bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effective Liquid Electrolytes for Enabling Room‐Temperature Sodium–Sulfur Batteries
Authors: Marangon Vittorio , Barcaro Edoardo , De Boni Francesco , Prato Mirko , Bresser Dominic , Hassoun Jusef 
Published: July 2024

AbstractGlyme‐based electrolytes for sodium‐sulfur (Na–S) batteries are proposed for advanced cell configuration. Solutions of NaClO4 or NaCF3SO3 in tetraglyme are investigated in terms of thermal stability, ionic conductivity, Na+‐transference number, electrochemical stability, stripping‐deposition ability, and chemical stability in Na‐cells. Subsequently, versions of the electrolytes doped with fluoroethylene carbonate (FEC) are prepared using 0.5, 1, 2, or 3% additive weight concentrations, and evaluated by adopting the same approach used for the bare solutions. Scanning electron microscopy (SEM) provides morphological details of the passivation layer formed on the Na electrodes, while X‐ray photoelectron spectroscopy (XPS) sheds light on its composition. The most relevant achievement of the FEC‐added electrolyte is the suppression of the polysulfide shuttle in Na–S cells using a cathode with 70 wt.% of sulfur in the composite. This result appears even more notable considering the low amount of the additive requested for enabling the reversible cell operation. The solutions using 1% of FEC show the best compromise between cell performance and stability. Cyclic voltammetry (CV) displays the potential region related to the FEC electrochemical process responsible for Na–S cell operation. The understanding of the electrolyte features enables additional cycling tests using sulfur cathode with an optimized current collector, increased specific capacity, and coulombic efficiency.
Durable and High‐Performance Triboelectric Nanogenerator Based on an Inorganic Triboelectric Pair of Diamond‐Like‐Carbon and Glass
Authors: Li Wenjian , Lu Liqiang , Zhang Chi , Loos Katja , Pei Yutao 
Published: July 2024

AbstractThe long‐term durability of triboelectric nanogenerators (TENGs) remains a main challenge for practical applications because of inevitable material abrasion and wear, especially for sliding TENGs. Herein, an inorganic triboelectric pair composed of diamond‐like carbon (DLC) and glass with excellent durability and triboelectric output for sliding‐mode TENGs is proposed. This triboelectric pair possesses a low coefficient of friction and little abrasion and accordingly excellent durability (>500 000 cycles). Moreover, compared with the traditional copper‐polytetrafluoroethylene (Cu‐PTFE) TENG with maximum transferred charges of 50 nC, those of the DLC‐glass TENG reaches 141 nC. Due to the low‐friction and high hardness of the triboelectric pair, the output quickly recovers after simply cleaning wear debris. The DLC‐glass TENG demonstrates an output power density of 530 mW m−2 and a fourfold faster capacitor charging speed than the Cu‐PTFE TENG. Compared to the reported durable TENGs via structure optimization and interface lubrication, the DLC‐glass TENG shows higher outputs and simpler structure. This DLC‐glass pair structure is also introduced into a spherical TENG for blue energy harvesting with excellent durability. The inorganic triboelectric pair with excellent mechanical durability and electrical performance proposed in this work shows huge prospects for practical applications of TENGs.
Room Temperature Phosphorescent Nanofiber Membranes by Bio‐Fermentation
Authors: Nie Xiaolin , Gong Junyi , Ding Zeyang , Wu Bo , Wang Wen‐Jin , Gao Feng , Zhang Guoqing , Alam Parvej , Xiong Yu , Zhao Zheng , Qiu Zijie , Tang Ben Zhong 
Published: July 2024

AbstractStimuli‐responsive materials exhibiting exceptional room temperature phosphorescence (RTP) hold promise for emerging technologies. However, constructing such systems in a sustainable, scalable, and processable manner remains challenging. This work reports a bio‐inspired strategy to develop RTP nanofiber materials using bacterial cellulose (BC) via bio‐fermentation. The green fabrication process, high biocompatibility, non‐toxicity, and abundant hydroxyl groups make BC an ideal biopolymer for constructing durable and stimuli‐responsive RTP materials. Remarkable RTP performance is observed with long lifetimes of up to 1636.79 ms at room temperature. Moreover, moisture can repeatedly quench and activate phosphorescence in a dynamic and tunable fashion by disrupting cellulose rigidity and permeability. With capabilities for repeatable moisture‐sensitive phosphorescence, these materials are highly suitable for applications such as anti‐counterfeiting and information encryption. This pioneering bio‐derived approach provides a reliable and sustainable blueprint for constructing dynamic, scalable, and processable RTP materials beyond synthetic polymers.
Organic cocrystals: From high‐performance molecular materials to multi‐functional applications
Authors: Ding Yuqing , Zhao Yan , Liu Yunqi 
Published: July 2024

AbstractAdvancements in organic electronics are propelling the development of new material systems, where organic materials stand out for their unique benefits, including tunability and cost‐effectiveness. Organic single crystals stand out for their ordered structure and reduced defects, enhancing the understanding of the relationship between structure and performance. Organic cocrystal engineering builds upon these foundations, exploring intermolecular interactions within multicomponent‐ordered crystalline materials to combine the inherent advantages of single‐component crystals. However, the path to realizing the full potential of organic cocrystals is fraught with challenges, including structural mismatches, unclear cocrystallization mechanisms, and unpredictable property alterations, which complicate the effective cocrystallization between different molecules. To deepen the understanding of this promising area, this review introduces the mechanism of organic cocrystal formation, the various stacking modes, and different growth techniques, and highlights the advancements in cocrystal engineering for multifunctional applications. The goal is to provide comprehensive guidelines for the cocrystal engineering of high‐performance molecular materials, thereby expanding the applications of organic cocrystals in the fields of optoelectronics, photothermal energy, and energy storage and conversion.
Pd(0)/TPPMS‐Catalyzed Tsuji–Trost Type Cross‐Coupling of Allylic Alcohols with Organoboron Compounds in Water
Authors: Hikawa Hidemasa , Fu Chuan , Nakayama Taku , Kikkawa Shoko , Azumaya Isao 
Published: July 2024

AbstractWe demonstrated that the combination of a Pd(0) catalyst and a water‐soluble TPPMS ligand has high activity for the direct arylation of readily available allylic alcohols in the Tsuji–Trost type cross‐coupling. Various organoboron reagents can be applied, enabling rapid access to the corresponding arylated products with a wide range of functional group tolerance. Kinetic studies revealed a first‐order rate dependence for the allylic alcohol, boronic acid, CsF and Pd(0)/TPPMS concentrations. A Hammett study found a slightly positive ρ value of 0.79, suggesting that a partial negative charge is generated on the aromatic ring of the aryl boronate in the rate‐determining transmetalation step. Based on several control experiments, we concluded that the transmetalation employing CsF would proceed via the oxo‐palladium mechanism.
Outdoor noncontact respiratory measurements of unrestricted rhesus macaques (Macaca mulatta) using millimeter‐wave radar
Authors: Minami Toshiki , Sanematsu Daisuke , Iwata Itsuki , Sakamoto Takuya , Myowa Masako 
Published: July 2024

AbstractRespiration is an invaluable signal that facilitates the real‐time observation of physiological dynamics. In recent years, the advancement of noncontact measurement technology has gained momentum in capturing physiological activities in natural settings. This technology is anticipated to be found not only in humans but also in nonhuman primates. Currently, the predominant noncontact approach for nonhuman animals involves measuring vital signs through subtle variations in skin color. However, this approach is limited when addressing areas of the body covered with hair or when working in outdoor settings under fluctuating sunlight. To overcome this issue, we focused on noncontact respiratory measurements using millimeter‐wave radar. Millimeter‐wave radar systems, which employ millimeter waves that can penetrate animal fur and estimate respiration‐derived periodic body motion, exhibit minimal susceptibility to sunlight interference. Thus, this method shows potential for conducting noncontact vital measurements in natural and outdoor settings. In this study, we validated a millimeter‐wave radar methodology for capturing respiration in outdoor‐housed rhesus macaques (Macaca mulatta). The radar was positioned beyond the captive enclosure and maintained at a distance >5 m from the target. Millimeter waves were transmitted to the target, and the reflected waves were used to estimate skin surface displacement associated with respiration. The results revealed periodic skin surface displacement, and the estimated respiratory rates weres within the reported range of respiratory rates for rhesus macaques. These results suggest the potential applicability of millimeter‐wave radar for noncontact respiration monitoring in outdoor‐living macaques without anesthesia or immobilization. The continued advancement of noncontact vital measurement technology will contribute to understanding primate mental and physical dynamics during their daily life.
Precise Manipulation of Electron Transfers in Clustered Five Redox Sites
Authors: Izu Hitoshi , Kondo Mio , Okamura Masaya , Tomoda Misa , Lee Sze Koon , Akai Takuya , Praneeth Vijayendran K. K. , Kanaike Mari , Kawata Satoshi , Masaoka Shigeyuki 
Published: July 2024

AbstractElectron transfers in multinuclear metal complexes are the origin of their unique functionalities both in natural and artificial systems. However, electron transfers in multinuclear metal complexes are generally complicated, and predicting and controlling these electron transfers is extremely difficult. Herein, we report the precise manipulation of the electron transfers in multinuclear metal complexes. The development of a rational synthetic strategy afforded a series of pentanuclear metal complexes which composed of metal ions and 3,5‐bis(2‐pyridyl)pyrazole (Hbpp) as a platform to probe the phenomena. Electrochemical and spectroscopic investigations clarified overall picture of the electron transfers in the pentanuclear complexes. In addition, unique electron transfer behaviors, in which the reduction of a metal center occurs during the oxidation of the overall complex, were identified. We also elucidated the two dominant factors that determine the manner of the electron transfers. Our results provide comprehensive guidelines for interpreting the complicated electron transfers in multinuclear metal complexes.
Tailoring Catalysis of Encapsulated Platinum Nanoparticles by Pore Wall Engineering of Covalent Organic Frameworks
Authors: Guo Mingchun , Guan Xinyu , Meng Qiangqiang , Gao Ming‐Liang , Li Qunxiang , Jiang Hai‐Long 
Published: July 2024

AbstractWhile supported metal nanoparticles (NPs) have shown significant promise in heterogeneous catalysis, precise control over their interaction with the support, which profoundly impacts their catalytic performance, remains a significant challenge. In this study, Pt NPs are incorporated into thioether‐functionalized covalent organic frameworks (denoted COF‐Sx), enabling precise control over the size and electronic state of Pt NPs by adjusting the thioether density dangling on the COF pore walls. Notably, the resulting Pt@COF‐Sx demonstrate exceptional selectivity (> 99 %) in catalytic hydrogenation of p‐chloronitrobenzene to p‐chloroaniline, in sharp contrast to the poor selectivity of Pt NPs embedded in thioether‐free COFs. Furthermore, the conversion over Pt@COF‐Sx exhibits a volcano‐type curve as the thioether density increases, due to the corresponding change of accessible Pt sites. This work provides an effective approach to regulating the catalysis of metal NPs via their microenvironment modulation, with the aid of rational design and precise tailoring of support structure.
Unconventional hcp/fcc Nickel Heteronanocrystal with Asymmetric Convex Sites Boosts Hydrogen Oxidation
Authors: Pan Hai‐Rui , Shi Zhuo‐Qi , Liu Xiao‐Zhi , Jin Shifeng , Fu Jiaju , Ding Liang , Wang Shu‐Qi , Li Jian , Zhang Linjuan , Su Dong , Ling Chongyi , Huang Yucheng , Xu Cailing , Tang Tang , Hu Jin‐Song 
Published: July 2024

AbstractDeveloping non‐platinum group metal catalysts for the sluggish hydrogen oxidation reaction (HOR) is critical for alkaline fuel cells. To date, Ni‐based materials are the most promising candidates but still suffer from insufficient performance. Herein, we report an unconventional hcp/fcc Ni (u‐hcp/fcc Ni) heteronanocrystal with multiple epitaxial hcp/fcc heterointerfaces and coherent twin boundaries, generating rugged surfaces with plenty of asymmetric convex sites. Systematic analyses discover that such convex sites enable the adsorption of *H in unusual bridge positions with weakened binding energy, circumventing the over‐strong *H adsorption on traditional hollow positions, and simultaneously stabilizing interfacial *H2O. It thus synergistically optimizes the HOR thermodynamic process as well as reduces the kinetic barrier of the rate‐determining Volmer step. Consequently, the developed u‐hcp/fcc Ni exhibits the top‐rank alkaline HOR activity with a mass activity of 40.6 mA mgNi−1 (6.3 times higher than fcc Ni control) together with superior stability and high CO‐tolerance. These results provide a paradigm for designing high‐performance catalysts by shifting the adsorption state of intermediates through configuring surface sites.
Photochemically Driven Peptide Formation in Supersaturated Aerosol Droplets
Authors: Logozzo Alexander , Vennes Benjamin , Kaur Kohli Ravleen , Davies James F. , Castillo‐Pazos Durbis J. , Li Chao‐Jun , Neish Catherine D. , Preston Thomas C. 
Published: July 2024

AbstractThe condensation of amino acids into peptides plays a crucial role in protein synthesis and is thus essential for understanding the origins of life. However, the spontaneous formation of peptides from amino acids in bulk aqueous media is energetically unfavorable, posing a challenge for elucidating plausible abiotic mechanisms. In this study, we investigate the formation of amide bonds between amino acids within highly supersaturated aerosol droplets containing dicyandiamide (DCD), a cyanide derivative potentially present on primordial Earth. Metastable states, i.e. supersaturation, within individual micron‐sized droplets are studied using both an optical trap and a linear quadrupole electrodynamic balance. When irradiated with intense visible light, amide bond formation is observed to occur and can be monitored using vibrational bands in Raman spectra. The reaction rate is found to be strongly influenced by droplet size and kinetic modelling suggests that it is driven by the photochemical product of a DCD self‐reaction. Our results highlight the potential of atmospheric aerosol particles as reaction environments for peptide synthesis and have potential implications for the prebiotic chemistry of early Earth.
Significantly enhanced crystallization of poly(L‐lactide) by incorporation of poly(D‐lactide) grafted cellulose nanocrystals
Authors: Li Meili , Meng Xiancheng , Tong Zaizai 
Published: July 2024

AbstractPoly(L‐lactic acid) (PLLA), as a green, biodegradable polymer material, has garnered considerable attention due to its ease of processing and exceptional properties. However, the inherent slow crystallization rate and brittleness of PLLA substantially restrict its extensive applications across various domains. In present work, PLLA and poly(D‐lactide) (PDLA)‐modified cellulose nanocrystals (CNCs), referred as CNC‐g‐L and CNC‐g‐D, are serving as nano‐fillers to enhance the crystallization rate of PLLA. Our findings demonstrate that both nano‐fillers could enhance the crystallization rate of PLLA, but the CNC‐g‐D shows a more efficient nucleation agent compared with its counterpart, CNC‐g‐L. Isothermal crystallization analysis indicates that CNC‐g‐D substantially increases nucleation density of PLLA, with pronounced crystallization at an elevated temperature of 155°C as confirmed by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). Wide‐angle x‐ray diffraction (WAXD) analysis shows the preformation of stereocomplex crystals on the CNC‐g‐D surface may result in a fast crystallization rate. Meanwhile, after incorporation of different nano‐fillers, the toughness property of PLLA has also been significantly enhanced. Our result has shown the CNC‐g‐D could serve as an efficient nucleation agent toward PLLA and also facilitate to aiding in establishing comprehensive structure–property relationships of polymer materials.
A High‐Performance, Low Defected, and Binder‐Free Graphene‐Based Supercapacitor Obtained via Synergistic Electrochemical Exfoliation and Electrophoretic Deposition Process
Authors: Abdillah Oktaviardi Bityasmawan , Jaoh Fatihah Lailayen , Fitriani Pipit , Nuryadin Bebeh Wahid , Aimon Akfiny Hasdi , Iskandar Ferry 
Published: July 2024

AbstractAn integrated electrochemical exfoliation and electrophoretic deposition (EPD) method is developed to achieve a high‐performance graphene supercapacitor. The electrochemical delamination of graphite sheet has obtained a low‐defected few‐layer graphene adorned with oxygen‐containing functional groups. Then, the EPD process produced a binder‐free electrode to alleviate the graphene restacking problem. The electrode prepared using a deposition voltage of 5 V exhibits the highest specific capacitance of 145.95 F/g at 0.5 A/g from three‐electrode measurement. Moreover, this EPD‐prepared electrode also demonstrates superior electrochemical properties compared to electrodes fabricated using PVDF binder. In the real symmetrical cell, the EPD‐prepared electrode also shows excellent performance with a high rate capability of 82.31 % (from 0.5 A/g to 10 A/g), high cycling stability of 95.00 % (at 5 A/g) after 10,000 cycles, and rapid frequency response with short relaxation time ( ) of 9.73 ms. These results indicate that this integration method is beneficial to construct a high performance binder‐free supercapacitor electrode consisting of low‐defected graphene materials, low electrode resistance, and less agglomeration of graphene sheets by utilizing an environmentally friendly process.
Correlation analysis of degrading systems based on bivariate Wiener processes under imperfect maintenance
Authors: Bautista Lucía , Castro Inma T. , Bérenguer Christophe , Gaudoin Olivier , Doyen Laurent 
Published: July 2024

AbstractThis article focuses on the correlation between the degradation levels of the two components that form a system. The degradation evolution of each component is modeled using Wiener processes. Both components are dependent and this dependence is described using the trivariate reduction method. To reduce the degradation and extend the system lifetime, preventive maintenance actions are periodically performed. These preventive maintenance actions are imperfect and they are modeled by using an arithmetic reduction of degradation of infinite order model with a determined maintenance efficiency parameter. The evolution of the maintained system is analysed by assessing the expectation and variance of both degradation processes at successive maintenance times. The novelty of this work is the analysis of the Pearson correlation coefficient between the degradation levels of the two components. Different properties of the monotonicity of the Pearson correlation coefficient between the two degradation paths are obtained by considering equal maintenance efficiency and equal general time scales functions for the two Wiener degradation processes associated to each degrading component.
Screening and characterization of Chromobacterium piscinae AMA‐5 for enhanced production of violacein and its ability of textile dyeing
Authors: Deeppal  , Raj Kishan Kumar , Chowdhury Tapas , Umarajashekhar Alavala , Soni Ravindra 
Published: July 2024

AbstractA violet pigment (violacein) bacterial isolate AMA‐5 was isolated from soil samples collected from Achanakmar Biosphere Reserve, Mungeli district, Chhattisgarh, India. The yield of biocolor from this isolate was screened in minimal medium after 48 h of incubation at 37°C ± 2°C temperature. The violet pigment was extracted in ethanol. It was also observed that ammonium chloride (2.5 g/1000 mL) as a nitrogen source is the best to enhance AMA‐5 pigment production among other nitrogen sources (ammonium sulfate, tryptophan, ammonium iron sulfate, and peptone). The Sanger sequencing of 16S rDNA of strain AMA‐5 showed similarity with Chromobacterium piscinae. From the available literature and research articles, it was assumed that this violet color pigment is violacein. It was further verified by conducting high‐performance liquid chromatography (HPLC), Fourier transform infrared spectroscopy (FTIR), and proton nuclear magnetic resonance (1H‐NMR) analysis. The violet biocolor that extracted was used in cotton and polyester fabric dyeing. After the fabrics treated with sodium chloride as a mordant were completely dried, it was identified that the color was solidifying. Overall study showed that C. piscinae AMA‐5 has good potential for production of violacein, which is the most important industrial natural dye used to add color to textile products.
Mitigating Dissolution to Enhance the Performance of Pillar[5]quinone in Sodium Batteries
Authors: Adil Md. , Schmidt Maximilian , Vogt Julia , Diemant Thomas , Oschatz Martin , Esser Birgit 
Published: July 2024

AbstractSodium‐ion batteries using organic electrode materials are a promising alternative to state‐of‐the‐art lithium‐ion batteries. However, their practical viability is hindered by challenges such as a low specific capacity of the organic electrode materials, or their dissolution in the electrolyte. We herein present a double mitigation strategy to enhance the performance of pillar[5]quinone (P5Q) as positive electrode material in sodium batteries. Using 5 m sodium bis(fluorosulfonyl)imide in succinonitrile as highly concentrated electrolyte, as well as encapsulating P5Q in CMK‐3 (Carbon Mesostructured by KAIST with hexagonally ordered rod‐like carbon domains) as templated ordered mesoporous carbon, we achieve a record cycling performance with improved cycling stability even at elevated temperature (40 °C). The P5Q@CMK‐3 composite electrode delivers 430 mAh g−1 specific discharge capacity at 0.2 C rate with 90 % retention over 200 cycles. This corresponds to an energy density of 831 Wh kg−1 (based on P5Q mass) and surpasses previous reports on pillarquinones. When operated at 40 °C, the P5Q@CMK‐3 composite electrodes deliver a specific discharge capacity of 438 mAh g−1 with 88 % capacity retention over 500 cycles (0.02 % per cycle). This study underscores the crucial role the electrolyte plays in advancing organic sodium batteries, offering a promising avenue for the future of sustainable energy technologies.