Nano Letters最新文献_第10页

In Situ Transmission Electron Microscopy Investigation on Oriented Attachment of Nanodiamonds 纳米金刚石定向附着的原位透射电子显微镜研究。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-09 DOI: 10.1021/acs.nanolett.3c03300

Yuting Shen, Shi Su, Tao Xu, Kuibo Yin, Kaishuai Yang* and Litao Sun*,

引用次数: 0

Submillimeter-Long WS2 Nanotubes: The Pathway to Inorganic Buckypaper 亚毫米长的WS2纳米管：通往无机Buckypaper的途径。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-08 DOI: 10.1021/acs.nanolett.3c02783

Vojtěch Kundrát, Rita Rosentsveig, Kristýna Bukvišová, Daniel Citterberg, Miroslav Kolíbal, Shachar Keren, Iddo Pinkas, Omer Yaffe, Alla Zak and Reshef Tenne*,

{"title":"Submillimeter-Long WS2 Nanotubes: The Pathway to Inorganic Buckypaper","authors":"Vojtěch Kundrát, Rita Rosentsveig, Kristýna Bukvišová, Daniel Citterberg, Miroslav Kolíbal, Shachar Keren, Iddo Pinkas, Omer Yaffe, Alla Zak and Reshef Tenne*, ","doi":"10.1021/acs.nanolett.3c02783","DOIUrl":"10.1021/acs.nanolett.3c02783","url":null,"abstract":"WS2 nanotubes present many new technologies under development, including reinforced biocompatible polymers, membranes, photovoltaic-based memories, ferroelectric devices, etc. These technologies depend on the aspect ratio (length/diameter) of the nanotubes, which was limited to 100 or so. A new synthetic technique is presented, resulting in WS2 nanotubes a few hundred micrometers long and diameters below 50 nm (aspect ratios of 2000–5000) in high yields. Preliminary investigation into the mechanistic aspects of the two-step synthesis reveals that W5O14 nanowhisker intermediates are formed in the first step of the reaction instead of the ubiquitous W18O49 nanowhiskers used in the previous syntheses. The electrical and photoluminescence properties of the long nanotubes were studied. WS2 nanotube-based paper-like material was prepared via a wet-laying process, which could not be realized with the 10 μm long WS2 nanotubes. Ultrafiltration of gold nanoparticles using the nanotube-paper membrane was demonstrated.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 22","pages":"10259–10266"},"PeriodicalIF":10.8,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.3c02783","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41090799","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

Probing the Atomistic Reaction Pathways in CuO/C Catalysts CuO/C催化剂原子反应途径的探索。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-08 DOI: 10.1021/acs.nanolett.3c02651

Jie Hu, He Zheng*, Lei Li, Guoxujia Chen, Kaixuan Li, Meng Qi, Ying Zhang, Peili Zhao, Weiwei Meng, Shuangfeng Jia and Jianbo Wang*,

{"title":"Probing the Atomistic Reaction Pathways in CuO/C Catalysts","authors":"Jie Hu, He Zheng*, Lei Li, Guoxujia Chen, Kaixuan Li, Meng Qi, Ying Zhang, Peili Zhao, Weiwei Meng, Shuangfeng Jia and Jianbo Wang*, ","doi":"10.1021/acs.nanolett.3c02651","DOIUrl":"10.1021/acs.nanolett.3c02651","url":null,"abstract":"CuOx/C catalysts have been used in the selective catalytic reduction of NOx because of the exceptional low-temperature denitration (de-NOx) activity. A fundamental understanding of the reaction between CuO and C is critical for controlling the component of CuOx/C and thus optimizing the catalytic performance. In this study, a transmission electron microscope equipped with an in situ heating device was utilized to investigate the atomic-scale reaction between CuO and C. We report two reaction mechanisms relying on the volume ratio between C and CuO: (1) The reduction from CuO to Cu2O (when the ratio is < ∼31%); (2) the reduction of CuO into polycrystalline Cu (when the ratio is > ∼34%). The atomistic reduction pathway can be well interpreted by considering the diffusion of O vacancy through the first-principle calculations. The atomic-scale exploration of CuO/C offers ample prospects for the design of industrial de-NOx catalysts in the future.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 20","pages":"9367–9374"},"PeriodicalIF":10.8,"publicationDate":"2023-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41089829","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

Spatial Tuning of Light–Matter Interaction via Strain-Gradient-Induced Polarization in Freestanding Wrinkled 2D Materials 独立褶皱2D材料中通过应变梯度诱导偏振的光-物质相互作用的空间调谐。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-05 DOI: 10.1021/acs.nanolett.3c02550

Chullhee Cho, Zhichao Zhang, Jin Myung Kim, Peiwen J. Ma, Md Farhadul Haque, Peter Snapp and SungWoo Nam*,

{"title":"Spatial Tuning of Light–Matter Interaction via Strain-Gradient-Induced Polarization in Freestanding Wrinkled 2D Materials","authors":"Chullhee Cho, Zhichao Zhang, Jin Myung Kim, Peiwen J. Ma, Md Farhadul Haque, Peter Snapp and SungWoo Nam*, ","doi":"10.1021/acs.nanolett.3c02550","DOIUrl":"10.1021/acs.nanolett.3c02550","url":null,"abstract":"To date, controlled deformation of two-dimensional (2D) materials has been extensively demonstrated with substrate-supported structures. However, interfacial effects arising from these supporting materials may suppress or alter the unique behavior of the deformed 2D materials. To address interfacial effects, we report, for the first time, the formation of a micrometer-scale freestanding wrinkled structure of 2D material without any encapsulation layers where we observed the enhanced light–matter interactions with a spatial modulation. Freestanding wrinkled monolayer WSe2 exhibited about a 330% enhancement relative to supported wrinkled WSe2 quantified through photoinduced force microscopy. Spatial modulation and enhancement of light interaction in the freestanding wrinkled structures are attributed to the enhanced strain-gradient effect (i.e., out-of-plane polarization) enabled by removing the constraining support and proximate dielectrics. Our findings offer an additional degree of freedom to modulate the out-of-plane polarization and enhance the out-of-plane light–matter interaction in 2D materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 20","pages":"9340–9346"},"PeriodicalIF":10.8,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.3c02550","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41089900","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

Hyper-Branched Gold Nanoconstructs for Photoacoustic Imaging in the Near-Infrared Optical Window 用于近红外光学窗口光声成像的超支化金纳米结构。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-05 DOI: 10.1021/acs.nanolett.3c02177

Myeongsoo Kim, Don VanderLaan, Jeungyoon Lee, Ayoung Choe, Kelsey P. Kubelick, Jinhwan Kim* and Stanislav Y. Emelianov*,

{"title":"Hyper-Branched Gold Nanoconstructs for Photoacoustic Imaging in the Near-Infrared Optical Window","authors":"Myeongsoo Kim, Don VanderLaan, Jeungyoon Lee, Ayoung Choe, Kelsey P. Kubelick, Jinhwan Kim* and Stanislav Y. Emelianov*, ","doi":"10.1021/acs.nanolett.3c02177","DOIUrl":"10.1021/acs.nanolett.3c02177","url":null,"abstract":"In plasmonic nanoconstructs (NCs), fine-tuning interparticle interactions at the subnanoscale offer enhanced electromagnetic and thermal responses in the near-infrared (NIR) wavelength range. Due to tunable electromagnetic and thermal characteristics, NCs can be excellent photoacoustic (PA) imaging contrast agents. However, engineering plasmonic NCs that maximize light absorption efficiency across multiple polarization directions, i.e., exhibiting blackbody absorption behavior, remains challenging. Herein, we present the synthesis, computational simulation, and characterization of hyper-branched gold nanoconstructs (HBGNCs) as a highly efficient PA contrast agent. HBGNCs exhibit remarkable optical properties, including strong NIR absorption, high absorption efficiency across various polarization angles, and superior photostability compared to conventional standard plasmonic NC-based contrast agents such as gold nanorods and gold nanostars. In vitro and in vivo experiments confirm the suitability of HBGNCs for cancer imaging, showcasing their potential as reliable PA contrast agents and addressing the need for enhanced imaging contrast and stability in bioimaging applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 20","pages":"9257–9265"},"PeriodicalIF":10.8,"publicationDate":"2023-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.3c02177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41090358","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

Viscoelastic Multiscale Mechanical Indexes for Assessing Liver Fibrosis and Treatment Outcomes 评估肝纤维化和治疗结果的粘弹性多尺度力学指标。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-04 DOI: 10.1021/acs.nanolett.3c03341

Zhuo Chang, Liqiang Zhang, Jiu-Tao Hang, Wenjia Liu* and Guang-Kui Xu*,

{"title":"Viscoelastic Multiscale Mechanical Indexes for Assessing Liver Fibrosis and Treatment Outcomes","authors":"Zhuo Chang, Liqiang Zhang, Jiu-Tao Hang, Wenjia Liu* and Guang-Kui Xu*, ","doi":"10.1021/acs.nanolett.3c03341","DOIUrl":"10.1021/acs.nanolett.3c03341","url":null,"abstract":"Understanding liver tissue mechanics, particularly in the context of liver pathologies like fibrosis, cirrhosis, and carcinoma, holds pivotal significance for assessing disease severity and prognosis. Although the static mechanical properties of livers have been gradually studied, the intricacies of their dynamic mechanics remain enigmatic. Here, we characterize the dynamic creep responses of healthy, fibrotic, and mesenchymal stem cells (MSCs)-treated fibrotic lives. Strikingly, we unearth a ubiquitous two-stage power-law rheology of livers across different time scales with the exponents and their distribution profiles highly correlated to liver status. Moreover, our self-similar hierarchical theory effectively captures the delicate changes in the dynamical mechanics of livers. Notably, the viscoelastic multiscale mechanical indexes (i.e., power-law exponents and elastic stiffnesses of different hierarchies) and their distribution characteristics prominently vary with liver fibrosis and MSCs therapy. This study unveils the viscoelastic characteristics of livers and underscores the potential of proposed mechanical criteria for assessing disease evolution and prognosis.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 20","pages":"9618–9625"},"PeriodicalIF":10.8,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acs.nanolett.3c03341","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41089836","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

Nanoscopic Observation of Chiro-Optical Force Chiro光学力的纳米观测。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-04 DOI: 10.1021/acs.nanolett.3c02534

Junsuke Yamanishi*, Hyo-Yong Ahn and Hiromi Okamoto*,

引用次数: 0

Quartz Nonadherent and Clean Exfoliation of the Heteroatom-Doped Bulk Carbon Nanotubes Array 掺杂原子大块碳纳米管阵列的石英非粘附和清洁剥落。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-04 DOI: 10.1021/acs.nanolett.3c02702

Lejian Yu, Yaqi Hou, Yilan Wang, Pei Cao, Chunyi Luo, Yu Liu, Guang Ran, Miao Wang* and Xu Hou*,

{"title":"Quartz Nonadherent and Clean Exfoliation of the Heteroatom-Doped Bulk Carbon Nanotubes Array","authors":"Lejian Yu, Yaqi Hou, Yilan Wang, Pei Cao, Chunyi Luo, Yu Liu, Guang Ran, Miao Wang* and Xu Hou*, ","doi":"10.1021/acs.nanolett.3c02702","DOIUrl":"10.1021/acs.nanolett.3c02702","url":null,"abstract":"Vertically aligned carbon nanotubes array offers unique properties for various applications. Detaching them from the growth substrate, while preserving their vertical structure, is essential. Quartz, a cost-effective alternative to silicon wafers and metal-based substrates, can serve as both a reaction chamber and a growth substrate. However, the strong adhesive interaction with the quartz substrate remains an obstacle for further applications. Herein, we presented a simple and well-controlled exfoliation strategy assisted by the introduction of heteroatoms at root ends of a carbon nanotubes array. This strategy forms lower surface polarity of the carbon fragment to significantly reduce adhesion to the quartz substrate, which contributes to the effortless exfoliation. Furthermore, this scalable approach enables potential mass production on recyclable quartz substrates, enhancing the cost-effectiveness and efficiency. This work can establish a solid foundation for cost-competitive carbon nanotube-based technologies, offering a promising avenue for their widespread applications.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"23 20","pages":"9383–9391"},"PeriodicalIF":10.8,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41090416","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

Correction to “Nonlocal Optical Response of Particle Plasmons in Single Gold Nanorods” 对“单个金纳米棒中粒子等离子体的非局部光学响应”的修正。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-03 DOI: 10.1021/acs.nanolett.3c03648

Weixiang Ye*,

引用次数: 0

Methyl-Branched Liposomes as a Depot for Sustained Drug Delivery 甲基支化脂质体作为持续给药的仓库。

IF 10.8 1区材料科学

Nano Letters Pub Date : 2023-10-03 DOI: 10.1021/acs.nanolett.3c02137

Yang Li, Rachelle Shao, Claire A. Ostertag-Hill, Matthew Torre, Ran Yan and Daniel S. Kohane*,

引用次数: 0