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.
{"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}
Pub Date : 2025-04-22DOI: 10.1021/acs.nanolett.5c00442
Hua Wang, Hong-Yi Xie, Kieran Mullen
We propose harnessing the tools of modern nanofabrication to provide electrical control of exciton–polariton (EP) condensates. We develop the theory of a device based on the Josephson effect in which electric fields can be used to both switch between and monitor various dynamical modes. In particular, both the bias potential and the Josephson energy can be tuned electrically via the exciton component. We model the device by a Gross–Pitaevskii equation assuming that ideal EP condensates are established with well-balanced pumping and dissipation. We find that the EP condensates can be manipulated through degrees of freedom not easily accessible in other coherent quantum systems, and the dynamics of EP Josephson junctions are richer than that of the conventional superconducting junctions. The ability to control and monitor the condensate by both optical and electrical means allows new ways to study its physics not possible by either, alone.
{"title":"Electrical Control of Polariton Josephson Junctions via Exciton Stark Effect","authors":"Hua Wang, Hong-Yi Xie, Kieran Mullen","doi":"10.1021/acs.nanolett.5c00442","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00442","url":null,"abstract":"We propose harnessing the tools of modern nanofabrication to provide electrical control of exciton–polariton (EP) condensates. We develop the theory of a device based on the Josephson effect in which electric fields can be used to both switch between and monitor various dynamical modes. In particular, both the bias potential and the Josephson energy can be tuned electrically via the exciton component. We model the device by a Gross–Pitaevskii equation assuming that ideal EP condensates are established with well-balanced pumping and dissipation. We find that the EP condensates can be manipulated through degrees of freedom not easily accessible in other coherent quantum systems, and the dynamics of EP Josephson junctions are richer than that of the conventional superconducting junctions. The ability to control and monitor the condensate by both optical and electrical means allows new ways to study its physics not possible by either, alone.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"27 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857804","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}
Stationary electrochemical energy storage calls for low-cost and high-safety next-generation chemistries, among which the Na-NiCl2 battery based on the displacement reaction stands out but is threatened by the fragile β″-Al2O3 membrane. Here we present a class of low-lost, medium-temperature (150 °C), membrane-less aluminum displacement batteries (ADBs) based on a reversible solid-to-solid displacement reaction between transition metals (TM; Fe, Co, Ni) and their chlorides (TMCs) in alkali chloroaluminate molten salts. Crucially, manipulation of the Lewis acidity of the chloroaluminate molten salt electrolyte enables membrane-less operation of the cell by restricting solubility of the TMC and its crosstalk with the Al negative electrode. The structured Ni cathode exhibits a high capacity of 380 mA h g–1, low overpotential of ∼50 mV at the rate of 0.2 A g–1, and high stability over 500 cycles. Furthermore, we demonstrate a membrane-less Al–Fe displacement battery that promises an ultralow-cost avenue for stationary energy storage.
{"title":"Membrane-less Aluminum Displacement Batteries Based on Transition Metal Chlorination in Molten Salts","authors":"Jiashen Meng, Yu Wang, Zhitong Xiao, Lujun Zhu, Xufeng Hong, Yongfeng Jia, Fang Liu, Linhan Xu, Quanquan Pang","doi":"10.1021/acs.nanolett.5c00503","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00503","url":null,"abstract":"Stationary electrochemical energy storage calls for low-cost and high-safety next-generation chemistries, among which the Na-NiCl<sub>2</sub> battery based on the displacement reaction stands out but is threatened by the fragile β″-Al<sub>2</sub>O<sub>3</sub> membrane. Here we present a class of low-lost, medium-temperature (150 °C), membrane-less aluminum displacement batteries (ADBs) based on a reversible solid-to-solid displacement reaction between transition metals (TM; Fe, Co, Ni) and their chlorides (TMCs) in alkali chloroaluminate molten salts. Crucially, manipulation of the Lewis acidity of the chloroaluminate molten salt electrolyte enables membrane-less operation of the cell by restricting solubility of the TMC and its crosstalk with the Al negative electrode. The structured Ni cathode exhibits a high capacity of 380 mA h g<sup>–1</sup>, low overpotential of ∼50 mV at the rate of 0.2 A g<sup>–1</sup>, and high stability over 500 cycles. Furthermore, we demonstrate a membrane-less Al–Fe displacement battery that promises an ultralow-cost avenue for stationary energy storage.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"43 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143858033","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}
Pub Date : 2025-04-21DOI: 10.1021/acs.nanolett.5c00741
Yanqiu Ye, Guohui Huang, Wei Zhang, Jiasheng Wu, Jianhao Wu, Yingxin Li, Xiaoxia Zhou, Jianbo Jia, Zengchun Xie, Bing Yan, Kenneth A. Dawson, Jingqi Chen, Yi-Feng Wang, Yan Yan
A new integrated tunable microfluidic particle synthesis and shape population analysis workflow allows us to study the immunological readouts for even highly complex shaped nanoparticles. Using this approach, we demonstrate that some gold nanoparticles, when injected parenterally, are taken up by axillary and brachial lymph nodes. We then show that specific nanoparticle shapes influence the primary structure of the T cell receptor, inducing changes in hypervariable complementary-determining regions (CDRs) and increasing the clonal diversity of the T cell receptor repertoires. These same particles were previously found to modify cellular epigenomes and elevate the level of autoantibodies. Our results are consistent with other emerging reports that precisely controlled nanoarchitectural features are recognized and captured in multiple tiers of biology, with potential implications for vaccine adjuvant design. Our conclusions may also be relevant to an extensive legacy of poorly understood epidemiological studies, suggesting links between some pollutant particulates and complex forms of immune dysregulation and autoimmune diseases.
{"title":"Integrated Methodology from Synthesis to in Vivo Study that Identifies Nanostructure Shape “Hot Spots” in T Cell Receptor Repertoire","authors":"Yanqiu Ye, Guohui Huang, Wei Zhang, Jiasheng Wu, Jianhao Wu, Yingxin Li, Xiaoxia Zhou, Jianbo Jia, Zengchun Xie, Bing Yan, Kenneth A. Dawson, Jingqi Chen, Yi-Feng Wang, Yan Yan","doi":"10.1021/acs.nanolett.5c00741","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00741","url":null,"abstract":"A new integrated tunable microfluidic particle synthesis and shape population analysis workflow allows us to study the immunological readouts for even highly complex shaped nanoparticles. Using this approach, we demonstrate that some gold nanoparticles, when injected parenterally, are taken up by axillary and brachial lymph nodes. We then show that specific nanoparticle shapes influence the primary structure of the T cell receptor, inducing changes in hypervariable complementary-determining regions (CDRs) and increasing the clonal diversity of the T cell receptor repertoires. These same particles were previously found to modify cellular epigenomes and elevate the level of autoantibodies. Our results are consistent with other emerging reports that precisely controlled nanoarchitectural features are recognized and captured in multiple tiers of biology, with potential implications for vaccine adjuvant design. Our conclusions may also be relevant to an extensive legacy of poorly understood epidemiological studies, suggesting links between some pollutant particulates and complex forms of immune dysregulation and autoimmune diseases.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"1 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857808","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}
The seed-mediated growth involving cetyltrimethylammonium chloride (CTAC), silver trifluoroacetate (CF3COOAg), ascorbic acid (H2Asc), and Ag seeds covered by poly(vinylpyrrolidone) (PVP) in aqueous medium is a robust route to Ag nanocubes with tunable sizes. However, mechanistic details such as changes to the surface remain elusive. Herein, we address this issue by leveraging the high sensitivity and water compatibility of surface-enhanced Raman scattering (SERS). Our results reveal that the addition of CTAC results in ligand exchange between PVP and chloride and the further introduction of CF3COOAg leads to the deposition of AgCl on Ag seeds. The H2Asc subsequently introduced increases the electron density on the surface of the seeds due to electron transfer, as manifested by rapid and pronounced enhancement of the SERS signals from AgCl and CTA+. The electrons from H2Asc also enable reduction to directly transform AgCl in contact with Ag into Ag atoms and enlarge the seeds into nanocubes.
{"title":"Seeing Is Believing: How Does the Surface of Silver Nanocubes Change during Their Growth in an Aqueous System","authors":"Qijia Huang, Dong Zhang, Hansong Yu, Yong Ding, Younan Xia","doi":"10.1021/acs.nanolett.5c01276","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01276","url":null,"abstract":"The seed-mediated growth involving cetyltrimethylammonium chloride (CTAC), silver trifluoroacetate (CF<sub>3</sub>COOAg), ascorbic acid (H<sub>2</sub>Asc), and Ag seeds covered by poly(vinylpyrrolidone) (PVP) in aqueous medium is a robust route to Ag nanocubes with tunable sizes. However, mechanistic details such as changes to the surface remain elusive. Herein, we address this issue by leveraging the high sensitivity and water compatibility of surface-enhanced Raman scattering (SERS). Our results reveal that the addition of CTAC results in ligand exchange between PVP and chloride and the further introduction of CF<sub>3</sub>COOAg leads to the deposition of AgCl on Ag seeds. The H<sub>2</sub>Asc subsequently introduced increases the electron density on the surface of the seeds due to electron transfer, as manifested by rapid and pronounced enhancement of the SERS signals from AgCl and CTA<sup>+</sup>. The electrons from H<sub>2</sub>Asc also enable reduction to directly transform AgCl in contact with Ag into Ag atoms and enlarge the seeds into nanocubes.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"119 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853549","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}
Uncontrollable dendrite growth can jeopardize the cycle life of aqueous Zn batteries. Here, we propose a general strategy of engineering artificial protrusions (APs) on the electrode surface to regulate the distribution of the electrode interface electric field and induce stable Zn plating/stripping for Zn batteries. The junction-free AP-Cu network is constructed on Cu foil by an ultrafast Joule-heating-welding method. COMSOL simulation reveals that a stronger microelectric field is formed around the individual AP, which can effectively regulate a uniform nucleation of Zn on the AP-Cu network. Guided by the structural advantages of the AP design, the AP-Cu∥Zn cell delivers an average Coulombic efficiency (CE) of 99.85% at 2 C with an areal capacity of 1.77 mAh cm–2 for over 3000 cycles. Moreover, the AP design enables stable cycling of both Zn|AP-Cu∥V2O5 and anode-free AP-Cu∥Br2 full cells, providing a promising strategy for the development of high-performance energy storage devices.
{"title":"Engineering Artificial Protrusions of Zn Anodes for Aqueous Zinc Batteries","authors":"Jifei Sun, Xinhua Zheng, Zhengxin Zhu, Mingming Wang, Yan Xu, Ke Li, Yuan Yuan, Mingyan Chuai, Zaichun Liu, Taoli Jiang, Hanlin Hu, Wei Chen","doi":"10.1021/acs.nanolett.4c06347","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06347","url":null,"abstract":"Uncontrollable dendrite growth can jeopardize the cycle life of aqueous Zn batteries. Here, we propose a general strategy of engineering artificial protrusions (APs) on the electrode surface to regulate the distribution of the electrode interface electric field and induce stable Zn plating/stripping for Zn batteries. The junction-free AP-Cu network is constructed on Cu foil by an ultrafast Joule-heating-welding method. COMSOL simulation reveals that a stronger microelectric field is formed around the individual AP, which can effectively regulate a uniform nucleation of Zn on the AP-Cu network. Guided by the structural advantages of the AP design, the AP-Cu∥Zn cell delivers an average Coulombic efficiency (CE) of 99.85% at 2 C with an areal capacity of 1.77 mAh cm<sup>–2</sup> for over 3000 cycles. Moreover, the AP design enables stable cycling of both Zn|AP-Cu∥V<sub>2</sub>O<sub>5</sub> and anode-free AP-Cu∥Br<sub>2</sub> full cells, providing a promising strategy for the development of high-performance energy storage devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"4 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853547","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}
Hot carrier solar cells (HCSCs), harvesting the excess energy of hot carriers generated by above-band gap photoexcitation, are crucial for pushing the solar cell efficiency beyond the Shockley–Queisser limit, which is challenging to realize mainly due to fast hot-carrier cooling. By performing transient reflectance spectroscopy in a MoSe2/hBN/WS2 junction, we demonstrate the gate-tunable harvest of hot electrons from MoSe2 to WS2. By spectrally distinguishing hot-electron extraction from lattice temperature increase, we find that electrostatically doped electrons in MoSe2 can boost hot-electron extraction density (nET) by a factor up to several tens. Such enhancement arises from the interaction between hot excitons and doped electrons, which converts the excess energy of hot excitons to excitations of the Fermi sea and hence generates hot electrons. Moreover, nET can be further enhanced by reducing the conduction band offset with an external electric field. Our results provide in-depth insights into the design of HCSCs with electrostatic strategies.
{"title":"Gate-Tunable Hot Electron Extraction in a Two-Dimensional Semiconductor Heterojunction","authors":"Chenran Xu, Chen Xu, Jichen Zhou, Zhexu Shan, Wenjian Su, Wenbing Li, Xingqi Xu, Kenji Watanabe, Takashi Taniguchi, Shiyao Zhu, Dawei Wang, Yanhao Tang","doi":"10.1021/acs.nanolett.4c06416","DOIUrl":"https://doi.org/10.1021/acs.nanolett.4c06416","url":null,"abstract":"Hot carrier solar cells (HCSCs), harvesting the excess energy of hot carriers generated by above-band gap photoexcitation, are crucial for pushing the solar cell efficiency beyond the Shockley–Queisser limit, which is challenging to realize mainly due to fast hot-carrier cooling. By performing transient reflectance spectroscopy in a MoSe<sub>2</sub>/hBN/WS<sub>2</sub> junction, we demonstrate the gate-tunable harvest of hot electrons from MoSe<sub>2</sub> to WS<sub>2</sub>. By spectrally distinguishing hot-electron extraction from lattice temperature increase, we find that electrostatically doped electrons in MoSe<sub>2</sub> can boost hot-electron extraction density (<i>n</i><sub><i>ET</i></sub>) by a factor up to several tens. Such enhancement arises from the interaction between hot excitons and doped electrons, which converts the excess energy of hot excitons to excitations of the Fermi sea and hence generates hot electrons. Moreover, <i>n</i><sub><i>ET</i></sub> can be further enhanced by reducing the conduction band offset with an external electric field. Our results provide in-depth insights into the design of HCSCs with electrostatic strategies.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"11 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143853548","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}
Pub Date : 2025-04-21DOI: 10.1021/acs.nanolett.5c01265
Dylan A. Chiaro, Travis J. Hager, Kyle T. Renshaw, Bailey M. Moore, Arash Ghobadi, Rubaiyet I. Haque, Anpan Han, Bernadette M. Broderick, Suchismita Guha, Gavin M. King
Ice lithography holds the potential to bridge cryogenic electron microscopy and electron-beam lithography and achieve direct high-precision functionalization of fragile biomaterials. Here we demonstrate that 5 keV electron irradiation of ethanol ice creates a material, patterned with <100 nm resolution, that is stable in the solid phase under ambient conditions. Employing the purple membrane from Halobacterium salinarum as a test target, we additionally show that the fabrication process results in minimal biomaterial mass loss. Ketene, an unstable intermediate, was identified in the irradiated ice via Fourier transform infrared spectroscopy and is likely an important factor triggering formation of the ethanol-based material. Surface-enhanced Raman spectroscopy and additional characterization methodologies revealed that the material contains disordered graphite similar to carbon fiber and is mechanically stiff and electrically insulating. This work demonstrates a novel material for additive manufacturing in general and for the precise functionalization of biological membranes in particular.
{"title":"Precise Fabrication of Graphite-Like Material Directly on a Biological Membrane Enabled by Ethanol Ice Resist","authors":"Dylan A. Chiaro, Travis J. Hager, Kyle T. Renshaw, Bailey M. Moore, Arash Ghobadi, Rubaiyet I. Haque, Anpan Han, Bernadette M. Broderick, Suchismita Guha, Gavin M. King","doi":"10.1021/acs.nanolett.5c01265","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c01265","url":null,"abstract":"Ice lithography holds the potential to bridge cryogenic electron microscopy and electron-beam lithography and achieve direct high-precision functionalization of fragile biomaterials. Here we demonstrate that 5 keV electron irradiation of ethanol ice creates a material, patterned with <100 nm resolution, that is stable in the solid phase under ambient conditions. Employing the purple membrane from <i>Halobacterium salinarum</i> as a test target, we additionally show that the fabrication process results in minimal biomaterial mass loss. Ketene, an unstable intermediate, was identified in the irradiated ice via Fourier transform infrared spectroscopy and is likely an important factor triggering formation of the ethanol-based material. Surface-enhanced Raman spectroscopy and additional characterization methodologies revealed that the material contains disordered graphite similar to carbon fiber and is mechanically stiff and electrically insulating. This work demonstrates a novel material for additive manufacturing in general and for the precise functionalization of biological membranes in particular.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"38 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857810","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}
The Schottky barrier height can be greatly affected by the metal diffusion, reaction, and covalent bonding formation at the contact. Exploring novel methods and revealing the fundamental mechanisms for contact engineering are of vital importance for microelectronic devices. Here, the annealing induced interfacial reactions at Cu-ReSe2 contact are dynamically revealed from the atomic scale. Accompanied by the diffusion of Se to Cu, ReSe2 is gradually decomposed to a thin Re interlayer through a “chain-by-chain” manner. Theoretical calculations show that the Cu atoms can facilitate the chemical bond breaking of ReSe2, significantly lowering the Se diffusion energy barrier toward Cu. The formed Re/ReSe2 heterostructure presents a metal-like band structure, which underscores the critical role of Cu in altering the interfacial chemistry and promoting carrier transport across the interface. Our results can provide vital insights into the contact properties of ReSe2 and provide a possible method for fabricating high-performance ReSe2-based devices.
{"title":"In Situ Atomic Tracking on the Interfacial Etching and Reconfiguration of Cu-ReSe2 Contact during Thermal Annealing","authors":"Xing Li, Weiwei Yan, Dongyang Wang, Longbin Yan, Wen-Tao Huang, Xiaoyu Guo, Yao Guo, Shaobo Cheng, Yimei Zhu, Chongxin Shan","doi":"10.1021/acs.nanolett.5c00092","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00092","url":null,"abstract":"The Schottky barrier height can be greatly affected by the metal diffusion, reaction, and covalent bonding formation at the contact. Exploring novel methods and revealing the fundamental mechanisms for contact engineering are of vital importance for microelectronic devices. Here, the annealing induced interfacial reactions at Cu-ReSe<sub>2</sub> contact are dynamically revealed from the atomic scale. Accompanied by the diffusion of Se to Cu, ReSe<sub>2</sub> is gradually decomposed to a thin Re interlayer through a “chain-by-chain” manner. Theoretical calculations show that the Cu atoms can facilitate the chemical bond breaking of ReSe<sub>2</sub>, significantly lowering the Se diffusion energy barrier toward Cu. The formed Re/ReSe<sub>2</sub> heterostructure presents a metal-like band structure, which underscores the critical role of Cu in altering the interfacial chemistry and promoting carrier transport across the interface. Our results can provide vital insights into the contact properties of ReSe<sub>2</sub> and provide a possible method for fabricating high-performance ReSe<sub>2</sub>-based devices.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"69 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857806","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}
Pub Date : 2025-04-21DOI: 10.1021/acs.nanolett.5c00148
Yanzhao Guo, Giulio Coccia, Vinaya Kumar Kavatamane, Argyro N. Giakoumaki, Anton N. Vetlugin, Roberta Ramponi, Cesare Soci, Paul E. Barclay, John P. Hadden, Anthony J. Bennett, Shane M. Eaton
Ensemble negatively charged nitrogen-vacancy centers in diamond are promising quantum sensors. To optimize their sensitivity, it is crucial to increase the number of spins sampled and maximize their coupling to the detection system without degrading their spin properties. In this paper, we demonstrate enhanced quantum magnetometry via a buried laser-written waveguide in diamond with 4.5 ppm nitrogen-vacancy centers. The waveguide-coupled nitrogen-vacancy centers exhibit spin coherence properties comparable to those of nitrogen-vacancy centers in pristine diamond. Waveguide-enhanced magnetic field sensing is demonstrated in a fiber-coupled integrated photonic chip, where probing an increased volume of high-density spins results in 63 pT·Hz–1/2 of DC magnetic field sensitivity and 20 pT·Hz–1/2 of AC magnetic field sensitivity. This on-chip sensor realizes at least an order of magnitude improvement in sensitivity compared to the conventional confocal detection setup, paving the way for high-sensitivity quantum magnetometry with nitrogen-vacancy ensembles.
{"title":"Enhanced Quantum Magnetometry with a Femtosecond Laser-Written Integrated Photonic Diamond Chip","authors":"Yanzhao Guo, Giulio Coccia, Vinaya Kumar Kavatamane, Argyro N. Giakoumaki, Anton N. Vetlugin, Roberta Ramponi, Cesare Soci, Paul E. Barclay, John P. Hadden, Anthony J. Bennett, Shane M. Eaton","doi":"10.1021/acs.nanolett.5c00148","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c00148","url":null,"abstract":"Ensemble negatively charged nitrogen-vacancy centers in diamond are promising quantum sensors. To optimize their sensitivity, it is crucial to increase the number of spins sampled and maximize their coupling to the detection system without degrading their spin properties. In this paper, we demonstrate enhanced quantum magnetometry via a buried laser-written waveguide in diamond with 4.5 ppm nitrogen-vacancy centers. The waveguide-coupled nitrogen-vacancy centers exhibit spin coherence properties comparable to those of nitrogen-vacancy centers in pristine diamond. Waveguide-enhanced magnetic field sensing is demonstrated in a fiber-coupled integrated photonic chip, where probing an increased volume of high-density spins results in 63 pT·Hz<sup>–1/2</sup> of DC magnetic field sensitivity and 20 pT·Hz<sup>–1/2</sup> of AC magnetic field sensitivity. This on-chip sensor realizes at least an order of magnitude improvement in sensitivity compared to the conventional confocal detection setup, paving the way for high-sensitivity quantum magnetometry with nitrogen-vacancy ensembles.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"43 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857807","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}
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