Science China-Materials
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2026
·
IF 7.4
Dai Wenqing,Geng Yongfeng,Zhang Xiaohui,He Shiyu,Xiong Ding-Bang
In composites with specific structures, rational regulation of the structure and distribution of reinforcing phases is shown to enhance both strength and ductility. Typical structures such as network, layered, and columnar structures have proven to be effective in improving the strength and ductility of the composites. However, issues such as narrow size ranges, uneven distribution, and weak interfacial bonding of the reinforcements have resulted in the performance of the composite not being fully exploited. Here, we present a bioinspired multi-scale heterogeneous layered composite (MHLC) that achieves an optimal balance between strength and ductility. This heterogeneous layered structure is composed of alternately stacking Cu-Ti layers and GNPs/Cu layers, where the Cu-Ti layer contains uniformly distributed plate-like β-Cu 4 Ti intermetallic compounds, and the GNPs/Cu layer contains layered graphene nanoplatelets (GNPs). Additionally, the size, distribution, and shape of the reinforcements can be adjusted through heat treatment and cold rolling, thereby achieving a balance between strength and ductility. Molecular dynamics simulation and finite element simulation were conducted to investigate the structural evolution of β-Cu 4 Ti and the influence of the reinforcements on tensile properties, respectively. Our results provide important references for exploring the potential of multi-scale heterogeneous layered structures in enhancing the strength and ductility of the composites.
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APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2026
·Vol. 132
·期 1
·63
·
IF 2.8
Yan Tingting,Sun Lei,Xi Dongyang,Jin Dinghan,Li Han,Liu Linan
This study reports the successful synthesis of Sr₄Nb₂O₉:xHo³⁺ (x = 0.005–0.04) green phosphors by molten salt method. Unlike conventional solid-state synthesis (1350 °C for 7 h), this method reduces the reaction temperature to 1100 °C and decreases processing time to 5 h, yielding products with regular platelet morphology. Comprehensive structural, morphological, and optical characterizations were performed through X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence (PL) spectroscopy. The Sr₄Nb₂O₉:0.02Ho³⁺ phosphor exhibits a strong green emission peak at 530 nm under 460 nm excitation. The optimal doping concentration was determined to be 0.02 mol, with concentration quenching attributed to primarily mediated by dipole-dipole (d-d) interactions. The chromaticity coordinates (0.295, 0.696) indicate high color purity (99.5%) and a correlated color temperature (CCT) of 6033 K. High-pressure Raman experiments show that Sr₄Nb₂O₉ remains structurally stable up to 15.3 GPa. High-pressure fluorescence experiments reveal that the Sr₄Nb₂O₉:0.02Ho³⁺ phosphor maintains 58% of its ambient-pressure fluorescence intensity even at 18.2 GPa. Furthermore, at 448 K, the phosphor retains 86.8% of its room-temperature fluorescence intensity. The quantum yield of the Sr₄Nb₂O₉:0.02Ho³⁺ phosphor reached 23.6%. These findings suggest Sr₄Nb₂O₉:Ho³⁺ phosphors may be potential candidates for solid-state lighting applications in high-pressure environments. Graphical
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Nature Communications
·
2026
·
IF 15.7
Shi Qinhao,Ning Fanghua,Yu Xuan,Xia Fanjie,Qi Ruijuan,Cheng Guofeng,Qiu Yi,Liang Haoyang,Zheng Hongfei,Zhang Tao,Lu Shigang,Lan Tu,Wu Jinsong,Lyu Yingchun,Chen Huaican,Wen Wen,Yao Zhenpeng,Zhang Jiujun,Lu Jun,Zhao Yufeng
Layered transition metal oxide cathodes (Na x TMO 2 ) demonstrate a classic type of cathode for Sodium-ion batteries (SIBs), however their practical application faces a long-standing challenge of irreversible phase transitions at high voltages, which causes unsatisfied specific energy and cycling stability, particularly for P-type (Na + located at prismatic sites) cathodes. This phenomenon is conventionally ascribed to the Na + re-coordination from prismatic to octahedral (O-type) configuration upon Na + extraction, whereby the TMO 2 slab gliding and abrupt c -lattice change are always coupled, and a straightforward solution to this situation remains elusive. Here, we reveal that, the TMO 2 slab gliding and the lattice contraction can be decoupled, and the rapid lattice contraction under high state-of-charge underlies the fundamental origin for the irreversible phase transitions. By pre-engineering 15.8% O-type stacking faults to a P-type Na 0.7 Mn 0.8 Ni 0.2 O 2 , the dramatic volume variation and irreversible phase transitions at high voltage (4.5 V vs. Na + /Na) can be primarily eliminated. This work advances the understanding on the phase transitions at deep desodiation states, and paves up a feasible way to realize high-energy layered oxides.
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PubMed
高影响因子
Scientific Reports
·
2026
·
IF 3.9
Li Tianxi,Zhang Chen,Su Diya,Wang Jieqing
Polydimethylsiloxane (PDMS) is widely used across various fields due to its biocompatibility and chemical inertness. However, its surface hydrophobicity limits its application in cell culture. This study modifies PDMS surfaces with polydopamine (PDA) to mitigate hydrophobicity, with a primary focus on evaluating fibroblast biocompatibility on the modified substrate at a selected concentration (0.2%) and exploring its potential for wound healing applications. PDMS was surface-modified with PDA solutions at concentrations of 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, and 0.5% (W/V%) to evaluate its wettability. Based on the preliminary screening of material contact angle and cell viability after material-cell interaction, 0.2% PDA-PDMS was chosen for all subsequent biological tests. Mouse fibroblasts L929 were cultured on the selected substrate. Cell proliferation was determined by the CCK-8 assay. FITC/DAPI fluorescent staining, scratch assay, and RT-qPCR were used to evaluate cell spreading, migration, and gene expression. Statistical analysis employed t-test, one-way ANOVA, and two-way ANOVA. All PDA concentrations significantly reduced material contact angles (P < 0.01). At 48 h of interaction, the 0.2% PDA-PDMS exhibited the highest cell viability in CCK-8 assay among all concentrations (P < 0.0001), with significantly increased cell viability observed at 48 and 72 h (P < 0.05). The cell scratch assay showed that L929 cultured on 0.2% PDA-PDMS had largely recovered by 36 h post-scratch, with no significant difference compared to cells cultured on PDA-PDMS from 0 h to 18 h (P > 0.05). RT-qPCR indicated significantly elevated expression of transforming growth factor-β1 ( TGF-β1 ) and collagen α-1 (III) chain ( COL3A1 ) at 24 h and 36 h, and α-smooth muscle actin ( α-SMA ) at 48 h, compared to control (P < 0.05). PDA significantly decreased the hydrophobicity of the PDMS and enhanced its wettability. Based on preliminary assessment across concentrations, 0.2% PDA-PDMS demonstrated the highest cell proliferation and viability among the tested groups. PDA surface modification at this concentration also enhanced cell migration ability, improved cell morphology and spreading, and increased the expression of related genes.
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Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·105
·
IF 36.3
Wang Xu,Yang Zixiang,Cai Yujia,Ma Heng,Xu Jinglei,Khatoon Rabia,Ye Zhizhen,Wang Dashuai,Sajjad Muhammad Tariq,Lu Jianguo
A novel “Na–Y” interlayer aggregate is proposed, which acts as a robust interlayer pillar, distinct from previously reported single-ion-based pillar structures.
The coexistence of ordered and disordered Na⁺/vacancy states resulting from Cu/Y dual-site doping can stimulate rapid Na⁺ diffusion.
The designed Na 0.67 Y 0.05 Ni 0.18 Cu 0.1 Mn 0.67 O 2 electrode exhibits outstanding long-term cycling performance (~3000 cycles) and high-rate capability (~ 70 mAh g −1 at 50 C).
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International Journal of Environmental Science and Technology
·
2026
·Vol. 23
·期 3
·209
·
IF 3.4
Omar S.,Omar M.,El-Subruiti G. M.,Attia N. F.,Eltaweil A.
This study presents a novel MgSn(OH) 6 /4CuS@HC photocatalyst developed via hydrothermal treatment followed by chemical precipitation. MgSn(OH) 6 /4CuS@HC was applied for wastewater treatment, targeting eight pollutants: Tetracycline, Doxycycline, Ofloxacin, 3-Nitroaniline, 2-Nitrophenol, Methyl red, Congo red, and Methylene blue. The novel photocatalyst was studied using FTIR, EDX, DRS, SEM, and PL techniques. To gain further insight into the reaction mechanism, scavenger experiments were conducted in addition to operational parameters such as pH, dosage, CuS loading on MgSn(OH) 6 @HC, pollutant initial concentration, selectivity, reusability, water source, and kinetic studies. The performance test highlighted the outstanding photocatalytic activity of templated MgSn(OH) 6 /4CuS@HC, exhibiting remarkable stability over five cycles. This performance is attributed to the direct Z-scheme mechanism and the hydrochar template, which improve charge separation, extend photocharge lifetime, and reduce the agglomeration of nanosemiconductors, thereby enhancing overall stability. This study offers a new perspective on green photocatalysts for diverse environmental applications.
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Journal of Food Measurement and Characterization
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2026
·
IF 3.3
Yang Fan,Ruan Ya,Yang Yaling
For the first time, copper-doped amino acid carbon dots (Cu/Asp-CDs) are reported as a green peroxidase-like nanozyme. Using Cu 2+ as the metal dopant and L-aspartic acid (Asp) as the ligand, Cu/Asp-CDs exhibit high catalytic activity and stability. They efficiently catalyze the oxidation of butylated hydroxyanisole (BHA) in the presence of 4-aminoantipyrine (4-AP) and H 2 O 2 , producing a visible color change for rapid and specific BHA detection. Based on this, a portable, cost-effective colorimetric sensor was developed, showing high sensitivity, selectivity, and linearity from 0.67 to 66.67 μM, with a detection limit of 0.27 μM. To extract BHA from edible oils, a deep eutectic solvent of choline chloride and thymol (1:2 molar ratio) was used in liquid–liquid microextraction, achieving recoveries of 89.0–109.0%. Combined with the nanozyme, this method enables a practical, rapid (within 20 min) assessment of synthetic antioxidants, offering a reliable tool for food quality monitoring.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 2
·142
·
IF 2.8
Zhang Binbin,Liu Yuanhao,Mou Guorui,Liang Zhijie,Wang Chong,Zhou Guoyun,Li Jiujuan,Yang Wenjun,Wen Zesheng,Xu Yongqiang,He Wei,Hong Yan
In this work, a simple, low-cost and palladium-free method for the electroless metallization of polyethylene terephthalate (PET) fibers was developed to enable insulate PET fibers with electrical conductivity. The activation solution containing silver nanoparticles (AgNPs) dispersed in dimethyl sulfoxide (DMSO) is applied to form a polyvinylpyrrolidone (PVP)-rich surface-physical-interpenetrating-network (SPIN) structure on the surface of the PET fibers. The formed AgNPs adsorb to the PVP within SPIN, serving as active sites dispersed on the fiber surface for metal deposition. The obtained AgNP-SPIN surface was examined by morphological and chemical characterizations, confirming the complete modification over the PET fiber surface. Followed by electroless copper plating, a uniform and dense copper layer with a thickness of approximately 0.8 μm was deposited covering the PET fiber surface. The fabricated conductive PET fibers exhibit outstanding flexibility and strong adhesion between the copper and polymer interface. By sewing the developed conductive fiber threads onto the fabric, the flexible circuit on regular cotton cloth was realized.
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Journal of Sustainable Metallurgy
·
2026
·
IF 3.2
Teng Liumei,Liu Jiangqi,Zhou Huichen,Jin Xiao,Guo Chaozhong,Liu Weizao,Liu Qingcai,Yang Chen
The significance of recycling spent lithium-ion batteries (LIBs) has increased due to the rapid development of electric vehicles. This work developed a facile and green process that used recyclable ammonium hydrogen sulfate (NH 4 HSO 4 ) and hydrogen peroxide (H 2 O 2 ) to efficiently extract valuable metals from spent LIBs cathodes. During the investigation, NH 4 HSO 4 was employed as the leaching agent and H 2 O 2 served as the reducing agent. A series of single-factor experiments were performed to explore the effects of NH 4 HSO 4 concentration, reducing agent type and concentration, reaction temperature, reaction time, and liquid–solid ratio on extraction efficiency. The crystal structure, surface morphology, and valence state of cathode materials were determined using X-ray diffraction, scanning electron microscopy coupled with energy dispersion spectroscopy, and X-ray photoelectron spectroscopy. The results showed that the synergistic impact of NH 4 HSO 4 and H 2 O 2 could greatly improve the leaching efficiency of Li, Ni, Co, and Mn. And the ideal leaching conditions resulted in Li, Ni, Co, and Mn leaching efficiencies of 98.7%, 97.68%, 98.32%, and 97.46%, respectively. This research established a theoretical framework and offered technical support to enhance the efficient retrieval of discarded LIBs. Graphic
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Scientific Reports
·
2017
·Vol. 7
·期 1
·11310
·
IF 4.259
Cheng Shumin,Tang Shanshan,Tsona Narcisse T.,Du Lin
To study the influence of the position of the double bond and ring size on the stability of hydrogen bonded complexes, the 1:1 complexes formed between 2,2,2-trifluoroethanol (TFE) and three heterocyclic compounds including 2,3-dihydrofuran (2,3-DHF), 2,5-dihydrofuran (2,5-DHF) and 3,4-dihydropyran (3,4-DHP) were investigated systematically. The formation of hydrogen bonded TFE−2,3-DHF, TFE−2,5-DHF and TFE−3,4-DHP complexes were identified by gas phase FTIR spectroscopy at room temperature, and the OH-stretching fundamental transition of TFE was red shifted upon complexation. The competition between the O atom and π-electrons bonding sites within the complexes was studied, and the O−H···π type hydrogen bond was found to be less stable than the O−H···O in all three cases. The observed red shifts of the OH-stretching fundamental transitions in the complexes were attributed to the formation of O−H···O hydrogen bond. Equilibrium constants of the complexation reactions were determined from measured and calculated OH-stretching fundamental intensities. Both theoretical calculations and experimental results reveal that the hydrogen bond strengths in the complexes follow the sequence: TFE−2,5-DHF > TFE−2,3-DHF ≈ TFE−3,4-DHP, thus the position of the double bond exerts significantly larger influence than ring size on the stability of the selected hydrogen bonded complexes.
研究领域:
物理化学
·
光谱学
·
分子相互作用
·
理论化学
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npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·14
·
IF 12.3
Xue Fuhua,Peng Qingyu,Ding Renjie,Li Pengyang,Zhao Xu,Zheng Haowen,Xu Liangliang,Tang Zhigong,Zhang Xinxing,He Xiaodong
Developing strain sensors with both high sensitivity and high linearity has always been the goal of researchers. Compared to resistive strain sensors, capacitive strain sensors have incomparable linearity advantages, but have always been limited by low sensitivity. Here, we report a gradient stiffness sliding design strategy that addresses this problem, significantly improving sensitivity while maintaining high linearity. By controlling the distribution of the locally enhanced electric field and the heterogeneous deformation of the substrate, a strain sensor with excellent performance is successfully prepared, exhibiting a giant gauge factor (9.1 × 10 6 ) and linearity ( R 2 = 0.9997) over the entire sensing range, together with almost no hysteresis and fast response time (17 ms). The gradient stiffness sliding design is a general strategy expected to be applied to other types of sensors to achieve ultra-high sensitivity and ultra-high linearity at the same time.
研究领域:
材料科学
·
传感器与执行器
·
柔性电子学
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纳米技术
·
机械工程
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高影响因子
IONICS
·
2019
·Vol. 25
·期 10
·4805-4815
·
IF 2.289
Sun Tianjiao,Yao Xiaolin,Luo Yanxiang,Fang Minhua,Shui Miao,Shu Jie,Ren Yuanlong
Aqueous magnesium ion batteries have been identified as potential electrochemical energy storage system due to their similar electrochemical properties to lithium, safety, high abundance, and low cost. Here, micron-sized Na 0.7 MnO 2.05 is prepared by a facile sol-gel method used for cathode material in aqueous magnesium ion batteries. XRD, XPS, SEM, TEM, and EDS were used to test the composition, structure, and morphology of Na 0.7 MnO 2.05 . Na 0.7 MnO 2.05 material is electro-chemical active although the intercalation/deintercalation is much difficult for Mg 2+ . The reversible specific capacities of the Na 0.7 MnO 2.05 cathode material are estimated to be ca. 40, 35, 22, and 13 mAh·g −1 at the current density of 1 C, 2 C, 5 C, and 10 C, respectively. When the current density comes back to 1 C, the charge capacities recover to 40 mAh·g −1 . Furthermore, EIS and GITT measured show that the diffusion coefficient of Mg 2+ ion in lattice of Na 0.7 MnO 2.05 varies from 2.17 × 10 −11 cm 2 ·s −1 to 7.81 × 10 −11 cm 2 ·s −1 in charge process and changes from 6.34 × 10 −12 cm 2 ·s −1 to 7.14 × 10 −11 cm 2 ·s −1 in discharge process.
研究领域:
材料科学
·
电化学
·
能量存储
·
电池技术
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