Materials Research Express最新文献

Ultrasound-responsive piezoelectric thermosensitive PNIPAM/STO hydrogel for minimally invasive antibacterial therapy of neurogenic bladder 超声响应压电热敏PNIPAM/STO水凝胶用于神经源性膀胱的微创抗菌治疗

4区材料科学

Materials Research Express Pub Date : 2026-01-29 DOI: 10.1088/2053-1591/ae3f8b

Yangpeng Wu, Xiaoying Lin, Yanqian He, Jing Ruan

{"title":"Ultrasound-responsive piezoelectric thermosensitive PNIPAM/STO hydrogel for minimally invasive antibacterial therapy of neurogenic bladder","authors":"Yangpeng Wu, Xiaoying Lin, Yanqian He, Jing Ruan","doi":"10.1088/2053-1591/ae3f8b","DOIUrl":"https://doi.org/10.1088/2053-1591/ae3f8b","url":null,"abstract":"Abstract Neurogenic bladder secondary to spinal cord injury remains a significant clinical challenge, with current therapies limited by systemic side effects, invasiveness, or short-lived efficacy of single ultrasound intervention. This study developed a composite thermosensitive hydrogel, using poly(N-isopropylacrylamide as the matrix and strontium titanate piezoelectric nanoparticles as the functional component. At room temperature, the hydrogel exists as a flowable sol for minimally invasive bladder perfusion via catheter, at physiological temperature 37 °C, it rapidly forms a gel to adhere tightly to the bladder mucosa, avoiding flushing by urine. Triggered by low-frequency ultrasound, strontium titanate nanoparticles exhibit a piezoelectric effect inducing charge separation, which catalyzes reactive oxygen species generation to exert antibacterial effects. Cytocompatibility tests via CCK-8 showed high viability of cells, exceeding 90%. Antibacterial experiments demonstrated over 80% antibacterial rate against Escherichia coli and effective inhibition of biofilm formation. This ultrasound-responsive piezoelectric thermosensitive hydrogel provides a promising minimally invasive strategy for addressing neurogenic bladder-related issues.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"13 3","pages":"035404-035404"},"PeriodicalIF":0.0,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147381464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced organic dye adsorption and recyclability of coal gasification fine slag via biomass modification and binder granulation 通过生物质改性和粘结剂造粒提高煤气化细渣对有机染料的吸附和可回收性

4区材料科学

Materials Research Express Pub Date : 2025-11-01 DOI: 10.1088/2053-1591/ae20de

Jimin Xue, Gang He, Dongsheng Wu, Ling Zhang, Jing Yang

{"title":"Enhanced organic dye adsorption and recyclability of coal gasification fine slag via biomass modification and binder granulation","authors":"Jimin Xue, Gang He, Dongsheng Wu, Ling Zhang, Jing Yang","doi":"10.1088/2053-1591/ae20de","DOIUrl":"https://doi.org/10.1088/2053-1591/ae20de","url":null,"abstract":"Abstract CGFS is typically generated as a fine powder that can disperse into air and water, creating dust pollution, material loss, and secondary contamination. During wastewater treatment, these ultrafine particles resist solid–liquid separation, making recovery and reuse challenging and undermining process stability. To address this issue, we prepared a composite granular adsorbent (HKCGFS-S-B) by sequentially treating CGFS with high-concentration acids and bases (9 mol l −1 HCl then 10 mol l −1 KOH), blending the modified CGFS with 20% pine sawdust by mass, and granulating with a PVA/HPC binder at a 4:3 mass ratio. The resulting pellets maintained high adsorption capacity and mechanical stability over repeated reuse cycles. Under batch conditions (100 mg l −1 initial dye concentration, 328 K, pH 7, and a contact time of 24 h), the adsorbent exhibited strong performance, with capacities of 86.6, 83.0 and 59.3 mg g −1 for Neutral Red, Rhodamine B, and Reactive Brilliant Orange, respectively. Under the same conditions, the adsorbent maintained removal efficiencies above 75%, 67%, and 52% after eight adsorption–desorption cycles. Mechanistic investigation revealed that physisorption was the dominant removal process, as supported by kinetic data fitting the pseudo-first-order model and equilibrium data conforming to the Freundlich isotherm. Physicochemical analysis confirmed that the material possessed a porous carbon structure enriched with silico-aluminate minerals, a specific surface area of 130.51 m 2 g −1 and a pore volume of 0.14 cm 3 g −1 . This work presents a practical strategy for upcycling industrial waste into a durable, high-capacity adsorbent, offering a potential solution for effective wastewater remediation.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 11","pages":"115506-115506"},"PeriodicalIF":0.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147331001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of silanized nano-Al₂O₃ fillers on the mechanical properties and printing accuracy of photopolymer resins for 3D printing dental applications 硅化纳米al2o3填料对牙科3D打印光聚合物树脂力学性能和打印精度的影响

4区材料科学

Materials Research Express Pub Date : 2025-08-01 DOI: 10.1088/2053-1591/adf709

Shijun Ji, Jingyi Ren, Jing Zhang, Wenjuan Zhou, Zhonghao Liu

{"title":"Effects of silanized nano-Al2O3 fillers on the mechanical properties and printing accuracy of photopolymer resins for 3D printing dental applications","authors":"Shijun Ji, Jingyi Ren, Jing Zhang, Wenjuan Zhou, Zhonghao Liu","doi":"10.1088/2053-1591/adf709","DOIUrl":"https://doi.org/10.1088/2053-1591/adf709","url":null,"abstract":"Abstract Three-dimensional (3D) printing dental applications are broadly applied in multiple specialties of dentistry facilitating diagnosis and treatment greatly. However, the current photopolymer materials for 3D printing dental applications often fail to yield the required quality due to their inferior mechanical properties. Thus, this study aims to explore the effects of silanized nano-Al 2 O 3 fillers on the mechanical properties and printing accuracy of one of the most commonly used photopolymer resins, polyurethane acrylate (PUA). The modification of nano-Al 2 O 3 particles by the silane coupling agent was characterized by Fourier-transform infrared spectroscopy (FTIR) and thermogravimetric (TGA) analysis. Then, specimens were fabricated using PUA resins with 0 wt% (control), 2 wt%, 4 wt%, and 6 wt% silanized nano-Al 2 O 3 fillers. The effects of silanized nano-Al 2 O 3 fillers on the mechanical properties of the photopolymer resins were evaluated by Shore D hardness, tensile strength, and flexural strength tests. Moreover, the printing accuracy was assessed by the root-mean-square error (RMS) analysis. The results showed that the mechanical properties of the photopolymer resins were significantly improved when loaded with silanized nano-Al 2 O 3 fillers. The highest values were observed in the resin with 4 wt% filler content, improving hardness, tensile strength, and flexural strength by 11.7%, 31.1%, and 39.9%, respectively. For printing accuracy, loading 2 wt% and 4 wt% fillers did not influence the printing accuracy significantly. However, the incorporation of 6 wt% fillers compromised the printing accuracy. Within the limits, this study has demonstrated that the incorporation of silanized nano-Al 2 O 3 fillers can enhance the mechanical performance of photopolymer resins, indicating the potential of this material for improved quality of 3D printing dental applications.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 8","pages":"085401-085401"},"PeriodicalIF":0.0,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Effect of silver metavanadate on the performance of PDLC films 偏氰酸银对PDLC薄膜性能的影响

4区材料科学

Materials Research Express Pub Date : 2025-07-17 DOI: 10.1088/2053-1591/adf177

Nan Sun, Zuowei Zhang, Huai Yang

{"title":"Effect of silver metavanadate on the performance of PDLC films","authors":"Nan Sun, Zuowei Zhang, Huai Yang","doi":"10.1088/2053-1591/adf177","DOIUrl":"https://doi.org/10.1088/2053-1591/adf177","url":null,"abstract":"Abstract This study systematically investigates the synergistic effects of silver metavanadate (AgVO 3 ) nanowires on the photopolymerization kinetics and electro-optical performance of polymer-dispersed liquid crystal (PDLC) films. AgVO 3 nanowires were synthesized via hydrothermal methods and incorporated into PDLC composites alongside the conventional photoinitiator Irgacure 651. Six formulations (0–0.55 wt% AgVO 3 ) were characterized for microstructural evolution and electro-optical responses. Results demonstrate that AgVO 3 ’s narrow bandgap (2.3 eV) enables visible-light-activated photocatalysis, complementing Irgacure 651’s UV-initiated polymerization through three mechanisms: 1) Broad-spectrum photon harvesting (250–550 nm), 2) Radical multiplication from hydroxyl radicals (·OH) and initiator-derived species, and 3) Redox-mediated chain propagation. At loadings ≤0.4 wt%, accelerated polymerization kinetics optimized phase separation dynamics, yielding uniform submicron liquid crystal domains (diameters <200 nm) with enhanced interfacial anchoring. This improved contrast ratio by 5% (CR = 188) while reducing saturation voltage to 20.4 V. Excessive loading (>0.4 wt%) induced premature gelation through uncontrolled polymerization, creating suboptimal microdomains (<100 nm) that increased charge trapping density, elevating driving voltage by 175% (40 V μm −1 ). The dual-threshold behavior highlights a critical balance between photocatalytic acceleration and phase separation dynamics. This work establishes AgVO 3 -Irgacure 651 hybrids as an energy-efficient paradigm for PDLC manufacturing, enabling spectral-tunable curing processes compatible with industrial ‘lights-out’ automation. The findings provide fundamental insights into nanofiller-mediated photopolymerization control for next-generation smart windows with enhanced optical modulation and antimicrobial potential.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 9","pages":"096402-096402"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Exploring the limits of magnetic levitation: submicron particle separation and density profiling. 探索磁悬浮的极限：亚微米粒子分离和密度剖面。

IF 1.8 4区材料科学

Materials Research Express Pub Date : 2025-05-01 Epub Date: 2025-05-09 DOI: 10.1088/2053-1591/add2d8

Samantha Velazquez, Ali Akbar Ashkarran

{"title":"Exploring the limits of magnetic levitation: submicron particle separation and density profiling.","authors":"Samantha Velazquez, Ali Akbar Ashkarran","doi":"10.1088/2053-1591/add2d8","DOIUrl":"https://doi.org/10.1088/2053-1591/add2d8","url":null,"abstract":"The size of particles plays a critical role in the time required to achieve stable levitation in magnetic levitation (MagLev) systems and significantly affects its practical applications, particularly in biological systems. There is a debate on the minimum size of the objects that can be levitated in a reasonable time period (e.g., <24 h). This challenge is particularly relevant in biological applications, where the small size of most biomolecules and the effects of Brownian motion pose significant concerns for biocompatibility. To address this issue, we have studied the lower limit of particle size possible for accurate density calculations using a ring MagLev system. Specifically, we examined commercially available polystyrene particles with known densities and identical physical properties, varying only in size from the microscale to the nanoscale. Our results demonstrate that although smaller particles (e.g., ∼200 nm) take considerably longer to achieve stable levitation compared to larger particles (e.g., 10 μm), they reach similar levitation heights, confirming the reliability of MagLev-based density measurements for submicron particles. Understanding the correlation of size and levitation time enables us to design/modify the MagLev experiments to minimize the exposure time of objects/particles to paramagnetic solutions, which is of key importance in the biomedical applications of MagLev systems.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 5","pages":"056101"},"PeriodicalIF":1.8,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12064282/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144033398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simple fabrication of bimetallic metal-organic framework derived magnetic flower-like composites for selective adsorption of hemoglobin: isotherm, kinetic, and thermodynamic studies 用于选择性吸附血红蛋白的双金属金属-有机骨架衍生磁性花状复合材料的简单制备：等温线、动力学和热力学研究

4区材料科学

Materials Research Express Pub Date : 2025-03-01 DOI: 10.1088/2053-1591/adbdad

Qi Yang, Zhao Wang, Yang Li, Yue Zhu, Han Cao, Yao Wu

{"title":"Simple fabrication of bimetallic metal-organic framework derived magnetic flower-like composites for selective adsorption of hemoglobin: isotherm, kinetic, and thermodynamic studies","authors":"Qi Yang, Zhao Wang, Yang Li, Yue Zhu, Han Cao, Yao Wu","doi":"10.1088/2053-1591/adbdad","DOIUrl":"https://doi.org/10.1088/2053-1591/adbdad","url":null,"abstract":"Abstract An abnormal level of well-known his-rich protein, hemoglobin is related to various diseases. Efficient isolation of hemoglobin is of great significance in early disease diagnosis and biomedical analyses. Developing high-performance adsorption materials has become a research hotspot at present. This study proposes a facile pyrolysis-based strategy to prepare novel magnetic flower-like composites for selective hemoglobin separation. Methoxy-polyethylene glycol-carboxyl (PEG) can impart adhesion resistance to improve adsorption selectivity due to its unique ethylene oxide groups and the repulsive elastic forces from compression of the brush-like chains. Two types of magnetic composites were constructed from bimetallic metal–organic frameworks utilizing Co 2+ and Ni 2+ ions as magnetic sources and metal nodes, as well as modification with or without PEG. The properties of the two composites were demonstrated via FTIR, SEM, TEM, DLS, XPS, TGA, BET, and VSM analyses, including flower-like morphology, uniform size (∼2 μm), good dispersibility, porous structure, large surface area, and good magnetic responsiveness. The protein adsorption capacity was further investigated from material factor including the composites modified with/without PEG and environmental factors including incubation time, protein concentration and incubation temperature. Moreover, the adsorption behaviors were explored by kinetics and thermodynamic analysis. Both the PEG-modified and non-PEG-modified composites were effective magnetic adsorbents for selective hemoglobin separation, besides exhibited different adsorption mechanism due to introduction of PEG which induced non-spontaneous selective adsorption rather than spontaneous pure physical adsorption. The magnetic bimetallic MOF system shows promise for isolating His-rich proteins from complex biological systems.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 3","pages":"035401-035401"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential applications of PLGA/PVA coaxial nanofibers with controlled release for guiding tissue regeneration 可控释放PLGA/PVA同轴纳米纤维在指导组织再生中的潜在应用

4区材料科学

Materials Research Express Pub Date : 2025-01-01 DOI: 10.1088/2053-1591/ada5bc

Huinan Zhang, Dongchao Ji, Kunlong Zhao, Zhuoheng Li, Shuo Yang, Peng Wang, Wenxin Cao, Yu Sun

{"title":"Potential applications of PLGA/PVA coaxial nanofibers with controlled release for guiding tissue regeneration","authors":"Huinan Zhang, Dongchao Ji, Kunlong Zhao, Zhuoheng Li, Shuo Yang, Peng Wang, Wenxin Cao, Yu Sun","doi":"10.1088/2053-1591/ada5bc","DOIUrl":"https://doi.org/10.1088/2053-1591/ada5bc","url":null,"abstract":"Abstract Biomedical scaffolds are increasingly used in bone repair due to their exceptional ability to support cell growth and proliferation. This study developed a multifunctional poly(lactic-co-glycolic acid) (PLGA)/polyvinyl alcohol (PVA)/metronidazole coaxial electrospun nanofiber membrane to overcome the limitations of current bone tissue self-repair mechanisms. Optimization of the coaxial electrospinning parameters significantly improved the membrane’s overall performance. Mechanical property testing revealed that the tensile strength increased from 4.304 ± 0.079 MPa to 6.915 ± 0.032 MPa as the shell layer feeding rate was increased. Drug release studies demonstrated a marked reduction in the initial burst release of metronidazole as the shell layer thickness increased. The release amount decreased from 86% to 34% by the third hour, and the release continued over the course of one week. Furthermore, the in vitro release model transitioned from first-order kinetics to Peppas-Sahlin kinetics. In vitro studies confirmed that the metronidazole-loaded coaxial fiber membrane exhibited excellent biocompatibility, antibacterial properties, and osteogenic potential. In conclusion, PLGA/PVA controlled-release nanofiber membranes loaded with antibacterial drugs offer great promise for bone tissue regeneration therapies.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 1","pages":"015403-015403"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://iopscience.iop.org/article/10.1088/2053-1591/ada5bc/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147334104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Study on the mechanical properties of layered gradient structure PBT-based flame retardant composite materials 层状梯度结构pbt基阻燃复合材料力学性能研究

4区材料科学

Materials Research Express Pub Date : 2024-11-13 DOI: 10.1088/2053-1591/ad9241

Peng Cui, Lei Niu, Shibo Ren

{"title":"Study on the mechanical properties of layered gradient structure PBT-based flame retardant composite materials","authors":"Peng Cui, Lei Niu, Shibo Ren","doi":"10.1088/2053-1591/ad9241","DOIUrl":"https://doi.org/10.1088/2053-1591/ad9241","url":null,"abstract":"Abstract Polybutylene Terephthalate (PBT) was widely used for its excellent mechanical properties, low moisture absorption, and good chemical corrosion resistance. To enhance the flame retardancy of PBT while addressing the decrease in mechanical properties caused by flame retardants, this study employed brominated polystyrene (BPS) as the flame retardant and modified nano-antimony trioxide (nano-Sb 2 O 3 ) as a synergistic flame retardant. These were added to PBT, and a gradient distribution of nano-Sb 2 O 3 was achieved through lamination hot-pressing technology. The effects of this gradient distribution on the flame retardancy and mechanical properties of the composite materials were investigated. The results show that the modifiers Cetyltrimethylammonium bromide (CTAB) and γ -Glycidoxypropyltrimethoxysilane (KH560) successfully graft onto the nano-Sb 2 O 3 surface, enhancing its compatibility with the matrix material. Compared to the homogeneous composite materials, the gradient composites exhibit an increased Limiting Oxygen Index (LOI), with the most significant improvement seen in the composite (G828) that has a 6 wt% difference in concentration between the outer and inner layers, increasing the LOI by 6%. Additionally, as the concentration of nano-Sb 2 O 3 on the surface of the composite material increases, so does the amount of char residue. Compared to homogeneous composites, the gradient composites show significant improvements in mechanical properties, with G828 exhibiting increases of 19.7% in tensile strength, 37.1% in bending strength, and 103% in impact strength, demonstrating the significant effect of the gradient distribution in enhancing both flame retardancy and mechanical properties of the composite material.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"12 1","pages":"015306-015306"},"PeriodicalIF":0.0,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Y content on microstructure evolution and tensile properties of Mg-8Li-3Al-2Sn-xY alloys Y 含量对 Mg-8Li-3Al-2Sn-xY 合金微观结构演变和拉伸性能的影响

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-17 DOI: 10.1088/2053-1591/ad78b2

Yang Zhang, Shunping Sun and Xiaoyang Chen

{"title":"Effect of Y content on microstructure evolution and tensile properties of Mg-8Li-3Al-2Sn-xY alloys","authors":"Yang Zhang, Shunping Sun and Xiaoyang Chen","doi":"10.1088/2053-1591/ad78b2","DOIUrl":"https://doi.org/10.1088/2053-1591/ad78b2","url":null,"abstract":"The design of new ultra-light Mg-Li alloys have great significance in aerospace and other fields. In this paper, Sn and Y elements were simultaneously added into Mg-8Li-3Al (wt%) alloy and the effect of Y content on microstructure evolution and tensile properties of Mg-8Li-3Al-2Sn-xY (wt%) alloys was studied. The as-cast Mg-8Li-3Al-2Sn alloy is composed of α-Mg + β-Li duplex-phase matrix, fine MgLiAl2 phase and coarse fishbone-like Li2MgSn phase. As Y element is added, granular Al2Y phase is formed, and grain size of α-Mg phase decreases significantly with shape changing from well-developed coarse dendritic to equiaxed dendritic. After hot extrusion, α-Mg phase is elongated along the extrusion direction, and β-Li phase undergoes complete dynamic recrystallization and transforms into fine equiaxed grains. The addition of 0.5% Y improves the tensile properties of as-cast Mg-8Li-3Al-2Sn-0.5Y alloy. However, the tensile properties show a downward trend with further increase of Y content. Hot extrusion significantly enhances the tensile properties of Mg-8Li-3Al-2Sn-xY alloys. Similarly, strength reaches the highest when the Y content is 0.5% for extruded Mg-8Li-3Al-2Sn-xY alloys.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"26 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced the sensing sensitivity of the metamaterial absorbers with patterned convex graphene in the terahertz 用图案化凸石墨烯提高超材料吸收器的太赫兹传感灵敏度

IF 2.3 4区材料科学

Materials Research Express Pub Date : 2024-09-17 DOI: 10.1088/2053-1591/ad7922

Yun Liu, Shilin Ma, Zuhong Xiong, Bin Xiong and Lihong Cheng

{"title":"Enhanced the sensing sensitivity of the metamaterial absorbers with patterned convex graphene in the terahertz","authors":"Yun Liu, Shilin Ma, Zuhong Xiong, Bin Xiong and Lihong Cheng","doi":"10.1088/2053-1591/ad7922","DOIUrl":"https://doi.org/10.1088/2053-1591/ad7922","url":null,"abstract":"In this paper, a patterned graphene metamaterial terahertz absorber is theoretically designed. The proposed absorber consists of a gold layer, a dielectric layer of SiO2, and graphene. The sensing sensitivity of the proposed absorber is simulated for the absence and presence of a square convex nanostructure, trapezoidal convex nanostructure, and rounded convex nanostructure. The sensitivity comparison between convex and absent convex nanostructures is studied, compared to no convex nanostructure, the simulated results show that the sensing sensitivity can be improved with the convex nanostructures, it is found that the absorber has two obvious absorption peaks, and it is insensitive to TE and TM polarization, and the maximum sensitivity corresponding to low-frequency and high-frequency modes is 0.911 THz RIU−1 and 1.561 THz RIU−1, respectively. Our work will play an important role in improving the sensing sensitivity of the graphene metamaterial absorber. Meanwhile, it can also greatly promote the application of biological sensing, modulation, integrated photodetectors, frequency selectors, sensors, filters and so on.","PeriodicalId":18530,"journal":{"name":"Materials Research Express","volume":"19 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0