CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Xuelu Wei,Laishi Li,Feng Liu,Limin Fan,Yusheng Wu
Ti 2 GaC is a novel ternary layered ceramic with unique physical and chemical properties such as excellent thermal conductivity , low density, high-temperature oxidation resistance , and corrosion resistance . However, the relatively low strength and hardness of Ti 2 GaC hinder its practical applications as a structural component. To strengthen the mechanical properties of Ti 2 GaC and extend its application range, in this study, (Ti 1-x V x ) 2 GaC MAX phase solid solutions with x ranging up to 0.25 were successfully synthesized using a two-step sintering method. (Ti 1-x V x ) 2 GaC solid solutions grains showed a typical lamellar structure , where the a lattice constant of (Ti 1-x V x ) 2 GaC decreased from 3.0660 to 3.0326 Å and c decreased from 13.3223 to 13.1520 Å. The effects of V content on the solid solution microstructure, crystal structure, mechanical strength, and resistance to friction and wear were evaluated in detail. In addition, the solid solution formation mechanism and fracture damage modes of these materials were discussed. The crystal structure, mechanical properties, electronic properties, and chemical bonding of (Ti 1-x V x ) 2 GaC continuous solid solution at x = 0–1 were calculated by DFT. The solid solution enhancement mechanism of (Ti 1-x V x ) 2 GaC was explained by analyzing the relationship between the structure and properties.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Yang Xin,Huang Xin,Qiu Xiaoyan,Guo Quanquan,Zhang Xinxing
Porous materials with ultrahigh specific strength are highly desirable for aerospace, automotive and construction applications. However, because of the harsh processing of metal foams and intrinsic low strength of polymer foams, both are difficult to meet the demand for scalable development of structural foams. Herein, we present a supramolecular metallic foam (SMF) enabled by core-shell nanostructured liquid metals connected with high-density metal-ligand coordination and hydrogen bonding interactions, which maintain fluid to avoid stress concentration during foam processing at subzero temperatures. The resulted SMFs exhibit ultrahigh specific strength of 489.68 kN m kg −1 (about 5 times and 56 times higher than aluminum foams and polyurethane foams) and specific modulus of 281.23 kN m kg −1 to withstand the repeated loading of a car, overturning the previous understanding of the difficulty to achieve ultrahigh mechanical properties in traditional polymeric or organic foams. More importantly, end-of-life SMFs can be reprocessed into value-added products (e.g., fibers and films) by facile water reprocessing due to the high-density interfacial supramolecular bonding. We envisage this work will not only pave the way for porous structural materials design but also show the sustainable solution to plastic environmental risks.
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Journal of the American Chemical Society
·
2024
·
IF 14.4
Siqi Guo,Yuan Ji,Gengcheng Liao,Jian Wang,Zhong-Hui Shen,Xiang Qi,Christian Liebscher,Ningyan Cheng,Long Ren,Binghui Ge
Liquid metal (LM) nanodroplets possess intriguing surface properties, thus offering promising potential in chemical synthesis, catalysis, and biomedicine. However, the reaction kinetics and product growth at the surface of LM nanodroplets are significantly influenced by the interface involved, which has not been thoroughly explored and understood. Here, we propose an interface engineering strategy, taking a spontaneous galvanic reaction between Ga0 and AuCl4– ions as a representative example, to successfully modulate the growth of heterostructures on the surface of Ga-based LM nanodroplets by establishing a dielectric interface with a controllable thickness between LM and reactive surroundings. Combining high-resolution electron energy-loss spectroscopy (EELS) analysis and theoretical simulation, it was found that the induced charge distribution at the interface dominates the spatiotemporal distribution of the reaction sites. Employing tungsten oxide (WOx) with varying thicknesses as the demonstrated dielectric interface of LM, Ga@WOx@Au with distinct core–shell-satellite or dimer-like heterostructures has been achieved and exhibited different photoresponsive capabilities for photodetection. Understanding the kinetics of product growth and the regulatory strategy of the dielectric interface provides an experimental approach to controlling the structure and properties of products in LM nanodroplet-involved chemical processes.
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MATERIALS LETTERS
·
2025
·
IF 2.7
Guangyin Liu,Yuhui Zhang,Tao Huang,Jun Shen
Ga-based liquid metal (LM) suffers from severe corrosiveness toward chips and heatsink metals, posing a major obstacle to its practical use. Herein, we propose MXene films as barrier layers to mitigate Ga-induced corrosion. Combining first-principles density functional theory and experimental analyses, anti-corrosion performance and reliability were systematically evaluated. MXene nanosheets were found to self-assemble on Cu surfaces via van der Waals interactions, providing an interfacial adhesion force of 17.23 mN. The coatings effectively inhibit Ga corrosion while maintaining high thermal conductivity and long-term stability. This strategy offers a simple and efficient solution to corrosion issues in Ga-based TIM applications.
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ADVANCED MATERIALS
·
2025
·Vol. 37
·期 27
·2420505
·
IF 26.8
Xin Gao,Kaiming Wang,Kun Zhai,Junxin Yan,Dongdong Yue,Congpu Mu,Zhipeng Yu,Yingchun Cheng,Anmin Nie,Zhongyuan Liu
Emergent magnetism in 2D materials has attracted significant attention due to their intrinsic magnetic order, which persists down to the monolayer limit, and their potential applications in spintronic devices. In particular, domain structure modulation plays a crucial role in 2D magnet-based nano-spintronic devices. However, the fabrication and modulation of the desired domain structure, along with the establishment of reliable electrical write/read operations, remain significant challenges. Herein, a unique structure-shaping way to modulate domain structure is demonstrated via folding a continuous flat Fe 3 GaTe 2 nanosheet. Accompanied by magnetic domain structure transformation, the symmetric butterfly-shaped magnetoresistance (MR) curve changes to an antisymmetric field-dependent magnetoresistance. Notably, the MR exhibits either the same or opposite sign at geometrically equivalent positions, depending on the relative angle of the current flow and domain wall direction. The MR behavior with respect to sweeping field and electrodes position is due to the circulating current in the vicinity of the domain wall. More importantly, this new concept of manipulating domain structure and its associated magneto-transport behavior can inspire novel spintronic devices fabrication and application.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Hanchen Xu,Hongwei Shou,Ziwei Yan,Kefu Zhu,Chuanqiang Wu,Wei Jiang,Zhanfeng Liu,Shiqiang Wei,Jialin Shi,Hassan Akhtar,Changda Wang,Li Song
Two-dimensional transition metal carbides and nitrides (MXenes) have attracted significant attention due to their exceptional physicochemical properties. Despite extensive studies, efficient methods for the production of MXenes with precise structural control still remain a challenge, thus hindering their potential in many specific applications. Herein, a halogen ion-mediated hydrothermal approach is proposed for the controllable preparation of diverse MXenes and their heterostructures with well-defined interfacial architectures, demonstrating its potential as a high-throughput synthesis strategy. As proof of concept, Mo 2 C can be synthesized on a gram scale by employing NH₄F in the hydrothermal etching process of Mo 2 Ga 2 C. Subsequently, this approach is applied to various MXenes, including Ti 3 C 2 , V 2 C, and Nb 4 C 3 . Moreover, NH 4 X (X = Cl, Br, I) etchants combined with small-molecule intercalants enabled the targeted synthesis of MXene-based heterostructures, such as Mo 2 CT x @MoS 2 featuring ≈15 nm amorphous MoS 2 surface layers. Notable, the Mo 2 CT x (Br) heterostructure exhibited outstanding electrochemical stability, delivering a capacity of 465.5 mAh g⁻¹ after 300 cycles at 1 A g⁻¹, and achieving high coulombic efficiency of 99.8% during lithium-ion battery cycling. This work establishes a versatile and scalable platform for the synthesis of MXene-based materials, thus paving the way for accelerating their potential in various fields.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Hanzhang Zhao,Chao Yang,Yadong Liu,Qiaoqiao Wang,Yongyi Wu,Qiuxuan Mu,Feiyan Hou,Tai Min,Tao Li
Multiferroic heterostructures offer a promising platform for next-generation low-power spintronic devices by enabling electric-field control of magnetism. While recent advances in two-dimensional (2D) van der Waals (vdW) magnetic and ferroelectric materials have sparked significant interest, achieving reliable and nonvolatile electrical modulation of magnetism at room temperature within vdW multiferroic heterostructures remains a substantial challenge. Here, this study demonstrates robust, reproducible, and nonvolatile electrical control of ferromagnetism in Fe 3 GaTe 2 /CuInP 2 S 6 multiferroic heterostructures under ambient conditions. The modulation is evidenced macroscopically by reshaped magnetic hysteresis loops in anomalous Hall voltage measurements and microscopically by in situ magnetic and electric field-induced domain evolution captured via magnetic force microscopy. The first-principles calculations reveal that the polarization of CuInP 2 S 6 induces a significant modulation of the Dzyaloshinskii-Moriya interaction (DMI) in Fe 3 GaTe 2 . Incorporating these effects into micromagnetic simulations reproduces key features of the experimental hysteresis behaviors, indicating that the polarization-enhanced DMI lowers domain wall formation energy and drives a transition from coherent to incoherent magnetic reversal. These findings not only surmount the challenge of electrically modulating ferromagnetism in vdW systems via remanent ferroelectric polarization at room temperature but also open new pathways for energy-efficient skyrmion manipulation and vdW spintronic device engineering.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 28
·2501047
·
IF 19
Jiantao Du,Kun He,Junyang Chen,Yangkun He,Miao He,Xitong Xu,Zhe Qu,Lin Gu,Qinghua Zhang,Xidong Duan,Mingyuan Huang,Chengbao Jiang,Bo Li,Shengxue Yang
Van der Waals (vdW) magnets have opened up new avenues for exploring next-generation spintronic devices. The exchange bias (EB) effect plays an undisputed role in ensuring accurate data retrieval in spintronic devices. However, the unsustainably weak EB field ( H EB ) introduced by field cooling and the high-complexity of devices incompatible with silicon-based industry, limit the application of related vdW spintronic devices. Here, a compatible and simple method is reported for constructing Fe 3 GaTe 2 /oxidized Fe 3 GaTe 2 heterostructures and achieving a spontaneous EB effect with a low-complexity device configuration. The spontaneous EB effect exhibits undecayed, tunable, and giant H EB of 2550 Oe at 3 K, along with a relatively high blocking temperature of 220 K. Field cooling and cross-sectional microstructure studies suggest that the EB effect arises from antiferromagnetic exchange coupling between Fe 3 GaTe 2 and spin clusters frozen by α-Fe 2 O 3 at the disordered interface. This work provides a unique avenue for customizing, integrating, and producing related spintronic devices.
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JOURNAL OF CRYSTAL GROWTH
·
2024
·
IF 1.7
Mengran Sun,Jinlong Shi,Jindong Chen,Chunxiao Li,Jiyong Yao
Infrared nonlinear optical crystals are widely used in all-solid-state lasers as pivotal devices for laser frequency conversion. BaGa 4 Se 7 (BGSe) crystal has attracted much attention due to its excellent optical properties. However, the presence of point defects in BGSe increases the absorption loss and reduces the laser-induced damage threshold, thus limiting its practical application in high-power mid- and far-infrared lasers. Therefore, it is crucial to reveal the types of defects and their formation mechanisms in BGSe crystal, which is conducive to the design of rational strategies to improve the crystal quality. In this work, the defect activation energies were calculated by photoluminescence (PL) spectroscopy and the existence of three types of defects, Ga Ba , V Se and V Ba were verified in the as grown BGSe crystal. Therefore, a thermal annealing process under BaSe vapor was rationally designed to compensate for the loss of Ba and Se elements and to reduce the defect concentration in BGSe. In addition, the changes of defects in BGSe crystal were determined by X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectroscopy. All the experimental results confirm that the defect concentration in BGSe decreases greatly and the crystal quality is significantly improved after annealing in BaSe vapor.
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Advanced Science
·
2024
·Vol. 11
·期 28
·2401436
·
IF 14.3
Yihan Wang,Lang Chu,Si Meng,Mingxuan Yang,Yidan Yu,Xiaokang Deng,Cheng Qi,Tiantian Kong,Zhou Liu
Yarn-woven triboelectric nanogenerators (TENGs) have greatly advanced wearable sensor technology, but their limited sensitivity and stability hinder broad adoption. To address these limitations, Poly(VDF-TrFE) and P(olyadiohexylenediamine (PA66)-based nanofibers coaxial yarns (NCYs) combining coaxial conjugated electrospinning and online conductive adhesive coating are developed. The integration of these NCYs led to enhanced TENGs (NCY-TENGs), notable for their flexibility, stretchability, and improved sensitivity, which is ideal for capturing body motion signals. One significant application of this technology is the fabrication of smart insoles from NCY-TENG plain-woven fabrics. These insoles are highly sensitive and possess antibacterial, breathable, and washable properties, making them ideal for real-time gait monitoring in patients with diabetic foot conditions. The NCY-TENGs and their derivatives show immense potential for a variety of wearable electronic devices, representing a considerable advancement in the field of wearable sensors.
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ADVANCED MATERIALS
·
2025
·
IF 26.8
Kai-Yao Wang,Jing-Jing Li,Feng-Qi Shi,Yi-Ming Zhao,Ze-Yu Wang,Xin-Rong Zhang,Lin Cheng,Cheng Wang
Dimensionally adjustable channels are incorporated into a crystalline lattice via strategic stacking of wrinkled layers, boosting rare earth element (REE) ion exchange performance due to the eliminated energy-intensive dehydration and channel rigidity. In [(CH 3 ) 2 NH 2 ] 2 Ga 2 Sb 2 S 7 ( GaSbS-1 ), the lone electron pair (LEP) on Sb 3+ in the trigonal pyramidal {SbS 3 } influences Ga─S bond orientations, creating wrinkled [Ga 2 Sb 2 S 7 ] n 2 n − layers. Staggered stacking forms parallel channels occupied by [(CH 3 ) 2 NH 2 ] + cations, facilitating outstanding exchange for REE 3+ ions (Y 3+ , La 3+ −Lu 3+ ). Dynamic interlamellar expansion endows GaSbS-1 with remarkable kinetics ( R = 97.14%–99.40% within 5 min; k 2 = 2.592–3.462 g mg −1 min −1 ) and capacities (63, 125, 143, and 138 mg g −1 ) for Y 3+ , Ce 3+ , Eu 3+ , and Tm 3+ . It exhibits structural stability across pH = 2–12, with K d values > 10 4 –10 5 mL g −1 at pH = 4–9, and superior selectivity for REE 3+ over competing ions. Performance remains robust in real aqueous environments, including sea water, with maximum REE 3+ removal rates >90%. Rapid kinetics enable efficient column filtration ( R = 93.10%–98.51%) and recycling capability. The GaSbS-1 /PTFE membrane achieves 99.71%–99.95% removal of trace REE 3+ at 1.38 mL min ‒1 cm ‒2 (0.17 s contact time). With high yield, irradiation resistance, and facile elution, GaSbS-1 is a proof-of-concept exchanger for purifying REE-contaminated radioactive wastewater.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qinglin Lu,Hao Zhang,Jinrui Du,Jiachen Huang,Rong Fan,Weiqing Zhou,Xiangming Na,Caiyun Wang,Yinhua Wan,Jianquan Luo
Protein-based therapeutics, including monoclonal antibodies, enzymes, and cytokines, often require concentration to achieve clinical efficacy, improve stability and administration efficiency. Ultrafiltration (UF) is the mainstream technique for protein concentration, but its efficiency remains limited by severe flux decline and protein loss. This study demonstrates that, during the re-concentration process, fouling resistance arising from severe concentration polarization and cake layer formation, rather than the intrinsic membrane resistance, is the primary determinant of filtration flux. To alleviate this resistance, nano-protrusion arrays are patterned on the UF membrane via co-assembly of glutaraldehyde (GA) and hydroxypropyl cellulose (HPC), which act as a turbulence promoter to enhance localized shear forces while minimizing mechanical damage to proteins in the bulk solution. This approach effectively inhibits the formation of the cake layer and alleviated concentration polarization during protein concentration. Compared to the pristine membrane, the as-prepared membrane exhibits great anti-fouling performance with a 40.5 % increase in average permeate flux and a 57.0 % reduction in permeability decline after protein concentration. This work proposes an insightful approach to protein concentration and designing an anti-fouling UF membrane with a gentler filtration process, which holds promise for reducing protein denaturation and minimizing energy consumption by mitigating bulk turbulence.
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