of construal level as a function of psychological distance; 2) a prevalence of research on temporal and social distance to retranscribe the effects of a psychological distance theorized as a global concept; 3) numerous inconsistencies regarding multiple distances. Managerial implications are also suggested to handle the psychological distance of the stakeholders.
Emission‐Tunable Nanofluorophores through Self‐assembly of Amphiphilic Block Copolymers: toward Application in Cell Imaging
Authors: Zhang Shensong , Qi Shuang , He Xiongfei , Xu Pan , Song Bo 
Published: January 2023

Comprehensive SummaryNanofluorophores based on aggregation‐induced emission (AIE) dyes have recently received considerable attention because of their unique optical properties and biocompatibility. In this work, we report an emission‐tunable nanofluorophore constructed by the self‐assembly of an amphiphilic block copolymer (denoted by PTN). The diblock copolymer was synthesized by RAFT polymerization. A polyethylene glycol‐based trithiocarbonate was employed as the macromolecular chain transfer agent, and a near‐infrared emitting tetraphenylethylene derivative with a vinyl terminal group was designed as the monomer. The block copolymers self‐assembled in an aqueous solution to form nanospheres, which showed near‐infrared emission at approximately 720 nm with a significant Stokes shift of approximately 260 nm. Furthermore, nanofluorophores have excellent biocompatibility, photostability, and pH‐independent emission‐tunable properties, and were successfully applied to label HeLa cells for fluorescence imaging.
Regression model selection via log‐likelihood ratio and constrained minimum criterion
Authors: Tsao Min 
Published: January 2023

AbstractAlthough log‐likelihood is widely used in model selection, the log‐likelihood ratio has had few applications in this area. We develop a log‐likelihood ratio based method for selecting regression models by focusing on the set of models deemed plausible by the likelihood ratio test. We show that when the sample size is large and the significance level of the test is small, there is a high probability that the smallest model in this set is the true model; thus, we select this smallest model. The significance level of the test serves as a tuning parameter of this method. We consider three levels of this parameter in a simulation study and compare this method with the Akaike information criterion (AIC) and Bayesian information criterion (BIC) to demonstrate its excellent accuracy and adaptability to different sample sizes. This method is a frequentist alternative and a strong competitor to AIC and BIC for selecting regression models.
Learning about the concept of critical raw materials in chemistry teaching by a digital learning environment
Authors: Bütow Jana‐Christin , Eilks Ingo 
Published: January 2023

AbstractDie Wirtschaft eines jeden Landes ist abhängig von der Versorgung mit Rohstoffen. Einige dieser Rohstoffe sind aber selten oder auf der Erde sehr ungleichmäßig verteilt. Dies führt zu einem Versorgungsrisiko, das mit dem Konzept der kritischen Rohstoffe beschrieben wird. Die Europäische Union (EU) analysiert dies und veröffentlicht alle drei Jahre eine Liste mit Rohstoffen, die kritisch für die Wirtschaft in der EU sind. Da eine funktionierende Wirtschaft auch Teil einer nachhaltigen Entwicklung ist, wird hier vorgeschlagen, mithilfe einer digitalen Lernumgebung einmal explizit über das Konzept der kritischen Rohstoffe zu lernen. Erste Erfahrungen aus dem Unterricht werden berichtet.