Advanced Functional Materials最新文献_第4页

Reconfigurable High‐Performance Memristors Based on Few‐Layer High‐κ Dielectric Bi2SeO5 for Neuromorphic Computing 基于少层高κ介电Bi2SeO5的可重构高性能忆阻器用于神经形态计算

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202514338

Fang Yang, Yuwei Xiong, Zhaofu Chen, Shizheng Wang, Yinan Wang, Zhihao Qu, Weiwei Zhao, Jiayi Li, Kuibo Yin, Zhenhua Ni, Jing Wu, Diing shenp Ang, Dongzhi Chi, Xin Ju, Junpeng Lu, Hongwei Liu

{"title":"Reconfigurable High‐Performance Memristors Based on Few‐Layer High‐κ Dielectric Bi2SeO5 for Neuromorphic Computing","authors":"Fang Yang, Yuwei Xiong, Zhaofu Chen, Shizheng Wang, Yinan Wang, Zhihao Qu, Weiwei Zhao, Jiayi Li, Kuibo Yin, Zhenhua Ni, Jing Wu, Diing shenp Ang, Dongzhi Chi, Xin Ju, Junpeng Lu, Hongwei Liu","doi":"10.1002/adfm.202514338","DOIUrl":"https://doi.org/10.1002/adfm.202514338","url":null,"abstract":"Memristors are pivotal for energy‐efficient artificial intelligence (AI) hardware, potentially eliminating the von Neumann bottleneck by in‐memory realizations of synaptic operations. However, the dynamic requirements of neuromorphic computing on specific electronic devices pose reliability and universality challenges, limiting progress toward more widely applicable computing platforms. Here, a 2D high‐κ dielectric‐based memristor with the desired reconfigurable resistive switching behavior is successfully demonstrated. Utilizing a few layered Bi2SeO5 possessing excellent electrical insulation properties as the switching medium, the device features a low operating voltage (≈0.5 V), low operation current (10 pA), long memory retention (>103 s), large switching window (≈108), steep slope (<1 mV dec−1), fast switching speed (40 ns), and low energy dissipation (≈1 pJ). The switching characteristics between volatile and non‐volatile memory can be achieved on demand by regulating compliance currents, offering the possibility of implementing multiple neural computational primitives. A simulated convolutional neural network (CNN) based on long‐term potentiation/depression (LTP/D) achieves 85% accuracy in complex image recognition. Furthermore, MNIST and fashion‐MNIST recognition with built reservoir computing (RC) utilizing volatile behaviors reach 97% and 85% accuracy, respectively. This work opens new opportunities for 2D high‐κ dielectrics in next‐generation AI hardware with enhanced energy efficiency and computational versatility.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"108 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Self‐Healing Ionogel with Unprecedented High Gel‐Sol Transition Temperature Enables Self‐Healing Zinc‐Air Battery Operation at 100 °C 具有前所未有的高凝胶-溶胶转变温度的自修复离子凝胶使锌-空气电池在100°C下运行

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202513459

Hongli Li, Fuchang Xu, Xinru Lin, Yang Li

{"title":"Self‐Healing Ionogel with Unprecedented High Gel‐Sol Transition Temperature Enables Self‐Healing Zinc‐Air Battery Operation at 100 °C","authors":"Hongli Li, Fuchang Xu, Xinru Lin, Yang Li","doi":"10.1002/adfm.202513459","DOIUrl":"https://doi.org/10.1002/adfm.202513459","url":null,"abstract":"Existing zinc‐air batteries (ZABs) suffer from limited cycle lives and instability at temperatures exceeding 60 °C, severely hindering their high‐temperature application. Herein, a self‐healing ionogel with an exceptionally high gel‐sol transition temperature (Tgel‐sol) is prepared, enabling stable ZAB operation at 100 °C. This ionogel, termed UGTS, is synthesized by copolymerizing 2‐(2‐benzoylhydrazine‐1‐carboxamido)ethyl acrylate with poly(ethylene glycol) monomethyl ether acrylate and incorporating Zn(BF4)2/1‐ethyl‐3‐methylimidazolium tetrafluoroborate electrolyte. The UGTS ionogel exhibits non‐volatility, a Tgel‐sol of 187 °C, high decomposition voltages at elevated temperatures, and the ability to suppress zinc dendrite growth and by‐product formation under high‐temperature conditions. Moreover, this ionogel exhibits a rapid, efficient, and repeatable room‐temperature self‐healing capability. These attributes are ascribed to its multiple‐hydrogen‐bond‐induced phase‐separated structure, which provides excellent high‐temperature thermal stability and dynamics. At 100 °C, the UGTS ionogel‐based ZAB achieves a 76 h cycle life and can reliably power a digital watch for over 6 days, a performance unattainable by previous ZABs. Moreover, after being severed, the electrochemical performance of this battery is fully restored within 3 s at room temperature. This work provides a novel strategy for developing high‐performance self‐healing ZABs for extreme temperature applications, addressing the critical challenges of thermal stability and self‐healing in next‐generation energy storage devices.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"14 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Gel‐Level Conversion: Customizing Silver‐Based Aerogels for Enhanced Electrocatalysis 凝胶级转化：定制银基气凝胶用于增强电催化

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202514345

Beibei Weng, Xiaoyue Sun, De‐Yi Zhang, Ning Wang, René Hübner, Jiaxuan Hu, Jingwen Zhao, Shuna Hao, Qian Cui, Huan Wang, Ran Du

{"title":"Gel‐Level Conversion: Customizing Silver‐Based Aerogels for Enhanced Electrocatalysis","authors":"Beibei Weng, Xiaoyue Sun, De‐Yi Zhang, Ning Wang, René Hübner, Jiaxuan Hu, Jingwen Zhao, Shuna Hao, Qian Cui, Huan Wang, Ran Du","doi":"10.1002/adfm.202514345","DOIUrl":"https://doi.org/10.1002/adfm.202514345","url":null,"abstract":"As a well‐known coin metal, silver (Ag) stands out for its unique plasmonic properties and the lowest cost among all noble metals. However, the sol–gel chemistry of the Ag system remains undeciphered, challenging the rational design of Ag aerogels. Additionally, the chemical reactivity of Ag is often neglected in designing noble metal aerogels (NMAs), leaving significant potential untapped for advanced applications. Here, versatile engineering of Ag aerogels is realized by precisely tuning metal‐ion, metal‐ligand, and metal‐metal interactions, achieving a ligament size modulation across 3 orders of magnitude and downsizing the ligament size to <10 nm. The redox potential difference (ΔE)‐driven gel‐level conversion methodology is further established by utilizing the chemical activity of Ag and the self‐healing properties of noble metal hydrogels, stepwise yielding various self‐standing and hollow‐structured Ag‐M aerogels with record‐high performance for (photo)electrocatalysis. This study not only offers guidelines for manipulating multiscale structures of broad metal aerogels but also unveils their unprecedented potential for energy‐related applications.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"208 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Multiple Hydrogen Bonded 3D‐Printed Elastomers with Enhanced Toughening by Photothermal Dual Curing for Customizable Biomimetic Flexible Grippers 多种氢键3D打印弹性体，光热双固化增强增韧，可定制仿生柔性夹具

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202510489

Tongyi Wu, Qiaoling Zhang, Zhiwei Zhang, Taojun Lin, Zhongbiao Xie, Yiquan Zang, Xingyan Zheng, Long Chen, Haisheng Hu, Qiu Chen, Guoqiao Lai

{"title":"Multiple Hydrogen Bonded 3D‐Printed Elastomers with Enhanced Toughening by Photothermal Dual Curing for Customizable Biomimetic Flexible Grippers","authors":"Tongyi Wu, Qiaoling Zhang, Zhiwei Zhang, Taojun Lin, Zhongbiao Xie, Yiquan Zang, Xingyan Zheng, Long Chen, Haisheng Hu, Qiu Chen, Guoqiao Lai","doi":"10.1002/adfm.202510489","DOIUrl":"https://doi.org/10.1002/adfm.202510489","url":null,"abstract":"This study develops low‐viscosity, two‐component polycaprolactone (PCL)‐based 3D‐printed elastomers via photothermal dual curing. To prevent a sudden increase in viscosity from the direct introduction of hydrogen bonding in the oligomer, multiple hydrogen bonding components are innovatively added into the resin system in the form of the chain extender 12NH. The samples undergo thermal treatment after light curing. Incorporating 12NH, which retains unreacted isocyanate functionality, into the elastomer's macromolecular long‐chain forms an interpenetrating network of multiple hydrogen bonds, dynamic covalent bonds, and a micro‐phase separation. The resultant elastomers exhibit superior mechanical properties, achieving a tensile strength of 43.5 MPa and tensile toughness of 213.1 MJ m−3, while maintaining high biocompatibility. These properties surpass those of existing PCL‐based reduced photopolymerized 3D‐printed elastomers. Subsequently, complex lattice structures and bionic flexible grippers are successfully printed, validating their potential in applications requiring efficient gripping and rapid response. This study offers novel concepts for designing 3D‐printed elastomers that optimize the balance between high strength and toughness, precision molding, and biosafety, facilitating the development of tailored manufacturing for flexible robotics and implantable medical devices.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"6 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Symmetrical Molecular Topology Enables Ultrathin Solid Polymer Electrolytes for Stable Lithium‐Metal Batteries 对称分子拓扑使超薄固体聚合物电解质用于稳定的锂金属电池

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202513143

Kai Chen, Anjun Hu, Wei Yang, Yuanjian Li, Zhi Wei Seh, Fei Li, Jianping Long, Shimou Chen

{"title":"Symmetrical Molecular Topology Enables Ultrathin Solid Polymer Electrolytes for Stable Lithium‐Metal Batteries","authors":"Kai Chen, Anjun Hu, Wei Yang, Yuanjian Li, Zhi Wei Seh, Fei Li, Jianping Long, Shimou Chen","doi":"10.1002/adfm.202513143","DOIUrl":"https://doi.org/10.1002/adfm.202513143","url":null,"abstract":"Solid polymer electrolytes (SPEs) have emerged as promising candidates for lithium‐metal batteries owing to their advantages in safety, flexibility, and processability. However, ultrathin SPEs (<10 µm) still face challenges in practical applications, including structural inhomogeneity, sluggish ion transport, and lithium dendrite penetration. This study breaks through the conventional paradigm of compositional modulation and proposes a symmetrical molecular topology design strategy based on 2,2‐Bis(4‐allyloxy‐3,5‐dibromophenyl)propane (BADBP) polymerization network. The diallyloxy symmetric structure of BADBP bridges and constructs a 3D crosslinked network, effectively repairing the pore defects in the poly(vinylidene fluoride‐co‐hexafluoropropylene) matrix, achieving an ultrathin thickness of 6 µm with high mechanical robustness and uniform ion channels. The bromophenyl groups in BADBP reduce the crystallinity of the matrix via steric hindrance effects, while the high bond energy of C─Br bonds endows the electrolyte with exceptional thermal stability. Moreover, bromine atoms electrostatically anchor TFSI⁻ anions, promoting lithium salt dissociation and forming a LiF/LiBr‐rich interphase layer. As a result, the modified Li||LiNi0.8Co0.1Mn0.1O2 cells demonstrate stable cycling at both room temperature and 60 °C, along with 5C fast‐charging capability. The pouch cell further passes nail penetration and high‐temperature safety tests. This work establishes a design paradigm for designing high‐performance ultrathin SPEs in lithium‐metal batteries.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"11 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 Situ Exsolution to Form Cu Nanoparticles on Cu–Doped LaFeO3 Perovskite Oxides for Efficient Electrocatalytic Reduction of Nitrate to Ammonia 在Cu掺杂的LaFeO3钙钛矿氧化物上原位析出形成Cu纳米颗粒，用于硝酸盐高效电催化还原成氨

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-21 DOI: 10.1002/adfm.202513364

Mingqing Zuo, Yuxuan Kong, Han Zhou, Yaping Chen, Yanyan Sun, Shuang Li, Lei Han

{"title":"In Situ Exsolution to Form Cu Nanoparticles on Cu–Doped LaFeO3 Perovskite Oxides for Efficient Electrocatalytic Reduction of Nitrate to Ammonia","authors":"Mingqing Zuo, Yuxuan Kong, Han Zhou, Yaping Chen, Yanyan Sun, Shuang Li, Lei Han","doi":"10.1002/adfm.202513364","DOIUrl":"https://doi.org/10.1002/adfm.202513364","url":null,"abstract":"Perovskite oxides hold significant potentials for catalytic applications due to their unique electronic structure and favorable chemical properties, whereas their intrinsic catalytic activity toward the electrocatalytic nitrate reduction reaction (NITRR) for NH3 production remains very limited yet needs to be further improved. Herein, a dual–engineering approach is proposed, combining Cu–mediated cation substitution and in situ exsolution for the construction of Cu nanoparticles on Cu–doped LaFeO3 perovskites (LFC–E) to address these limitations. The optimal LF3C7–E exhibits the highest NITRR performance with an NH3 yield rate of 4.1 mg h−1 mgcat−1 and Faradaic efficiency of 76% at −0.7 V, which is superior to the corresponding LFC–P without exsolution treatment. The in situ Fourier transform infrared spectroscopy in combination with density functional theory calculations reveals that the synergistic effect between LaFeO3 and Cu enables the efficiently decreased energy barrier for the hydrogenation step of *NO (*NO + H+ + e− → *NOH + H2O), which is considered as the rate–determining step during the NITRR process. Moreover, an aqueous Zn–NO3− battery and Zn–NO2− battery with the optimal LF3C7–E as the cathode is assembled and achieves simultaneously electricity supply and NH3 production.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"118 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

An In Situ Transformable Orally Administrated System for Targeted Intestinal Barrier Protection and Inflammatory Microenvironment Modulation in Sepsis Therapy 在脓毒症治疗中用于靶向肠道屏障保护和炎症微环境调节的原位可转化口服系统

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-16 DOI: 10.1002/adfm.202507043

Boyi Liao, Lei Li, Wenqi Liang, Huimin Lin, Ben Hu, Kexin Wang, Renli Huang, Peiqi Wang, Qining Weng, Yuanchen He, Yue Cao, Meng Yu, Zhaowei Zou

{"title":"An In Situ Transformable Orally Administrated System for Targeted Intestinal Barrier Protection and Inflammatory Microenvironment Modulation in Sepsis Therapy","authors":"Boyi Liao, Lei Li, Wenqi Liang, Huimin Lin, Ben Hu, Kexin Wang, Renli Huang, Peiqi Wang, Qining Weng, Yuanchen He, Yue Cao, Meng Yu, Zhaowei Zou","doi":"10.1002/adfm.202507043","DOIUrl":"https://doi.org/10.1002/adfm.202507043","url":null,"abstract":"Sepsis is a life-threatening condition characterized by organ dysfunction caused by a dysregulated host response to infection. An inflammatory intestinal environment, disruption of the intestinal epithelial barrier, impairment of the mucus layer, and dysregulation of the gut microbiome can lead to pathogen translocation and increased susceptibility to sepsis. Hence, an orally administered nanomedicine is developed, S-Z@M nanoparticles (NPs), based on food-derived mussel adhesive protein (M)-modified zeolitic imidazolate framework-8 (Z) for the targeted delivery of anti-inflammatory herbal medicine. S-Z@M NPs exert multi-therapeutic effects by forming a physical barrier at injured intestinal sites and persistently activating anti-inflammatory pathways. First, S-Z@M NPs scavenge reactive oxygen species (ROS) to reduce oxidative stress injury. After ROS-triggered charge transition and oxidative cross-linking, the M layer adheres to the negatively charged damaged mucosa to form a physical barrier, preventing further damage from microorganisms and toxins. Sinomenine (S) releases from Z NPs in response to an acidic environment suppresses pro-inflammatory pathways, thereby inhibiting intestinal epithelial cell apoptosis and restoring intestinal tight junctions and gut microbiota homeostasis. Overall, S-Z@M NPs show a strong potential to regulate the inflammatory microenvironment and restore intestinal barrier function, opening the door for further exploitation in sepsis therapy.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"675 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144669915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Long‐Life Anode‐Free Lithium Metal Battery Enabled by Synergistic Electrodes Design 采用协同电极设计的长寿命无阳极锂金属电池

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-15 DOI: 10.1002/adfm.202510253

Fangding Huang, Xinjian Li, Yu Lin, Xueyang Wang, Wenchang Zhu, Xinghua Chen, Leyu Ding, Xinyu Zhang, Xiaotian Zhu, Chengyuan Peng, Ying He, Chang Lu, Jianqing Zhao, Zhao Deng

{"title":"Long‐Life Anode‐Free Lithium Metal Battery Enabled by Synergistic Electrodes Design","authors":"Fangding Huang, Xinjian Li, Yu Lin, Xueyang Wang, Wenchang Zhu, Xinghua Chen, Leyu Ding, Xinyu Zhang, Xiaotian Zhu, Chengyuan Peng, Ying He, Chang Lu, Jianqing Zhao, Zhao Deng","doi":"10.1002/adfm.202510253","DOIUrl":"https://doi.org/10.1002/adfm.202510253","url":null,"abstract":"Anode‐free lithium metal batteries (AFLMBs) have been emerging for energy‐dense practical applications, but they encounter a major issue of cycling instability due to the poor lithium plating/stripping reversibility on the copper (Cu) current collector during electrochemical cycling. A synergistic electrodes design is reported to ameliorate long‐term cycling performance for AFLMBs. In the cathode, the Li‐rich Li22Sn5‐Li2O‐LiF (LSOF) shell is fabricated on core LiFePO4 (LFP) particles to provide excessive active lithium ion (Li+) during the initial charging as the lithium compensator. Concurrently in the anode, the Cu foil is coated with a conformal and uniform Al2O3 layer through atomic layer deposition (ALD) to obtain the composite current collector. The enhanced lithiophilic property of Cu@ALD‐Al2O3 is conclusively proved by electrochemical measurements, in situ optical microscopy, and theoretical simulations, resulting in improved reversibility and kinetics of the lithium plating/stripping on its surface. The LFP@LSOF||Cu@ALD‐Al2O3 pouch cell with a capacity of 26 mAh achieves a desirable 79.3% capacity retention after 200 cycles, demonstrating significantly enhanced cycling stability for AFLMBs. This work provides a breakthrough solution for lengthening the cycle life of anode‐free lithium metal batteries for their promising practical deployment.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"94 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144639940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Biodegradable Fe‐Zn Alloy Microtubes with Good Mechanical Properties, Degradability, and Cytocompatibility Prepared by Electrodeposition 电沉积法制备具有良好机械性能、可降解性和细胞相容性的可生物降解铁锌合金微管

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-15 DOI: 10.1002/adfm.202504797

Shuaikang Yang, Fengyun Yu, Weiqiang Wang, Yu Gao, Zihan Zhang, Jiawen Wang, Peiwen Miao, Shengzhi Hao

{"title":"Biodegradable Fe‐Zn Alloy Microtubes with Good Mechanical Properties, Degradability, and Cytocompatibility Prepared by Electrodeposition","authors":"Shuaikang Yang, Fengyun Yu, Weiqiang Wang, Yu Gao, Zihan Zhang, Jiawen Wang, Peiwen Miao, Shengzhi Hao","doi":"10.1002/adfm.202504797","DOIUrl":"https://doi.org/10.1002/adfm.202504797","url":null,"abstract":"Biodegradable iron‐based alloys show significant potential for use in degradable vascular stents due to their excellent mechanical properties and good biocompatibility. However, their application is limited by slow corrosion degradation rates. In this study, iron‐based microtubes alloyed with Zn are fabricated through cathode‐rotated electrodeposition, resulting in accelerated degradation rates. The microstructure, mechanical properties, corrosion behavior, and cytocompatibility of the Fe‐Zn alloy microtubes are systematically investigated. Results show that the Fe‐Zn alloy microtubes have submicron‐sized equiaxed grains and micron‐sized columnar grains. These alloys exhibit excellent mechanical properties, the ultimate tensile strengths of Fe‐2.8Zn and Fe‐5.0Zn alloys are 493 and 525 MPa, respectively, with elongations of 12.2% and 9.8%. Zn is incorporated into the α‐Fe matrix as a solid solution, enhancing electrochemical activity. After 28 days of immersion in simulated body fluid (SBF), Fe‐Zn alloys with up to 5 wt.% Zn exhibit a relatively uniform degradation pattern with corrosion rates exceeding 0.150 mm y−1. Electrochemical tests and immersion experiments reveal the corrosion product formation process and mechanisms. In vitro tests confirm no adverse effects on endothelial cell viability. Analysis shows that Fe‐Zn alloy microtubes, with regulated corrosion behavior and good mechanical properties, are promising candidates for biodegradable vascular stents.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"36 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144630381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Peak‐in‐Valley Metal Nano‐Architectures via E‐Beam‐Guided Metal Oxide Redox 通过电子束引导金属氧化物氧化还原的峰谷金属纳米结构

IF 19 1区材料科学

Advanced Functional Materials Pub Date : 2025-07-14 DOI: 10.1002/adfm.202514610

Auwais Ahmed, Andrei G. Fedorov

{"title":"Peak‐in‐Valley Metal Nano‐Architectures via E‐Beam‐Guided Metal Oxide Redox","authors":"Auwais Ahmed, Andrei G. Fedorov","doi":"10.1002/adfm.202514610","DOIUrl":"https://doi.org/10.1002/adfm.202514610","url":null,"abstract":"Focused electron beams enable nanoscale material modification via localized etching or deposition. In liquid‐phase electron‐beam‐mediated processing, radiolysis‐driven redox reactions present an opportunity to control both etching and deposition simultaneously. Here, this duality using a water‐ammonia solvent as a tunable redox mediator on copper surfaces is demonstrated. At lower ammonia concentrations, the oxidation process dominates, etching copper to sub‐50‐nm depths. The copper ions and ion‐complexes released during this initial oxidation step are reduced by solvated electrons resulting in metal deposition into the etched sites, over longer e‐beam exposures, producing characteristic peak‐in‐valley nanostructures. Conversely, at higher ammonia concentrations copper‐ammine ion complexation and radiolytic oxidizing species scavenging by ammonia occur at higher rates, creating a reducing environment conducive to rapid beam‐guided copper deposition. Reaction‐transport simulations and experiments are performed to show the effects of ammonia‐mediated radiolysis chemistry, describing the direct influence of solvent concentration on redox balance and the outcome of e‐beam guided processing. By uniting both etching and deposition within a single framework, this work provides a versatile route for controlled surface nanostructuring.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"19 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144622267","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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