Nano Letters最新文献_第6页

Vanadium-Doped Hafnium Oxide: A High-Endurance Ferroelectric Thin Film with Demonstrated Negative Capacitance

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c05671

Ehsan Ansari, Niccolò Martinolli, Emeric Hartmann, Anna Varini, Igor Stolichnov, Adrian Mihai Ionescu

{"title":"Vanadium-Doped Hafnium Oxide: A High-Endurance Ferroelectric Thin Film with Demonstrated Negative Capacitance","authors":"Ehsan Ansari, Niccolò Martinolli, Emeric Hartmann, Anna Varini, Igor Stolichnov, Adrian Mihai Ionescu","doi":"10.1021/acs.nanolett.4c05671","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05671","url":null,"abstract":"This study proposes and validates a novel CMOS-compatible ferroelectric thin-film insulator made of vanadium-doped hafnium oxide (V:HfO2) by using an optimized atomic layer deposition (ALD) process. Comparative electrical performance analysis of metal–ferroelectric–metal capacitors with varying V-doping concentrations, along with advanced material characterizations, confirmed the ferroelectric behavior and reliability of V:HfO2. With remnant polarization (Pr) values up to 20 μC/cm2, a coercive field (Ec) of 1.5 MV/cm, excellent endurance (>1011 cycles without failure, extrapolated to 1012 cycles), projected 10-year nonvolatile retention (>100 days measured), and large grain sizes of ∼180 nm, V:HfO2 emerges as a promising robust candidate for nonvolatile memory and neuromorphic applications. Importantly, negative capacitance (NC) effects were observed and analyzed in V:HfO2 through pulsed measurements, demonstrating its potential for NC applications. Finally, this novel ferroelectric shows potential as a gating insulator for future 3-terminal vanadium dioxide Mott-insulator devices and sensors, achieved through an all-ALD process.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"78 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258439","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-Assembly Design of a Robust 2D Frustrated Magnet with Bilayer Tetragonal Spin–Lattice 具有双层四方自旋晶格的坚固二维受挫磁体的自组装设计

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c05397

Jianpei Xing, Bo Zhao, Jinchao Kang, Yan Qi, Qinxi Liu, Xue Jiang, Jijun Zhao

{"title":"Self-Assembly Design of a Robust 2D Frustrated Magnet with Bilayer Tetragonal Spin–Lattice","authors":"Jianpei Xing, Bo Zhao, Jinchao Kang, Yan Qi, Qinxi Liu, Xue Jiang, Jijun Zhao","doi":"10.1021/acs.nanolett.4c05397","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05397","url":null,"abstract":"We intentionally designed a stable two-dimensional (2D) bilayer dimer system, OsFeP4, which serves as a tunable spin-5/2 J1-J2 anisotropic Heisenberg-like model to investigate frustrated magnetism. The frustrated state of 2D OsFeP4 originates from the robust intradimer ferromagnetic (FM) exchange coupling (J⊥) and a subtle competition between P4 molecules mediating interdimer ferromagnetic (J∥) and antiferromagnetic (AFM) exchange coupling (J×). This is further supported by a significant broadening of the specific heat peak, a high frustration factor (θCW/TN) of 4.17, the peak at the gamma point in the static structural factor, and short-range spin textures. Moreover, we employ strain to modulate the frustration parameter J×/J∥ from 0.23 to 0.4 and spin direction from in-plane to out-of-plane. The FM, AFM, and frustrated phase transitions are identified in the J⊥–J×–J∥ ternary phase diagram. This work will enrich our understanding of the frustration mechanisms in the 2D limit.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"123 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367451","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

Unusually High Thermopower in Molecular Junctions from Molecularly Induced Quantized States in Their Semimetal Leads

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c05852

Mor Cohen Jungerman, Shachar Shmueli, Pini Shekhter, Yoram Selzer

引用次数: 0

Solution-Processed Near Unit Carbon Dots-Based Deep-Blue Electroluminescent Light-Emitting Diodes with External Quantum Efficiency over 10%

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c06638

Boyang Wang, Jingkun Yu, Shurong Ding, Hongwei Wang, Yongsheng Hu, Siyu Lu

{"title":"Solution-Processed Near Unit Carbon Dots-Based Deep-Blue Electroluminescent Light-Emitting Diodes with External Quantum Efficiency over 10%","authors":"Boyang Wang, Jingkun Yu, Shurong Ding, Hongwei Wang, Yongsheng Hu, Siyu Lu","doi":"10.1021/acs.nanolett.4c06638","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06638","url":null,"abstract":"Deep-blue electroluminescent light-emitting diodes (ELEDs) are crucial for various applications, including solid-state lighting, high-density information storage, and vibrant displays. Currently, the development of conventional deep-blue ELEDs is predominantly based on multilayer evaporation structures. Despite significant technological progress, the fabrication of electroluminescent devices via low-cost solution processing has still not fully been realized. Given that, a novel approach for their development based on deep-blue emission carbon dots (CDs) has been proposed in this study. The as-prepared CDs exhibited a quantum yield close to 100% and a high exciton binding energy. The CDs-based ELEDs provided deep-blue emission at a wavelength of 450 nm, with CIE coordinates of (0.15, 0.07), closely approaching the standard color of the Rec. 2020 specification (0.131, 0.046). These results provide sufficient evidence that the devices fabricated in this work are one of the highest-performing CDs-based ELEDs developed so far, providing a quantum efficiency of over 10%.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"11 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367255","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 Hyperbolic Dispersion Branches and Broadband Canalization in a Phonon-Polaritonic Heterostructure

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c04633

Jiaqi Zhu, Youning Gong, Jun Liang, Yanyu Zhao, Zhe Cui, Delong Li, Qingdong Ou, Yupeng Zhang, Guo Ping Wang

{"title":"Multiple Hyperbolic Dispersion Branches and Broadband Canalization in a Phonon-Polaritonic Heterostructure","authors":"Jiaqi Zhu, Youning Gong, Jun Liang, Yanyu Zhao, Zhe Cui, Delong Li, Qingdong Ou, Yupeng Zhang, Guo Ping Wang","doi":"10.1021/acs.nanolett.4c04633","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04633","url":null,"abstract":"Hyperbolic polaritons in anisotropic crystals hold great promise for guiding the flow of light at deep-subwavelength scales. However, conventional hyperbolic dispersion with a single pair of symmetric branches inherently confines polaritons to propagate only within specific spatial directions. Here we demonstrate a multibranch in-plane hyperbolic dispersion in a phonon-polaritonic heterostructure composed of α-phase molybdenum trioxide (α-MoO3) and 4H-silicon carbide (4H-SiC). Leveraging the in-plane hyperbolicity of α-MoO3 and the interlayer coupling with 4H-SiC, the polaritons manifest distinct dispersive responses along the mutually orthogonal crystal directions of α-MoO3, enabling asymmetric multidirectional polariton propagation. Furthermore, the dispersion contours of polaritons along the [100] crystal direction of α-MoO3 evolves into flat bands as the frequency decreases, yielding broadband polariton canalization in the low-frequency region. These findings deepen our understanding of the evolution of polariton dispersions in α-MoO3/4H-SiC heterostructures and highlight the potential of this phonon-polaritonic heterostructure as a versatile platform for nanolight manipulation.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"62 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258437","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

Mechanochromic and Conductive Gels Based on Cellulose Nanocrystals for Bioinspired Sensing

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c06047

Di Lu, Zhen Fang, Zhuhui Qiao

引用次数: 0

Ligand-Targeted Ag9 Cluster Self-Cascade Antioxidants for Enhanced Reactive Oxygen Species Clearance in the Treatment of Inflammatory Bowel Disease

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c06440

Ya-Meng Xie, Yue Wang, Geng Zhang, Zhi Wang, Hai-Feng Su, Xiqing Cheng, Jiayu Huang, Di Sun, Wen-Gang Li, Qin Kuang

{"title":"Ligand-Targeted Ag9 Cluster Self-Cascade Antioxidants for Enhanced Reactive Oxygen Species Clearance in the Treatment of Inflammatory Bowel Disease","authors":"Ya-Meng Xie, Yue Wang, Geng Zhang, Zhi Wang, Hai-Feng Su, Xiqing Cheng, Jiayu Huang, Di Sun, Wen-Gang Li, Qin Kuang","doi":"10.1021/acs.nanolett.4c06440","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06440","url":null,"abstract":"Atomically precise metal nanoclusters (MNCs) with flexible peripheral ligands provide selective channels and unique electronic structures to the rigid metal core, showing great application potential in many fields such as biomimetic nanozymes. In this study, we developed cost-effective, low-toxicity, and water-soluble MNC based self-cascade antioxidants for enhanced reactive oxygen species clearance. Compared to Ag nanoparticles, the Ag9 NCs with a monovalent Ag core coordinated by nonmetallic S and O show superior superoxide dismutase-like (inhibition 86.7%) and catalase-like (Km = 20.37 mM, Vmax = 3.13 × 10–3 mM s–1) activities. Interestingly, the −COOH groups on the ligands endow Ag9 NCs with a −42.5 mV negative surface charge, enhancing the targeting to inflammatory cells. Additionally, Ag9 NCs’ remarkable therapeutic effects have been confirmed in cell cultures and an inflammatory bowel disease (IBD) model. Thus, this study proposes a novel cluster-based nanozyme that utilizes ligands for targeting and monovalent metal cores for catalysis, demonstrating significant therapeutic potential for IBD treatment.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"123 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258441","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

Advanced Dual-Cross-Linking Strategy for Upgrading Formaldehyde-Free Olefin Adhesives

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c06353

Zhenxuan Liang, Junfang Xue, Qian Yan, Yi Sun, Shaoyu Luo, Yisheng Zhu, Shifeng Zhang

引用次数: 0

Correction to “Ultrasmall Prussian Blue Nanozyme Attenuates Osteoarthritis by Scavenging Reactive Oxygen Species and Regulating Macrophage Phenotype”

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.5c00421

Zhiguo Qin, Xiaofei Li, Peng Wang, Qian Liu, Yan Li, Aihua Gu, Qing Jiang, Ning Gu

{"title":"Correction to “Ultrasmall Prussian Blue Nanozyme Attenuates Osteoarthritis by Scavenging Reactive Oxygen Species and Regulating Macrophage Phenotype”","authors":"Zhiguo Qin, Xiaofei Li, Peng Wang, Qian Liu, Yan Li, Aihua Gu, Qing Jiang, Ning Gu","doi":"10.1021/acs.nanolett.5c00421","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00421","url":null,"abstract":"The authors regret that the fluorescence microscopy images of intracellular ROS in the H2O2 group and USPBNPs-1 μg/mL group in Figure 3a were used with a mistake. The corrected images in the H2O2 group and USPBNPs-1 μg/mL group in Figure 3a are shown below. This figure mainly showed the scavenging efficiency of a series of concentrations of USPBNPs on intracellular ROS, which was used to screen out the optimal concentration of nanozyme. According to the results of fluorescence microscopy (Figure 3a) and flow cytometry (Figure 3b), the optimal concentration was confirmed to be 5–10 μg/mL. Therefore, the replacement of this image does not affect the conclusion in the paper. Figure 3. Effect of USPBNPs on ROS and inflammatory factors. The scavenging efficiency of USPBNPs on intracellular ROS examined by fluorescence microscopy (a) and flow cytometry (b), *p < 0.05, compared with the H2O2 group. (c) mRNA expression levels of IL-6, TNF-α, and MMP-13. The results are expressed as means ± SD (n = 3). *p < 0.05, **p < 0.01, ***p < 0.005. This article has not yet been cited by other publications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"55 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143367426","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

High-Throughput Screening of Selective Bimetallic Atomic Catalysts for Self-Adaptive Matched Electrochemical Reduction

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-02-07 DOI: 10.1021/acs.nanolett.4c06524

Zong-Yin Song, Pei-Hua Li, Yong-Yu Li, Meng Yang, Jing-Yi Lin, Bo-Ping Xiong, Rui-Ze Xia, Xin Cai, Wanchun Duan, Shi-Hua Chen, Lina Li, Wen-Qing Liu, Xing-Jiu Huang

{"title":"High-Throughput Screening of Selective Bimetallic Atomic Catalysts for Self-Adaptive Matched Electrochemical Reduction","authors":"Zong-Yin Song, Pei-Hua Li, Yong-Yu Li, Meng Yang, Jing-Yi Lin, Bo-Ping Xiong, Rui-Ze Xia, Xin Cai, Wanchun Duan, Shi-Hua Chen, Lina Li, Wen-Qing Liu, Xing-Jiu Huang","doi":"10.1021/acs.nanolett.4c06524","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06524","url":null,"abstract":"Due to the impediments of spatial and temporal resolution, the comprehension of microdynamic processes still remains limited, which seriously hinders the advancement of catalyst regulating and the expansion of application. Herein, the efficient selective bimetallic atomic electrode interface was cultivated via high-throughput screening, achieving self-adaptive parallel electrochemical reduction of Cu(II) and As(III). Combined in situ X-ray absorption fine structure (XAFS) spectroscopy and coordination field theory verified the Ni–Cu specific energy level matching promoted by permitted d–d transition and also reproduced the microscopic dynamic reduction process. Additionally, it was discovered that the Fe–As specific bonding and energy barrier of the smallest potential-determining step (1.40 eV) were derived from the linear shift of the main s and p peaks of the key arsenic intermediates to the high-energy orbital. This work offers insights into transient reaction dynamics by in situ methods and theoretical simulations, which broadens the design of multisite atomic catalysts.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"16 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143258444","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