Materials & Design最新文献_第7页

Microcellular TLCP/SiO2 for high-frequency communication design 用于高频通信设计的微蜂窝TLCP/SiO2

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-16 DOI: 10.1016/j.matdes.2025.114772

Jiayang Sun , Wenyu Zhong , Yichong Chen , Kuikui Fan , Dongdong Hu , Zhenhao Xi , Tao Gu , Ling Zhao

{"title":"Microcellular TLCP/SiO2 for high-frequency communication design","authors":"Jiayang Sun , Wenyu Zhong , Yichong Chen , Kuikui Fan , Dongdong Hu , Zhenhao Xi , Tao Gu , Ling Zhao","doi":"10.1016/j.matdes.2025.114772","DOIUrl":"10.1016/j.matdes.2025.114772","url":null,"abstract":"<div><div>With the development of high-frequency and high-speed communication technologies, especially in microwave/millimeter-wave applications, electronic devices face increased performance demands. Developing low dielectric materials with exceptional properties for these devices has become a significant challenge. Thermotropic liquid crystal polymers (TLCP) are promising due to their excellent high-frequency performance, while microcellular foaming technology is commonly used to enhance dielectric properties. In this study, TLCP was modified with ADR and nano-SiO<sub>2</sub>. The synergistic modification introduces long-chain branched structures and nucleation sites, improving matrix performance and optimizing foaming behavior. In addition, long-chain branched TLCP/SiO<sub>2</sub> foam has highly compressive properties, excellent dimensional stability, ultra-low dielectric stability at high frequencies, great flame retardant and wonderful high-temperature infrared thermal stealth performance. It is also found by simulation that the patch antenna with long-chain branched TLCP/SiO<sub>2</sub> foam substrate has excellent signal transmission performance. The transmission distance up to 4793 m, which is 5.8 times higher than pure TLCP before foaming, which presents a novel solution for high-frequency and high-speed communication. Furthermore, the long-chain branched TLCP/SiO<sub>2</sub> foams with significant performance is expected to be used in sophisticated technology fields such as wide-ranging applications in military, extreme conditions, aviation, microelectronic and other fields.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114772"},"PeriodicalIF":7.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Adenosine-loaded adhesive microfluidic hydrogel microspheres stimulate acupoint activation for pain management 腺苷负载的粘合剂微流体水凝胶微球刺激穴位激活疼痛管理

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-16 DOI: 10.1016/j.matdes.2025.114708

Xiujuan Li , Zehao Chen , Songgen Chen , Han Wang , Lin Fu , Ban Feng , Hui Chen , Lize Xiong

{"title":"Adenosine-loaded adhesive microfluidic hydrogel microspheres stimulate acupoint activation for pain management","authors":"Xiujuan Li , Zehao Chen , Songgen Chen , Han Wang , Lin Fu , Ban Feng , Hui Chen , Lize Xiong","doi":"10.1016/j.matdes.2025.114708","DOIUrl":"10.1016/j.matdes.2025.114708","url":null,"abstract":"<div><div>Pain represents a significant public health challenge with substantial clinical and economic burdens. While pharmacotherapy remains a mainstay of pain management, its utility is limited by adverse side effects and the potential for dependency. Acupuncture has shown great potential in pain management through its ability to induce analgesic effects via acupoint stimulation. However, its poor specificity and ill-defined stimulation parameters compromise therapeutic specificity and reproducibility. Herein, we developed a biomaterial-based acupoint activation strategy for pain management. Adhesive polydopamine-coated hydrogel microspheres were fabricated using microfluidic techniques for accurate attachment and activation of acupoints. Adhesive hydrogel microspheres loaded with adenosine can slowly release exogenous adenosine at the ST36 acupoint to simulate the analgesic effect of acupuncture. <em>In vitro</em> and <em>in vivo</em> studies demonstrated that single-dose administration of adhesive microspheres can effectively target acupoints, elevate mechanical pain thresholds, and provide systemic anti-inflammatory effects for up to 7 days. Overall, the proposed adhesive hydrogel microsphere system offers a new perspective on acupuncture practice and pain management.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114708"},"PeriodicalIF":7.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Microstructured Y3Al5O12 single-crystal fibers for high-sensitivity quasi-distributed ultrasonic thermometry based on acoustic anisotropy engineering 基于声学各向异性工程的高灵敏度准分布超声测温微结构Y3Al5O12单晶光纤

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-16 DOI: 10.1016/j.matdes.2025.114751

Kaihui Zhang , Tao Wang , Mingji Zhang , Xin Guan , Zhengmin Wang , Wenchang Zhuang , Liang Zhang , Jian Zhang , Zhitai Jia

{"title":"Microstructured Y3Al5O12 single-crystal fibers for high-sensitivity quasi-distributed ultrasonic thermometry based on acoustic anisotropy engineering","authors":"Kaihui Zhang , Tao Wang , Mingji Zhang , Xin Guan , Zhengmin Wang , Wenchang Zhuang , Liang Zhang , Jian Zhang , Zhitai Jia","doi":"10.1016/j.matdes.2025.114751","DOIUrl":"10.1016/j.matdes.2025.114751","url":null,"abstract":"<div><div>The rapid development of aerospace, nuclear energy, and advanced manufacturing has created a growing demand for temperature sensing in extreme environments. Ultrasonic temperature sensors (UTS) are widely used in high-temperature sensing due to their extreme operating temperature close to the melting point of the waveguide materials. In this work, YAG single-crystal fibers (SCF) with spatially distributed acoustic reflection microstructures have been successfully fabricated via the laser-heated pedestal growth (LHPG) method and employed as acoustic waveguides. Herein, anisotropic acoustic waveguide behaviors were revealed in YAG SCF, where the [110]-oriented YAG SCF demonstrates enhanced unit sensitivity with the S-wave polarization direction of [<span><math><mrow><mn>1</mn><mover><mrow><mn>1</mn></mrow><mrow><mo>¯</mo></mrow></mover><mn>0</mn></mrow></math></span>], primarily attributed to the lower acoustic velocity and the more substantial velocity variations with temperature. Furthermore, quasi-distributed ultrasonic temperature sensing in the range of 30-1800℃ has been achieved based on the [110]-oriented YAG SCF with two discrete sensing units, reaching the maximum unit sensitivities of 47.18 ns·℃<sup>-1</sup>·m<sup>-</sup><sup>1</sup> and an optimal temperature resolution of 5.04℃ at 1800℃. Superior acoustic waveguide characteristics, a wide working temperature range, and the positive temperature-dependent sensor performance suggest that the [110]-oriented microstructured YAG SCF is an ideal candidate for distributed high-temperature sensing in harsh environments.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114751"},"PeriodicalIF":7.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Laser powder bed fusion of pure silver sputtering target: process, microstructure, and sputtering performance 激光粉末床熔镀纯银溅射靶：工艺、显微结构和溅射性能

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-16 DOI: 10.1016/j.matdes.2025.114779

Zheda Ning , Yipei He , Qi Tang , Yunxiu Chao , Yue Shen , Haozhang Zhong , Ming Wen , Jianfeng Gu

{"title":"Laser powder bed fusion of pure silver sputtering target: process, microstructure, and sputtering performance","authors":"Zheda Ning , Yipei He , Qi Tang , Yunxiu Chao , Yue Shen , Haozhang Zhong , Ming Wen , Jianfeng Gu","doi":"10.1016/j.matdes.2025.114779","DOIUrl":"10.1016/j.matdes.2025.114779","url":null,"abstract":"<div><div>Silver (Ag) sputtering targets are crucial in electronic information materials, particularly with the rapid advancement of Artificial Intelligence (AI), which has further increased their demand. However, the extremely high reflectivity and poor laser absorption of pure Ag in the infrared range make it challenging to process using conventional laser-based Additive Manufacturing (AM) systems, limiting its wide application. In this study, a novel hatch spacing-to-scanning speed ratio (<em>h</em>/<em>v</em>)-centered low-energy–density strategy was proposed to overcome this challenge and enable high-quality additive manufacturing of pure Ag. By optimizing the (<em>h</em>/<em>v</em>) value to 1.0E-04, we successfully fabricated dense, low-defect Ag sputtering targets without increasing energy input. The results demonstrated that this method significantly shortened the manufacturing cycle and produced high-performance Ag targets with refined grains (3–7 μm), high density (≥99.8 %), a smooth surface (Ra = 11.5 μm), and stable sputtering performance (sputtering rate = 31.8 nm/min). Furthermore, the hardness increased by 45.1 % compared to Ag targets prepared by traditional methods. This work offers a practical pathway for applying laser-based AM in the production of highly reflective metal sputtering targets, advancing their industrialization in thin-film electronics, while also contributing to the understanding of AM process–structure relationships in metallic materials.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114779"},"PeriodicalIF":7.9,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

In vitro antibacterial and In vivo osteogenesis of 3D-printed magnesium peroxide–doped calcium phosphate silicate scaffolds for revision total knee arthroplasty 3d打印过氧化镁掺杂磷酸硅酸钙支架翻修全膝关节置换术的体外抗菌和体内成骨作用

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114731

Lisha Meng , Hao Li , Xujia Hao , Tao Wu , Jingqiu Zhou , Yadong Chen , Qiang Zheng , Xiuhong Cao , Juan Wang , Xinwei Liu , Tongmeng Jiang , Tianxing Gong , Wei Yuan

{"title":"In vitro antibacterial and In vivo osteogenesis of 3D-printed magnesium peroxide–doped calcium phosphate silicate scaffolds for revision total knee arthroplasty","authors":"Lisha Meng , Hao Li , Xujia Hao , Tao Wu , Jingqiu Zhou , Yadong Chen , Qiang Zheng , Xiuhong Cao , Juan Wang , Xinwei Liu , Tongmeng Jiang , Tianxing Gong , Wei Yuan","doi":"10.1016/j.matdes.2025.114731","DOIUrl":"10.1016/j.matdes.2025.114731","url":null,"abstract":"<div><div>Revision total knee arthroplasty (RTKA) often encounters tibial bone defects and high infection risk, especially from methicillin-resistant <em>Staphylococcus aureus</em> (MRSA). Current strategies rely on bone grafts with antibiotics, but prolonged use promotes resistance. Here, we developed a 3D-printed magnesium peroxide (MgO<sub>2</sub>)–doped calcium phosphate silicate (CSP) scaffold to address both structural and antibacterial demands. The MgO<sub>2</sub>–CSP scaffold exhibited cancellous bone-like strength (∼7.95 MPa) and an interconnected macroporous structure conducive to cell migration and healing. <em>In vitro</em>, the 14 wt% MgO<sub>2</sub> scaffold (B14M) inhibited 80.4 % of Gram-negative bacteria and 74.6 % of MRSA via Mg<sup>2+</sup> and H<sub>2</sub>O<sub>2</sub> release, while both B0M (no MgO<sub>2</sub>) and B14M promoted BMSC proliferation and osteogenic differentiation. <em>In vivo</em>, the B14M scaffold markedly enhanced bone regeneration in rat tibial defects, achieving a BV/TV of ∼73.09 % versus ∼29.84 % for B0M at 8 weeks. These findings highlight MgO<sub>2</sub>–CSP scaffolds as a promising strategy to promote osteogenesis while combating MRSA-associated infections in RTKA.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114731"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Synergistic effect of interfacial silane film and laser texturing on joining characteristics of pretreated Al/CFRTP friction stir welded joints 界面硅烷膜和激光织构对Al/CFRTP搅拌摩擦焊接接头连接特性的协同作用

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114774

Suyu Wang , Wenquan Wang , Yuhua Chen , Xinge Zhang , Shanlin Wang , Timing Zhang , Yuxin Xu

{"title":"Synergistic effect of interfacial silane film and laser texturing on joining characteristics of pretreated Al/CFRTP friction stir welded joints","authors":"Suyu Wang , Wenquan Wang , Yuhua Chen , Xinge Zhang , Shanlin Wang , Timing Zhang , Yuxin Xu","doi":"10.1016/j.matdes.2025.114774","DOIUrl":"10.1016/j.matdes.2025.114774","url":null,"abstract":"<div><div>Driven by lightweight requirements in the low-altitude economy, a synergistic laser ablation‒silane coupling process was developed to optimize friction stir welded joints between Al alloys and carbon fiber-reinforced thermoplastics (CFRTPs), with a focus on elucidating the sequence-dependent gradient interfacial joining mechanism. A sequence involving silane coupling prior to laser ablation was employed, enabling dual-mode enhancement of the interfacial geometric configuration and chemical bonding. Mechanical interlocking was ensured in laser-ablated zones, whereas the chemical bonding capacity in unablated regions was enhanced. The tensile–shear strength and cross-tension strength of the joints were measured at 32.6 MPa and 3.2 MPa, respectively. Detailed microstructural characterization revealed that mechanical interlocking occurred in the laser-ablated zones of the PA66 resin and that synergistic physicochemical reinforcement was achieved via covalent Al‒O‒Si bonds coupled with molecular chain entanglement/hydrogen bonding in unablated regions. Defect-free continuous interfacial transitions were confirmed through the penetration of nanolamellar structures by amorphous silane films. This synergistic strategy provides new insights for the high-performance joining of dissimilar metal and polymer materials.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114774"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Recent progress of manipulating microenvironment for spinal cord injury therapy using nanoparticles 纳米颗粒操纵微环境治疗脊髓损伤的研究进展

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114769

Linfeng Xiao, Chunping Tian, Yinshan Hong, Jiajun Wu, Jiani Du, Yanling Yang, Xiaowei Chang

{"title":"Recent progress of manipulating microenvironment for spinal cord injury therapy using nanoparticles","authors":"Linfeng Xiao, Chunping Tian, Yinshan Hong, Jiajun Wu, Jiani Du, Yanling Yang, Xiaowei Chang","doi":"10.1016/j.matdes.2025.114769","DOIUrl":"10.1016/j.matdes.2025.114769","url":null,"abstract":"<div><div>Spinal cord injury (SCI) is a severe traumatic condition that profoundly compromises patients’ health and quality of life. While various therapeutic strategies, including pharmacotherapy, have been developed and demonstrate some efficacy, however their clinical application is significantly limited by challenges, such as low drug bioavailability and undesirable side effects. Moreover, a critical limitation is their frequently neglect the SCI microenvironment, which serves as the essential foundation for nerve regeneration. In contrast, intelligent nanoparticles-based delivery systems, owing to their excellent biocompatibility and high drug-loading capacity, they can modulate the SCI microenvironment on demand, hold great promise for improving SCI therapy. However, how to design intelligent nanoparticles to achieve precise microenvironment regulation for SCI therapy is still lack of a systematic summary. Therefore, this review summarizes recent advances in advances in modulating the microenvironment for treating SCI using targeted nano drug delivery system, hope provide a theoretical basis for the further development of nano-drug to treatment of SCI.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114769"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Sustainable biopolymer design: extraction of chitin and chitosan using natural deep eutectic solvents with improved antibacterial features 可持续生物聚合物设计：利用天然深层共晶溶剂提取甲壳素和壳聚糖，具有更好的抗菌功能

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114775

Issam Thamer , Magdalena Mazurek-Budzyńska , Vignesh Kumaravel

{"title":"Sustainable biopolymer design: extraction of chitin and chitosan using natural deep eutectic solvents with improved antibacterial features","authors":"Issam Thamer , Magdalena Mazurek-Budzyńska , Vignesh Kumaravel","doi":"10.1016/j.matdes.2025.114775","DOIUrl":"10.1016/j.matdes.2025.114775","url":null,"abstract":"<div><div>The extraction of biopolymers using natural deep eutectic solvents (NADES) offers a promising approach for developing sustainable and biocompatible materials for biomedical applications. In this study, a novel and environmentally friendly process has been developed for extracting chitin and chitosan from organic Agaricus bisporus (<em>A. bisporus</em>) mushrooms, which serves as a readily available and renewable resource. NADES not only enhances the extraction efficiency but also preserves the structural integrity of the biopolymers. The characteristics of these biopolymers were analyzed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric (DTG/TGA) analysis, scanning electron microscopy (SEM), atomic force microscopy (AFM), and nuclear magnetic resonance (<sup>1</sup>H NMR) techniques. By optimizing the NADES extraction conditions, high-purity chitin (98.58 %) and chitosan (98.69 %) were achieved, surpassing the purity levels achieved by traditional chemical methods. NADES-extracted chitosan exhibited a remarkable degree of deacetylation (DD) of up to 94.22 %, and a crystallinity index (CrI) of up to 61.77 %, highlighting its enhanced functionality for biomedical applications. Moreover, the NADES-derived biopolymers showed excellent biocompatibility with <em>L929</em> fibroblast cells. They exhibited dose-dependent antibacterial activity against <em>Staphylococcus aureus (S. aureus)</em> and <em>Escherichia coli (E. coli)</em> and exhibited promising antioxidant and biodegradability properties.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114775"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Overcoming the challenges of fusion-based brass additive manufacturing through solid-state additive friction-stir deposition 通过固态添加剂搅拌摩擦沉积技术克服熔合黄铜增材制造的挑战

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114756

Meet Gor , Matthew Barnett , Pinaki Bhattacharjee , Daniel Fabijanic

{"title":"Overcoming the challenges of fusion-based brass additive manufacturing through solid-state additive friction-stir deposition","authors":"Meet Gor , Matthew Barnett , Pinaki Bhattacharjee , Daniel Fabijanic","doi":"10.1016/j.matdes.2025.114756","DOIUrl":"10.1016/j.matdes.2025.114756","url":null,"abstract":"<div><div>Processing Cu-Zn alloys (brass) using fusion-based additive manufacturing (AM) techniques presents significant challenges due to volatile elements and the inherently high thermal conductivity of these alloys. Addressing these issues often demands increased energy input, modifications to laser systems, and compositional adjustments to mitigate zinc loss. However, such solutions are complex and remain in the early stages of development. In contrast, Additive friction stir deposition (AFSD), a solid-state AM technique, offers a promising alternative to overcome these limitations. This study represents a pioneering effort to deposit dual-phase brass (Cu-40Zn) using a closed-loop temperature-controlled AFSD. The influence of processing temperature (ranging from 0.38 to 0.61 T<sub>p</sub>/T<sub>m</sub>) on microstructural evolution and mechanical performance was systematically investigated along the build and longitudinal direction. The resulting microstructure was predominantly governed by dynamic recrystallization and post-dynamic recrystallization (P-DRX) due to repeated thermal cycles. The as-deposited brass exhibited a balanced strength-ductility combination, with yield strength ranging from 215 to 437 MPa and elongation from 34 % to 67 %. Tensile properties in longitudinal and build directions revealed that grain boundary strengthening was the primary mechanism for improving the mechanical performance. The as-deposited properties were comparable to those of wrought counterparts, thus highlighting the potential of AFSD for fabricating high-performance brass components.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114756"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Improving the performance of organic photodetectors by low-temperature electron beam annealing 低温电子束退火提高有机光电探测器的性能

IF 7.9 2区材料科学

Materials & Design Pub Date : 2025-09-15 DOI: 10.1016/j.matdes.2025.114778

Jaebum Jeong , Gun woong Kim , Eun Jin Park , Seong Woo Jeong , Seok Hwan Jang , Jae Yeong Jeong , Soo Won Heo , Jun Young Kim

{"title":"Improving the performance of organic photodetectors by low-temperature electron beam annealing","authors":"Jaebum Jeong , Gun woong Kim , Eun Jin Park , Seong Woo Jeong , Seok Hwan Jang , Jae Yeong Jeong , Soo Won Heo , Jun Young Kim","doi":"10.1016/j.matdes.2025.114778","DOIUrl":"10.1016/j.matdes.2025.114778","url":null,"abstract":"<div><div>Organic photodetectors (OPDs) are promising candidates for next-generation optoelectronic devices due to their flexibility, low cost, and scalability. Enhancing OPD performance requires optimizing key layers such as the electron transport layer (ETL) using low-temperature processes to prevent thermal degradation. This study explores the use of low-temperature electron beam annealing (EBA) to improve the performance of Al-doped ZnO (AZO)-based ETLs. The impact of EBA irradiation time (1–8 min) on the structural, morphological, and electrical properties of AZO films was systematically analyzed. EBA effectively modulated oxygen vacancies and reduced surface roughness, lowering trap density and leakage current while enhancing charge transport. An OPD with an ETL treated by 8 min of EBA exhibited superior detectivity (2.22 × 10<sup>13</sup> Jones at 0 V) and significantly reduced leakage current compared to a device with conventionally annealed ETLs. Importantly, the low-temperature EBA process preserved the amorphous state of AZO, making it suitable for heat-sensitive and flexible substrates. These findings demonstrate that EBA is a powerful, scalable method for ETL optimization in OPDs and offers a pathway toward high-performance, energy-efficient, and flexible optoelectronic devices.</div></div>","PeriodicalId":383,"journal":{"name":"Materials & Design","volume":"259 ","pages":"Article 114778"},"PeriodicalIF":7.9,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145108181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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