Nano Letters最新文献_第6页

Decoupling Josephson Coupling and Supercurrent Nonreciprocity in Twisted NbSe2/NbSe2 van der Waals Junctions 扭曲NbSe2/NbSe2范德华结的解耦、约瑟夫森耦合和超电流非互易

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-23 DOI: 10.1021/acs.nanolett.6c03685

Seung-Gi Lee, Kwon-Neong Jung, Jae-Keun Kim, Jae-Chun Jeon, Jiho Yoon, Stuart S. P. Parkin, Kun-Rok Jeon

{"title":"Decoupling Josephson Coupling and Supercurrent Nonreciprocity in Twisted NbSe2/NbSe2 van der Waals Junctions","authors":"Seung-Gi Lee, Kwon-Neong Jung, Jae-Keun Kim, Jae-Chun Jeon, Jiho Yoon, Stuart S. P. Parkin, Kun-Rok Jeon","doi":"10.1021/acs.nanolett.6c03685","DOIUrl":"10.1021/acs.nanolett.6c03685","url":null,"abstract":"The microscopic originof supercurrent nonreciprocityin van derWaals Josephson junctions remains under debate, particularly regardingthe role of twist-angle engineering. Here, we investigate twistedNbSe2/NbSe2 vertical Josephson junctions withcontrolled crystallographic alignment and clean interfaces. High-resolutiontransmission electron microscopy directly determines the twist angleand interface quality. While Josephson coupling exhibits a pronouncedtwist-angle dependence, the supercurrent diode efficiency remainssmall and shows no systematic angular dependence. In contrast, enhanceddiode responses emerge in weakly coupled junctions with reduced transparencyand interfacial disorder. Deliberate interface degradation furtherenhances the diode efficiency to nearly 30% and produces irregularmagnetic-field dependence. These results demonstrate a clear decouplingbetween Josephson coupling and supercurrent nonreciprocity, indicatingthat interfacial disorder rather than twist-angle-controlled momentummatching plays a dominant role in the observed diode response. Ourfindings establish an important benchmark for understanding nonreciprocalsuperconducting transport in van der Waals Josephson devices in thefuture.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14993–15001"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149241963","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

The Role of Atomistic Tip Morphology in Tip-Enhanced Electronic Energy Transfer 原子尖端形态在尖端增强的电子能量传递中的作用

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-22 DOI: 10.1021/acs.nanolett.6c03248

Pablo Grobas Illobre, Sveva Sodomaco, Piero Lafiosca, Tommaso Giovannini, Chiara Cappelli

引用次数: 0

Unraveling the Effect of Tensile Strain on Electrochemical CO2 Reduction 揭示拉伸应变对电化学CO2还原的影响

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-22 DOI: 10.1021/acs.nanolett.6c04162

Qing Yuan, Chengdi Huang, Xuan Yang

{"title":"Unraveling the Effect of Tensile Strain on Electrochemical CO2 Reduction","authors":"Qing Yuan, Chengdi Huang, Xuan Yang","doi":"10.1021/acs.nanolett.6c04162","DOIUrl":"10.1021/acs.nanolett.6c04162","url":null,"abstract":"Introducing tensile strain into copper-based (Cu-based)catalystsis a promising strategy for improving the performance of the electrochemicalCO2 reduction reaction (CO2RR). However, isolatingthe influence of the strain effect remains challenging owing to theconvoluted contributions from grain boundaries, ligands, and facets.Herein, we utilize in situ attenuated total reflectancesurface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) toisolate the effect of strain on the CO2RR performance anddetermine the strain–activity correlations by taking advantageof synthesizing colloidal nanoparticles with well-defined structures.Tensile strain is shown to modulate CO2RR performance bytuning the CO binding strength of the Cu-based catalysts. Medium tensilestrain leads to moderate CO adsorption, which is beneficial for theformation of multicarbon products. Excessively strong CO adsorptionwould instead hinder the CO2RR and promote the hydrogenevolution reaction. This work provides experimental evidence for therational design of high-performance CO2RR catalysts toproduce C2+ products via strain engineering.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15124–15130"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149230217","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

Probing the Anomalous Symmetry Breaking in Kagome Material CsV3Sb5 via Third-Order Nonlinearity 利用三阶非线性研究Kagome材料CsV3Sb5的反常对称性破缺

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-09-30 DOI: 10.1021/acs.nanolett.6c02890

Zheng Dai, Fengyi Guo, Shuai Zhang, Xiubing Li, Congcong Li, Yufan Ju, Ziqi Wang, Bin Cheng, Zhe Ying, Fengqi Song

{"title":"Probing the Anomalous Symmetry Breaking in Kagome Material CsV3Sb5 via Third-Order Nonlinearity","authors":"Zheng Dai, Fengyi Guo, Shuai Zhang, Xiubing Li, Congcong Li, Yufan Ju, Ziqi Wang, Bin Cheng, Zhe Ying, Fengqi Song","doi":"10.1021/acs.nanolett.6c02890","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c02890","url":null,"abstract":"The kagome material has rapidly established itself asa researchfrontier in condensed matter physics, owing to its distinctive geometricstructure and the rich array of unconventional physical phenomena.In the kagome AV3Sb5 (A = K, Rb, and Cs) family,the charge-ordered state exhibits a remarkable characteristic, i.e.,anomalous symmetry breaking, which is tied to the topological natureof the electronic band structure. Here, we report the third-ordernonlinear longitudinal and Hall responses that persist stably up toroom temperature in the kagome material CsV3Sb5. Notably, the nonlinear responses demonstrate significant transitionbelow the charge density wave (∼77 K) order and anomalous symmetry-breaking(∼39 K) state. The scaling analysis indicates that the third-ordernonlinear transport is governed jointly by the quantum geometric contributionand extrinsic scattering. This study advances the understanding ofthe third-order nonlinear transport and provides a distinct methodto detect anomalous symmetry breaking in CsV3Sb5.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14863–14869"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149308289","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

Iron-Chelating Nanoparticles Enable Cytoprotection against Ferroptosis In Vitro and In Vivo 铁螯合纳米颗粒在体外和体内对细胞凋亡具有保护作用

IF 10.8 1区材料科学

Nano Letters Pub Date : 2026-11-04 DOI: 10.1021/acs.nanolett.6c02720

Juyeon Kim,Jaewoo Lee,Gyusang Yu,Seh Ri Oh,Yunseo Jung,Shafinaz Abd Gani,Sungmin Nam,Nathaniel S. Hwang

{"title":"Iron-Chelating Nanoparticles Enable Cytoprotection against Ferroptosis In Vitro and In Vivo","authors":"Juyeon Kim,Jaewoo Lee,Gyusang Yu,Seh Ri Oh,Yunseo Jung,Shafinaz Abd Gani,Sungmin Nam,Nathaniel S. Hwang","doi":"10.1021/acs.nanolett.6c02720","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c02720","url":null,"abstract":"Ferroptosis, an iron-dependent form of regulated cell death driven by lipid peroxidation and mitochondrial dysfunction, contributes to degenerative and ischemic diseases, yet strategies that simultaneously control labile iron and oxidative stress remain limited. Here, we developed mesoporous polydopamine nanoparticles (PDNs) with intrinsic antioxidant and iron-chelating properties. PDNs scavenged free radicals, reduced intracellular Fe2+ levels, preserved mitochondrial function, and rescued ferroptotic cell death in iron overload- and erastin-induced models. Untargeted metabolomics revealed that PDNs restored ferroptosis-associated metabolic profiles, including metabolites related to glutathione metabolism and energy production. In an erastin-induced muscle ferroptosis model, PDNs reduced lipid peroxidation and restored GPX4 expression. In a hindlimb ischemia model, PDNs enhanced blood perfusion and vascular recovery. Together, these findings establish PDNs as a multifunctional nanoplatform that suppresses ferroptosis through coordinated regulation of iron homeostasis, redox balance, mitochondrial function, and metabolism, offering a promising therapeutic strategy for ferroptosis-associated muscle degeneration and ischemic injury.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"5 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359316","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

Streptavidin–Biotin Binding Is Intrinsically Noncooperative, but Experimental Artifacts Can Induce Apparent Positive Cooperativity 链霉亲和素与生物素的结合本质上是非合作的，但实验人工制品可以诱导明显的积极合作

IF 10.8 1区材料科学

Nano Letters Pub Date : 2026-11-04 DOI: 10.1021/acs.nanolett.6c04487

Malavika Kayyil Veedu,Eléonore Martenne Duplan,Saurabh Rai,Prithu Roy,Jérôme Wenger

{"title":"Streptavidin–Biotin Binding Is Intrinsically Noncooperative, but Experimental Artifacts Can Induce Apparent Positive Cooperativity","authors":"Malavika Kayyil Veedu,Eléonore Martenne Duplan,Saurabh Rai,Prithu Roy,Jérôme Wenger","doi":"10.1021/acs.nanolett.6c04487","DOIUrl":"https://doi.org/10.1021/acs.nanolett.6c04487","url":null,"abstract":"The biotin–streptavidin interaction is a key component of nanobiotechnology, yet the nature of its cooperativity remains a debated question. Here, we introduce a label-free spectroscopy approach based on confocal UV autofluorescence microscopy to probe the binding cooperativity of this high-affinity system. By leveraging the intrinsic autofluorescence of tryptophan residues, we avoid artifacts associated with extrinsic fluorescent labels, enabling precise measurements of fully biotin-saturated streptavidin across a wide range of molar ratios. Our experimental results, supported by Monte Carlo simulations, provide conclusive evidence for the absence of cooperativity. However, we show that false signs of apparent positive cooperativity can emerge from local concentration inhomogeneities occurring when rapid reaction kinetics outpace mixing. By establishing the noncooperative nature of biotin–streptavidin binding and identifying the key conditions to avoid cooperativity artifacts, these insights resolve a longstanding debate and offer critical implications for streptavidin-based biotechnological applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"18 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149359315","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

Magnetic Phase Diagram of Cr2Te3: The Hidden Role of Layer Stacking Cr2Te3的磁相图：层堆叠的隐藏作用

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-20 DOI: 10.1021/acs.nanolett.6c03322

Cyriack Jego, Thierry Sauvage, Nicolas Gauthier, Quentin Guillet, Jean-François Jacquot, Isabelle Gomes de Moraes, Damien Caliste, Pascal Pochet, Denis Jalabert, Hanako Okuno, Thomas Olsen, Alain Marty, Matthieu Jamet

{"title":"Magnetic Phase Diagram of Cr2Te3: The Hidden Role of Layer Stacking","authors":"Cyriack Jego, Thierry Sauvage, Nicolas Gauthier, Quentin Guillet, Jean-François Jacquot, Isabelle Gomes de Moraes, Damien Caliste, Pascal Pochet, Denis Jalabert, Hanako Okuno, Thomas Olsen, Alain Marty, Matthieu Jamet","doi":"10.1021/acs.nanolett.6c03322","DOIUrl":"10.1021/acs.nanolett.6c03322","url":null,"abstract":"Using two-dimensional (2D) van der Waals (vdW) ferromagnetsinspintronic devices can enhance their performance through well-controlledvdW interfaces and reduced power consumption. Cr2Te3 appears as a promising candidate because of its strong perpendicularmagnetic anisotropy, but the Curie temperature is limited to 180 K.In this work, we use annealing in air to uncover the magnetic phasediagram of Cr2Te3. We correlate magnetic propertieswith layer stacking and the interlayer distance; both depend stronglyon the annealing temperature. In particular, disorder in layer stackingplays a key role in the magnetic properties of Cr2Te3 and more generally of vdW ferromagnets. By annealing at 375°C, we can eventually raise the Tc of Cr2Te3 up to 303 K in the epitaxial Cr2Te3/WSe2 vdW heterostructure with in-planemagnetic anisotropy. This work provides a simple method to controlthe magnetic properties of 2D ferromagnets and incorporate them intospintronics devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"14914–14921"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221740","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 Mechanistic Insights into the Divergent Electrochemical Behaviors of Li, Na, and K in Metal Sulfur Batteries 金属硫电池中Li， Na和K不同电化学行为的原位机理研究

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-22 DOI: 10.1021/acs.nanolett.6c03870

Xinting Cao, Guoquan Sun, Ze Hua, Lei Zhou, Peifeng Gao, Li Yan, Lixia Bao, Xiaoxue Chang, Leining Zhang, Guoqiang Tan, Lihua Wang, Xintao Zuo, Ruiwen Shao

引用次数: 0

Toward Two-Dimensional MoS2 Electrets with Modulated Fluorescence 具有调制荧光的二维mos2驻极体

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-16 DOI: 10.1021/acs.nanolett.6c03760

Eugenio Lunedei, Andrea Liscio, Francesco Borgatti, Edoardo Chini, Pasquale D’Angelo, Fiorenza Esposito, Niccolò Borghi, Matteo Mannini, Denis Gentili, Luca Seravalli, Massimiliano Cavallini

{"title":"Toward Two-Dimensional MoS2 Electrets with Modulated Fluorescence","authors":"Eugenio Lunedei, Andrea Liscio, Francesco Borgatti, Edoardo Chini, Pasquale D’Angelo, Fiorenza Esposito, Niccolò Borghi, Matteo Mannini, Denis Gentili, Luca Seravalli, Massimiliano Cavallini","doi":"10.1021/acs.nanolett.6c03760","DOIUrl":"10.1021/acs.nanolett.6c03760","url":null,"abstract":"We show how spatially controlled sulfur vacancy engineeringenablesmonolayer MoS2 to act as an electret, storing quasi-permanentelectrostatic charge within a single atomic layer and modulating itsemission properties. Sulfur vacancies are created by stamp-assisted,electrode-free electrochemical nanolithography, yielding tunable defectdensities from 1010 to 1013 cm–2. The vacancy domains act as electron traps, resulting in surfacecharge density up to 1 μC cm–2, with chargeretention exceeding 300 days under ambient conditions. Kelvin probeand electric force microscopies reveal electrostatic patterns replicatingthe lithographic motif. These domains also define a colocalized exciton-quenchingregions in fluorescence microimages. They modulate the exciton fluorescencelifetime recorded at room temperature from tens of nanoseconds toa few hundred picoseconds by enhanced nonradiative exciton deactivationand induce a different balancing between excitons and trion emissionvia free electron draining from the untreated zones of the crystal.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15039–15046"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149210019","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

Role of Stereochemistry on Electron Transport in Peptides 立体化学在多肽电子传递中的作用

IF 9.1 1区材料科学

Nano Letters Pub Date : 2026-11-04 Epub Date: 2026-10-21 DOI: 10.1021/acs.nanolett.6c04036

Rajarshi Samajdar, Hemani Chhabra, Moeen Meigooni, Seungjoo Yi, Xiaolin Liu, Jason L. Wu, Emad Tajkhorshid, Charles M. Schroeder

{"title":"Role of Stereochemistry on Electron Transport in Peptides","authors":"Rajarshi Samajdar, Hemani Chhabra, Moeen Meigooni, Seungjoo Yi, Xiaolin Liu, Jason L. Wu, Emad Tajkhorshid, Charles M. Schroeder","doi":"10.1021/acs.nanolett.6c04036","DOIUrl":"10.1021/acs.nanolett.6c04036","url":null,"abstract":"Stereochemistry underlies structure–function relationshipsacross biology and materials science. Here, we investigate electrontransport in oligopeptide stereoisomers using single-molecule experimentsand computational modeling. Our results show that stereochemical modificationsin tyrosine-based peptides lead to significant variations in molecularconductance and transport distance along the peptide backbone, associatedwith changes in aromatic side-chain interactions and electronic coupling.In alanine-based peptides, stereochemical modifications alter molecularconductance through secondary-structure interactions associated withβ-turn conformations. Molecular dynamics simulations and quantummechanical calculations reveal the molecular origins of these stereochemistry-dependentstructural and electronic properties. Overall, this work shows thatstereochemical modification of nonterminal amino acids provides ameans to control electron transport through distinct mechanisms involvingaromatic side-chain interactions and secondary structure. These resultsestablish stereochemistry as a molecular design parameter for controllingelectron transport in peptide-based electronic materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 43","pages":"15097–15105"},"PeriodicalIF":9.1,"publicationDate":"2026-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149226571","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