Nano Letters最新文献_第9页

Dynamic Modulation of Coupled Plasmon Resonances in Antimony-Doped Tin Oxide Nanorod Metamaterial by Charge Carrier Injection. 电荷载流子注入对掺锑氧化锡纳米棒超材料耦合等离子体共振的动态调制。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-19 DOI: 10.1021/acs.nanolett.5c01485

Thomas Herzog,Atefeh Habibpourmoghadam,Nele Pannewitz,Yaşar Krysiak,Irene Morales,Sonja Locmelis,Antonio Calà Lesina,Sebastian Polarz

{"title":"Dynamic Modulation of Coupled Plasmon Resonances in Antimony-Doped Tin Oxide Nanorod Metamaterial by Charge Carrier Injection.","authors":"Thomas Herzog,Atefeh Habibpourmoghadam,Nele Pannewitz,Yaşar Krysiak,Irene Morales,Sonja Locmelis,Antonio Calà Lesina,Sebastian Polarz","doi":"10.1021/acs.nanolett.5c01485","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01485","url":null,"abstract":"Coupled plasmon resonances of adjacent particles in densely packed nanorod metamaterials can introduce extraordinary optical features, like cavity resonance modes. These modes, being commonly realized in metallic metamaterials, can be exploited for plasmonic sensing or optical modulation, due to strong optical and electrical field enhancement in the cavities. However, modulation of plasmon resonances in metallic nanostructures is limited due to their intrinsically high charge carrier concentration. We introduce a new metamaterial based on metal oxides, respectively an array composed of doped tin oxide nanorods featuring cavity resonance modes. By means of numerical simulations, the optical response of the fabricated plasmonic metamaterial is calculated and compared with the experimental findings in order to understand and clarify the nature of the optical modes. Moreover, dynamic modulation of the optical response is demonstrated by the electrochemical injection of electrons into the nanorods, thus paving the way to electro-optical modulation of such metamaterials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"128 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087686","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-Aligned Multilayered Nitrogen Vacancy Diamond Nanoparticles for High Spatial Resolution Magnetometry of Microelectronic Currents 用于微电子电流高空间分辨率磁强计的自对准多层氮空位金刚石纳米颗粒

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-19 DOI: 10.1021/acs.nanolett.5c00656

Yash Gokhale, Brandon S. Coventry, Tsani Rogers, Maya Lines, Anna Vena, Jack Phillips, Tianxiang Zhu, Ilhan Bok, Dariana Troche, Mitchell Glodowski, Adam Vareberg, Suyash Bhatt, Alireza Ousati Ashtiani, Kevin W. Eliceiri, Aviad Hai

{"title":"Self-Aligned Multilayered Nitrogen Vacancy Diamond Nanoparticles for High Spatial Resolution Magnetometry of Microelectronic Currents","authors":"Yash Gokhale, Brandon S. Coventry, Tsani Rogers, Maya Lines, Anna Vena, Jack Phillips, Tianxiang Zhu, Ilhan Bok, Dariana Troche, Mitchell Glodowski, Adam Vareberg, Suyash Bhatt, Alireza Ousati Ashtiani, Kevin W. Eliceiri, Aviad Hai","doi":"10.1021/acs.nanolett.5c00656","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00656","url":null,"abstract":"Nitrogen vacancy diamond nanoparticles (NVNPs) are increasingly integrated with methods for optical detection of magnetic resonance (ODMR), providing new opportunities spanning the visualization of magnetic fields in microelectronic circuits, environmental sensing, and biology. However, only a small number of studies utilize aggregates of NVNPs for surface-wide magnetometry, with the fact that spin orientations in aggregate NVNPs are inherently misaligned, precluding proper magnetic field detection, compared with expensive monocrystalline diamonds. A post-processing method for layering NVNPs with aligned center orientations can potentially facilitate superior NV magnetometry by allowing sensitive detection with a simplified probe preparation. We present novel technology for creating densely stacked NVNP monolayers with inherent interlayer alignment for sensitive measurement of local field perturbations in microelectronic traces. We establish spatial characteristics of deposited aggregates and demonstrate their ability to capture dipoles from conducting microwires via ODMR. Our approach forms a novel accessible protocol that can be used for broad applications in micromagnetometry.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"50 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087948","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

Spin Hall Conductivity in Bi1–xSbx as an Experimental Test of Bulk-Boundary Correspondence Bi1-xSbx中自旋霍尔电导率作为体边界对应的实验测试

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-19 DOI: 10.1021/acs.nanolett.5c01806

Yongxi Ou, Wilson Yánez-Parreño, Yu-sheng Huang, Supriya Ghosh, Cüneyt Şahin, Max Stanley, Sandra Santhosh, Saurav Islam, Anthony Richardella, K. Andre Mkhoyan, Michael E. Flatté, Nitin Samarth

{"title":"Spin Hall Conductivity in Bi1–xSbx as an Experimental Test of Bulk-Boundary Correspondence","authors":"Yongxi Ou, Wilson Yánez-Parreño, Yu-sheng Huang, Supriya Ghosh, Cüneyt Şahin, Max Stanley, Sandra Santhosh, Saurav Islam, Anthony Richardella, K. Andre Mkhoyan, Michael E. Flatté, Nitin Samarth","doi":"10.1021/acs.nanolett.5c01806","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01806","url":null,"abstract":"Bulk-boundary correspondence, a foundational principle underlying the electronic band structure and physical behavior of topological quantum materials, has been rigorously tested in topological systems that involve conserved charge currents. However, it remains unclear whether bulk-boundary correspondence should hold for nonconserved spin currents. We address this unresolved question by using spin-torque ferromagnetic resonance to accurately probe the charge-to-spin conversion efficiency in epitaxial thin films of a canonical topological insulator, Bi1–xSbx. We find that the measured effective spin Hall conductivity (SHC) agrees well with tight-binding calculations for the intrinsic SHC of the bulk bands. These results indicate that the strong spin–orbit entanglement of bulk states well below the Fermi energy connects directly to the SHC of surface states in epitaxial Bi1–xSbx films interfaced with a metallic ferromagnet. The excellent agreement between theory and experiment affirms the generic value of analyses focused entirely on bulk properties, even for nonconserved topological spin currents.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"134 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088104","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

Unraveling Multiregional Neural Patterns during Consciousness Transition Using Flexible Microelectrode Arrays Integrated with Neuropixels Chips 利用集成神经像素芯片的柔性微电极阵列揭示意识转换过程中的多区域神经模式

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-05-18 DOI: 10.1021/acs.nanolett.5c0166210.1021/acs.nanolett.5c01662

Xiangyu Wang, Mengcheng Liu, Jianfei Ding, Wen Gu, Huihui Tian, Ying Fang, Shouliang Guan* and Jinfen Wang*,

{"title":"Unraveling Multiregional Neural Patterns during Consciousness Transition Using Flexible Microelectrode Arrays Integrated with Neuropixels Chips","authors":"Xiangyu Wang, Mengcheng Liu, Jianfei Ding, Wen Gu, Huihui Tian, Ying Fang, Shouliang Guan* and Jinfen Wang*, ","doi":"10.1021/acs.nanolett.5c0166210.1021/acs.nanolett.5c01662","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01662https://doi.org/10.1021/acs.nanolett.5c01662","url":null,"abstract":"Consciousness transitions, including awakening from anesthesia or falling asleep, involve complex neural dynamics across multiple brain regions. Understanding these transitions requires simultaneous and stable monitoring of large-scale neural activity in freely moving animals. Here, a flexible microelectrode array system (FlexiPixels probe) is demonstrated that integrates a multishank flexible microelectrode array with Neuropixels chips. This lightweight FlexiPixels probe enables stable and long-term neural signal recording across multiple brain regions in freely moving rats and tracking of neuronal activities during consciousness transitions from anesthesia to wakefulness and subsequent sleep states. Distinct state-dependent firing patterns emerge across different brain regions and neuronal types. CA1 neurons show similar activity during wakefulness and sleep, while DG neurons exhibit unique anesthesia sensitivity. These findings demonstrate FlexiPixels’ capabilities for stable multiregion neural recording in freely moving animals and potential to unravel region-specific signatures in consciousness studies.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 21","pages":"8723–8731 8723–8731"},"PeriodicalIF":9.6,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146393","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

Unraveling Multiregional Neural Patterns during Consciousness Transition Using Flexible Microelectrode Arrays Integrated with Neuropixels Chips. 利用集成神经像素芯片的柔性微电极阵列揭示意识转换过程中的多区域神经模式。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-18 DOI: 10.1021/acs.nanolett.5c01662

Xiangyu Wang,Mengcheng Liu,Jianfei Ding,Wen Gu,Huihui Tian,Ying Fang,Shouliang Guan,Jinfen Wang

{"title":"Unraveling Multiregional Neural Patterns during Consciousness Transition Using Flexible Microelectrode Arrays Integrated with Neuropixels Chips.","authors":"Xiangyu Wang,Mengcheng Liu,Jianfei Ding,Wen Gu,Huihui Tian,Ying Fang,Shouliang Guan,Jinfen Wang","doi":"10.1021/acs.nanolett.5c01662","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01662","url":null,"abstract":"Consciousness transitions, including awakening from anesthesia or falling asleep, involve complex neural dynamics across multiple brain regions. Understanding these transitions requires simultaneous and stable monitoring of large-scale neural activity in freely moving animals. Here, a flexible microelectrode array system (FlexiPixels probe) is demonstrated that integrates a multishank flexible microelectrode array with Neuropixels chips. This lightweight FlexiPixels probe enables stable and long-term neural signal recording across multiple brain regions in freely moving rats and tracking of neuronal activities during consciousness transitions from anesthesia to wakefulness and subsequent sleep states. Distinct state-dependent firing patterns emerge across different brain regions and neuronal types. CA1 neurons show similar activity during wakefulness and sleep, while DG neurons exhibit unique anesthesia sensitivity. These findings demonstrate FlexiPixels' capabilities for stable multiregion neural recording in freely moving animals and potential to unravel region-specific signatures in consciousness studies.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"208 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144087690","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

Synthesis and Size-Dependent Optical Properties of Cd3P2 and (CdxZn1–x)3P2 Quantum Dots Cd3P2和（CdxZn1-x）3P2量子点的合成及尺寸相关光学性质

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-05-17 DOI: 10.1021/acs.nanolett.5c0098010.1021/acs.nanolett.5c00980

Logan Smith, Abdul Halim, K. Elena Harbison, Bibash Sapkota, Robert Klie, Benjamin T. Diroll and Igor Fedin*,

{"title":"Synthesis and Size-Dependent Optical Properties of Cd3P2 and (CdxZn1–x)3P2 Quantum Dots","authors":"Logan Smith, Abdul Halim, K. Elena Harbison, Bibash Sapkota, Robert Klie, Benjamin T. Diroll and Igor Fedin*, ","doi":"10.1021/acs.nanolett.5c0098010.1021/acs.nanolett.5c00980","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00980https://doi.org/10.1021/acs.nanolett.5c00980","url":null,"abstract":"Short-wave infrared (SWIR) materials are highly beneficial in telecommunications and medical imaging. Synthesis of quality SWIR chromophores remains challenging. Furthermore, many SWIR-emitting colloidal quantum dots (QDs) suffer from long radiative lifetimes and weak emission efficiencies. To address these challenges, we present methods to create a size series of Cd3P2 QDs and create a sizing curve. The results demonstrate that the growth kinetics and the production of Cd3P2 QDs with optical emission at 1.5+ μm are limited by the precursor stoichiometry. To address the overly long radiative lifetimes, we develop surface passivation with CdI2 and develop a one-pot, hot-injection synthesis of (CdxZn1–x)3P2 QDs, which is shown to accelerate the PL dynamics of Cd3P2 QDs. Electron microscopy and elemental analysis point to the Cd3P2/(CdxZn1–x)3P2 core/crust structure of these QDs. These results show promise for the further development of core/shell Cd3P2/Zn3P2 QDs, which will serve as on-demand single-photon emitters in the SWIR region.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 21","pages":"8527–8532 8527–8532"},"PeriodicalIF":9.6,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146398","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

Synthesis and Size-Dependent Optical Properties of Cd3P2 and (CdxZn1–x)3P2 Quantum Dots Cd3P2和（CdxZn1-x）3P2量子点的合成及尺寸相关光学性质

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-17 DOI: 10.1021/acs.nanolett.5c00980

Logan Smith, Abdul Halim, K. Elena Harbison, Bibash Sapkota, Robert Klie, Benjamin T. Diroll, Igor Fedin

{"title":"Synthesis and Size-Dependent Optical Properties of Cd3P2 and (CdxZn1–x)3P2 Quantum Dots","authors":"Logan Smith, Abdul Halim, K. Elena Harbison, Bibash Sapkota, Robert Klie, Benjamin T. Diroll, Igor Fedin","doi":"10.1021/acs.nanolett.5c00980","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00980","url":null,"abstract":"Short-wave infrared (SWIR) materials are highly beneficial in telecommunications and medical imaging. Synthesis of quality SWIR chromophores remains challenging. Furthermore, many SWIR-emitting colloidal quantum dots (QDs) suffer from long radiative lifetimes and weak emission efficiencies. To address these challenges, we present methods to create a size series of Cd3P2 QDs and create a sizing curve. The results demonstrate that the growth kinetics and the production of Cd3P2 QDs with optical emission at 1.5+ μm are limited by the precursor stoichiometry. To address the overly long radiative lifetimes, we develop surface passivation with CdI2 and develop a one-pot, hot-injection synthesis of (CdxZn1–x)3P2 QDs, which is shown to accelerate the PL dynamics of Cd3P2 QDs. Electron microscopy and elemental analysis point to the Cd3P2/(CdxZn1–x)3P2 core/crust structure of these QDs. These results show promise for the further development of core/shell Cd3P2/Zn3P2 QDs, which will serve as on-demand single-photon emitters in the SWIR region.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"97 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067514","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

Quantum-Sized Sb@Au Schottky Heterostructure for Sensitized Radioimmunotherapy 致敏放射免疫治疗的量子级Sb@Au肖特基异质结构

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-05-17 DOI: 10.1021/acs.nanolett.5c0177610.1021/acs.nanolett.5c01776

Chuang Shen, Xianghong Niu, Jianwei Chen, Fei Xu, Ming Liu, Yefan Duan, Hongfang Du, Qianshi Shang, Xiuyun Zhang, Ying Zhang*, Lixing Weng, Zhimin Luo* and Lianhui Wang*,

{"title":"Quantum-Sized Sb@Au Schottky Heterostructure for Sensitized Radioimmunotherapy","authors":"Chuang Shen, Xianghong Niu, Jianwei Chen, Fei Xu, Ming Liu, Yefan Duan, Hongfang Du, Qianshi Shang, Xiuyun Zhang, Ying Zhang*, Lixing Weng, Zhimin Luo* and Lianhui Wang*, ","doi":"10.1021/acs.nanolett.5c0177610.1021/acs.nanolett.5c01776","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01776https://doi.org/10.1021/acs.nanolett.5c01776","url":null,"abstract":"Radiodynamic therapy (RDT) holds great potential for overcoming radioresistance and enhancing tumor immunogenicity. However, its efficacy is hindered by limited reactive oxygen species (ROS) generation due to insufficient carrier generation and transfer, which often results in tumor metastasis. Here, we report quantum-sized and narrow-bandgap Sb@Au Schottky heterostructures, namely, Sb@Au nanodots (Sb@Au NDs), to improve ROS generation for sensitizing RDT and inhibiting tumor metastasis. Experimental results and density functional theory calculations show that Sb@Au NDs give narrow bandgap and high Schottky potential barrier for promoting carrier generation and separation under X-ray irradiation, and present rich active sites for improving catalytic performance, leading to abundant ROS generation and significantly amplifying intracellular oxidative stress to enhance RDT. Sb@Au ND-sensitized RDT greatly induces immunogenic cell death and thus promotes CD8+ T cell-mediated systemic immunity, ultimately suppressing tumor metastasis. Our finding highlights the potential of narrow-bandgap Sb@Au NDs as an effective sensitizer for radioimmunotherapy.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 21","pages":"8740–8749 8740–8749"},"PeriodicalIF":9.6,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144146395","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

Nanoscale Thermomechanical Coupling Study on the Aging of NASICON-Type Solid Electrolytes nasicon型固体电解质老化的纳米尺度热-机耦合研究

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-17 DOI: 10.1021/acs.nanolett.5c00971

Xuyang Wang, Fang Wang, Qingfeng Zhu, Mingqiang Cheng, Chunlin Song, Yingzhi Li, Zhouguang Lu, Hongyun Jin, Boyuan Huang

{"title":"Nanoscale Thermomechanical Coupling Study on the Aging of NASICON-Type Solid Electrolytes","authors":"Xuyang Wang, Fang Wang, Qingfeng Zhu, Mingqiang Cheng, Chunlin Song, Yingzhi Li, Zhouguang Lu, Hongyun Jin, Boyuan Huang","doi":"10.1021/acs.nanolett.5c00971","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00971","url":null,"abstract":"Previous investigations on the aging mechanism of solid electrolytes (SEs) predominantly focused on electrochemical and mechanical properties, often overlooking their thermal characteristics. In this study, we introduced scanning thermal microscopy and scanning thermo-ionic microscopy to delve into the microscopic aging process of the Li1.4Al0.4Ti1.6(PO4)3 (LATP) SE assembled with Li metal. Our findings revealed the formation of a Li3Al0.4Ti1.6(PO4)3 secondary phase during cycling. Compared with the unreacted LATP, this secondary phase exhibits a remarkable decrease in thermal conductivity (from 1.72 to 0.63 W m–1 K–1), Young’s modulus (from 117.4 to 31.3 GPa), and ionic activity, while demonstrating an increase in thermal expansion response. These mismatches worsen the interfacial contact, contributing to the formation of cracks and a sharp increase in impedance. To the best of our knowledge, this is the first time that the thermomechanical coupling of SEs has been studied at the nanoscale, underscoring the pivotal impact of the thermal properties on SE degradation.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"42 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067515","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

Observation of Atomic-Scale Polar Vortex–Antivortex Pairs in Antiferroelectric PbZrO3 Thin Films 反铁电PbZrO3薄膜中原子尺度极性涡-反涡对的观测

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-05-17 DOI: 10.1021/acs.nanolett.5c01506

Xian-Kui Wei, Ke Xu, Kaushik Vaideeswaran, Joachim Mayer, Houbing Huang

{"title":"Observation of Atomic-Scale Polar Vortex–Antivortex Pairs in Antiferroelectric PbZrO3 Thin Films","authors":"Xian-Kui Wei, Ke Xu, Kaushik Vaideeswaran, Joachim Mayer, Houbing Huang","doi":"10.1021/acs.nanolett.5c01506","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01506","url":null,"abstract":"Topological polar structures, in analogy to spin vortices and skyrmions, have received tremendous attention for their fascinating prospects in future device applications. However, in the widely studied ferroelectric-based superlattices, the epitaxial heterointerfaces, yielding desired strain, depolarization, and gradient energies, greatly confine the mobility of the topological solitons. Here, we report observation of polar vortex–antivortex pairs near junctions of antiphase boundaries in antiferroelectric PbZrO3 thin films by using atomic-resolution scanning transmission electron microscopy. Our temporal-resolved lattice analysis reveals that the local strain gradient caused by an incommensurate modulation constructs the smallest topological units reported to date. Our phase-field simulations unveil that the Pb–O vacancy-induced random electric fields account for their three-dimensional formation, and the stimulus of electron-beam irradiation can drive their dynamic migration. The findings offer a new approach to comprehend fundamental physics about antiferroelectricity and the design of functional devices based on topological structures in antiferroelectric thin films.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"7 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144067516","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