Nano Letters最新文献_第8页

Nanoscale Determination of the Metal-Insulator Transition in Intercalated Bulk VSe₂. 插层体VSe2中金属-绝缘体跃迁的纳米尺度测定。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c02203

Wanru Ma, Ye Yang, Zuowei Liang, Ping Wu, Fanbao Meng, Zhenyu Wang, Xianhui Chen

{"title":"Nanoscale Determination of the Metal-Insulator Transition in Intercalated Bulk VSe2.","authors":"Wanru Ma, Ye Yang, Zuowei Liang, Ping Wu, Fanbao Meng, Zhenyu Wang, Xianhui Chen","doi":"10.1021/acs.nanolett.5c02203","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02203","url":null,"abstract":"Two-dimensional (2D) materials provide unique opportunities to realize emergent phenomena by reducing their dimensionality. Using scanning tunneling microscopy combined with first-principles calculations, we determine an intriguing case of a metal-insulator transition (MIT) in a bulk compound, (TBA)0.3VSe2. Atomic-scale imaging reveals that the initial 4a0 × 4a0 charge density wave (CDW) order in 1T-VSe2 transforms to √7a0 × √3a0 ordering upon intercalation, which is associated with an insulating gap with a magnitude of up to approximately 115 meV. Our calculations reveal that this energy gap is highly tunable through electron doping introduced by the intercalant. Moreover, the robustness of the √7a0 × √3a0 CDW order against the Lifshitz transition points to the key role of electron-phonon interactions in stabilizing the CDW state. Our work clarifies a rare example of a CDW-driven MIT in quasi-2D materials and establishes cation intercalation as an effective pathway for tuning both the dimensionality and the carrier concentration without inducing strain or disorder.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726023","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

Nanoscale Interlayer Engineering Enhances MXene-Based Flexible Pressure Sensor. 纳米层间工程增强基于mxene的柔性压力传感器。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c01464

Yongfa Cheng, Mengjie Wang, Ning Ma, Ruohan Zhang, Zizhen Cai, Mingyang Liu, Zunyu Liu, Shuwen Yan, Jingshu Zhang, Yang Yue, Jianbo Wang, Weijie Liu, Luying Li

{"title":"Nanoscale Interlayer Engineering Enhances MXene-Based Flexible Pressure Sensor.","authors":"Yongfa Cheng, Mengjie Wang, Ning Ma, Ruohan Zhang, Zizhen Cai, Mingyang Liu, Zunyu Liu, Shuwen Yan, Jingshu Zhang, Yang Yue, Jianbo Wang, Weijie Liu, Luying Li","doi":"10.1021/acs.nanolett.5c01464","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01464","url":null,"abstract":"MXene, an emerging two-dimensional nanomaterial, has attracted considerable interest due to its large surface area, excellent mechanical strength, and superior electrical and chemical properties, making it a strong candidate for high-performance pressure sensors. However, its inherent tendency to self-stack limits the tunability of its interlayer structure, which is critical for resistance-based sensing mechanisms. In this work, we successfully achieved continuous tuning of MXene's interlayer spacing, effectively enhancing the sensitivity and overall performance of the pressure sensor. The optimized sensor exhibited outstanding linear sensitivities of 145.5 kPa-1 in the low-pressure range (0-18 kPa) and 25.7 kPa-1 in the medium range (18-50 kPa), along with fast response and recovery times of 68 and 40 ms. Furthermore, it demonstrated excellent durability with stable performance over 10,000 loading/unloading cycles. The sensor was further applied to real-time monitoring of human motions, health signals, and human-machine interactions, highlighting its strong potential in next-generation wearable electronics and smart sensing applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726024","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

Three-Dimensional Crystals Assembled by Linear Oligopeptoids. 由线性寡聚类组装的三维晶体。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c02506

Yen Jea Lee, Peter Ercius, Xubo Luo, Glenn L Butterfoss, Tianyi Yu, Jian Zhang, David Prendergast, Andrew M Minor, Nitash P Balsara, Ronald N Zuckermann, Brooks A Abel, Xi Jiang

{"title":"Three-Dimensional Crystals Assembled by Linear Oligopeptoids.","authors":"Yen Jea Lee, Peter Ercius, Xubo Luo, Glenn L Butterfoss, Tianyi Yu, Jian Zhang, David Prendergast, Andrew M Minor, Nitash P Balsara, Ronald N Zuckermann, Brooks A Abel, Xi Jiang","doi":"10.1021/acs.nanolett.5c02506","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02506","url":null,"abstract":"The rational construction of three-dimensional (3D) crystalline lattices from synthetic short-chain polymers remains a significant challenge due to the lack of inherent driving forces to enable crystal growth in all three dimensions. Here, we report the design of 3D peptoid crystals from linear peptoid hexamers, derived from amphiphilic diblock sequences that typically form crystalline two-dimensional (2D) nanosheets. By removing the amorphous domains and tuning the chain termini, crystalline lamellae up to 500 nm thick were achieved, far exceeding the thickness of typical nanosheets (on the order of a few nanometers). These 3D crystals form via the stacking of unit cells with lattice parameters similar to those in 2D nanosheets, where terminal groups, particularly compact C-terminal moieties, facilitate vertical growth and enhance crystallinity. This study highlights the importance of atomic precision in terminus chemistry for achieving long-range ordering and isotropic crystal growth in the design of macroscale crystals from oligomeric peptoids.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726027","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

Silicon Nanomembrane-Based Synaptic Photodetectors Activated by Phosphorescent Stacks. 磷光堆叠激活的基于硅纳米膜的突触光电探测器。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c02135

Xiaozhong Wu, Haonan Zhao, Zhongying Xue, Yongfeng Mei, Zengfeng Di, Qinglei Guo

{"title":"Silicon Nanomembrane-Based Synaptic Photodetectors Activated by Phosphorescent Stacks.","authors":"Xiaozhong Wu, Haonan Zhao, Zhongying Xue, Yongfeng Mei, Zengfeng Di, Qinglei Guo","doi":"10.1021/acs.nanolett.5c02135","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02135","url":null,"abstract":"Neuromorphic computing that mimics the human brain to realize efficient parallel information processing is considered an important path to break the von Neumann bottleneck. Optoelectronic synaptic devices are of particular interest because of their critical role in the development of neuromorphic computing. This work presents a synaptic photodetector based on the hybrid structure from silicon nanomembranes and a phosphorescent film. The bright and lasting green afterglow of phosphorescent film can be absorbed by the underneath silicon nanomembranes, thus leading to persistent photoconduction. Consequently, synaptic functionalities including excitatory postsynaptic current (EPSC) and paired-pulse facilitation (PPF) are realized via the optical stimulations. Moreover, synaptic short-term and long-term plasticity can be selectively defined within the devices, which are further utilized to simulate age-related cognitive states and memory processes. These results add to the portfolio of optoelectronic synapse options in neuromorphic computing, artificial intelligence, and visual perception systems.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726026","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 Observation of Reaction-Intermediate-Mediated Dynamic Evolution of Step Sites on Au(200) Surface. Au（200）表面台阶位反应中间动态演化的原位观察

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c02364

Tianyu Mao, Wenjuan Yuan, Lin Gu, Yufeng Yang, Jieping Wang, Yongli Shen, Changhua An, Wei Xi

{"title":"In Situ Observation of Reaction-Intermediate-Mediated Dynamic Evolution of Step Sites on Au(200) Surface.","authors":"Tianyu Mao, Wenjuan Yuan, Lin Gu, Yufeng Yang, Jieping Wang, Yongli Shen, Changhua An, Wei Xi","doi":"10.1021/acs.nanolett.5c02364","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02364","url":null,"abstract":"The surface structure of a metal catalyst is key to its catalytic activity and selectivity. Therefore, exploring its evolution during the catalytic reaction is vital. This study investigated the dynamic evolution of step sites on a nanoporous Au(200) surface during methane pyrolysis through in situ gas-phase transmission electron microscopy. The results indicated that the step structure migrated laterally on the surface during methane pyrolysis through a continuous process of disappearance and reconstruction. First-principles calculations revealed that adsorbed carbon species weakened the interactions between the Au atoms and their neighboring Au atoms, promoting their migration and release, which reconstructed the atomic structure of the step edge on the Au(200) surface. This study revealed profound insights into the mechanisms by which reaction intermediates induce the dynamic evolution of catalytic active sites during heterogeneous catalytic reactions. These findings provide a theoretical basis for designing and developing next-generation high-efficiency catalysts.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726018","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

Monolithically Integrated C-Band Quantum Emitters on Foundry Silicon Photonics. 晶圆硅光子学上的单片集成c波段量子发射体。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c01896

Robert M Pettit, Skylar Deckoff-Jones, Angela Donis, Ana Elias, Jayson Briscoe, Gerald Leake, Daniel Coleman, Michael Fanto, Ananthesh Sundaresh, Shobhit Gupta, Manish Kumar Singh, Sean E Sullivan

引用次数: 0

Multiscale Dynamics from Picoseconds to Milliseconds: Bridging Spin Coherence and Metastable Photocharging in CsPbX₃ Perovskite Quantum Dots. 从皮秒到毫秒的多尺度动力学：CsPbX3钙钛矿量子点的桥接自旋相干性和亚稳态光充电。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-28 DOI: 10.1021/acs.nanolett.5c02414

Lin Cheng, Rongrong Hu, Xiaoyang Li, Yumeng Men, Pan Liang, Jinlei Li, Tianqing Jia, Zhenrong Sun, Donghai Feng

{"title":"Multiscale Dynamics from Picoseconds to Milliseconds: Bridging Spin Coherence and Metastable Photocharging in CsPbX3 Perovskite Quantum Dots.","authors":"Lin Cheng, Rongrong Hu, Xiaoyang Li, Yumeng Men, Pan Liang, Jinlei Li, Tianqing Jia, Zhenrong Sun, Donghai Feng","doi":"10.1021/acs.nanolett.5c02414","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02414","url":null,"abstract":"All-inorganic lead halide perovskite quantum dots (PQDs) have attracted significant attention due to their exceptional optoelectronic properties and unique spin-related behaviors. This study investigates the interplay between hole spin coherence and photocharging processes in solution-processed CsPbCl3 PQDs by using time-resolved Faraday rotation spectroscopy. Our research reveals a room-temperature hole spin dephasing time of ∼60 ps and a hole g factor of ∼1.73. Photocharging dynamics are probed via a spin detection technique based on a prepump-pump-probe methodology, uncovering biphasic formation kinetics with time constants of 54 and 327 ps and three lifetimes of 62 μs, 335 μs, and >1 ms for the photocharged states. These multiscale dynamics are similarly observed in CsPbBr3 PQDs. This study provides a quantitative framework linking spin coherence to photocharging processes, deepening the understanding of spin-charge correlations in lead halide perovskites, and offering practical guidelines for optimizing quantum coherence in solution-processed nanomaterials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726021","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

Monolayer-Defined Flat Colloidal PbSe Quantum Dots in Extreme Confinement. 极端约束下单层定义的平面胶体PbSe量子点。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-27 DOI: 10.1021/acs.nanolett.5c02957

Leon Biesterfeld, Huu Thoai Ngo, Ahmed Addad, Dominik A Rudolph, Wolfgang Leis, Michael Seitz, Gang Ji, Bruno Grandidier, Christophe Delerue, Jannika Lauth, Louis Biadala

{"title":"Monolayer-Defined Flat Colloidal PbSe Quantum Dots in Extreme Confinement.","authors":"Leon Biesterfeld, Huu Thoai Ngo, Ahmed Addad, Dominik A Rudolph, Wolfgang Leis, Michael Seitz, Gang Ji, Bruno Grandidier, Christophe Delerue, Jannika Lauth, Louis Biadala","doi":"10.1021/acs.nanolett.5c02957","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c02957","url":null,"abstract":"Colloidal 2D PbX (X = S, Se, Te) nanocrystals are innovative materials pushing the boundaries of quantum confinement by combining crystal thicknesses down to a monolayer with additional confinement in the lateral dimension. These flat PbSe quantum dots (fQDs) exhibit telecommunication band photoluminescence (1.43-0.83 eV), which is highly interesting for fiber optic information processing. With scanning tunneling microscopy/spectroscopy (STM/STS), we probe single-layer-defined fQD populations down to one monolayer, showing an in-gap state free QD-like density of states in excellent agreement with theoretical tight-binding (TB) calculations. Cryogenic ensemble spectra match STS/STM and TB calculations and exhibit the contribution of mono-, bi-, and trilayers to the photoluminescence. Comparing the electronic band gaps with the optical ones, we derive exciton binding energies as high as 600 meV for PbSe monolayers. Our results allow for a target-oriented synthesis of a new class of QDs with record binding energies and precisely tailored optical properties at technologically relevant wavelengths.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726019","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

Multishelled Hollow Spherical High Entropy Oxide as a Separator Modification Layer toward Stable Lithium-Metal Batteries. 多壳中空球形高熵氧化物作为稳定锂金属电池的隔膜改性层。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-27 DOI: 10.1021/acs.nanolett.5c01049

Hui Liu, Bo Jin, Nan Gao, Qing Jiang

引用次数: 0

Exceptional Strengthening via Nanostructure Engineering in Additively Manufactured Aluminum Alloys. 纳米结构工程在增材制造铝合金中的应用。

IF 9.1 1区材料科学

Nano Letters Pub Date : 2025-07-27 DOI: 10.1021/acs.nanolett.5c03206

Yang Liu, Daijun Hu, Mingliang Wang, Kang Wang, Yanan Fu, Shenbao Jin, Bingkun Zou, Yuhan Ju, Wentao Yan, Y Morris Wang, Di Zhang, Zan Li

{"title":"Exceptional Strengthening via Nanostructure Engineering in Additively Manufactured Aluminum Alloys.","authors":"Yang Liu, Daijun Hu, Mingliang Wang, Kang Wang, Yanan Fu, Shenbao Jin, Bingkun Zou, Yuhan Ju, Wentao Yan, Y Morris Wang, Di Zhang, Zan Li","doi":"10.1021/acs.nanolett.5c03206","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c03206","url":null,"abstract":"We report a novel strategy that leverages ceramic microparticles and the thermal cycles of laser powder-bed fusion to achieve ultradense solute nanoclusters in aluminum alloys, resulting in unprecedented tensile properties. Using TiB2 microparticles as an example, we minimize the interfacial energy differences between various crystallographic combinations of aluminum and microparticles through computational design, enabling an equiaxed grain structure. Meanwhile, the thermal misfit between microparticles and matrix induces high-density dislocations. The back-and-forth motion of these dislocations, driven by internal cyclic stresses, spontaneously generates dense vacancies (3.1 × 1023 m-3) in the as-built alloy and facilitates the creation of metastable, ultradense solute clusters (1.7 × 1025 m-3) after direct aging. Hence, remarkable strengthening and strain hardening can be achieved, exhibiting far superior tensile properties compared with additively manufactured counterparts. This study underscores the ability of additive manufacturing to broadly tune alloy nanostructures through a composite strategy and create future high-performance structural materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":" ","pages":""},"PeriodicalIF":9.1,"publicationDate":"2025-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144726016","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