Nano Letters最新文献

Target-Zippable Anisotropic Near-Infrared AuNRs for Highly Reliable and Bright SERS Imaging of miRNA In Vivo

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-25 DOI: 10.1021/acs.nanolett.5c01375

Yutian Lei, Chusheng Liu, Yakun Shi, Ping Li, Yanfei Zhang, Si-Yang Liu, Xing Han, Jiuxin Qu, Jianhe Guo, Zong Dai

{"title":"Target-Zippable Anisotropic Near-Infrared AuNRs for Highly Reliable and Bright SERS Imaging of miRNA In Vivo","authors":"Yutian Lei, Chusheng Liu, Yakun Shi, Ping Li, Yanfei Zhang, Si-Yang Liu, Xing Han, Jiuxin Qu, Jianhe Guo, Zong Dai","doi":"10.1021/acs.nanolett.5c01375","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01375","url":null,"abstract":"Near-infrared surface-enhanced Raman scattering (NIR-SERS) probes are promising for in vivo molecular imaging, but they face challenges in balancing plasmonic activity and signal reproducibility. We designed target-zippable anisotropic NIR gold nanorod (ani-NIR-AuNR) SERS probes, whose end and side regions are decorated with catalytic hairpin assembly (CHA) DNA hairpins and Raman reporters, respectively. These ani-NIR-AuNR monomers maintain a near-zero background until triggered by targets to form uniform side-by-side dimers with an average gap of 0.88 nm, synergistically amplifying electromagnetic enhancement and chemical enhancement. The CHA allows one target to zip numerous dimers, boosting hotspot density. These effects endow the SERS probes with good reproducibility (RSD = 8.56%), superior sensitivity (LOD = 0.15 fM), and a broad linear range (1 fM to 1 nM) for let-7d detection. Compared to fluorescence probes, they offer higher brightness, better spatial resolution, and longer signal persistence in in vivo miRNA imaging, demonstrating substantial potential in bioapplications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"53 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876376","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

Synchronous Regulation of S-Deficient ZnS-MoS2 Heterostructure Nanoreactor for Fast and Durable Sodium Storage

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-25 DOI: 10.1021/acs.nanolett.4c05957

Ying Jiang, Mingyu Lian, Jinlian Ma, Yunsong Long, Xuejing Guo, Yitong Sun, Junchao Lao, Zhengqing Ye

{"title":"Synchronous Regulation of S-Deficient ZnS-MoS2 Heterostructure Nanoreactor for Fast and Durable Sodium Storage","authors":"Ying Jiang, Mingyu Lian, Jinlian Ma, Yunsong Long, Xuejing Guo, Yitong Sun, Junchao Lao, Zhengqing Ye","doi":"10.1021/acs.nanolett.4c05957","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05957","url":null,"abstract":"The enhancement of charge transfer and the relief of volume stress of anode materials contribute to fully exploiting electrochemical performance for sodium ion storage. Herein, a hollow carbon polyhedra nanoreactor adhered with a ZnS-MoS2 heterostructure with tunable sulfur vacancy content (denoted as hp-ZMS-600/700/800) is prepared by self-assembly and a temperature dependent sulfurization procedure. The intimate heterointerface and moderate sulfur vacancies provide fast ion/electron transfer channels, and the hollow nanoreactors afford large volume variation and maintain structural integrity during the sodiation/desodiation process. Theoretical calculations and in situ/ex situ characterization techniques reveal both excellent electron/ion diffusion dynamics and a sodium storage mechanism. As a result, the optimized hp-ZMS-700 anode in sodium-ion batteries delivers a high initial Coulombic efficiency of 96.3%, a high capacity of 398 mAh g–1 at 0.1 A g–1, good rate capability of 119.8 mAh g–1 at 5 A g–1, and an excellent capacity retention of 84.6% after 1000 cycles at 2 A g–1.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"14 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876375","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

Chemical Short-Range Ordering in Nanoprecipitates Modulates Planar Faults to Enhance Mechanical Properties

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-25 DOI: 10.1021/acs.nanolett.5c01602

Qing Zhang, Yixuan Hu, Tao Yang, Han Chen, Yuto Ito, Daisuke Egusa, Eiji Abe, Qiwei Shi, Gang Ji, Yuchi Cui, Xiaodong Wang, Zhe Chen

{"title":"Chemical Short-Range Ordering in Nanoprecipitates Modulates Planar Faults to Enhance Mechanical Properties","authors":"Qing Zhang, Yixuan Hu, Tao Yang, Han Chen, Yuto Ito, Daisuke Egusa, Eiji Abe, Qiwei Shi, Gang Ji, Yuchi Cui, Xiaodong Wang, Zhe Chen","doi":"10.1021/acs.nanolett.5c01602","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01602","url":null,"abstract":"Nanoprecipitates strengthen metallic materials by impeding dislocation motion, but they often compromise ductility. This study introduces a novel strategy to address this challenge by incorporating atomic-scale chemical heterogeneity within nanoprecipitates. For the first time, pronounced short-range ordering (SRO) within L12-ordered precipitates of the Co40Ni30Cr20Al5Ti4Ta1 multi-principal element alloy is observed and confirmed, with its formation mechanism elucidated via density functional theory. Experimental and computational results show that the unique atomic configuration reshapes the energy landscape of planar defects, enhancing the strength and work-hardening capacity. The SRO structure elevates the critical shear stress for dislocation-mediated precipitate shearing while reducing the formation energy of superlattice intrinsic stacking faults, thereby promoting nucleation site formation. This work pioneers a method for modulating atomic-scale heterogeneity within ordered structures, advancing high-performance material design.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"7 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143876379","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

Topology-Dependent Enhancement of Pyroelectric Property in Nanoarchitected GaN Metamaterials

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c01586

Jun Cai, Benyamin Shahryari, Alireza Seyedkanani, Agus P. Sasmito, Abdolhamid Akbarzadeh

{"title":"Topology-Dependent Enhancement of Pyroelectric Property in Nanoarchitected GaN Metamaterials","authors":"Jun Cai, Benyamin Shahryari, Alireza Seyedkanani, Agus P. Sasmito, Abdolhamid Akbarzadeh","doi":"10.1021/acs.nanolett.5c01586","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01586","url":null,"abstract":"Pyroelectric materials exhibit spontaneous polarization in response to temperature fluctuations, a phenomenon known as the pyroelectric effect. This study investigates the pyroelectric properties of nanoarchitected gallium nitride (GaN) metamaterials with distinctive topologies, i.e., body-centered cube, octet truss, gyroid, and spinodoid, using molecular dynamics simulations. Our findings reveal a topology-dependent enhancement in the pyroelectric coefficient, primarily affected by the piezoelectric stress constant and thermal expansion coefficient. We demonstrate that decreasing the relative density further enhances the pyroelectric coefficient due to an increased surface-to-volume ratio that enhances the surface effects. Finally, we compute the pyroelectric figures of merit for thermal energy harvesting application, highlighting the superior pyroelectric performance of nanoarchitected GaN metamaterials compared to bulk GaN and GaN nanowires. These results underscore the potential of nanoscale topology engineering in the field of pyroelectricity for realizing next-generation nanogenerators, thermal imaging devices, and self-powered nanosensors.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872557","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

Gradient Structured Separator Enables Stable Aqueous Zinc Metal Batteries

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c01125

Zehua Zhao, Yan Zhang, Huandi Zhang, Xiaowei Shi, Haitao Zhao, Junpeng Liu, Jiamei Liu, Lei Li

引用次数: 0

In Situ Multiscale Study of Iron Oxidation at High Temperatures

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c00025

Wei Tu, Zhen Zeng, Yongjian Zhao, Zhenghao Jia, Caixia Meng, Wei Liu, Xianhu Sun, Jianyu Huang

{"title":"In Situ Multiscale Study of Iron Oxidation at High Temperatures","authors":"Wei Tu, Zhen Zeng, Yongjian Zhao, Zhenghao Jia, Caixia Meng, Wei Liu, Xianhu Sun, Jianyu Huang","doi":"10.1021/acs.nanolett.5c00025","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00025","url":null,"abstract":"Although high-temperature oxidation of metals results in significant failure of structure materials, in situ understanding of these processes and developing improved strategies are still very limited. Herein, using environmental scanning electron microscopy (ESEM), environmental transmission electron microscopy (ETEM), and X-ray photoelectron spectroscopy (XPS), we report the in situ dynamic high-temperature oxidation behaviors of iron in O2, H2O, and O2 + H2O atmospheres, respectively. The results demonstrate that an oxygen-rich environment (1.6 mbar) leads to transient formation of polycrystalline Fe3O4 without passivation effects on further oxidation, while sparse oxygen environments (10–3 mbar) promote formation of a uniform thin passivation layer of Fe3O4, protecting itself from further oxidation in ambient air. In contrast to O2, the H2O vapor accelerates oxidation, and the products consist of Fe3O4 and FeOOH. These in situ results give insights into designing technically universal antioxidation strategies.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"26 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143867253","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

Highly Sensitive Wearable Chromic Force Sensor Utilizing In-Plane Anisotropy in Polydiacetylene Mechanochromism

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c00085

Jianlu Zheng, Jiali Chen, Massimiliano Galluzzi, Yuge Hou, Kaori Sugihara

引用次数: 0

Collective Electricity Generation over the Kilovolt Level from Water Droplets

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c01064

Wei Deng, Yufeng Zhu, Kelan Zhang, Yuxuan Yuan, Tao Hu, Xiao Wang, Jidong Li, Xuemei Li, Zhuhua Zhang, Wanlin Guo, Jun Yin

引用次数: 0

Keto-Oxygen on Graphitic Surface with Downshifted p-Band Center Achieves Efficient Metal-Free Transfer Hydrogenation of Nitroarenes

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c01614

Rongjian Ding, Ting Zhang, Yanling Zhai, Haijie Cao, Zhijun Zhu, Xiaoquan Lu

{"title":"Keto-Oxygen on Graphitic Surface with Downshifted p-Band Center Achieves Efficient Metal-Free Transfer Hydrogenation of Nitroarenes","authors":"Rongjian Ding, Ting Zhang, Yanling Zhai, Haijie Cao, Zhijun Zhu, Xiaoquan Lu","doi":"10.1021/acs.nanolett.5c01614","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01614","url":null,"abstract":"The critical challenge in utilizing carbon-based nanomaterials is identifying the active site. Herein, we demonstrate the keto-oxygen on the graphitic surface as active sites for catalytic transfer hydrogenation (CTH) and present an efficient nanocrystalline diamond (ND)-derived carbon-based catalyst for metal-free CTH of nitroarenes to imine with 99.9% nitrobenzene conversion and exclusive selectivity (99.9%). By selectively deconstructing the graphitic surface or eliminating carbonyl groups, the graphite-conjugated carbonyl group is confirmed as the catalytically active site. Moreover, kinetic studies display the lower activation barrier of benzylalcohol than that of nitrobenzene (88.8 vs 119.1 kJ mol–1, respectively), indicating that alcohol dehydrogenation occurs prior to the activation of nitrobenzene. Density functional theory calculations reveal the downshifted p-band center of keto-oxygen on the sp2 hybrid C surface affords moderate adsorption of benzaldehyde intermediates, which accelerates the formation of active H for the following hydrogenation step and is responsible for the high catalytic activity.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"7 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872558","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

Interplay of Ultrafast Electron–Phonon and Electron–Electron Scattering in Ti3C2Tx MXenes: Ab Initio Quantum Dynamics

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-24 DOI: 10.1021/acs.nanolett.5c01242

Shiying Shen, Haoran Lu, Shriya Gumber, Oleg V. Prezhdo, Run Long

{"title":"Interplay of Ultrafast Electron–Phonon and Electron–Electron Scattering in Ti3C2Tx MXenes: Ab Initio Quantum Dynamics","authors":"Shiying Shen, Haoran Lu, Shriya Gumber, Oleg V. Prezhdo, Run Long","doi":"10.1021/acs.nanolett.5c01242","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01242","url":null,"abstract":"Nonthermal electrons are vital in solar energy and optoelectronics, yet their relaxation pathways are not fully understood. Ab initio quantum dynamics reveal that in Ti3C2O2 electron–phonon (e-ph) relaxation is faster than electron–electron (e-e) scattering due to strong coupling with the A1g phonon at 190 cm–1 and the presence of light C and O atoms. Nuclear quantum effects are minimal; vibrations influence e-e scattering only indirectly, and the A1g mode’ zero-point energy is much lower than thermal energy at ambient conditions. Substituting O with heavier S in Ti3C2OS slows e-ph relaxation and enhances e-e scattering, making it a faster process. However, both channels proceed concurrently, challenging the e-e and e-ph time scale separation often used for metals. These results underscore the need for atomistic-level understanding of nonthermal electron dynamics, especially in light-element systems such as MXenes, and provide guidance for optimizing electronic relaxation in advanced optoelectronic materials and devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"97 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872721","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