Nano Letters最新文献_第4页

Multiple Strategies to Build High-Performance Spherical Na-Ion Layered Oxide Cathodes 构建高性能球形 Na 离子层状氧化物阴极的多种策略

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-13 DOI: 10.1021/acs.nanolett.4c02644

Xiangnan Li, Xinyu Tang, Mengdan Zhang, Ming Ge, Xiaojian Liu, Yuantao Cui, Yiwei Xu, Huishuang Zhang, Yanhong Yin, Shu-Ting Yang

引用次数: 0

Harnessing Physical Entropy Noise in Structurally Metastable 1T' Molybdenum Ditelluride for True Random Number Generation. 利用结构稳定的 1T'二碲化钼中的物理熵噪声生成真正的随机数。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2024-11-13 Epub Date: 2024-11-01 DOI: 10.1021/acs.nanolett.4c03957

Yang Liu, Pengyu Liu, Yingyi Wen, Zihan Liang, Songwei Liu, Lekai Song, Jingfang Pei, Xiaoyue Fan, Teng Ma, Gang Wang, Shuo Gao, Kong-Pang Pun, Xiaolong Chen, Guohua Hu

{"title":"Harnessing Physical Entropy Noise in Structurally Metastable 1T' Molybdenum Ditelluride for True Random Number Generation.","authors":"Yang Liu, Pengyu Liu, Yingyi Wen, Zihan Liang, Songwei Liu, Lekai Song, Jingfang Pei, Xiaoyue Fan, Teng Ma, Gang Wang, Shuo Gao, Kong-Pang Pun, Xiaolong Chen, Guohua Hu","doi":"10.1021/acs.nanolett.4c03957","DOIUrl":"10.1021/acs.nanolett.4c03957","url":null,"abstract":"True random numbers are crucial for various research and engineering problems. Their generation depends upon a robust physical entropy noise. Here, we present true random number generation from the conductance noise probed in structurally metastable 1T' molybdenum ditelluride (MoTe2). The noise, fitting a Poisson process, is proved to be a robust physical entropy noise at low and even cryogenic temperatures. Noise characteristic analyses suggest the noise may originate from the polarization variations of the underlying ferroelectric dipoles in 1T' MoTe2. We demonstrate the noise allows for true random number generation, and this facilitates their use as the seed for generating high-throughput secure random numbers exceeding 1 Mbit/s, appealing for practical applications in, for instance, cryptography where data security is now critical. As an example, we show biometric information safeguarding in neural networks by using the random numbers as the mask, proving a promising data security measure in big data and artificial intelligence.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142562393","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

On-Chip Terahertz Spectroscopy for Dual-Gated van der Waals Heterostructures at Cryogenic Temperatures 低温条件下双门控范德瓦耳斯异质结构的片上太赫兹光谱学

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-13 DOI: 10.1021/acs.nanolett.4c04137

Junseok Seo, Zhengguang Lu, Seunghyun Park, Jixiang Yang, Fangzhou Xia, Shenyong Ye, Yuxuan Yao, Tonghang Han, Lihan Shi, Kenji Watanabe, Takashi Taniguchi, Amir Yacoby, Long Ju

{"title":"On-Chip Terahertz Spectroscopy for Dual-Gated van der Waals Heterostructures at Cryogenic Temperatures","authors":"Junseok Seo, Zhengguang Lu, Seunghyun Park, Jixiang Yang, Fangzhou Xia, Shenyong Ye, Yuxuan Yao, Tonghang Han, Lihan Shi, Kenji Watanabe, Takashi Taniguchi, Amir Yacoby, Long Ju","doi":"10.1021/acs.nanolett.4c04137","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04137","url":null,"abstract":"Van der Waals heterostructures have emerged as a versatile platform to study correlated and topological electron physics. Spectroscopy experiments in the THz regime are crucial since the energy of THz photons matches that of relevant excitations and charge dynamics. However, their micrometer size and complex (dual-)gated structures have challenged such measurements. Here, we demonstrate on-chip THz spectroscopy on a dual-gated bilayer graphene device at liquid helium temperature. To avoid unwanted THz absorption by metallic gates, we developed a scheme of operation by combining semiconducting gates and optically controlled gating. This allows us to measure the clean THz response of graphene without being affected by the gates. We observed the THz signatures of electric-field-induced bandgap opening at the charge neutrality. We measured Drude conductivities at varied charge densities and extracted key parameters including effective masses and scattering rates. This work paves the way for studying novel emergent phenomena in dual-gated two-dimensional materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142601566","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

Fabrication of Novel Porous Nano-pesticides by Modifying MPN onto Cu-TCPP MOFs to Enhance Bactericidal Efficacy and Modulate Its Bioavailability. 通过在 Cu-TCPP MOFs 上对 MPN 进行改性来制造新型多孔纳米杀虫剂，以增强杀菌效力并调节其生物利用度。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2024-11-13 Epub Date: 2024-10-29 DOI: 10.1021/acs.nanolett.4c04277

Jiatong Han, Guangyang Liu, Yushan Hou, Ailing Zhou, Jie Zhou, Ge Chen, Honghao Lv, Yaowei Zhang, Jun Lv, Jing Chen, Xiaomin Xu, Donghui Xu

{"title":"Fabrication of Novel Porous Nano-pesticides by Modifying MPN onto Cu-TCPP MOFs to Enhance Bactericidal Efficacy and Modulate Its Bioavailability.","authors":"Jiatong Han, Guangyang Liu, Yushan Hou, Ailing Zhou, Jie Zhou, Ge Chen, Honghao Lv, Yaowei Zhang, Jun Lv, Jing Chen, Xiaomin Xu, Donghui Xu","doi":"10.1021/acs.nanolett.4c04277","DOIUrl":"10.1021/acs.nanolett.4c04277","url":null,"abstract":"Nano-pesticides have attracted much attention in the field of agriculture, due to existing problems such as decreased bactericidal effect and poor adhesion. An environmentally friendly metal porphyrin (Cu-TCPP)-based nanocarrier pesticide release of diniconazole (DIN) was designed to enhance bactericidal efficacy and modulate its bioavailability in a multidimensional manner by constructing a metal phenolic network (MPN) encapsulation. The introduction of the MPN prevents the DIN from prematurely escaping from the Cu-TCPP@DIN@MPN in the environment and gives it strong interfacial adhesion to resist rain washing. The resulting Cu-TCPP@DIN@MPN nanoparticles (NPs) showed a lamellar stacked embedded structure, which improved the inhibition of Fusarium oxysporum (90.9%) and photostability (67.2%), while they do not affect healthy plant growth and meet the relevant food safety requirements for DIN residues. This work provides new ideas for the development of superior photostable, adhesive, rainwater erosion-resistant, and sustainable nanocarrier pesticides.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142520259","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-Resolution Spectroscopy of the Intermediate Impurity States near a Quantum Phase Transition. 量子相变附近中间杂质态的高分辨率光谱。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2024-11-13 Epub Date: 2024-11-01 DOI: 10.1021/acs.nanolett.4c03376

Yao Zhang, Ruijing Sun, Tao Xie, Zhen-Yu Liu, Rui Wang, Wenhao Zhang, Chaofei Liu, Ying-Shuang Fu

引用次数: 0

Deep Learning Enhanced in Situ Atomic Imaging of Ion Migration at Crystalline-Amorphous Interfaces. 晶体-非晶体界面离子迁移的深度学习增强型原位原子成像。

IF 9.6 1区材料科学

Nano Letters Pub Date : 2024-11-13 Epub Date: 2024-11-04 DOI: 10.1021/acs.nanolett.4c04472

Weikang Dong, Yi-Chi Wang, Chen Yang, Chunhao Sun, Hesong Li, Ze Hua, Ziqi Wu, Xiaoxue Chang, Lixia Bao, Shuangquan Qu, Xintao Zuo, Wen Yang, Jing Lu, Ying Fu, Jiafang Li, Lixin Dong, Ruiwen Shao

{"title":"Deep Learning Enhanced in Situ Atomic Imaging of Ion Migration at Crystalline-Amorphous Interfaces.","authors":"Weikang Dong, Yi-Chi Wang, Chen Yang, Chunhao Sun, Hesong Li, Ze Hua, Ziqi Wu, Xiaoxue Chang, Lixia Bao, Shuangquan Qu, Xintao Zuo, Wen Yang, Jing Lu, Ying Fu, Jiafang Li, Lixin Dong, Ruiwen Shao","doi":"10.1021/acs.nanolett.4c04472","DOIUrl":"10.1021/acs.nanolett.4c04472","url":null,"abstract":"Improving the performance of energy storage, neuromorphic computing, and more applications requires an in-depth understanding of ion transport at interfaces, which are often hindered by facile atomic reconfiguration at working conditions and limited characterization capability. Here, we construct an in situ double-tilt electric manipulator inside an aberration-corrected scanning transmission electron microscope. Coupled with deep learning-based image enhancement, atomic images are enhanced 3-fold compared to traditional methods to observe the potassium ion migration and microstructure evolution at the crystalline-amorphous interface in antimony selenide. Potassium ions form stable anisotropic insertion sites outside the (Sb4Se6) chain, with a few potassium ions present within the moieties. Combined experiments and density functional theory calculations reveal a reaction pathway of forming a novel metastable state during potassium ion insertion, followed by recovery and unexpected chirality changes at the interface upon potassium ion extraction. Our unique methodology paves the way for facilitating the improvement and rational design of nanostructured materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":9.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142566414","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

Nanosilver-Enhanced Far-Field Fluorescence Fluctuations for Super-Resolution Microscopy 用于超分辨率显微镜的纳米银增强型远场荧光波动技术

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-12 DOI: 10.1021/acs.nanolett.4c05155

Guangyong Qin, Xin Guan, Jian Mao, Zhenzhen Feng, Wenxuan Yang, Shenming Wang, Zheng Zhen, Xintong Miao, Yifeng Cheng, Zhirui Wang, Xiaojuan Wang, Fang Huang, Hua He

{"title":"Nanosilver-Enhanced Far-Field Fluorescence Fluctuations for Super-Resolution Microscopy","authors":"Guangyong Qin, Xin Guan, Jian Mao, Zhenzhen Feng, Wenxuan Yang, Shenming Wang, Zheng Zhen, Xintong Miao, Yifeng Cheng, Zhirui Wang, Xiaojuan Wang, Fang Huang, Hua He","doi":"10.1021/acs.nanolett.4c05155","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c05155","url":null,"abstract":"Fluctuation-based super-resolution microscopy enhances image resolution using signal fluctuations, yet the inherent fluctuations of fluorophores limit its spatiotemporal resolution. In this work, we reveal a far-field enhancement (FFE) effect via a nanosilver film that significantly boosts fluorescence fluctuations of fluorophores positioned up to 10 μm away. The FFE effect arises from the interference of scattered light from the nanosilver film and photothermal-induced refractive index changes in the imaging medium, which create periodic auxiliary illumination on the sample. This phenomenon enabled the development of far-field enhanced super-resolution microscopy (FFE-SRM), a technique compatible with commonly used fluorophores. FFE-SRM improves temporal resolution up to 10-fold and enhances spatial resolution by about 2-fold over various SRM methods, including stochastic optical fluctuation imaging, super-resolution radial fluctuation, mean-shift super-resolution, and direct stochastic optical reconstruction microscopy. We demonstrated the potential of FFE-SRM by revealing mitochondrial dynamics in live-cell imaging, advancing super-resolution imaging, and cellular process exploration.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599679","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

Dye-to-Er3+ Direct Energy Transfer for Enhancing Up- and Down-conversion Luminescence in Sub-10 nm NaErF4 染料-Er3+ 直接能量转移用于增强 10 纳米以下 NaErF4 的上转换和下转换发光能力

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-12 DOI: 10.1021/acs.nanolett.4c04539

Fei Zhao, Huan Ling, Wenrui Zhang, Yunxiang Zhang, Qian Liu

{"title":"Dye-to-Er3+ Direct Energy Transfer for Enhancing Up- and Down-conversion Luminescence in Sub-10 nm NaErF4","authors":"Fei Zhao, Huan Ling, Wenrui Zhang, Yunxiang Zhang, Qian Liu","doi":"10.1021/acs.nanolett.4c04539","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04539","url":null,"abstract":"Dye sensitization enhances the luminescence of lanthanide nanoparticles by improving light-harvesting. Typically, Yb3+ serves as an energy bridge but absorbs at a single transition, limiting dyes’ options (λex > 700 nm) due to the spectral overlap requirement. In contrast, the emitter Er3+ spans energy levels from UV to NIR, making it ideal for multicolor excitation. We developed a strategy to directly sensitize Er3+ upconversion (UCL) and downconversion luminescence (DCL) by using cyanine dyes. Cy5 demonstrated the greatest enhancement, achieving a 1942-fold UCL and 70-fold DCL increase compared to nanoparticles alone (Er-NPs) under 980 nm excitation. Smaller Er-NPs exhibited brighter dye-sensitized luminescence due to enhanced interfacial energy transfer. A 2 nm inert shell produced the brightest UCL, while thicker shells improved DCL. Dye-sensitized Er3+ emissions at 2H11/2 (525 nm) and 2P3/2 (408 nm) enabled temperature monitoring with a maximum sensitivity (Sa) of 3.69%/K. This approach holds significant potential for optical temperature sensing and medical imaging.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599678","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

Predicting and Accelerating Nanomaterial Synthesis Using Machine Learning Featurization 利用机器学习功能化预测和加速纳米材料合成

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-12 DOI: 10.1021/acs.nanolett.4c04500

Christopher C. Price, Yansong Li, Guanyu Zhou, Rehan Younas, Spencer S. Zeng, Tim H. Scanlon, Jason M. Munro, Christopher L. Hinkle

{"title":"Predicting and Accelerating Nanomaterial Synthesis Using Machine Learning Featurization","authors":"Christopher C. Price, Yansong Li, Guanyu Zhou, Rehan Younas, Spencer S. Zeng, Tim H. Scanlon, Jason M. Munro, Christopher L. Hinkle","doi":"10.1021/acs.nanolett.4c04500","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04500","url":null,"abstract":"Materials synthesis optimization is constrained by serial feedback processes that rely on manual tools and intuition across multiple siloed modes of characterization. We automate and generalize feature extraction of reflection high-energy electron diffraction (RHEED) data with machine learning to establish quantitatively predictive relationships in small sets (∼10) of expert-labeled data, saving significant time on subsequently grown samples. These predictive relationships are evaluated in a representative material system (W1–xVxSe2 on c-plane sapphire (0001)) with two aims: 1) predicting grain alignment of the deposited film using pregrowth substrate data and 2) estimating vanadium dopant concentration using in situ RHEED as a proxy for ex situ methods (e.g., X-ray photoelectron spectroscopy). Both tasks are accomplished using the same materials-agnostic features, avoiding specific system retraining and leading to a potential 80% time saving over a 100-sample synthesis campaign. These predictions provide guidance to avoid doomed trials, reduce follow-on characterization, and improve control resolution for materials synthesis.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599043","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

Pump-Wavelength Selective All-Optical Terahertz Metasurface with Independent Amplitude and Frequency Modulations 具有独立振幅和频率调制的泵浦波长选择性全光学太赫兹元表面

IF 10.8 1区材料科学

Nano Letters Pub Date : 2024-11-12 DOI: 10.1021/acs.nanolett.4c04741

Jing Yuan, Zhengang Lu, Guichuan Xu, Heyan Wang, Lin Han, Jiubin Tan

{"title":"Pump-Wavelength Selective All-Optical Terahertz Metasurface with Independent Amplitude and Frequency Modulations","authors":"Jing Yuan, Zhengang Lu, Guichuan Xu, Heyan Wang, Lin Han, Jiubin Tan","doi":"10.1021/acs.nanolett.4c04741","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c04741","url":null,"abstract":"Tunable terahertz (THz) metasurfaces based on optical control are crucial in high-speed communication, nondestructive testing, and imaging. However, realizing independent optical tunability of multiple functions in the THz band remains challenging due to limitations in control materials. Here, we experimentally demonstrate a novel THz metasurface that employs two control materials combined with an electric-field-coupled inductor capacitor microstructure to achieve all-optical independent modulations of amplitude and frequency. Amplitude modulation is achieved through near-infrared optical pumping, reaching a maximum modulation depth of 94.42%. Broadband frequency modulation, spanning 0.21 THz, is accomplished using visible light pumping. The independent modulation function is owing to the odd-order nonlinear polarization characteristics of perovskite and the selective photon transition between the bottom Si island and the perovskite film. This work introduces a novel approach for all-optical independent modulation of THz devices, offering valuable insights for developing all-optical metasurfaces, intelligent light windows, and multidimensional ultrafast switches.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":null,"pages":null},"PeriodicalIF":10.8,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142599681","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