bluuebunny/crossref_metadata_2025_split huggingface dataset:
Hydrophobic Thin Layers Based on N‐Coordinated Metallaboroxine Polymers
Authors: Novák Miroslav , Srb Michael , Schwarz Jiří , Růžičková Zdeňka , Bouška Marek , Podzimek Štěpán , Ruleová Pavlína , Jambor Roman 
Published: December 2024

ABSTRACTThe reaction of organogallium amide LGa(NEt2)2 (1) and organotin carbonate L(Ph)SnCO3 (2), where L = 2,6‐(Me2NCH2)2C6H3, with organoboronic acids RB(OH)2 yielded molecular gallium‐ and stannaboroxines LM(O3B2R2) (3–8) (3: M = Ga, R = 4‐tBu‐C6H4; 4: M = Ga, R = 4‐CF3‐C6H4; 5: M = Ga, R = 3,5‐(CF3)2‐C6H3; 6: M = PhSn, R = 4‐tBu‐C6H4; 7: M = PhSn, R = 4‐CF3‐C6H4; 8: M = PhSn, R = 3,5‐(CF3)2‐C6H3). The Lewis acidity of boron atom (especially in 8) allowed to form N → B coordination bond with bases such as 4‐Me2N‐pyridine (DMAP) or poly(4‐vinylpyridine‐co‐styrene) (PVPS) yielding new compounds DMAP→8 (9) and PVPS→8 (10). The good film forming properties of 10 allowed the deposition of transparent thin layers by spin‐coating method and the determination of their hydrophobic properties by the sessile drop method. The study of hydrophobicity was subsequently focused on the content of stannaboroxine 8 in PVPS and on the concentration influence of the deposited PVPS:8 mixture solution. The parameters of thin layers such as thickness, transparency, and roughness were also determined.
Preparation of High Mechanical Performance Polyimides by Microbranched Cross‐Linked Structures
Authors: He Xiansheng , Xu Mingkun , Dou Qian , Li Yanhui , Wang Qihua , Wang Tingmei , Tao Liming 
Published: December 2024

ABSTRACTTo improve the modulus and tensile strength of polyimide films, this study utilized diamines with amide bonds as monomers, introducing hydrogen bonding into the material. Additionally, a microbranched cross‐linked structure was created by incorporating a triamino compound, and its effect on film properties was analyzed. The results showed that the microbranched cross‐linked structure and amide bonding significantly improved the storage modulus, tensile strength, shape memory properties, and toughness of the polyimide films. Specifically, at 2% concentration of 1,3,5‐tris(4‐aminophenoxy)benzene, the storage modulus of the polyimide films reached 12.97GPa, the tensile strength was 243 MPa, the elongation at break was 5.58%, and the toughness was improved by 2.59 times. At this concentration, the shape fixation rate of normal polyimide was 96.7%, and the shape recovery rate was 92%. These findings suggest that the modified polyimide films exhibit high strength and are suitable for applications in high‐temperature environments.
Degradation of Low‐Concentration Perfluoroalkyl Substances With a Nonthermal Gas–Liquid Plasma Reactor
Authors: Jenks Lauren Rene , Bulusu Radha Krishna Murthy , Gallan Rachel , Wandell Robert , Tang Youneng , Locke Bruce R. 
Published: December 2024

ABSTRACTA continuous gas–liquid flowing film reactor with nanosecond pulsed power, where plasma channels generated in argon propagate along the gas–liquid interface, was utilized to degrade aqueous solutions of perfluoroalkyl substances (PFAS). Perfluorooctanoic acid (PFOA) yielded maximum percentage degradations of 81.6% and 76.5% for the low (98 ± 29 ppt) and high (300 ± 30 ppt) concentrations, respectively, at 2 mL/min liquid flow and a pulse repetition frequency of 0.5 to 2 kHz. A mixture of perfluorocarboxylic acids (PFCAs) and perfluoroalkane sulfonic acids (PFSAs) was also degraded. Sequential multi‐pass treatments of PFOA with an initial concentration of 413 ± 142 ppt using 2 kHz resulted in 84.3% degradation in the first pass and no PFOA was detected after additional passes.
SUPERMAGO: Protein Function Prediction Based on Transformer Embeddings
Authors: de Oliveira Gabriel Bianchin , Pedrini Helio , Dias Zanoni 
Published: December 2024

ABSTRACTRecent technological advancements have enabled the experimental determination of amino acid sequences for numerous proteins. However, analyzing protein functions, which is essential for understanding their roles within cells, remains a challenging task due to the associated costs and time constraints. To address this challenge, various computational approaches have been proposed to aid in the categorization of protein functions, mainly utilizing amino acid sequences. In this study, we introduce SUPERMAGO, a method that leverages amino acid sequences to predict protein functions. Our approach employs Transformer architectures, pre‐trained on protein data, to extract features from the sequences. We use multilayer perceptrons for classification and a stacking neural network to aggregate the predictions, which significantly enhances the performance of our method. We also present SUPERMAGO+, an ensemble of SUPERMAGO and DIAMOND, based on neural networks that assign different weights to each term, offering a novel weighting mechanism compared with existing methods in the literature. Additionally, we introduce SUPERMAGO+Web, a web server‐compatible version of SUPERMAGO+ designed to operate with reduced computational resources. Both SUPERMAGO and SUPERMAGO+ consistently outperformed state‐of‐the‐art approaches in our evaluations, establishing them as leading methods for this task when considering only amino acid sequence information.
Paraffin Wax–Expanded Graphite Composite Phase Change Materials With Enhancing Thermal Conductivity and Thermal Stability for Thermal Energy Storage
Authors: Li Yufeng , Yan Huang , Yang Fan , Li Shuang , Jiang Chongwen , Xie Le 
Published: December 2024

AbstractPW–EG composite phase change materials (CPCMs) with varying expanded graphite (EG) mass fractions were prepared by vacuum adsorption, using EG as the matrix and paraffin wax (PW) as the phase change material (PCM). The optimal addition amount of EG was determined to be 20 wt% based on the enthalpy change and leakage performance of the CPCMs. At this optimal composition, the thermal conductivity of CPCM enhanced significantly from 0.348 to 6.003 W/(m·K). SEM analysis revealed effective adsorption of PW within the pores of EG, reducing the leakage rate of PW to below 2.0%. The DSC results showed that the melting temperature and solidification temperature of CPCM were 36.3 °C and 40.80 °C, respectively, with the corresponding latent heat of 113.2 J/g and 106.6 J/g, respectively. FT‐IR and XRD results confirmed that the interactions of PW and EG were primarily due to capillary action, demonstrating excellent chemical compatibility. The TG test results showed that using EG may improve heat resistance of PW, increasing the heat resistance limit temperature from 110 to 142 °C. After 200 thermal cycles, the CPCM exhibited satisfactory thermal properties, excellent structural integrity, and thermal stability, which will provide a great potential of PCM for thermal energy storage applications.
Direct Preparation of Ultrathin Polymer Membranes on Porous Substrates for the Separation of Helium From Methane
Authors: Wang Jialin , Ding Yehui , He Meng , Ding Xiangdong , Liu Xue , Shi Weiqun 
Published: December 2024

AbstractUltrathin polymer membranes on porous substrates exhibit excellent gas and ion permeability and have important applications in many fields, such as membrane separation and batteries. However, there is still a lack of facile and general methods for the direct preparation of ultrathin polymer membranes on porous substrates, especially from polymer solutions. Within this work, a new strategy to fabricate centimeter‐size ultrathin polymer membranes (thickness down to 16 nm) is presented directly on porous supports by using the liquid‐liquid interfacial spin‐coating technique. The method allows the preparation of ultrathin polymer membranes with a wide range of polymers, and the membranes are smooth and intact without cracks. The helium/methane separation performance is evaluated. As the membrane thickness increased from 40 to 180 nm, the He/CH4 selectivity increased and then decreased. The ultrathin membrane provides a good He/CH4 selectivity of 8.8 and He permeance of 1 × 105 GPU, which is the highest value reported so far and more than 150 times higher than that of membranes with He/CH4 selectivity above eight in the literature. This new approach provides the possibility to explore the great potential of ultrathin membranes for separation.
Dual‐Substitution Strategy Utilizing Cation Chelation and Assembly Process to Realize Solid Solution Reaction in Layered Oxide Cathode for Na‐Ion Batteries
Authors: Huang Zhijian , Tan Mingpei , Liu Ming , Hua Yukai , Liu Yong 
Published: December 2024

AbstractNa0.67Ni0.33Mn0.67O2 (NNM) is regarded as a promising cathode material for Na‐ion batteries (NIBs), but suffers from irreversible phase transformations characterized by multiple voltage plateaus, resulting in poor cycle stability and inferior rate capability. To address these issues, the Na0.67Ni0.18Cu0.10Zn0.05Mn0.67O2 (NNCZM) cathode material is synthesized by a cation chelation and reassembly process, which can promote a more uniform element distribution than that prepared by the solid‐state method (S‐NNCZM), resulting in better Na+ diffusion kinetics and rate capability. Replacing Ni2+ with a small amount of Zn2+ prevents the P2‐O2 phase transformation, while replacing Ni2+ with an appropriate amount of electrochemically active Cu2+ eliminates Na‐vacancy ordering and additionally contributes to capacity. Thus, the dual substitution of Cu2+ and Zn2+ for Ni2+ makes the NNCZM electrode synergistically achieve a complete solid solution reaction and better cycling stability. Accordingly, it exhibits a large discharge capacity (110.2 mA h g−1 at 10 mA g−1) with a high initial coulombic efficiency (97.3%), remarkable cycle stability with 84.1% capacity retention over 200 cycles at 200 mA g−1, and excellent rate capability with a discharge capacity of 61.0 mA h g−1 at 2000 mA g−1, significantly outperforming the NNM and S‐NNCZM electrodes.
Improving Performance of Perovskite Solar Cells by Reducing Energetic Disorder of Hole Transport Polymer
Authors: Luo Xuanang , Yin Sen , Xiong Zhihui , Qian Guimeng , Lin Youran , Li Ning , Ying Lei 
Published: December 2024

AbstractPolymer hole transport materials offer significant efficiency and stability advantages for p–i–n perovskite solar cells. However, the energetic disorder of amorphous polymer hole transport materials not only limits carrier transport but also impedes contact between the polymer and perovskite, hindering the formation of high crystalline quality perovskites. Herein, a novel low energetic disordered polymer hole transport material, PF8ICz, featuring an indeno[3,2‐b]carbazole unit with extended π‐conjugation is designed and synthesized. Analyses based on both theoretical calculations and experimental validation highlight the advantages of PF8ICz as a low energetic disorder polymer hole transport material for perovskite solar cells, including improved carrier transport, enhanced perovskite affinity/passivation, and optimized energy levels. Perovskite films formed atop PF8ICz exhibit superior crystalline quality and improved exciton dynamics. PF8ICz‐based perovskite solar cells achieve remarkable power efficiency (PCE > 25.4%) and outstanding stability (retaining 96.2% and 95.0% of their PCE under the ISOS‐D‐3 and ISOS‐L‐3 protocols over 1000 h, respectively). These findings underscore the importance of rational design of hole transport materials, contributing to the development of high‐performance, stable perovskite solar cells for sustainable energy solutions.
Air‐Drying for Rapid Manufacture of Flexible Aramid Nanofiber Aerogel Fibers with Robust Mechanical Properties and Thermal Insulation in Harsh Environments
Authors: Cheng Yajie , Cheng Hongli , Gao Jin , Xue Yajun , Han Gaojie , Zhou Bing , Liu Chuntai , Feng Yuezhan , Shen Changyu 
Published: December 2024

AbstractAerogel fibers uniting characteristics of both aerogels (lightweight and porosity) and fibers (flexibility and wearability) exhibit a great potential for the production of the next generation of thermal protection textiles; still, the complex drying procedures and mechanical brittleness remain the main obstacles toward further exploitation. Herein, flexible and robust aramid nanofiber aerogel fibers (ANAFs) are scalably prepared by continuous wet‐spinning coupled with fast air‐drying. This synthesis involves calcium ions (Ca2⁺) cross‐linking and solvent displacement by low surface tension solvents, to enhance skeleton strength and reduce the capillary force during evaporation, respectively, thus minimizing shrinkage to 29.0% and maximizing specific surface area to 225.0 m2 g−1 for ANAF. Surprisingly, the air‐dried ANAF showed excellent tensile strength (13.5 MPa) and toughness (7.0 MJ m−3), allowing their easy weaving into the textile without damage. Importantly, the ANAF textile with a skin‐core porous structure exhibited low thermal conductivity (≈38.5 mW m−1 K−1) and excellent thermal insulation ability in the wide temperature range (−196 to 400 °C). Besides, the aramid molecular structure, as well as Ca2⁺ cross‐linking, endowed the ANAF with high thermal stability and flame retardancy. Consequently, the robust ANAF with a fast‐air‐drying method is promising for thermal protection in extreme environments, such as in spacesuits.
Iron as a Sulfidation‐Resistant Current Collector for Negative Electrode in Sulfide‐Based All‐Solid‐Batteries
Authors: Kim Hyejun , Lee Hyojoo , Kwon Gyeong Hyeon , Kim Jiyun , Jeong Daeboem , Jung Hun‐Gi , Bae Jong‐Seong , Shin Daiha , Cho Jiung , Kim Jung Ho , Kim Hyun‐seung , Mun Junyoung , Kwon Ohmin 
Published: December 2024

AbstractThe demand for all‐solid‐state batteries (ASSBs) featuring credible Li6PS5Cl argyrodite (LPSCl) electrolytes is increasing, driving interest in exploring suitable current collectors for ASSBs. Copper (Cu), used as a current collector in traditional lithium‐ion batteries, exhibits significant instability in LPSCl‐ASSBs. In this study, the effectiveness of iron (Fe) is systematically investigated as an alternative current collector in LPSCl‐ASSBs and compare its performance to that of Cu. Electrochemical analyses reveal that Cu undergoes unfavorable side reactions with LPSCl, forming copper sulfides and leading to pitting corrosion. In contrast, Fe, with its thick native oxide layer, effectively mitigates sulfide sub‐reactions, enhancing the stability of the current collector‐LPSCl electrolyte interface. Density function theory calculations and thermal tools using XRD and linear thermammetry confirm the higher stability of Fe with LPSCl compared to Cu. Replacing the Cu current collector with Fe significantly improves the long‐term stability of graphite‐based negative electrodes in ASSBs, achieving exceptional long cycleability exceeding 1000 cycles. These findings identify Fe as a promising current collector for ASSBs and provide valuable insights into the metal‐electrolyte interactions that govern the performance of these advanced battery systems.
Enhancing Electrochemical CO2 Reduction via Redox Non‐Innocent Spheres in Copper‐Coordinated Covalent Organic Frameworks
Authors: Liu Chang , Ding Yunxuan , Zhao Yilong , Yang Hao , Song Tao , Zhang Peili , Li Fei , Sun Licheng , Li Fusheng 
Published: December 2024

AbstractSignificant efforts have been dedicated to the development of highly efficient electrocatalysts for electrochemical CO2 reduction reactions (eCO2RR). The outer coordination spheres of catalytic centers may play a pivotal role in the reaction pathway and kinetics for eCO2RR. Herein, three single copper sites coordinated Aza‐fused conjugated organic frameworks (Aza‐COFs‐Cu) with different outer coordination spheres around Cu sites are designed. Experiment and density functional theory (DFT) calculation results reveal that the redox non‐innocent outer spheres around Cu sites significantly influence the catalytic performance of Aza‐COFs‐Cu for eCO2RR. When adjacent redox non‐innocent groups of uncoordinated aromatic‐N and quinone around the Cu centers act as the symmetry‐breaking sites, the energy‐consuming activation process of CO2 molecules can be accelerated via the H+/e− transfer process to form *COOH intermediates, which will significantly improve the performance for eCO2RR. This study provides a new perspective on the design of more advanced electrocatalysts for eCO2RR through redox non‐innocent spheres engineering.
Tunable Chiroptical Activity in Branched Ag@Au Nanoparticles with Molecular Chirality and Geometric Chirality
Authors: Liu Wenliang , Ju Xinfeng , Wang Yan , Fang Xiaoyu , Wang Dong , Wang Jiqian 
Published: December 2024

AbstractChiral plasmonic nanomaterials have attracted significant awareness due to their applications in chiral catalysis, biosensing, photonics, and separation. Constructing plasmonic core–shell nanomaterials with geometric chirality and desirable optical chirality is a crucial yet challenging task for extending the range of chiral plasmonic nanomaterials. Here, a two‐step method is reported for the synthesis of Gold (Au) branches wrapped silver (Ag) nanocubes (L/DBAg@Au) with strong and tunable circular dichroism (CD) signals under the regulation of L/D‐cysteine (L/D‐Cys). The Au branches consisted of multiple pinwheel‐like Au. Both experimental results and theoretical simulations have demonstrated that the CD signals of these structures originated from the synergism between molecular chirality and geometrical chirality. The CD signals in the visible region could be enhanced through coupling effects between Au and Ag. The CD signals and geometries evolved with the variations in Cys concentration, chiral molecule type, and incubation time. This work provides valuable insights to guide the rational design of plasmonic core–shell nanomaterials with geometric chirality.
Probing Photo‐Assisted Charge Storage Mechanism Using Bi‐Fe Perovskite Oxide Electrode for Solar Supercapacitor
Authors: Samtham Manopriya , Patil Ajay , Choudhary Ekta , Srivastava Himanshu , Jangir Ravindra , Choudhary Ram J. , Devan Rupesh S. 
Published: December 2024

AbstractIn this study, the rhombohedral crystalline pure phase BiFeO3 (BFO) of irregularly shaped spherical particles of ≈100 nm and energy bandgap of ≈2.31 eV are synthesized by sol–gel auto‐combustion method and explored as electrode material for photo‐assisted supercapacitor. The electronic structure studies revealed that the coexistence of heterovalent Bi and Fe elements accelerated the electrochemical redox kinetics and photo‐assisted charge storage properties. The resonant photoemission studies confirmed that near the Fermi level, the valence band spectra comprised the Fe3d and O2p hybridized states. The Fe‐O hybridized state felicitates the charge transfer transitions (O2p (h+) + hυ ↔ Fe3+ + e− ↔ Fe2+), which assists the intercalation/de‐intercalation process of OH− anions. Therefore, BFO has delivered 26.77% photo efficiency and the enhanced specific capacity of 21 Cg−1 at 2 Ag−1 in aq. 3m KOH under illumination, which is attributed to the accelerated photo‐generated charge carrier separation and storage with surface polarization effect. BFO also delivered capacitance retention of 77.5% even after 1000 continuous GCD cycles under visible light irradiation.
An Intersectional Approach to Emotion Labor and Language Teacher Identity: The Case of a Black American Woman Educator Teaching English Abroad in South Korea†
Authors: Maddamsetti Jihea , Hinton KaaVonia 
Published: December 2024

AbstractEmotion labor is so rooted in power structures of English learning and teaching that it pervades the everyday lives of language teachers and shapes their language teacher identities (LTIs). However, few studies have documented the emotion labor of Black women educators as they teach English abroad. Adopting an intersectional approach to emotion labor, this study addresses this gap by examining how one Black American woman educator, Kayla, engages in emotion labor to make sense of her LTIs over three years, teaching English in Korea. The analyses of the interview data show that Kayla's emotion labor regarding her intersectional positions (e.g., race, language, gender, nationality, age) encouraged her to reflect upon her overseas teaching experiences and search for avenues to navigate emotional job demands in the classroom and beyond, over time. Based on these findings, we conclude with implications for TESOL teacher education research and practice that considers using intersectionality to help all language teachers, and particularly those with intersectionally marginalized identities, to trace and understand the structures and history that bear upon their emotional and professional lives.
New method for extraction, identification, and quantification of non‐intentionally added substances in polystyrene
Authors: Pérocheau Arnaud Sacha , Michelet Véronique , Olivero Sandra , Navard Patrick , Combeaud Christelle , Mija Alice 
Published: December 2024

AbstractAn efficient one‐step extraction method was developed for the recovery of additives and non‐intentionally added substances (NIAS) from polystyrene, performed at room temperature for 2.33 h, without grinding to avoid fostering the formation of NIAS unrelated to polymer processing. Solvent use (39.2 mL/g) was greatly reduced compared with extraction conditions previously reported. The study of NIAS is analytically challenging but with high importance since their presence is a potential threat to human health and to the environment while reducing plastic potential recyclability. For an understanding of NIAS formation and influence of processing parameters, a systematic approach was taken, using virgin polystyrene mixed with known quantities of standard additives as model materials (Irganox_1076, Tinuvin_326, Irgafos_168). The degradation of one additive was identified by NMR and GC–MS. Precise multiple‐point quantification with internal standard was performed by GC–MS, measuring a 5.1 wt% Irgafos_168 degradation, with additives LOD ranging from 0.55–0.95 ppm. Evaluation of analytical challenges, such as matrix effects, was discussed and quantified. This method will help the quality control of virgin and recycled PS materials, including food contact ones, and improve the knowledge of PS processing impact on NIAS formation.
Taxis and Texture: Johann Daniel Major (1634–1693) on Spirits, Salts, and the Limits of Analysis
Authors: Keller Vera 
Published: December 2024

AbstractJohann Daniel Major (1634–1693) made taxis, a revocable ordering of units, the main subject of his lifelong research across all domains. He derived this concept from experiments in color changes in liquid solutions, an area of research that was especially vibrant in his cultural and intellectual milieu. Major drew on Cartesianism to query qualitative views of color and color change but he disagreed with rational Cartesians that reason could suffice to counteract the impact of original sin on knowledge. Due to the strife and sickness debilitating matter and human thought (itself highly conditioned by matter), Major remained skeptical that it was possible to identify the most basic building blocks of matter and thus focused more on synthesis and the complex textures it produced than upon analysis. Understanding had to remain provisional as experimental knowledge developed. Taxis provided Major the framework through which a dynamic array of knowledge could be co-articulated with a dynamic array of nature.