Nano Letters最新文献_第3页

High-Purity Single-Photon Emission in Near-Infrared InAs Colloidal Quantum Dots with Strong Exciton Confinement 强激子约束下近红外InAs胶体量子点的高纯度单光子发射

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-23 DOI: 10.1021/acs.nanolett.5c01546

Yi Yang, Jialu Li, Yaobo Li, Binghan Li, Jiancheng Zhang, Zhihao Chen, Liantuan Xiao, Runchen Lai, Zaiping Zeng, Guofeng Zhang, Botao Ji

{"title":"High-Purity Single-Photon Emission in Near-Infrared InAs Colloidal Quantum Dots with Strong Exciton Confinement","authors":"Yi Yang, Jialu Li, Yaobo Li, Binghan Li, Jiancheng Zhang, Zhihao Chen, Liantuan Xiao, Runchen Lai, Zaiping Zeng, Guofeng Zhang, Botao Ji","doi":"10.1021/acs.nanolett.5c01546","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01546","url":null,"abstract":"Colloidal quantum dots (QDs) are promising solid-state single-photon emitters for quantum information processing due to their facile integration with nanophotonic components and cost-effective production. However, research on near-infrared QDs-based single-photon emitters for telecommunications remains limited. Here, we present bright near-infrared InAs/InP/ZnSe/ZnS QDs that achieve high-purity single-photon emission through strong exciton confinement within the core. Single-QD measurements reveal that this confinement enables ultrafast biexciton Auger recombination, suppressing multiphoton generation and resulting in g(2)(0) values as low as 0.032 at room temperature. Unlike extensively studied Cd-based QDs with quasi-type II band alignment, which suffer from a trade-off between single-photon purity and blinking suppression, our QDs leverage a thick insulating ZnSe shell to minimize photoluminescence blinking by shielding photogenerated excitons from surface interactions without compromising single-photon purity. This study offers a viable strategy for achieving stable, high-purity single-photon emission in near-infrared QDs, highlighting their potential as heavy-metal-free quantum light sources for telecommunications applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"33 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143872765","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

Multifunctional Meta-optic Azimuthal Shear Interferometer 多功能元光学方位剪切干涉仪

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-23 DOI: 10.1021/acs.nanolett.5c00873

Linzhi Yu, Sergei Shevtsov, Haobijam Johnson Singh, Peter G. Kazansky, Humeyra Caglayan

引用次数: 0

Correction to “Electron Compensation Effect Suppressed Silver Ion Release and Contributed Safety of Au@Ag Core–Shell Nanoparticles” 对“电子补偿效应抑制银离子释放，促进Au@Ag核壳纳米粒子安全性”的修正

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-23 DOI: 10.1021/acs.nanolett.5c02049

Yanlin Feng, Guorui Wang, Yun Chang, Yan Cheng, Bingbing Sun, Liming Wang, Chunying Chen, Haiyuan Zhang

引用次数: 0

What Is the Role of a Magnetic Mo Antisite Defect on Carrier Relaxation and Spin Dynamics in 2-D MoS2? 磁性Mo反位缺陷对二维MoS2中载流子弛豫和自旋动力学的作用？

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-23 DOI: 10.1021/acs.nanolett.5c00628

Chengan Lei, Zhao Qian, Yandong Ma, Rajeev Ahuja

引用次数: 0

Low-Temperature Water Evaporation-Mediated Fusion and Densification of Wood for High-Performance and Sustainable Materials 用于高性能和可持续材料的低温水蒸发介导的木材融合和致密化

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.5c00562

Tao Zhang, Liangke Lin, Juya Zhu, Yizhong Cao, Qi Wang, Wentao Huang, Chi Zhang, Xiaoke Zhang, Zhuo Chen, Wenqiang Liu, Pei Yang, Weimin Chen, Minzhi Chen, Huining Xiao, Xiaoyan Zhou

{"title":"Low-Temperature Water Evaporation-Mediated Fusion and Densification of Wood for High-Performance and Sustainable Materials","authors":"Tao Zhang, Liangke Lin, Juya Zhu, Yizhong Cao, Qi Wang, Wentao Huang, Chi Zhang, Xiaoke Zhang, Zhuo Chen, Wenqiang Liu, Pei Yang, Weimin Chen, Minzhi Chen, Huining Xiao, Xiaoyan Zhou","doi":"10.1021/acs.nanolett.5c00562","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00562","url":null,"abstract":"Developing high-performance wood products to replace carbon-intensive structural materials is a key approach to reducing carbon emissions, whereas transforming low-strength wood into high-performance bulk materials through eco-friendly processing techniques is challenging but highly desired. Herein, a facile and sustainable water processing strategy is reported to robustly assemble wood pieces into high-performance bulk materials via delignification, followed by room-temperature water evaporation, eliminating the need for traditional adhesives. As water penetrates and swells the microfibrils, the plasticity of the softened wood is significantly enhanced, thereby facilitating the mutual diffusion of the microfibrils. The strong capillary stresses drive the microfibrils so close that they eventually accomplish molecular-level fusion and densification, which endows self-assembled wood with superior mechanical strength (tensile strength ∼ 535.21 MPa, lap shear strength ∼ 5.02 MPa, and solvent stability). This eco-friendly, water-mediated processing technique paves the way for the development of advanced, sustainable, and high-performance wood products.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"29 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857811","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

Direct cGAMP Delivery via Iron Oxide Nanoparticles for Enhanced STING Activation and Durable Antitumor Immunity 通过氧化铁纳米颗粒直接递送cGAMP增强STING激活和持久抗肿瘤免疫

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.5c01440

Chen Yang, Han Ma, Junli Meng, Jingjiao Li, Haonan Huo, Wei Li, Yuanyuan Zhao, Yixing Wen, Shiwei Mi, Shuai Liu, Xingdi Cheng, Haowei Zu, Simin Sun, Li Ye, Hao Wang, Yayi He, Xueguang Lu, Mingyuan Gao

{"title":"Direct cGAMP Delivery via Iron Oxide Nanoparticles for Enhanced STING Activation and Durable Antitumor Immunity","authors":"Chen Yang, Han Ma, Junli Meng, Jingjiao Li, Haonan Huo, Wei Li, Yuanyuan Zhao, Yixing Wen, Shiwei Mi, Shuai Liu, Xingdi Cheng, Haowei Zu, Simin Sun, Li Ye, Hao Wang, Yayi He, Xueguang Lu, Mingyuan Gao","doi":"10.1021/acs.nanolett.5c01440","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01440","url":null,"abstract":"Activation of the stimulator of interferon genes (STING) pathway holds immense potential for cancer immunotherapy. However, clinical translation of STING agonists such as cyclic GMP-AMP (cGAMP) is hindered by their inherent instability and poor cellular uptake efficacy. Herein, we report an iron oxide nanoparticle (IONP)-based carrier for delivering cGAMP via coordination chemistry. The ribose, phosphate, and adenine on cGAMP were leveraged to directly bind IONP, resulting in cGAMP-functionalized IONPs (Fe-cGAMP). Such a design greatly improved the cellular uptake and STING activation efficacy of cGAMP. Beyond delivery, IONPs promoted reactive oxygen species (ROS) production and activated Toll-like receptors, leading to synergistic immune activation alongside cGAMP. Fe-cGAMP exhibited robust antitumor effects in multiple mouse tumor models. In combination with immune checkpoint inhibitors, Fe-cGAMP could induce complete tumor remission in over 50% of treated mice, and these mice also remain tumor-free upon a subsequent challenge, demonstrating strong and long-lasting antitumor immune responses.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"7 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862601","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 Excited-State Dynamics of Er3+ in LiErF4-Based Upconversion Nanoparticles 基于lierf4的上转换纳米颗粒中Er3+的激发态动力学研究

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.5c00884

Shuo Zhang, Xiaoke Hu, Ping Huang, Xiaoying Shang, Dengfeng Yang, Zhiqing Shao, Xiaoyue Wang, Wei Zheng, Xueyuan Chen

{"title":"Unraveling the Excited-State Dynamics of Er3+ in LiErF4-Based Upconversion Nanoparticles","authors":"Shuo Zhang, Xiaoke Hu, Ping Huang, Xiaoying Shang, Dengfeng Yang, Zhiqing Shao, Xiaoyue Wang, Wei Zheng, Xueyuan Chen","doi":"10.1021/acs.nanolett.5c00884","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00884","url":null,"abstract":"Lanthanide (Ln3+)-enriched upconversion nanoparticles (UCNPs) with high dopant concentrations have garnered significant attention due to their unique optical properties. However, their practical applications are hindered by the deleterious concentration quenching effect. Herein, through kinetic modeling of Er3+ excited-state dynamics employing energy diffusion theories, we demonstrate that concentration quenching in LiErF4 UCNPs predominantly originates from long-range energy migration through the 4I13/2 level toward surface and lattice defects, rather than the conventionally attributed cross-relaxation mechanism. Such migration-mediated energy dissipation can be effectively suppressed by the synergistic engineering strategies combining surface passivation, spatial confinement via a sandwiched LiYF4@LiErF4@LiYF4 core–shell–shell architecture to restrict Er3+ migration, and incorporation of Tm3+ as energy trapping centers, boosting upconversion quantum yield from <0.01% to 2.29% (980 nm@70 W cm–2). The established mechanistic framework and material design principles provide critical insights for engineering heavily doped UCNPs, particularly advancing their application potential in single-particle spectroscopy and optoelectronic nanodevices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"6 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862610","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

Electrical Control of Polariton Josephson Junctions via Exciton Stark Effect 通过激子斯塔克效应实现极化子约瑟夫森结的电气控制

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.5c00442

Hua Wang, Hong-Yi Xie, Kieran Mullen

引用次数: 0

Digital Detection of DNA via Impedimetric Tracking of Probe Nanoparticles 利用探针纳米颗粒的阻抗跟踪技术实现DNA的数字化检测

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.4c05324

Mohammad Saghafi, Suryasnata Tripathy, Taghi Moazzenzade, Jurriaan Huskens, Serge G. Lemay

{"title":"Digital Detection of DNA via Impedimetric Tracking of Probe Nanoparticles","authors":"Mohammad Saghafi, Suryasnata Tripathy, Taghi Moazzenzade, Jurriaan Huskens, Serge G. Lemay","doi":"10.1021/acs.nanolett.4c05324","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05324","url":null,"abstract":"CMOS-based nanocapacitor arrays are an emerging technology that permits spatially resolved, high-frequency impedance measurements at the nanoscale. Their capability to detect micro- and nanoscale entities has already been established through nonspecific interactions with the targets. Here, we demonstrate their application in specific macromolecular capture and detection using single-stranded DNA (ssDNA) as a model analyte. While individual ssDNA strands fall below the detection threshold, we employ a strand displacement assay that links DNA hybridization to target ssDNA induced displacement of reporter nanoparticles. This displacement reaction results in distinct electrical signatures with complex spatiotemporal patterns, details that remain unresolved in conventional macroscale impedance spectroscopy techniques due to their limited resolution and signal averaging that obscures localized interactions. The proposed system’s massively parallel architecture and the ability to detect complex dynamics of individual nanoparticle–nanoelectrode interactions make it a promising candidate for scalable, portable, and cost-effective biosensing applications in clinical diagnostics and beyond.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"35 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862599","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-Photon-Harvesting Nanophotofertilizers for Plant Growth Multiregulation 用于植物多调控生长的高光子收获纳米光肥

IF 10.8 1区材料科学

Nano Letters Pub Date : 2025-04-22 DOI: 10.1021/acs.nanolett.5c01785

Yujie Cui, Qiang Wang, Yaru Huang, Hang Shangguan, Shuang Liu, Chunsheng Li, Zhongyuan Liu, Xiuhua Zhao, Yujie Fu, Jiating Xu

{"title":"High-Photon-Harvesting Nanophotofertilizers for Plant Growth Multiregulation","authors":"Yujie Cui, Qiang Wang, Yaru Huang, Hang Shangguan, Shuang Liu, Chunsheng Li, Zhongyuan Liu, Xiuhua Zhao, Yujie Fu, Jiating Xu","doi":"10.1021/acs.nanolett.5c01785","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01785","url":null,"abstract":"Nanophotoresponsive technology has emerged as a promising way to enhance plant photosynthesis, but it faces limitations in light absorption and electron transfer efficiency. This study presents a photoresponsive nanosystem, LDNPs@Fe,Cu-CDs, combining lanthanide-doped nanoparticles (LDNPs) and Fe/Cu dual single-atom-doped carbon dots (CDs). Fabricated via hydrothermal synthesis, the nanosystem can regulate plant growth through light absorption, photothermal effects, photoelectron generation, and photocatalysis. Using a simple surface spraying method, the LDNPs@Fe,Cu-CDs can be absorbed by leaves and transported into N. benthamiana. LDNPs@Fe,Cu-CDs can harvest both near-infrared and ultraviolet light for photosynthesis and promote electron transfer in the photosynthetic chain by 33.2%. The nanosystem increased chlorophyll levels by 28.4% and enhanced photosynthesis by 67.5%. Additionally, it can alleviate the limitations of reactive oxygen species and cold environments, improving plant growth. The wet and dry weight of N. benthamiana were increased by 57.7% and 50.5%, respectively. LDNPs@Fe,Cu-CDs show great potential as a “nanophotofertilizer” for agricultural applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"13 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143862600","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