Nano Letters最新文献_第10页

Persistent Chemiluminescence-Enabled Digital Bead Counting for Quantifying Attomolar MicroRNAs

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c0083810.1021/acs.nanolett.5c00838

Chao Lei, Wenjiao Fan, Jingjing Shi, Zhaowei Tian, Xinrui Duan* and Chenghui Liu*,

{"title":"Persistent Chemiluminescence-Enabled Digital Bead Counting for Quantifying Attomolar MicroRNAs","authors":"Chao Lei, Wenjiao Fan, Jingjing Shi, Zhaowei Tian, Xinrui Duan* and Chenghui Liu*, ","doi":"10.1021/acs.nanolett.5c0083810.1021/acs.nanolett.5c00838","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00838https://doi.org/10.1021/acs.nanolett.5c00838","url":null,"abstract":"Digital biosensing is the state-of-the-art technique for precisely quantifying low-abundance biomarkers but heavily limited to sophisticated fabrication of sealed microchambers and fluorescence signal readout. Herein, a novel persistent, enhanced-chemiluminescence (E-CL)-enabled microchamber-free digital counting strategy is proposed for miRNA analysis by using fully open microbeads (MBs) as independent microreactors and signaling units. The employment of a phenothiazine derivative enhancer efficiently transfers the flash-type CL of horseradish peroxidase (HRP)-H2O2-luminol into persistent and stable E-CL with more than 103-fold signal enhancement. More importantly, by leveraging single miRNA molecule-activated deposition of HRP, the driving power of E-CL, on the miRNA-loaded MBs, the long-lasting E-CL can be finely sustained on the MBs’ surface, achieving CL-based binary MB counting for digital miRNA quantification at the aM level. This persistent E-CL-powered microchamber-free digital design may well complement prevalent fluorescence-based digital bioassays by effectively addressing their inherent drawbacks (photobleaching/quenching and scattering light background), thus expanding the digital biosensing toolbox.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5469–5476 5469–5476"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745965","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 Solvent-Induced Solid Polymer Electrolyte with Controllable Polymerization for Low-Temperature Lithium Metal Batteries

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c0647110.1021/acs.nanolett.4c06471

Shuai Liu, Bing Wu, Xiang Bai, Jiahui Zhang, Xinyue Chang, Lifeng Hou, Hao Huang, Yinghui Wei, Shi Wang*, Zhong Jin* and Qian Wang*,

{"title":"A Solvent-Induced Solid Polymer Electrolyte with Controllable Polymerization for Low-Temperature Lithium Metal Batteries","authors":"Shuai Liu, Bing Wu, Xiang Bai, Jiahui Zhang, Xinyue Chang, Lifeng Hou, Hao Huang, Yinghui Wei, Shi Wang*, Zhong Jin* and Qian Wang*, ","doi":"10.1021/acs.nanolett.4c0647110.1021/acs.nanolett.4c06471","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06471https://doi.org/10.1021/acs.nanolett.4c06471","url":null,"abstract":"Solid-state electrolytes based on in situ ring-opening polymerization of 1,3-dioxolane (DOL) have attracted widespread attention in Li metal batteries because of their high interface compatibility. However, its conventional cationic polymerization mechanism frequently results in the formation of long polymer chains during in situ polymerization, thereby impeding Li+ transport. Here, we regulate the ring opening polymerization of DOL by introducing N,N-dimethyltrifluoroacetamide (FDMA), thus avoiding the formation of long polymer chains. Meanwhile, FDMA can derive a stable SEI rich in LiF during electrochemical cycling, improving interface stability and suppressing dendritic Li growth. Therefore, the full battery with LiFePO4 as the cathode can achieve a high capacity retention rate of 83.9% after 400 cycles at a rate of 5.0 C. At −20 °C, the Li∥LiFePO4 full battery can provide a high capacity of 137 mAh g–1. The solvent-induced strategy provides a promising new avenue for designing a solid electrolyte with high temperature resistance.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5241–5249 5241–5249"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745915","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

Stretchable, Rechargeable, Multimodal Hybrid Electronics for Decoupled Sensing toward Emotion Detection

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c0639210.1021/acs.nanolett.4c06392

Yangbo Yuan, Hongcheng Xu, Libo Gao* and Huanyu Cheng*,

{"title":"Stretchable, Rechargeable, Multimodal Hybrid Electronics for Decoupled Sensing toward Emotion Detection","authors":"Yangbo Yuan, Hongcheng Xu, Libo Gao* and Huanyu Cheng*, ","doi":"10.1021/acs.nanolett.4c0639210.1021/acs.nanolett.4c06392","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06392https://doi.org/10.1021/acs.nanolett.4c06392","url":null,"abstract":"Despite the rapid development of stretchable electronic devices for various applications in biomedicine and healthcare, the coupling between multiple input signals remains an obstacle in multimodal sensing before use in practical environments. This work introduces a fully integrated stretchable, rechargeable, multimodal hybrid device that combines decoupled sensors with a flexible wireless powering and transmitting module for emotion recognition. Through optimized structural design and material selection, the sensors can provide continuous real-time decoupled monitoring of biaxial strain, temperature, humidity, heart rate, and SpO2 levels. With a stacked bilayer for both the sensors and the flexible circuit, the rechargeable system showcases a reduced device footprint and improved comfort. A neural network model is also demonstrated to allow for high-precision facial expression recognition. By transmitting the real-time measured data to mobile devices and the cloud, the system can allow healthcare professionals to evaluate psychological health and provide emotional support through telemedicine when needed.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5220–5230 5220–5230"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745959","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

Efficient Planar Heterojunction Organic Solar Cell with Enhanced Crystallization and Diffusivity of Acceptor

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c0575010.1021/acs.nanolett.4c05750

Xiang Wu, Honghui Wu, Yufei Wang*, Wenxuan Wu, Jianbin Zhong, Wei Zhang, Xiaozhi Zhan, Xunchang Wang, Renqiang Yang, Tao Zhu, Jian Qing and Wanzhu Cai*,

{"title":"Efficient Planar Heterojunction Organic Solar Cell with Enhanced Crystallization and Diffusivity of Acceptor","authors":"Xiang Wu, Honghui Wu, Yufei Wang*, Wenxuan Wu, Jianbin Zhong, Wei Zhang, Xiaozhi Zhan, Xunchang Wang, Renqiang Yang, Tao Zhu, Jian Qing and Wanzhu Cai*, ","doi":"10.1021/acs.nanolett.4c0575010.1021/acs.nanolett.4c05750","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05750https://doi.org/10.1021/acs.nanolett.4c05750","url":null,"abstract":"In the field of organic solar cells (OSCs), planar heterojunctions (PHJs) have received less attention. This study demonstrates that enhancing the crystallization and diffusivity of nonfullerene small-molecule acceptors (NF-SMAs) through sequential deposition significantly optimizes the morphology of PHJ OSCs, driving notable performance enhancements. An additive 1,2,4,5-tetrabromobenzene (TBrB) is employed during sequential deposition, enabling such desirable morphological control in OSCs. In situ UV–vis absorption spectroscopy reveals that TBrB selectively induces rapid aggregation of NF-SMAs, L8-BO, within subseconds. Structural analysis confirms that TBrB promotes the formation of a 3D “honeycomb” structure of L8-BO. Simultaneously, TBrB enhances L8-BO diffusivity into the D18 layer, resulting in a widened and well-intermixed region. These morphological optimizations improve the charge transfer efficiency and reduce bimolecular recombination, achieving a peak power conversion efficiency (PCE) of 19.25%. This study underscores the critical role of fine-tuning solidification processes in sequential deposition to optimize the morphology and performance of OSCs.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5132–5139 5132–5139"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746131","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

Bandwidth of Lightwave-Driven Electronic Response from Metallic Nanoantennas

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c06536

Matthew Yeung, Lu-Ting Chou, Felix Ritzkowsky, Marco Turchetti, Karl K. Berggren, Shih-Hsuan Chia, Phillip D. Keathley

{"title":"Bandwidth of Lightwave-Driven Electronic Response from Metallic Nanoantennas","authors":"Matthew Yeung, Lu-Ting Chou, Felix Ritzkowsky, Marco Turchetti, Karl K. Berggren, Shih-Hsuan Chia, Phillip D. Keathley","doi":"10.1021/acs.nanolett.4c06536","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06536","url":null,"abstract":"Lightwave electronics offer transformative field-level precision and control at high optical frequencies. While recent advances show that lightwave-driven electron emission from nanoantennas enables time-domain, field-resolved analysis of optical waveforms through a small-signal analysis, the effect of the gate waveform on the measurement transfer function remains unexplored. By generating electrons with a 10-cycle pulse in the optical tunneling regime and perturbing the response with a 1.5-cycle pulse, we experimentally measure the bandwidth limitations imposed by the electron emission process. By comparing these measurements with TDSE simulations and analytical models, we reveal the temporal properties of the electronic response and its impact on the small-signal transfer function. Our results test and confirm the accuracy of the Fowler–Nordheim model in estimating the lightwave electronic response from noble metals. We envision extending these techniques to multi-octave-spanning signals for precise characterization of sub-cycle electronic responses through harmonic frequency mixing.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"96 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695555","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

Unlocking the Potential of Aqueous Zinc-Ion Batteries: Hybrid SEI Construction through Bifunctional Regulator-Assisted Electrolyte Engineering

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c00533

Shi Wang, Junjie Li, Binze Yang, Bo Zhang, Zihan Zhang, Shoubin Zhou, Qian Wang, Jing Ma, Zhong Jin

{"title":"Unlocking the Potential of Aqueous Zinc-Ion Batteries: Hybrid SEI Construction through Bifunctional Regulator-Assisted Electrolyte Engineering","authors":"Shi Wang, Junjie Li, Binze Yang, Bo Zhang, Zihan Zhang, Shoubin Zhou, Qian Wang, Jing Ma, Zhong Jin","doi":"10.1021/acs.nanolett.5c00533","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00533","url":null,"abstract":"Aqueous zinc-ion batteries (AZIBs) represent promising candidates for energy storage devices, because of their inherent high safety and cost efficiency. However, challenges such as uneven zinc ion deposition during electrochemical reduction and anode interface side reactions pose significant obstacles to their advancement and practical deployment. Herein, a medium-concentration aqueous electrolyte combined with a bifunctional regulator (aspartame) is developed to address these issues. Practical validation experiments and theoretical calculations demonstrate that the medium-concentration Zn(OTf)2 aqueous electrolyte containing Aspartame can form a robust hybrid solid electrolyte interface (SEI) containing ZnF2 and ZnS by simultaneously modulating the Zn2+ solvation structure and optimizing the metal-molecule interface, thereby enabling dense Zn deposition. It achieves dendrite-free Zn plating and stripping and excellent Zn reversibility. Significantly, the Zn||V2O5 full cell exhibits an average capacity of 240 mAh g–1 over 8000 cycles at 5 A g–1. This work provides new insight into solvation and interface design for high-performance AZIBs.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"93 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143695556","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

Polarized Polymer Rectangles Featuring Long-Range Ordered π-Conjugation for Anisotropic Responses to Light and Tensile Vectors

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c0142210.1021/acs.nanolett.5c01422

Tae Kyung Won, Sang Yup Lee, Seung Hyuk Back, Chunzhi Cui* and Dong June Ahn*,

{"title":"Polarized Polymer Rectangles Featuring Long-Range Ordered π-Conjugation for Anisotropic Responses to Light and Tensile Vectors","authors":"Tae Kyung Won, Sang Yup Lee, Seung Hyuk Back, Chunzhi Cui* and Dong June Ahn*, ","doi":"10.1021/acs.nanolett.5c0142210.1021/acs.nanolett.5c01422","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01422https://doi.org/10.1021/acs.nanolett.5c01422","url":null,"abstract":"Micrometer-scale polarized polymeric rectangles with nanometer-scale thicknesses were fabricated through the simple reprecipitation of selected diacetylenic surfactants, exhibiting anisotropic responses to directional external fields. These 2D rectangular plates feature linearly conjugated poly(diacetylene) backbones aligned along their shorter side over large domains, enabling unique angle-dependent polarization of visible light and fluorescent emission. The conformity to Malus’s law confirms the reliability of the linear polarization demonstrated by these plates. In addition to optical anisotropy, these polymer rectangles exhibit an orientation-dependent mechanical response. When tensile force is applied parallel to the shorter side or polymer backbone, the plates undergo a distinct visual color transition; however, little to no change occurs when the force is applied perpendicularly. Such an anisotropic response behavior of 2D rectangular plates is further validated by molecular dynamics simulations. This work provides a strategic framework for materials chemistry design that enables optical reflection of orientation-dependent external fields.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5529–5538 5529–5538"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745962","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-Efficiency Dry-Jet Wet Spinning of Ultratoughness Regenerated Wool Keratin Fibers

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.4c0518110.1021/acs.nanolett.4c05181

Yalin Dong, Jinlin Yu, Xian Wen, Zhaoyang Sun, Yikun Duan, Liming Wang* and Xiaohong Qin*,

{"title":"High-Efficiency Dry-Jet Wet Spinning of Ultratoughness Regenerated Wool Keratin Fibers","authors":"Yalin Dong, Jinlin Yu, Xian Wen, Zhaoyang Sun, Yikun Duan, Liming Wang* and Xiaohong Qin*, ","doi":"10.1021/acs.nanolett.4c0518110.1021/acs.nanolett.4c05181","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05181https://doi.org/10.1021/acs.nanolett.4c05181","url":null,"abstract":"Regenerated wool keratin fibers (RWKFs) featuring their ecofriendliness, ample resources, and intrinsic biocompatibility have attracted significant interest, while their high-value-added applications are still severely limited by inadequate mechanical properties and complex fabrication processes. Herein, a straightforward dry-jet wet spinning technique without post-treatment processes is proposed to prepare ultratoughness RWKFs. The as-spun fibers achieve a macroscale hierarchical structure due to the preorientation of nanoscale α-keratin protofibrils in air-gap drawing of dry-jet wet spinning, while α-keratins are preserved in large quantities because of no additional post-treatment stretching. As a result, the fabricated RWKFs achieve a tensile strength of ∼142.7 MPa, an outstanding elongation of ∼171.7%, and a record high toughness of ∼176.3 MJ m–3, outperforming natural wool and previously reported regenerated keratin fibers. Moreover, the reported RWKFs’ dyeability, moisture-induced shape-memory capacity, and electric generation performance remarkably expand their applications in textiles or even smart apparel.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5078–5086 5078–5086"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143746121","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

Nanosized Membrane Fusion-Triggered Three-Dimensional DNA Walker for Subtype-Specific Analysis of Breast Cancer Extracellular Vesicles

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-24 DOI: 10.1021/acs.nanolett.5c0122110.1021/acs.nanolett.5c01221

Zhikai Fang, Ayong Cao, Zichen Huang, Xi Jin, Zhan Zhang, Ya Cao*, Jing Zhao* and Xiaolei Zuo*,

{"title":"Nanosized Membrane Fusion-Triggered Three-Dimensional DNA Walker for Subtype-Specific Analysis of Breast Cancer Extracellular Vesicles","authors":"Zhikai Fang, Ayong Cao, Zichen Huang, Xi Jin, Zhan Zhang, Ya Cao*, Jing Zhao* and Xiaolei Zuo*, ","doi":"10.1021/acs.nanolett.5c0122110.1021/acs.nanolett.5c01221","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01221https://doi.org/10.1021/acs.nanolett.5c01221","url":null,"abstract":"Extracellular vesicles (EVs) are highly attractive in cancer diagnosis, owing to their ability to reflect the molecular characteristics of the source cells. Herein, we engineer a DNA-equipped liposome nanoprobe for developing a nanosized membrane fusion-triggered three-dimensional (3D) DNA walker for the analysis of breast cancer EVs. Specifically, liposome nanoprobes efficiently fuse with target EVs by recognizing surface-expressed epidermal growth factor receptors, thereby creating 3D tracks for the DNA walker. Subsequently, walking probes targeting human epidermal growth factor receptor-2 (HER-2) were recruited onto the fused vesicles to manipulate the walker, eventually generating considerable electrochemical signals. Results reveal a good linearity between the electrochemical output and the target EV concentration and also prove the ability of the membrane fusion-triggered DNA walker to differentiate HER-2-positive breast cancer patients and monitor the disease progression. Taken together, this work presents an effective approach for the early and subtype-specific diagnosis of breast cancer.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5512–5519 5512–5519"},"PeriodicalIF":9.6,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745966","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

Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals

IF 9.6 1区材料科学

Nano Letters Pub Date : 2025-03-23 DOI: 10.1021/acs.nanolett.5c0103210.1021/acs.nanolett.5c01032

Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan and Xu-Sheng Yang*,

{"title":"Maintaining Grain Boundary Segregation-Induced Strengthening Effect in Extremely Fine Nanograined Metals","authors":"Lei Qian, Jiacheng Zhang, Wenqing Yang, Yunjiang Wang, Kangcheung Chan and Xu-Sheng Yang*, ","doi":"10.1021/acs.nanolett.5c0103210.1021/acs.nanolett.5c01032","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01032https://doi.org/10.1021/acs.nanolett.5c01032","url":null,"abstract":"Reinforcing grain boundaries through solute segregation is a promising strategy to strengthen nanograined metals. However, maintaining strengthening in extremely fine nanograined metals poses challenges due to grain size reduction and grain boundary structural changes from excessive segregation. This study employs hybrid Monte Carlo/Molecular Dynamics simulations to investigate the interplay between solute concentration, grain boundary structure, deformation mechanism, and strength in Zr-segregated nanograined Cu. Results exhibit significant strength enhancement by optimizing segregation, extending the strengthening effect to a grain size as small as 3.75 nm. Continuous Zr segregation induces a progressive transition from original grain boundaries to segregated and ultimately amorphous grain boundaries. Amorphization alters the dominant deformation mechanism from grain boundary migration to homogeneous shear-transformation-zone activation, fostering and optimizing the strengthening effect in extremely fine nanograined Cu. These findings inspire a novel approach of segregation-induced grain boundary amorphization to leverage strong boundaries and extremely fine nanograins for strengthening nanograined metals.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"25 13","pages":"5493–5501 5493–5501"},"PeriodicalIF":9.6,"publicationDate":"2025-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.5c01032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0