Science China-Materials
·
2025
·
IF 7.4
Chen Haisheng,An Yu,Wang Yinghan,Du Xiaona,Hu Minghao,Bai Gongxun,Ye Shi,Liu Weiwei,Zhang Yang
Thermal quenching, a pervasive challenge in luminescent materials, severely limits the performance of lanthanide-based optical sensors at elevated temperatures. While negative thermal expansion (NTE) hosts have shown promise in bulk systems for countering this effect, their potential in thin-film architectures, critically for integrated photonics and miniaturized sensing, remains unexplored. Here, we demonstrate a Yb 3+ /Er 3+ co-doped Sc 2 Mo 3 O 12 thin film that leverages anisotropic NTE dynamics to achieve 42-fold thermal enhancement in green upconversion luminescence from 300 to 560 K. In situ thermodiffraction and time-resolved spectroscopy reveal a dual mechanism: (1) lattice contraction along the a - and c -axes reduces the cell volume of Sc 2 Mo 3 O 12 by 11.3 Å 3 , thereby amplifying Förster-type energy transfer ( k ET ∝ R −6 ) from Yb 3+ to Er 3+ , and (2) symmetry-breaking distortions suppress nonradiative 2 H 11/2 → 4 F 9/2 relaxations, extending Er 3+ lifetimes by 358%. Crucially, the film’s strain-engineered crystal field enables multi-modal thermometry with record sensitivities: a relative sensitivity ( S r ) of 4.33% K −1 at 300 K, and maximum S r = 1.28% K −1 through lifetime-based sensing, which outperforms conventional Boltzmann-limited approaches. The sub-200 nm thickness and SiO 2 /Si compatibility further position this platform for on-chip integration, addressing unmet needs in high-resolution thermal mapping for quantum devices, aerospace diagnostics, and wearable sensors. This work not only deciphers the interplay between NTE and luminescence at the atomic scale but also establishes a universal strategy to design anti-thermal-quenching thin films for extreme-environment photonics.
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高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-8
·
IF 15.7
Li Yimeng,Xia Linghan,Li Nan,Tang Shilong,Ge Yunsong,Wang Jianyu,Xiao Bing,Cheng Yonghong,Ang Lay Kee,Meng Guodong
Field electron emission is a key mechanism in nanoelectronics with nanogaps, offering advantages such as high electron velocity and fast switching speeds. However, nanoscale field emission, affected by geometric asymmetry including quantum tunneling near to the emitter, and quantum space charge effects, remains largely unexplored in experimental studies. Here, we in situ investigated field emission characteristics of pure tungsten nanotips across vacuum nanogaps. We revealed a widely applicable scaling behavior between field emission characteristics and the ratio of apex radius to gap length ( R/d ), and demonstrated that the effects of quantum tunnelling due to emitter shape are the predominant influence. We further proposed a modified field emission equation, incorporating an empirical formula for the apex shape factor, k MG ( k MG = f ( R / d ) = 1.680 × ( R / d + 0.468) −1.066 ), valid for R / d = 0.04 to 48. These findings provide fundamental insights into the optimization of nanoelectronic device design and the advancement of future technologies.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2025
·Vol. 27
·期 4
·1-14
·
IF 2.6
Zhu Yuan,Lu Peiqi,Liao Youwu,Adu-Frimpong Michael,Zou Zhihui,Jin Zhou,Wang Chengwei,Peng Min,Peng Houping,Xu Jingze,Xu Ying,Yu Jiangnan,Xu Ximing
This study aimed to prepare core–shell structural PLGA nanoparticles of astaxanthin (ASTA-PLGA@M) via micelle template for sustained release in vitro and long-term hepatoprotective effects in vivo. The morphology, mean particle size, zeta potential, polydispersity index (PDI), and drug loading efficiency of optimized formulation were investigated. Meanwhile, the physicochemical characterizations including X-ray diffraction (XRD) and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) of ASTA-PLGA@M were evaluated to prove the successful encapsulation of astaxanthin. The in vitro release of astaxanthin from ASTA-PLGA@M in four different media was sustained slowly for 120 h. An in vivo release study also demonstrated that ASTA-PLGA@M nanoparticles enhanced oral bioavailability significantly. In addition, the hepatoprotective effects of astaxanthin on oxidative stress (OS) accompanied by apoptosis in acute hepatic damage caused by carbon tetrachloride (CCl 4 ) in mice were investigated. ASTA-PLGA@M nanoparticles provide a clear elevating effect on the activity of SOD and inhibit the increase of MDA during acute liver damage caused by CCl4. Moreover, histopathological analysis was conducted to study the long-term hepatoprotective effects of ASTA-PLGA@M for further application of astaxanthin in functional food or clinical use.
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RARE METALS
·
2025
·Vol. 44
·期 9
·6483-6493
·
IF 11
Zhao Yang,Yu Hong-Bin,Zhao Chun-Yu,Kong De-Nan,Wang Dai-Nan,Fu Long-Yi,Hu Qing-Mei,Li Dian,Zang Tian-Yu,Zheng Shou-Jun,Zhou Yao,Zhou Jia-Dong
Employing two-dimensional (2D) synaptic devices to develop a brain-inspired neuromorphic computing system is a promising approach to overcoming the limitations of the von Neumann architecture. However, isotropic 2D materials are predominantly utilized to fabricate synaptic devices. Research on inherently anisotropic 2D materials in synaptic devices remains scarce. Here, we report an intrinsically anisotropic material, CrSBr, which exhibits optoelectronic properties with significant angular dependence, achieving a carrier mobility ratio as high as 7.83 between the a -axis and b -axis. Based on this, we couple the in-plane anisotropy into the synaptic device and construct CrSBr/WSe 2 multi-terminal device. This device can be regulated by the gate voltage and laser, exhibiting storage and synaptic behaviors dependent on the a and b axes. Furthermore, we apply the synaptic property to achieve image recognition. Due to the anisotropic response to identical external stimulus, the a -axis conductance trend transits from nonlinear to approximately linear within the multi-terminal conductance framework. This multi-terminal synapse model achieves a recognition rate of up to 91% on the Fashion-MNIST database, significantly outperforming single-terminal recognition performance. Our work introduces a novel approach to anisotropic artificial synapses for simulated image recognition and establishes a foundation for developing AI systems with enhanced recognition rates. Graphical abstract
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JOM
·
2025
·
IF 2.3
Wang Guishuai,Mao Xudong,He Zhanwei,Zhou Baoqing,Zeng Qiong,Shi Lei,Li Jingbo,Zhou Ping,Xiong Wenqi,Gao Siyuan
With the increasing demand for sustainable resource utilization, the recovery of iron-rich phases from steel slag has garnered significant attention. This study investigated the transformation of iron-bearing phases in synthetic steel slag through thermodynamic analysis. The crystallization behavior of magnesium ferrite spinel (MgFe 2 O 4 ) was explored using in situ high-temperature laser scanning confocal microscopy (HLSCM), phase analysis, and microstructural characterization. The results indicate that an appropriate basicity promotes the transformation of FeO into strongly magnetic MgFe 2 O 4 , with an optimal basicity of 2.00. Under oxidation conditions, during the cooling process of molten synthetic slag, MgFe 2 O 4 crystal nuclei preferentially precipitate at higher temperatures. Subsequently, epitaxial and vertical growth occurs, eventually forming polyhedral structures. As the temperature further decreases to 1350℃, grain migration and aggregation dominate, leading to further growth of MgFe 2 O 4 grains. SEM-EDS and XRD analysis further confirmed the transformation of iron-bearing phases into MgFe 2 O 4 and its crystallization behavior. This study reveals the key factors influencing the transformation of iron-bearing phases in molten steel slag and the growth control mechanisms of MgFe 2 O 4 grains. It provides a theoretical basis for optimizing steel slag oxidation processes to improve iron recovery rates, offering new insights for the resource utilization of industrial solid waste.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Cao Yuanhang,Wang Jiemin,Guan Weixin,An Meng,Yan Peng,Li Zhengtong,Zhao Changsheng,Yu Guihua
Interfacial solar-driven evaporation has attracted great research interests, given its high conversion efficiency of solar energy and transformative industrial potential for desalination. However, current evaporators with porous volume remain critical challenges by inherently balancing efficient fluid transport and effective heat localization. Herein, we propose the strategy and design of lightweight, flexible and monolayered fluidic diode membrane-based evaporators, featuring regularly arrayed macropores and dense nanopores on each side. Such a delicate microstructure offers universality in establishing asymmetric channels along macroporous-to-nanoporous to enable the diode-like directional water transport as well as facilitate the heat localization on the nanopores side. Consequently, a high evaporation rate of a maximum 3.82 kg m −2 h −1 can be achieved under 1 sun illumination, exceeding most 2D and 3D evaporators. Besides, the durability and practicability of our evaporators are validated through salt resistance tests, purification experiments among various contaminants, and outdoor evaluations. Moreover, the structure engineering and water-transport optimization of fluidic diode membranes also offer potentials for hydrovoltaic applications, with over 1.6 V generated by tandem devices at the ambient environment. This work provides a concept for designing high-performance monolayered membranes applicable in environmental and energy-related realms.
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PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Gu Jia-Min,Kim Hyunmin,Zhao Ju-Zheng,Wang Yu-Qi,Zhao Yun-Xia,Ye Cai-Chao,Bu Yun-Fei
Advancing clean energy technologies demands efficient and durable electrode catalysts for solid oxide cells (SOCs). Despite their exceptional catalytic properties, Pt-based materials face critical challenges in high-temperature applications owing to particle agglomeration and cost constraints. Here, we demonstrate a rational design strategy utilizing controlled in situ exsolution to create strongly anchored PtSn nanoalloys on oxygen-deficient PrBaMn 1.8 Pt 0.1 Sn 0.1 O 5+ δ (L-PBMPtSn) perovskite oxide. Through precise compositional engineering and structural control, we achieved a uniform dispersion of PtSn nanoparticles with unique socket-like interfaces that prevent agglomeration while maintaining high catalytic accessibility. The optimized electrode demonstrates remarkable bifunctional performance, achieving a current density of 1.6 A cm −2 at 1.8 V for CO 2 electrolysis and a maximum power density of 316 mW cm −2 for fuel cell operation at 800 °C. More significantly, the electrode exhibits exceptional stability with only 9.6% performance degradation over 100 h of operation, which is a substantial improvement over conventional electrodes. Our findings establish a new paradigm for designing high-performance SOC electrodes through the controlled exsolution of precious metal alloys, offering broader implications for catalyst design in high-temperature electrochemical systems. Graphical abstract
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2025
·Vol. 131
·期 6
·1-7
·
IF 2.8
Yuan Lifang,Wang Junzhong,Huang Zhijin,Shen Kaixiang
Long afterglow phosphors have garnered significant attention for their ability to emit light long after excitation ceases. Afterglow emission relies on metastable trap levels within the bandgap of the host materials. Effective trap engineering strategies to optimize traps are critical in determining the afterglow performance. In this study, we investigate the codoping of Bi 3+ and Er 3+ into LiTaO 3 to enhance afterglow performance. Through high-temperature solid-state synthesis, a series of LiTaO 3 :x%Bi 3+ , y%Er 3+ (x = 0 or 0.5%, y = 0.1–4.0%) samples were prepared successfully. Structural characterization confirmed the successful incorporation of Bi 3+ and Er 3+ into the Li⁺ sites without disrupting the host lattice. Photoluminescence studies revealed that Bi³⁺ codoping significantly enhances the green emission of Er³⁺, with optimal performance achieved at 1.0% Er 3+ doping. Thermoluminescence (TL) analysis demonstrated the presence of traps with the depth of 0.748 eV, enabling prolonged afterglow emission at room temperature. The afterglow mechanism involves charge carrier storage in traps under UV excitation, followed by thermal release and recombination at luminescent centers, facilitated by energy transfer from Bi 3+ to Er 3+ . This work provides a strategy for designing a long afterglow phosphor through controlled codoping, offering insights into trap engineering and energy transfer processes in perovskite-based luminescent materials.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Zhang Shengfeng,Zuo Wenhua,Fu Xiaoguang,Li Juntao,Zhang Qiuwen,Yang Weihua,Chen Hongwei,Zhang Junyu,Xiao Xianghui,Amine Khalil,Sun Shi-Gang,Fu Fang,Ye Meidan,Xu Gui-Liang
Conversion electrodes offer higher reversible capacity and lower cost than conventional intercalation chemistry electrodes, but suffer from kinetic limitation and large volume expansion. Despite significant efforts, developing conversion electrodes with fast charging capability and extended lifespan remains challenging. Here, by leveraging the advantages of high-entropy doping and morphology tailoring, we develop a high-entropy hierarchical micro/nanostructured sulfoselenide Cu 0.88 Sn 0.02 Sb 0.02 Bi 0.02 Mn 0.02 S 0.9 Se 0.1 electrode with entropy-driven fast-charging capability. When used as a negative electrode material for sodium-ion batteries, it achieves a stable cycle life of 10,000 cycles at 30 A g −1 and a high reversible capacity of 365.7 mAh g −1 under fast charging in 13 seconds at 100 A g −1 . Moreover, high-entropy sulfoselenide also demonstrates stable cycling and good rate capability as a positive electrode material for lithium metal batteries, achieving a fast-charging capability of 37 seconds that is comparable with state-of-the-art layered cathodes. High-entropy sulfoselenide is characterized by its robust crystal structure, low ion diffusion barrier, and effective suppression of side reactions with electrolytes during cycling. Importantly, transmission X-ray microscopy affirms the chemical stability of HESSe, which underpins its fast-charging performance.
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International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 6
·1461-1470
·
IF 7.2
Ahmad Touqeer,Zhu Zhengxin,Sajid Muhammad,Wang Weiping,Ma Yirui,Ali Mohsin,Khan Nawab Ali,Liu Shuang,Zhang Zuodong,Chen Wei
Along with the surging demand for energy storage devices, the cost and availability of the materials remain dominant factors in slowing down their industrial application. The repurposing of waste asphalt into high-performance electrode materials is of significant interest, as it holds the potential to circumvent energy and environmental issues. Here, we report the controllable synthesis of asphalt-derived mesoporous carbon as an active material for electrocatalytic hydrogen gas capacitor (EHGC). The hierarchically porous carbon (HPC) with a high surface area of 1943.4 m 2 ·g −1 can operate in pH universal aqueous electrolytes in EHGC. It displays a specific energy and power density of 57 Wh·kg −1 and 554 W·kg −1 in neutral electrolyte as well as 52 Wh·kg −1 and 657 W·kg −1 in acidic electrolyte. Additionally, the charge storage mechanism of HPC–EHGC is studied with the help of Raman spectroscopy and X-ray photoelectron spectroscopy. Furthermore, the assembled HPC–EHGC device displays a discharge capacitance of 170 F·g −1 with an excellent capacitance retention rate of 100% up to 20000 cycles at 10 A·g −1 in acidic electrolyte. This work introduces a novel approach to converting waste asphalt into high-performance carbon for EHGC, achieving superior performance over commercial materials. By simultaneously addressing environmental waste issues and advancing energy storage technology, this study makes a significant contribution to sustainable materials science and next-generation battery development.
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高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-15
·
IF 15.7
Li Wenbin,Duan Yijie,Ge Shaohua,Wu Wenbo,Song Keming,Zhang Jiyu,Tang Guochuan,Zhao Lingfei,Yan Pengfei,Wang Enhui,Zhang Zhiguo,Cao Yuliang,Yang Yong,Chen Weihua
The unstable electrolyte–electrode interface and the trace H 2 O in commercial organic electrolytes critically limit the cycling life of batteries. Herein, a locking-chain sodium 4,4′-(1,4-phenylenebis(oxy))-bis(butane-1-sulfonate)−15-crown-5 (15PBS) is designed for phase-to-interface electrolyte optimization. In the electrolyte phase, the strong hydrophilic sulfonate groups and 15-crown-5 in 15PBS effectively transform H 2 O from a reactive aggregated state (strong H-bond) into an inactive state (weak H-bond) through adsorption, effectively suppressing H 2 O-induced electrolyte decomposition. At the electrolyte–electrode interface, 15PBS preferentially adsorbed onto hard carbon, displacing solvents within the electric double layer to form insoluble phenyl-rich sulfide solid electrolyte interphase with fast Na + transport. Simultaneously, 15PBS facilitates the formation of stable cathode-electrolyte interphase on Na 0.72 Ni 0.32 Mn 0.68 O 2 , improving Na + migration kinetics and cycling reversibility. The hard carbon | |Na 0.72 Ni 0.32 Mn 0.68 O 2 full cell with high specific energy of 191.7 Wh kg −1 (based on the total active-material mass) delivers long lifespan of 2000 cycles at 500 mA g −1 . Moreover, 15PBS is compatible with ester-based electrolytes in lithium-ion batteries, enabling stable cycling of commercial graphite and Si/C negative electrodes. This work provides an effective approach for durable electrolytes towards safe and high-performance batteries.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 31
·1-11
·
IF 2.8
Li Shanshan,Zhang Duo,Tian Zhongqing,Wang Fei,Meng Fancheng
Ba[(Zn 0.6 Mg 0.4 ) 1/3 Nb (2- x )/3 Sb x /3 ]O 3 (BZMNS, x = 0.15, 0.2, 0.25, 0.3, 0.35) ceramics were synthesized by the conventional solid-state reaction method. The crystal structure and microwave dielectric properties of the ceramics were investigated. X-ray diffraction (XRD) analysis revealed that the BZMNS ceramics exhibit a cubic perovskite structure. The crystal structures were refined, and no secondary phases were detected in all compositions. The doping of Sb 5+ hinders grain growth, and the average grain size first increases and then decreases with the increase of the x value. The dielectric constant shows a downward trend due to the influence of the ionic bond character of B-site ions and the B-site Rattling effect. The packing fraction is the main factor affecting the Q × f value of BZMNS ceramics. As the x value increases, the temperature coefficient of the resonant frequency ( τ f ) gradually decreases. Ion polarizability dilution is the primary mechanism for regulating τ f of BZMNS ceramics. The BZMNS ceramics sintered at 1480 °C with x = 0.3 exhibit optimal microwave dielectric properties ( ε r = 31.44, Q × f = 62,273 GHz (at f₀ = 6.5 GHz), τ f = + 2.48 ppm·°C −1 ), indicating that this ceramic has good application prospects.
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