Advanced Functional Materials最新文献

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Second Near-Infrared Window Fluorescence Materials for In Vivo Dynamic Multiplexed Imaging
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202422693
Fang Fan, Keyun Zeng, Yingying Zhu, Yuxin Zhang, Yu Chen, Diya Lv, Dan Jia, Yifeng Chai, Xiaofei Chen, Quan Li
{"title":"Second Near-Infrared Window Fluorescence Materials for In Vivo Dynamic Multiplexed Imaging","authors":"Fang Fan, Keyun Zeng, Yingying Zhu, Yuxin Zhang, Yu Chen, Diya Lv, Dan Jia, Yifeng Chai, Xiaofei Chen, Quan Li","doi":"10.1002/adfm.202422693","DOIUrl":"https://doi.org/10.1002/adfm.202422693","url":null,"abstract":"Second near-infrared (NIR-II) fluorescence imaging has emerged as a breakthrough technology for accurately revealing complex mechanisms in vivo owing to its high sensitivity, deeper tissue penetration, high spatiotemporal resolution, and high throughput. This review provides a comprehensive overview of NIR-II fluorescence imaging, specifically focusing on the materials used, including single-walled carbon nanotubes (SWCNTs), quantum dots (QDs), rare-earth nanoparticles (RENPs), and organic fluorophores (OFs). It details their development, application, and advantageous performance in NIR-II fluorescence imaging. Furthermore, this review highlights an approach to dynamic multiplexed NIR-II fluorescence imaging in vivo that enables multitarget detection, providing a powerful tool for accurately and effectively assessing pathological processes and revealing complex biological mechanisms in vivo. Finally, it explores the aspects of translational medicine for NIR-II imaging, addressing challenges, and future prospects related to material development, detection equipment, and unmet biomedical applications.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"75 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745513","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
A Visible Light-Responsive Hydrogel to Study the Effect of Dynamic Tissue Stiffness on Cellular Mechanosensing
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202501585
Aafreen Ansari, Sanchyan Bhowmik, Kaiwen Zhang, Chayla L. Reeves, Danielle Vahala, Yu Suk Choi, Amy Gelmi, Alexander N. Combes, Rocky S. Tuan, Vinh X. Truong, John S. Forsythe, Jessica E. Frith
{"title":"A Visible Light-Responsive Hydrogel to Study the Effect of Dynamic Tissue Stiffness on Cellular Mechanosensing","authors":"Aafreen Ansari, Sanchyan Bhowmik, Kaiwen Zhang, Chayla L. Reeves, Danielle Vahala, Yu Suk Choi, Amy Gelmi, Alexander N. Combes, Rocky S. Tuan, Vinh X. Truong, John S. Forsythe, Jessica E. Frith","doi":"10.1002/adfm.202501585","DOIUrl":"https://doi.org/10.1002/adfm.202501585","url":null,"abstract":"Dynamic changes in elasticity during tissue development, remodeling, and aging influence cell behavior through mechanotransduction, yet most studies rely on hydrogels with fixed mechanical properties. Although photoresponsive azobenzene-based hydrogels can control substrate stiffness dynamically, they require UV light, which can damage cells and DNA. This makes it difficult to determine whether cellular responses are due to mechanical changes or UV-induced damage. This study develops a polyacrylamide-azobenzene hydrogel system (PAMA) responsive to biocompatible blue and green light, enabling unambiguous investigation of cellular mechanosensing dynamics. The hydrogel system achieves rapid and reversible switching between physiologically relevant stiffness values (19 to 4 kPa), triggering immediate responses in mesenchymal stromal cells (MSCs) including changes in cell shape and yes-associated protein (YAP) localization. When exposed to fluctuating substrate stiffness, early-passage MSCs demonstrate rapid adaptive responses through cell spreading, while late-passage MSCs exhibit delayed spreading and pronounced nuclear lamina wrinkling, indicating impaired mechanosensitivity. These findings provide new insights into cellular mechanosensing dynamics, particularly with respect to cellular aging. With the ability to simulate tissue development, homeostasis, aging, and pathological conditions such as fibrosis or tumorigenesis, this platform also offers exciting potential across multiple fields, from regenerative medicine to cancer research.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"38 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745516","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
Expediting Sodium Energy of Hard Carbon by Cation/Anion Co-Interfering Chemistry
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202505468
Zhidong Hou, Yiming Zhao, Yichen Du, Fengxuan Wu, Weijia He, Fei Xu, Jian-Gan Wang
{"title":"Expediting Sodium Energy of Hard Carbon by Cation/Anion Co-Interfering Chemistry","authors":"Zhidong Hou, Yiming Zhao, Yichen Du, Fengxuan Wu, Weijia He, Fei Xu, Jian-Gan Wang","doi":"10.1002/adfm.202505468","DOIUrl":"https://doi.org/10.1002/adfm.202505468","url":null,"abstract":"Hard carbon promises commercial prospect as the anode materials of Na-ion batteries, however, it remains a huge challenge to refine the carbon microstructure for advanced sodium energy. Herein, a powerful design strategy of cation/anion co-interfering chemistry is demonstrated to expedite the sodium storage capability of resin-based hard carbon. A desirable carbon microstructure rich in closed pores and pseudographitic crystallites is synergetically developed by cation-triggered activation and anion-induced curvature of graphene nanosheets, which creates abundant active sites and fast Na<sup>+</sup> diffusion channels. Impressively, the as-optimized hard carbon presents an enhanced reversible capacity of 349.3 mAh g<sup>−1</sup>, outstanding rate capability of 221.6 mAh g<sup>−1</sup> at 2 A g<sup>−1</sup>, as well as superior lifetime over 5000 cycles. The pore-induced kinetic characteristics and charge storage mechanism are systematically unveiled by theoretical calculations and in situ techniques. This work confers a fresh design methodology for rationally regulating the carbon microstructure for high-capacity and superb-rate sodium storage.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"133 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745517","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
Robust Injectable Hydrogels for Hemophilic Arthropathy via Anti-Inflammation, Iron Removal and Cartilage Protection
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202500271
Jianhua Zhang, Jian Zhong, Bo Liang, Weijie Liu, Hengjie Zhang, Tianyou Wang, Liping Huang, Lei Yang, Zhipeng Gu, Yiwen Li
{"title":"Robust Injectable Hydrogels for Hemophilic Arthropathy via Anti-Inflammation, Iron Removal and Cartilage Protection","authors":"Jianhua Zhang, Jian Zhong, Bo Liang, Weijie Liu, Hengjie Zhang, Tianyou Wang, Liping Huang, Lei Yang, Zhipeng Gu, Yiwen Li","doi":"10.1002/adfm.202500271","DOIUrl":"https://doi.org/10.1002/adfm.202500271","url":null,"abstract":"Hemophilic arthropathy (HA), a form of arthritis associated with joint bleeding, presents extra challenges in treatment due to intermittent bleeding-induced iron-overloading, oxidative stress, and inflammation. Conventional therapeutic approaches have predominantly concentrated on achieving hemostasis and reducing inflammation, yet they have fallen short in effectively managing iron overload and safeguarding cartilage, resulting in less-than-ideal therapeutic outcomes. To address these issues, a series of injectable hydrogels is facilely fabricated via a one-step assembly of polyphenols, iron chelators, and lipoic acid. In vitro investigations demonstrate that the resulting hydrogels not only have good performances in antioxidation and anti-inflammation, but also exhibit promising prospects in iron removal, adhesion resistance, and wear resistance. Moreover, in vivo studies are further carried out to indicate the diminished inflammatory response, ameliorative iron-overload-related lesion indicators, and cartilage preservation. This class of robust and multifunctional injectable hydrogels composed of clinically available drugs along with commonly used and commercial ingredients would offer new opportunities toward the efficient treatment of HA.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"38 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745722","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
Biomimetic Piezoelectric Periosteum-Bone Integrated Implant Promotes Bone Defect Repair by Remodeling Osteogenic Microenvironment
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202423492
Xiaokun Yue, Xueheng Sun, Zilin Li, Tianchang Wang, Weiqing Kong, Shuai Li, Jing Shan, Hao Yang, Weize Kong, Wentao Li, Changru Zhang, Bin Cai, Kerong Dai, Yuxin Zhang, Xin Sun, Jinwu Wang
{"title":"Biomimetic Piezoelectric Periosteum-Bone Integrated Implant Promotes Bone Defect Repair by Remodeling Osteogenic Microenvironment","authors":"Xiaokun Yue, Xueheng Sun, Zilin Li, Tianchang Wang, Weiqing Kong, Shuai Li, Jing Shan, Hao Yang, Weize Kong, Wentao Li, Changru Zhang, Bin Cai, Kerong Dai, Yuxin Zhang, Xin Sun, Jinwu Wang","doi":"10.1002/adfm.202423492","DOIUrl":"https://doi.org/10.1002/adfm.202423492","url":null,"abstract":"Bone defects caused by trauma, infection, or tumors pose significant clinical challenges, particularly in large defects with poor healing outcomes. Traditional repair methods often fail to address the complex regenerative microenvironment. This study introduces a novel biomimetic piezoelectric periosteum-bone bilayer implant designed to remodel the osteogenic microenvironment and enhance bone defect repair. The implant comprises an upper electrospun polyvinylidene fluoride-curcumin-loaded magnesium metal–organic framework (PVDF-MOF/Cur, PMC) periosteum scaffold and a lower hydroxyapatite@gelatin methacrylate (HA@GelMA) bone scaffold (PMC+HA@GelMA, PMCG). In the whole PMCG bilayer implant, the upper PMC periosteum scaffold improves the piezoelectric properties of PVDF and enables sustained drug release via Mg-MOF loaded with Cur. Meanwhile, the lower HA@GelMA scaffold facilitates bone marrow mesenchymal stem cells osteogenic differentiation and bone regeneration. Additionally, the upper PMC scaffold further accelerates bone repair by promoting neuronal differentiation, as well as enhancing angiogenesis and regulating macrophage polarization. Transcriptome sequencing reveals that the implant activates key signaling pathways associated with angiogenesis, neurogenesis, inflammation regulation, and osteogenesis, including HIF-1α, PI3K-Akt, JAK-STAT, and TGF-β pathways. Thus, this work highlights the multifunctional capabilities of the biomimetic periosteum-bone bilayer implant to remodify the osteogenic microenvironment to accelerate bone defect repair, which offers a promising platform for advancing tissue repair.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"103 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745767","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
Chasing Charge Carriers: Diffusion Dynamics in Mixed-n Quasi-2D Colloidal MAPbBr3 Perovskites
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202500097
Ronja Maria Piehler, Eugen Klein, Francisco M. Gómez-Campos, Oliver Kühn, Rostyslav Lesyuk, Christian Klinke
{"title":"Chasing Charge Carriers: Diffusion Dynamics in Mixed-n Quasi-2D Colloidal MAPbBr3 Perovskites","authors":"Ronja Maria Piehler, Eugen Klein, Francisco M. Gómez-Campos, Oliver Kühn, Rostyslav Lesyuk, Christian Klinke","doi":"10.1002/adfm.202500097","DOIUrl":"https://doi.org/10.1002/adfm.202500097","url":null,"abstract":"In optoelectronic applications, metal halide perovskites (MHPs) are compelling materials because of their highly tunable and intensely competitive optical properties. Colloidal synthesis enables the controlled formation of various morphologies of MHP nanocrystals, all with different carrier properties and, hence, different optical and carrier transport behaviors. Three different methylammonium lead tribromide perovskite (MAPbBr<sub>3</sub>) morphologies: nanoplatelets (NPLs), nanosheets (NSs), and nanostripes (NSTs) are characterized and synthesized by hot-injection synthesis protocols with slightly different parameters. A fluorescence imaging microscope (FLIM) for time- and space-resolved measurements of the carrier migration is employed to quantify the charge carriers’ migration process upon photoexcitation. The results are rationalized in the 2D diffusion model framework, considering funneling and trapping processes in mixed-<i>n</i> colloidal MHPs. Subdiffusion mode is found to prevail in the nanocrystals, whereby the highest carrier diffusivity is found for bulk-like NSTs, followed by layered NSs and a film of NPLs. These findings provide a better understanding of optoelectronic processes in perovskites relevant to photovoltaic and light-emitting devices.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"12 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745518","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
Closed-Loop Recycling Methods to Treat Spent Cathode: Efficient and Direct Regeneration
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202503674
Zhe Gao, Yangyang Liu, Zeinhom M. El-Bahy, Gen Chen, Mohamed H. Helal, Bingan Lu, Junwei Han, Jiang Zhou
{"title":"Closed-Loop Recycling Methods to Treat Spent Cathode: Efficient and Direct Regeneration","authors":"Zhe Gao, Yangyang Liu, Zeinhom M. El-Bahy, Gen Chen, Mohamed H. Helal, Bingan Lu, Junwei Han, Jiang Zhou","doi":"10.1002/adfm.202503674","DOIUrl":"https://doi.org/10.1002/adfm.202503674","url":null,"abstract":"Direct regeneration of spent lithium batteries (LIBs) cathodes has emerged as a transformative regimen to address the urgent need for sustainable recycling methods and mitigate the critical shortage of metal resources driven by the escalating LIB demand. Unlike conventional methods focused on metal extraction and separation, direct regeneration restores the functionality of spent cathode in situ, streamlining the recycling process and enhancing efficiency. Effective regeneration necessitates a comprehensive understanding of cathode failure mechanisms and the pretreatment processes. Critical strategies include reducing lithium (Li) migration barrier to enable complete reinsertion into cathode structure and minimizing Li-transition metal anti-site defects to reconstruct the cathode lattice. This review summarizes advancements in failure mechanisms, pretreatment techniques, and the direct recycling strategies of spent cathode, emphasizing principles and innovations in direct regeneration. By evaluating the advantages and limitations of current approaches, opportunities are identified for innovation to overcome existing challenges. Future research priorities are proposed to advance direct regeneration technologies, fostering more efficient and sustainable LIB recycling systems.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"50 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745726","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
Dual-Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips-Bags for Year-Round Thermal Management
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202425458
Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch
{"title":"Dual-Mode Film Based on Highly Scattering Nanofibers and Upcycled Chips-Bags for Year-Round Thermal Management","authors":"Qimeng Song, Stefan Rettinger, Chengzhang Xu, Ulrich Mansfeld, Markus Retsch","doi":"10.1002/adfm.202425458","DOIUrl":"https://doi.org/10.1002/adfm.202425458","url":null,"abstract":"Advanced thermal management is crucial in mitigating the escalating global energy consumption and alleviating associated climatic and environmental issues. Here, a dual-mode film that integrates solar heating and radiative cooling functionalities for year-round thermal management is introduced. The cooling side of the film, composed of PCL-SiO<sub>2</sub> composite nanofibers, exhibits an impressive solar reflection of 0.98 and a mid-infrared emissivity of 0.91, resulting in sub-ambient cooling performance under intensive sunlight. Meanwhile, the heating side of the film, based on the ink side of the upcycled chip bags, efficiently harvests thermal energy from sunlight, leading to a temperature rise of 16.5 °C. The cooling and heating modes of the film can be switched by flipping it. With its outstanding optical properties, weathering durability, and switchable heating and cooling modes, the dual-mode film holds great potential for year-round energy savings with minimal environmental impact due to its sustainable composition and easy fabrication.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"23 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745512","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
Ultralong Afterglow of Zinc(II) Halide Complexes Enabled by Regulating the Arrangements of N-Methylbenzimidazole Ligands
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202425095
Guan-Huang Zhang, Hai-Ling Wang, Yun-Lan Li, Hua-Hong Zou, Fu-Pei Liang, Zhong-Hong Zhu
{"title":"Ultralong Afterglow of Zinc(II) Halide Complexes Enabled by Regulating the Arrangements of N-Methylbenzimidazole Ligands","authors":"Guan-Huang Zhang, Hai-Ling Wang, Yun-Lan Li, Hua-Hong Zou, Fu-Pei Liang, Zhong-Hong Zhu","doi":"10.1002/adfm.202425095","DOIUrl":"https://doi.org/10.1002/adfm.202425095","url":null,"abstract":"In this study, a simple and rapid strategy is developed for the gram-scale synthesis of zinc(II) halide complexes with ultralong afterglow under mild conditions. Crystalline, high-purity zinc(II) halide complexes are synthesized using <i>N</i>-methylbenzimidazole (<b>Bz</b>) and common zinc halide salts (ZnX<sub>2</sub>, X = Cl, Br, and I) as simple and cheap industrial raw materials by stirring at room temperature and atmospheric pressure. By exploiting the steric effect of terminal-coordinated halogen ions to regulate arrangements of the <b>Bz</b> ligands in the structure of zinc(II) halide complexes, namely <i>cis</i>-butterfly, <i>trans</i>-butterfly, and <i>cross</i>-arrangement, zinc(II) halide complexes with completely differentiated stacking modes are obtained. <b>Zn(Bz)Cl</b> with a <i>cis</i>-butterfly-shaped arrangement of the <b>Bz</b> ligands has the longest room-temperature phosphorescence (RTP) lifetime (505.01 ms at 298 K) and a long afterglow of up to 1.4 s. This study proposes for the first time the use of differentiated halogen end group coordination to regulate the arrangement of fluorophores within the structure of zinc(II) halide complexes, resulting in considerably improved RTP and long afterglow, thus providing a new platform for the large-scale synthesis of simple complexes with room-temperature ultralong afterglow.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"72 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745519","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
Control of Ferromagnetism of Vanadium Oxide Thin Films by Oxidation States
IF 19 1区 材料科学
Advanced Functional Materials Pub Date : 2025-04-01 DOI: 10.1002/adfm.202422966
Kwonjin Park, Jaeyong Cho, Soobeom Lee, Jaehun Cho, Jae-Hyun Ha, Jinyong Jung, Dongryul Kim, Won-Chang Choi, Jung-Il Hong, Chun-Yeol You
{"title":"Control of Ferromagnetism of Vanadium Oxide Thin Films by Oxidation States","authors":"Kwonjin Park, Jaeyong Cho, Soobeom Lee, Jaehun Cho, Jae-Hyun Ha, Jinyong Jung, Dongryul Kim, Won-Chang Choi, Jung-Il Hong, Chun-Yeol You","doi":"10.1002/adfm.202422966","DOIUrl":"https://doi.org/10.1002/adfm.202422966","url":null,"abstract":"Vanadium oxide (VO<i><sub>x</sub></i>) is a material of significant interest due to its metal-insulator transition (MIT) properties as well as its diverse stable antiferromagnetism depending on the valence states of V and O with distinct MIT transitions and Néel temperatures. Although several studies reported ferromagnetism in the VO<i><sub>x</sub></i>, it is mostly associated with impurities or defects, and pure VO<i><sub>x</sub></i> has rarely been reported as ferromagnetic. The research presents clear evidence of ferromagnetism in the VO<i><sub>x</sub></i> thin films, exhibiting a saturation magnetization of ≈13 kA m<sup>−1</sup> at 300 K. The 20-nm thick VO<i><sub>x</sub></i> thin films via reactive sputtering from a metallic vanadium target in various oxygen atmospheres is fabricated. The oxidation states of ferromagnetic VO<i><sub>x</sub></i> films show an ill-defined stoichiometry of V<sub>2</sub>O<sub>3+</sub><i><sub>p</sub></i>, where <i>p</i> = 0.05, 0.23, 0.49, with predominantly disordered microstructures. The ferromagnetic nature of these VO<i><sub>x</sub></i> films is confirmed through a strong antiferromagnetic exchange coupling with the neighboring ferromagnetic layer in the VO<i><sub>x</sub></i>/Co bilayers, in which the spin configurations of the Co layer is influenced strongly due to the additional anisotropy introduced by VO<i><sub>x</sub></i> layer. The present study highlights the potential of VO<i><sub>x</sub></i> as an emerging functional magnetic material with tunability by oxidation states for modern spintronic applications.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":"33 1","pages":""},"PeriodicalIF":19.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745524","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
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