Journal of Materials Science最新文献

{"title":"Impact of gamma irradiation on operating 255 nm AlGaN UV LEDs: defect analysis via DLTS and admittance spectroscopy","authors":"Wei Wu,&nbsp;Dekun Luo,&nbsp;Min Li,&nbsp;Xuhong Hu,&nbsp;Jianyu Deng,&nbsp;Wenhong Sun","doi":"10.1007/s10853-025-11414-3","DOIUrl":"10.1007/s10853-025-11414-3","url":null,"abstract":"<div><p>We investigated the effects of gamma (γ) ray irradiation on 255 nm AlGaN UV LEDs under various stress conditions, including current stress and combined irradiation and current stress. Our results show that the LEDs are similarly impacted by all conditions, with powered devices exhibiting significant changes in both optical and electrical properties. Deep Level Transient Spectroscopy (DLTS) was used to analyze defects, revealing that γ-ray exposure and other stresses primarily affect the active region and p-side of the device. The observed effects are attributed to an increase in hole traps associated with gallium vacancy complexes at 0.67 eV and nitrogen vacancies associated with active regions (V_N traps) at 0.2 eV. These defect concentrations alter the effective carrier concentration, accelerating degradation under electrical stress. Our findings provide new insights into the radiation tolerance of 255 nm AlGaN UV LEDs under various stress conditions.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18923 - 18932"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of Cu-5Fe (wt.%) fabricated by powder consolidation using high-pressure torsion","authors":"Amar Djemli,&nbsp;Hiba Azzeddine,&nbsp;Piotr Bazarnik,&nbsp;Foudil Sahnoune,&nbsp;Yi Huang,&nbsp;Thierry Baudin,&nbsp;François Brisset,&nbsp;Megumi Kawasaki,&nbsp;Terence G. Langdon","doi":"10.1007/s10853-025-11534-w","DOIUrl":"10.1007/s10853-025-11534-w","url":null,"abstract":"<div><p>Bulk pure Cu and Cu-5Fe (wt%) materials were successfully fabricated at room temperature by powder consolidation using high-pressure torsion (HPT) processing through 30 turns under a pressure of 6 GPa. The microstructure, texture and mechanical properties of the fabricated bulk discs were systematically characterized across their diameters using electron backscatter diffraction, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Vickers microhardness. Additionally, their thermal stability was evaluated after annealing treatment at 500 °C for 6 h. The results show that two grain refinement stages occurred in the Cu disc accompanied by the formation of partial <i>A</i>-fibre (<span>({A}_{1}^{*})</span>/<span>({A}_{2}^{*})</span> and <i>A</i> components). The dynamic recrystallization was delayed in the Cu-5Fe disc owing to the pinning effect of Fe content. Consequently, the grain refinement was more effective, and the texture gradually developed the <i>B</i>,<i> A</i> and <span>({A}_{1}^{*})</span> components. The Cu-5Fe disc was harder than the Cu disc, and the microhardness increased across the disc diameter. Rapid grain growth with a high amount of Cu₂O oxide and retained texture were the main characteristics of the annealed Cu disc. The precipitation of Fe phase during annealing led to the development of a duplex microstructure at the centre and mid-radius positions and a stable microstructure at the edge of the Cu-5Fe disc. Eventually, the annealing texture was transformed into a complete <i>A</i>-fibre (<span>({A}_{1}^{*})</span>/<span>({A}_{2}^{*})</span> and <i>A/</i><span>(overline{A })</span> components) which was quite similar to the Cu disc. The microhardness decreased after annealing but it was more homogeneously distributed across the disc diameter than the HPT-processed disc. The results were discussed based on the different grain refinement mechanisms, static recrystallization mechanisms, solute elements, dislocations and annealing twins.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"19267 - 19293"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unlocking the photocatalytic applications by investigating physical properties of JHfO3 (J = Na, K, Rb, and Cs) perovskites: a computational study","authors":"Muhammad Khuram Shahzad,&nbsp;Shoukat Hussain,&nbsp;Abhinav Kumar,&nbsp;Bhavesh Kanabar,&nbsp;M. M. Rekha,&nbsp;Karthikeyan Jayabalan,&nbsp;Binayak Pattanayak,&nbsp;Vivek Pandey,&nbsp;Vineet Tirth,&nbsp;Mohamed Hussien","doi":"10.1007/s10853-025-11550-w","DOIUrl":"10.1007/s10853-025-11550-w","url":null,"abstract":"<div><p>Perovskite oxides greatly increase photocatalytic activity, despite the difficulties in creating effective photocatalysts for water splitting. The creation of inexpensive, earth-abundant photocatalysts for highly effective water splitting is crucial. By employing density functional theory (DFT) computations, we demonstrate that JHfO₃ (J = Na, K, Rb, and Cs) perovskite oxides have increased photocatalytic performance. These materials, which are indirect bandgap semiconductors, exhibit bandgap energies of 4.31, 4.28, 4.16, and 3.92 eV for Na, K, Rb, and Cs, accordingly. The band gap energies of JHfO₃ are supported by its electronic properties, making it suitable for photocatalytic applications. Effective light absorption (260,370.68 cm⁻¹ at 16.49 eV, 494,595.35 cm⁻¹ at 22.51 eV, 428,452.17 cm⁻¹ at 19.84 eV, and 412,577.81 cm⁻¹ at 16.55 eV), strong anisotropy (1.942, 1.133, 0.627, 0.112) GPa, and reflective (0.30, 0.56, 0.56, and 0.58 at 23.87, 23.94, 23.49, and 22.92 eV) qualities are all observed by optical inquiry, and these characteristics are encouraging for photocatalysts. Mechanical properties are also calculated which confirms the stability. The material's strong thermodynamic properties are highlighted by its high Debye temperature (429.562, 446.584, 421.622, 370.288) K, and melting point (780.425, 8210.738, 919.168, 986.501) K, which are responsible for its stability under a variety of circumstances. By highlighting JHfO₃'s adaptable qualities and creative potential, this study paves the way for future developments in water-splitting technologies and other photocatalytic uses.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18886 - 18906"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dependence of shear behavior and interface evolution on modulation period of Cu/Ta nanofilms","authors":"Kezhong Xu,&nbsp;Yuqi Zhou,&nbsp;Yuxin Chen,&nbsp;Jianguo Xie,&nbsp;Yuhan Gao,&nbsp;Fulong Zhu","doi":"10.1007/s10853-025-11570-6","DOIUrl":"10.1007/s10853-025-11570-6","url":null,"abstract":"<p>Cu/Ta nanofilms are widely used in microelectronics applications due to their excellent physical and mechanical properties. However, the lack of research on size-dependent shear responses limits the structural design of Cu/Ta nanofilms. In this paper, molecular dynamics simulations are conducted to explore shear behaviors and failure mechanisms of Cu/Ta nanofilms with different modulation periods (λ). The findings indicate that the incoherent Cu/Ta interface forms a periodic misfit dislocation network after relaxation. The shear stress–strain curves for the samples display two distinct yield points. The shear modulus remains insensitive to variations in λ. The yield strength and yield strain of the sample at λ = 15 nm are significantly higher than those in the other cases. Defects tend to nucleate at the heterointerface where stress is concentrated. The specimens undergo four deformation stages at different λ: elastic deformation, yield of Cu, yield of Ta, and plastic flow. The shear failure is primarily associated with the Ta layer. The dislocation density in Cu decreases as λ increases, while no clear trend is observed in Ta. The shear bands first propagate from the interface into Cu and then extend into Ta. Moreover, the degree of strain localization in constituent layers becomes more pronounced with increasing λ. This study reveals the atomic-scale shear failure mechanisms of Cu/Ta nanofilms under different λ, which provides important theoretical guidance for their shear-resistant design and practical applications.</p>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"19370 - 19386"},"PeriodicalIF":3.9,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Significant friction and wear reduction using mandelic acid–cyclic amidine protic ionic liquids in polyalphaolefin lubricants","authors":"Zijing Bai,&nbsp;Yumeng Wang,&nbsp;Yutong Zheng,&nbsp;Wenjing Wang,&nbsp;Jiaying Jian,&nbsp;Peng Gao,&nbsp;Zengyun Jian","doi":"10.1007/s10853-025-11521-1","DOIUrl":"10.1007/s10853-025-11521-1","url":null,"abstract":"<div><p>In this work, three novel mandelic acid–cyclic amidine-based protic ionic liquids (PILs) were synthesized through a straightforward proton-transfer reaction and further investigated as lubricant additives for PAO10. The results showed that these P and S-free PIL additives, featuring short alkyl chains, exhibited good solubility and tribological performance in PAO10 at only 0.5 wt% addition. Notably, compared to the performance of PAO10, the addition of mandelic acid – 1,8-diazabicyclo[5.4.0] undec-7-ene (DBU)-derived PIL could achieve a 60% reduction in the coefficient of friction and an 85% decrease in wear volume. Further analysis revealed that the unique <i>a</i>-hydroxyl acid and cyclic amidine structures produce multiple interactions, including proton acceptance, hydrogen bonding, electrostatic adsorption, and tribochemical reactivity; thus, formation of a powerful tribofilm including organic carbonaceous species and an inorganic iron oxides. Moreover, the renewable nature of mandelic acid, combined with the environmental-friendly and good tribological performance of these PILs, positions this work as a reference for the development of high-performance lubricant additives.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"19222 - 19235"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of boron-containing dopants on the structure and electrochemical properties of poly(3,4-ethylene dioxythiophene) (PEDOT)","authors":"Nurdan Cocuk,&nbsp;Yuhang Wu,&nbsp;Junghyun Lee,&nbsp;Quintin Baugh,&nbsp;David C. Martin","doi":"10.1007/s10853-025-11477-2","DOIUrl":"10.1007/s10853-025-11477-2","url":null,"abstract":"<div><p>The choice of doping agents used during electrochemical polymerization is a crucial factor affecting the ultimate performance of poly(3,4-ethylenedioxythiophene) (PEDOT) thin films. Boron-containing dopants are a versatile group of materials that make it possible to conveniently tune PEDOT film structure and properties. Here, we investigated how several boron-containing dopants affect the structure and properties of electrodeposited PEDOT. The dopants examined were sodium tetrafluoroborate (NaBF₄), sodium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate (NaTFPB), and sodium tetraborate (Na₂B₄O₇, Borax). We compared these results to a commonly used non-boron-containing dopant for PEDOT, lithium perchlorate (LiClO₄). After electrodeposition, overall rough PEDOT film surfaces with varied morphological features, depending upon the utilized dopants were generated based on SEM. The low-frequency impedances of all PEDOT-coated electrodes were at least one order of magnitude lower than those of bare electrodes. The lowest impedances were observed for PEDOT/ClO₄ and PEDOT/BF₄, correlated with their doping levels by reaching the maximum threshold of 33%. These two also had similar and higher areal-specific capacitances with the values of 9.4 and 10.3 mF/cm² than those of PEDOT/TFPB (3.3 mF/cm²) and PEDOT/B₄O₇ (0.2 mF/cm²) on smooth gold surfaces. Although their areal-specific capacitances were similar, the volumetric-specific capacitance of PEDOT/BF₄ was 284 F/cm³ and almost doubled that of PEDOT/ClO₄. For screen-printed electrodes, the areal-specific capacitance of PEDOT/TFPB was almost similar to the other two types, with the values of approximately 6.0 mF/cm². We also demonstrated that PEDOT/TFPB is a particularly promising material with comparable properties and better cyclic stability.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18946 - 18967"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10853-025-11477-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nanocatalysts in photocatalytic and electrochemical hydrogen production","authors":"Monika Sindhu,&nbsp;Meenakshi Gusain,&nbsp;Arpan Tewary","doi":"10.1007/s10853-025-11546-6","DOIUrl":"10.1007/s10853-025-11546-6","url":null,"abstract":"<div><p>With the growth in energy demand around the globe, researchers have highly developed interest in producing environmentally friendly hydrogen by water splitting. This review discusses the electrocatalytic and photocatalytic nanocatalyst for water splitting process for obtaining clean hydrogen from water and renewable energy sources. Cutting-edge materials that possess outstanding performance as sunlight-driven catalysts have been featured here including semiconductor nanoparticles, hybrid composites, carbon-based materials, and plasmonic nanostructures and approaches such as framework doping, nanocomposite design, and defect engineering. The emerging hybrid architectures integrating photo- and electrocatalysis, photoelectrochemical (PEC) devices, and system integrations relevant to fuel cells and renewable-powered electrolysis have been mapped. Sustainability controls such as circular economy feedstocks, life cycle/techno-economic assessment, and policy needs are discussed. Finally, we outline machine learning, in situ characterization, and earth-abundant catalyst platforms as cross-cutting directions to bridge laboratory advances with durable, scalable, and commercially viable hydrogen production.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 41","pages":"19514 - 19541"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145316272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of high-entropy powders on “rim-core” structure and properties of Ti(C,N)-Fe cemented carbide","authors":"Xiaobo Wu,&nbsp;Tao Zhou,&nbsp;Qing Li,&nbsp;Fanrong Tang,&nbsp;Jinhai Yang,&nbsp;Ming Chen,&nbsp;Wen Fu,&nbsp;Zeyu Zhou,&nbsp;Shuzhu Zhou","doi":"10.1007/s10853-025-11529-7","DOIUrl":"10.1007/s10853-025-11529-7","url":null,"abstract":"<div><p>Ti(C,N)-Fe cemented carbide, which high-entropy ceramic (HEC) powder partially replaces Ti(C,N) as the hard phase, was fabricated via powder metallurgy. This study investigates the influence of HEC powder on the microstructure and mechanical properties of Ti(C,N)-Fe cemented carbide. Experimental results indicate that with the increasing of HEC content, the morphology of hard-phase particles transitions from spherical to polygonal. Additionally, the rim phase and the binder phase in the Ti(C,N)-based carbide exhibit a semi-coherent relationship, suggesting a strong interfacial bonding. Notably, the optimal bonding strength between the hard phase and binder phase is achieved at 5 wt% HEC addition.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18841 - 18853"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256800","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research progress in two-dimensional materials","authors":"De-Bing Long,&nbsp;Hongyun Zhao,&nbsp;Jirong Zhang,&nbsp;Yawen Lei,&nbsp;Zhishan Zhou,&nbsp;Shuli Zhang,&nbsp;Ziying Yue,&nbsp;Shan Peng,&nbsp;Xiaolin Wu","doi":"10.1007/s10853-025-11392-6","DOIUrl":"10.1007/s10853-025-11392-6","url":null,"abstract":"<div><p>Since the discovery of graphene, two-dimensional (2D) materials have become a research hotspot in the fields of materials science, condensed matter physics, and nanotechnology. This article systematically reviews the structural characteristics, performance regulation methods, and application progress of 2D materials in fields such as electronics, magnetism, optics, and catalysis. The unique physical and chemical properties of typical 2D materials such as graphene, transition metal dichalcogenides (TMDs), hexagonal boron nitride (h-BN), and black phosphorus (BP) were discussed in detail, as well as the control of their magnetic, electronic structure, and optical properties through strain engineering, doping, interface effects, and other methods. In addition, this article summarizes the potential applications of 2D materials in spintronic devices, optoelectronic devices, energy storage and conversion, and analyzes the challenges currently faced in research, such as air stability and room temperature magnetic realization. Finally, the future development direction of 2D materials was discussed, including breakthroughs in multifunctional heterojunction design, high-performance device integration, and large-scale fabrication technology.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18561 - 18594"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review: 2D MXenes for biomedical applications—recent advances, challenges, and future perspectives","authors":"Sunil Kumar,&nbsp;Nitu Kumari,&nbsp;Christopher Alma Suranto,&nbsp;Syed Muhammad Zain Mehdi","doi":"10.1007/s10853-025-11461-w","DOIUrl":"10.1007/s10853-025-11461-w","url":null,"abstract":"<div><p>MXenes, a class of two-dimensional materials, have attracted significant attention in biomedical engineering due to their distinctive physicochemical characteristics. This review summarizes recent advances in MXene-based materials for healthcare applications, emphasizing their multifunctional roles in antibacterial protection, drug delivery, photothermal therapy, biosensing, and tissue regeneration. Key intrinsic properties of MXenes, including high electrical conductivity, tunable surface chemistry, hydrophilicity, mechanical flexibility, biocompatibility, antioxidant, bio-functionality, and antibacterial activity, make them ideal candidates for surface engineering. MXene coatings demonstrate broad-spectrum antibacterial activity via membrane disruption, reactive oxygen species (ROS) generation, and photothermal effects under light exposure. In therapeutic applications, their large surface area and photothermal conversion capability enable targeted, stimuli-responsive drug release and synergistic cancer treatment. Experimental studies indicate minimal hemolysis and excellent cytocompatibility, supporting safe biological interfacing. The review also discusses existing challenges, such as long-term stability, potential cytotoxicity, MXene oxidative degradation, and fabrication scalability. Finally, future directions are outlined to promote the development of safe, robust, and clinically translatable MXene-based coatings for biomedical use.</p></div>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":"60 40","pages":"18595 - 18637"},"PeriodicalIF":3.9,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}