Nano Letters最新文献_第5页

Janus Asymmetric-Wettability Cellulosic Triboelectric Materials Enabled by Noncovalent Interactions. 非共价相互作用下的非对称润湿性纤维素摩擦电材料。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-09-04 DOI: 10.1021/acs.nanolett.5c03791

Rongrong Liang, Tao Liu, Huanjie He, Yanhua Liu, Xuedi Li, Xue Cui, Song Zhang, Dengjun Lu, Shuangxi Nie

{"title":"Janus Asymmetric-Wettability Cellulosic Triboelectric Materials Enabled by Noncovalent Interactions.","authors":"Rongrong Liang, Tao Liu, Huanjie He, Yanhua Liu, Xuedi Li, Xue Cui, Song Zhang, Dengjun Lu, Shuangxi Nie","doi":"10.1021/acs.nanolett.5c03791","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03791","url":null,"abstract":"High-strength cellulose materials, endowed with both biocompatibility and lightweight characteristics, are accelerating the advancement of artificial intelligence technologies in wearable electronics. However, the abundance of hydroxyl groups on cellulose surfaces imparts pronounced hydrophilicity, severely constraining the cellulose's wet strength. This study proposes a noncovalent bonding strategy based on hydrogen bonding and electrostatic interactions and develops a Janus-type cellulose triboelectric material with an asymmetric wettability. Benefiting from its low surface wettability and moisture-barrier properties, the material effectively suppresses water-induced damage to the cellulose network. Compared with conventional cellulose materials, the Janus asymmetric-wettability triboelectric material exhibits a 917% enhancement in wet strength. Furthermore, the triboelectric material was integrated into a triboelectric nanogenerator (TENG) and sensors, demonstrating efficient energy harvesting and stress-sensing capabilities. This work offers a perspective for addressing the long-standing challenge of insufficient wet strength in cellulose materials and provides a promising reference for constructing environmentally stable energy harvesting and conversion devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144999217","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 the Origin of Nb-Doped Pt Nanoparticle Electrocatalysts for the Methanol Oxidation Reaction 甲醇氧化反应中铌掺杂Pt纳米粒子电催化剂的来源研究

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-04 DOI: 10.1021/acs.nanolett.5c02842

Fan Zhang, Jinghao Lu, Qinhe Guan, Huixin Zhang, Mang Niu, Weiyong Yuan, Lian Ying Zhang, Xiu Song Zhao

引用次数: 0

In Situ TEM Reveals Direct One-Step Reduction of van der Waals Crystal MoO3 to Mo 原位透射电镜显示范德华晶体MoO3直接一步还原为Mo

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-04 DOI: 10.1021/acs.nanolett.5c03929

Wei Tu, Fan Zhang, Xiankun Song, Lu Jin, An Bai, Zhen Zeng, Tianding Xu, Xianhu Sun, Yao Yang, Jianyu Huang

引用次数: 0

Overcoming the Speed Limit of Four-Way DNA Branch Migration with Bulges in Toeholds 克服具有支点凸起的DNA四向迁移速度限制

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-04 DOI: 10.1021/acs.nanolett.5c03063

Samia Bakhtawar, Francesca Smith, Aditya Sengar, Guy-Bart V. Stan, John Goertz, Molly Stevens, Thomas E. Ouldridge, Wooli Bae

引用次数: 0

Revealing Substitutional Oxygen as the Dominant Defect in Flux-Grown Transition Metal Diselenides. 揭示取代氧是助焊剂生长过渡金属二硒化物的主要缺陷。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-09-03 DOI: 10.1021/acs.nanolett.5c03126

Madisen Holbrook, Luke N Holtzman, Bowen Hou, Luca Nashabeh, Diana Y Qiu, Katayun Barmak, Abhay N Pasupathy, James C Hone

{"title":"Revealing Substitutional Oxygen as the Dominant Defect in Flux-Grown Transition Metal Diselenides.","authors":"Madisen Holbrook, Luke N Holtzman, Bowen Hou, Luca Nashabeh, Diana Y Qiu, Katayun Barmak, Abhay N Pasupathy, James C Hone","doi":"10.1021/acs.nanolett.5c03126","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03126","url":null,"abstract":"Advancing both the fundamental understanding and technological application of two-dimensional semiconducting transition metal dichalcogenides (TMDs) hinges on precise control and identification of atomic-scale defects. Although self-flux growth yields exceptionally pure TMD crystals, the nature of residual defects has remained an open question. Here, we use scanning tunneling microscopy (STM) to directly image and identify point defects in both monolayer and bulk self-flux grown WSe2. We find that the dominant defects reside on chalcogen sites and are unaffected by exfoliation or oxygen exposure. Combining STM observations with first-principles simulations and bulk impurity analysis, we attribute these defects to substitutional oxygen (OSe). This finding goes against the prevailing wisdom that vacancies are the most common defects in exfoliated TMDs. By establishing substitutional oxygen as the dominant defect, our work provides a crucial reference point for interpreting structure-property relationships and informs ongoing efforts to further improve material quality and device performance.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144991049","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 General and Modular Approach to Solid-State Integration of Zero-Dimensional Quantum Systems 零维量子系统固态集成的通用模块化方法

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-03 DOI: 10.1021/acs.nanolett.5c03125

Marzieh Kavand, Zoe Phillips, William H. Koll, Morgan Hamilton, Ethel Perez-Hoyos, Rianna Greer, Ferdous Ara, Daniel Pharis, Kian Maleki, Mingyu Xu, Takashi Taniguchi, Paul Canfield, Michael E. Flatté, Danna E. Freedman, Jay Gupta, Ezekiel Johnston-Halperin

{"title":"A General and Modular Approach to Solid-State Integration of Zero-Dimensional Quantum Systems","authors":"Marzieh Kavand, Zoe Phillips, William H. Koll, Morgan Hamilton, Ethel Perez-Hoyos, Rianna Greer, Ferdous Ara, Daniel Pharis, Kian Maleki, Mingyu Xu, Takashi Taniguchi, Paul Canfield, Michael E. Flatté, Danna E. Freedman, Jay Gupta, Ezekiel Johnston-Halperin","doi":"10.1021/acs.nanolett.5c03125","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03125","url":null,"abstract":"Here, we present an all-electrical readout mechanism for quasi-0D quantum states (0D-QS), such as point defects, adatoms, and molecules, that is modular and general, providing an approach that is amenable to scaling and integration with other solid-state quantum technologies. Our approach relies on the creation of high-quality tunnel junctions via the mechanical exfoliation and stacking of multilayer graphene (MLG) and hexagonal boron nitride (hBN) to encapsulate the target system in an MLG/hBN/0D-QS/hBN/MLG heterostructure. This structure allows for all-electronic spectroscopy and readout of candidate systems through a combination of coulomb and spin-blockade. As a proof of principle, we demonstrate electronic tunneling spectroscopy of point defects in hBN and the molecular qubit vanadyl phthalocyanine. Our approach demonstrates a new pathway for the incorporation of molecules and atomic defects into solid-state quantum devices and circuits along with a readout scheme that does not rely on highly constrained optical processes for photonic readout.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"17 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931384","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 Enhanced Superconductivity in Single-Layer FeSe through Substrate Surface Terminations 通过衬底表面终端揭示单层FeSe的增强超导性

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-03 DOI: 10.1021/acs.nanolett.5c01298

Qiang Zou, Gi-Yeop Kim, Jong-Hoon Kang, Basu Dev Oli, Zhuozhi Ge, Michael Weinert, Subhasish Mandal, Chang-Beom Eom, Si-Young Choi, Lian Li

{"title":"Unraveling Enhanced Superconductivity in Single-Layer FeSe through Substrate Surface Terminations","authors":"Qiang Zou, Gi-Yeop Kim, Jong-Hoon Kang, Basu Dev Oli, Zhuozhi Ge, Michael Weinert, Subhasish Mandal, Chang-Beom Eom, Si-Young Choi, Lian Li","doi":"10.1021/acs.nanolett.5c01298","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01298","url":null,"abstract":"Single-layer FeSe on SrTiO3(001) substrates shows a superconducting transition temperature much higher than that of bulk FeSe, which has been attributed to factors such as electron doping, interfacial electron–phonon coupling, and electron correlations. To pinpoint the primary driver, we grew single-layer FeSe films on SrTiO3(001) substrates with coexisting TiO2 and SrO surface terminations. Scanning tunneling spectroscopy revealed a larger superconducting gap (17.0 meV) on the TiO2-termination than on the SrO-termination (10.5 meV). Tunneling spectroscopy also showed a larger work function on the SrO surface, resulting in reduced charge transfer to FeSe, as confirmed by angle-resolved photoemission spectroscopy. Scanning transmission electron microscopy further revealed distinctive interfacial atomic-scale structures, with the Se–Fe–Se tetrahedral angle changing from 109.5° on the SrO-termination to 104.9° on the TiO2-termination. Compared to dynamical mean field theory calculations, our results indicate that enhanced superconductivity in single-layer FeSe/TiO2 arises from optimal electron correlations, in addition to sufficient charge transfer from the substrate.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"32 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931385","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

How It Started...How It's Going: From Carbon Nanotubes to Complex Fluids and Living Systems. 它是如何开始的……如何进行：从碳纳米管到复杂流体和生命系统。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-09-02 DOI: 10.1021/acs.nanolett.5c04085

Sujit S Datta

引用次数: 0

Self-Powered High-Performance WS2 Photodetector via a Monolithic p–i–n Homojunction 基于单片p-i-n同质结的自供电高性能WS2光电探测器

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-02 DOI: 10.1021/acs.nanolett.5c03066

Jehwan Park, Younghyun You, Donggyu Lee, Jihyun Kim

{"title":"Self-Powered High-Performance WS2 Photodetector via a Monolithic p–i–n Homojunction","authors":"Jehwan Park, Younghyun You, Donggyu Lee, Jihyun Kim","doi":"10.1021/acs.nanolett.5c03066","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03066","url":null,"abstract":"Lateral homojunction photodetectors (PDs) offer high responsivity and fast response, yet challenges in tailoring carrier concentrations in two-dimensional transition-metal dichalcogenides (TMDs) have limited their implementation. Here, we demonstrate a high-performance self-powered monolithic lateral p–i–n homojunction PD using multilayer WS2. To our knowledge, this study is the first report of achieving tunable, multilevel compensation doping via WOX formation using only time-controlled and region-selective ultraviolet (UV)/ozone oxidation. The oxidation process transforms WS2 through distinct phases: initial WOX (2 < X < 3) formation with thickness growth (0–90 min), increased WO3 ratio without thickness change (90–120 min), and self-limited saturation (>120 min). Photocurrent mapping confirms the formation of a lateral p–i–n homojunction, achieving a responsivity of 471 mA/W at 530 nm, a rejection ratio of 200, and response times of ∼4.5 ms under photovoltaic-mode operation. This study enables precise control of free carrier concentrations in TMDs, paving the way to versatile monolithic homojunction optoelectronic devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"13 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144928681","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 Spin-Moiré-Superlattice-Driven Gap Opening in EuAg4Sb2 under in-Plane Magnetic Field 面内磁场下EuAg4Sb2的鲁棒自旋-莫伊尔结-超晶格驱动开隙

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-09-02 DOI: 10.1021/acs.nanolett.5c02167

J. Green, Arpit Arora, Madalynn Marshall, Wanfei Shan, Péter Udvarhelyi, Zachary Morgan, Prineha Narang, Huibo Cao, Ni Ni

{"title":"Robust Spin-Moiré-Superlattice-Driven Gap Opening in EuAg4Sb2 under in-Plane Magnetic Field","authors":"J. Green, Arpit Arora, Madalynn Marshall, Wanfei Shan, Péter Udvarhelyi, Zachary Morgan, Prineha Narang, Huibo Cao, Ni Ni","doi":"10.1021/acs.nanolett.5c02167","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02167","url":null,"abstract":"Moiré superlattices introduce new length and energy scales, enabling discoveries, such as unconventional superconductivity, in 2D systems. This concept has recently been extended to bulk materials with multiple-q spin textures, opening exciting opportunities for spin moiré physics. A notable example is EuAg4Sb2, where a spin moiré superlattice (SMS), manifested as a double-q spin modulation, induces a superzone gap opening. In this work, we investigate the tunability of this gap by an in-plane magnetic field in EuAg4Sb2 by using neutron scattering, magnetization, and transport measurements. We reveal a cycloidal ground state and multiple spin-reoriented phases induced by the in-plane field, highlighting the critical role of in-plane components in driving magnetic transitions. Moreover, we demonstrate that a robust gap opening persists in the double-q phase, regardless of in-plane field orientation. Model calculations attribute this robustness to the stability of the SMS under tilted fields. Our results establish EuAg4Sb2 as a tunable platform for exploring the spin-texture-driven superzone gap opening in electronic states.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"15 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144928682","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