Nano Letters最新文献

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Transmon Qubit Using Sn as a Junction Superconductor 利用Sn作为结超导体的传输量子比特

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-09 DOI: 10.1021/acs.nanolett.5c05276

Amrita Purkayastha,Amritesh Sharma,Param J. Patel,An-Hsi Chen,Connor P. Dempsey,Shreyas Asodekar,Subhayan Sinha,Maxime Tomasian,Mihir Pendharkar,Christopher J. Palmstrøm,Moïra Hocevar,Kun Zuo,Michael Hatridge,Sergey M. Frolov

Superconductor qubits typically use aluminum–aluminum oxide tunnel junctions to provide the nonlinear inductance. Junctions with semiconductor barriers make it possible to vary the superconductor material and explore beyond aluminum. We use InAs semiconductor nanowires coated with thin superconducting shells of β-Sn to realize transmon qubits. By tuning the Josephson energy with a gate voltage, we adjust the qubit frequency over a range of 3 GHz. The longest energy relaxation time, T1 = 27 μs, is obtained at the lowest qubit frequencies, while the longest echo dephasing time, T2 = 1.8 μs, is achieved at higher frequencies. We assess the possible factors limiting coherence times in these devices and discuss steps to enhance performance through improvements in materials fabrication and circuit design.

引用次数: 0

Dual Chemical Regulations for Combined Anti-Resorption and Osteo-Anabolism to Reverse Osteoporosis 联合抗骨吸收和骨合成代谢逆转骨质疏松症的双重化学调节

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-09 DOI: 10.1021/acs.nanolett.6c00007

Ruixuan He,Bowen Yang,Jianlin Shi

Osteoporosis is characterized by serious calcium loss in bone, where osteoclast-induced bone resorption overwhelms osteoblast-based bone formation. Herein, a dual chemical regulation strategy is proposed for reversing osteoporosis by antioxidation to inhibit osteoclastic bone resorption, in combination with pro-mineralization to favor osteoblast-based anabolic bone formation, synergistically functioning to remodel bone homeostasis. Such a dual chemical approach is achieved by an elaborately engineered nanomedicine, which can degrade in the acidic region of osteoporosis, releasing Mn2+, epicatechin (EC), and silicate species. Mn2+ coordinated by EC significantly enhances its antioxidant activity, thereby scavenging excessive reactive oxygen species in the osteoclast and inhibiting bone resorption. Additionally, the silicate species released from the nanoplatform promote mineralization reaction to facilitate osteoblast-based new bone formation. Such a nanomedicine is capable of efficiently reversing osteoporosis, as demonstrated by both in vitro and in vivo results. This work provides a feasible approach for osteoporosis treatment by a dual chemical regulation approach.

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引用次数: 0

Creation and Detection of Optical Spin in a Coupled Emitter–Plasmon System 发射体-等离子体耦合系统中光自旋的产生与检测

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-09 DOI: 10.1021/acs.nanolett.5c05644

Yining Xuan,Daito Miyazaki,Yuki Ishikawa,Hiromi Okamoto,Mark Sadgrove

We investigate the system of a linearly polarized dipole emitter coupled to the plasmonic modes of a gold nanorod (GNR). We show numerically that asymmetrical placement of the emitter relative to the GNR axes gives rise to a net optical spin for the field inside the rod, despite the apparent achirality of the system. We experimentally demonstrate this effect using electron beam excitation to create an effective point dipole emitter and coupling luminescence evanescently to a nanofiber probe which supports spin-momentum locked light. This converts the net spin of the field into a net directionality of propagation in the fiber modes, allowing detection in the far field.

引用次数: 0

Distinct Tailoring Excitons in WS2/MoSe2 Heterostructure by Rectification of Femtosecond Laser Shock Peening 用飞秒激光冲击强化整流WS2/MoSe2异质结构中的不同剪裁激子

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-09 DOI: 10.1021/acs.nanolett.5c04930

Tsegaye Bojago Dado,Yimeng Shi,Tingting Zou,Zhaohang Li,Xingang Zhao,Yuwei Shan,Ying Song,Rahul A. Rajan,Wei Xin,Jianjun Yang

Exciton manipulation in two-dimensional materials and their heterostructures is pivotal for advancing optoelectronics and quantum technologies. Pressure-based approaches are powerful for tuning excitonic states; however, they face a fundamental limitation in achieving permanent, spatially uniform modulation in the absence of induced structural defects. Herein, we introduce a rectified femtosecond laser shock peening (R-FLSP) strategy for permanent and nondestructive modulation of excitonic states in WS2/MoSe2 heterostructures. The hybrid architecture is obtained by integrating an additional air cavity and poly(methyl methacrylate) layer, which enables contact-free, spatially uniform shockwave pressure engineering. Under this rectified pressure, monolayers demonstrate photoluminescence quenching with a biphasic energy shift (blueshift-to-redshift), confirming a direct to indirect bandgap transition. In heterostructures, interlayer excitons display 4-fold intensity augmentation at 1.09 GPa, suggesting enhanced interlayer electronic coupling and exciton transition by the R-FLSP treatment. This study establishes a paradigm for engineering fundamental excitonic characteristics and optoelectronic functionalities in two-dimensional materials.

{"title":"Distinct Tailoring Excitons in WS2/MoSe2 Heterostructure by Rectification of Femtosecond Laser Shock Peening","authors":"Tsegaye Bojago Dado,Yimeng Shi,Tingting Zou,Zhaohang Li,Xingang Zhao,Yuwei Shan,Ying Song,Rahul A. Rajan,Wei Xin,Jianjun Yang","doi":"10.1021/acs.nanolett.5c04930","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c04930","url":null,"abstract":"Exciton manipulation in two-dimensional materials and their heterostructures is pivotal for advancing optoelectronics and quantum technologies. Pressure-based approaches are powerful for tuning excitonic states; however, they face a fundamental limitation in achieving permanent, spatially uniform modulation in the absence of induced structural defects. Herein, we introduce a rectified femtosecond laser shock peening (R-FLSP) strategy for permanent and nondestructive modulation of excitonic states in WS2/MoSe2 heterostructures. The hybrid architecture is obtained by integrating an additional air cavity and poly(methyl methacrylate) layer, which enables contact-free, spatially uniform shockwave pressure engineering. Under this rectified pressure, monolayers demonstrate photoluminescence quenching with a biphasic energy shift (blueshift-to-redshift), confirming a direct to indirect bandgap transition. In heterostructures, interlayer excitons display 4-fold intensity augmentation at 1.09 GPa, suggesting enhanced interlayer electronic coupling and exciton transition by the R-FLSP treatment. This study establishes a paradigm for engineering fundamental excitonic characteristics and optoelectronic functionalities in two-dimensional materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"9 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139004","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

Asymmetric Spin Canting and Demagnetization Dynamics Driven by Laser Fields in Two-Dimensional Altermagnets 二维交替磁体中激光场驱动的非对称自旋倾斜和退磁动力学

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-09 DOI: 10.1021/acs.nanolett.5c04244

Shuo Li,Ran Wang,Thomas Frauenheim,Zhaobo Zhou,Junjie He

Laser-induced ultrafast magnetization dynamics have been well established in conventional magnets but remain unexplored in altermagnets (AMs). Using real-time time-dependent density functional theory (rt-TDDFT), we demonstrate that laser pulses can drive asymmetric demagnetization dynamics between the two Fe sublattices in the two-dimensional (2D) semiconducting AM, Fe2WTe4, leading to a photoinduced ferrimagnetic state with a net magnetization of approximately 0.3 μB per unit cell. This metastable magnetization originates from the momentum-dependent spin-splitting characteristic of d-wave AMs, which gives rise to an anisotropic optical intersite spin transfer effect (OISTR). Furthermore, the asymmetric demagnetization is accompanied by non-collinear spin dynamics, resulting in distinct spin canting angles for two Fe sublattices. Importantly, these spin dynamics are tunable by the in-plane polarization angle of the laser field. Our findings provide microscopic insight into the ultrafast control of magnetization in 2D AMs and open new avenues for light-driven manipulation of spin textures in AM systems.

{"title":"Asymmetric Spin Canting and Demagnetization Dynamics Driven by Laser Fields in Two-Dimensional Altermagnets","authors":"Shuo Li,Ran Wang,Thomas Frauenheim,Zhaobo Zhou,Junjie He","doi":"10.1021/acs.nanolett.5c04244","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c04244","url":null,"abstract":"Laser-induced ultrafast magnetization dynamics have been well established in conventional magnets but remain unexplored in altermagnets (AMs). Using real-time time-dependent density functional theory (rt-TDDFT), we demonstrate that laser pulses can drive asymmetric demagnetization dynamics between the two Fe sublattices in the two-dimensional (2D) semiconducting AM, Fe2WTe4, leading to a photoinduced ferrimagnetic state with a net magnetization of approximately 0.3 μB per unit cell. This metastable magnetization originates from the momentum-dependent spin-splitting characteristic of d-wave AMs, which gives rise to an anisotropic optical intersite spin transfer effect (OISTR). Furthermore, the asymmetric demagnetization is accompanied by non-collinear spin dynamics, resulting in distinct spin canting angles for two Fe sublattices. Importantly, these spin dynamics are tunable by the in-plane polarization angle of the laser field. Our findings provide microscopic insight into the ultrafast control of magnetization in 2D AMs and open new avenues for light-driven manipulation of spin textures in AM systems.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"314 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139005","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

Achieving Crystal-to-Amorphous Transition without Phase Collapse in a Stable Gd-Based High-Entropy Perovskite Anode 在稳定的gd基高熵钙钛矿阳极中实现晶体到非晶的转变而不发生相坍塌

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-08 DOI: 10.1021/acs.nanolett.5c05873

Xuefeng Liu,Yongxiang Ning,Mengya Wang,Jinxiang Zheng,Gaoqian Yuan,Yage Li,Wen Lei,Zhaohui Meng,Guangyin Liu

Transition metal oxide anodes are plagued by severe volume expansion and structural collapse, which drastically shorten their cycling lifespans in lithium-ion batteries. Herein, we report an orthorhombic ABO3-type Gd(FeCoNiCrMn)O3 (Gd-HEO) material in which lattice-site and high-entropy engineering synergistically boost structural integrity and cycling stability. The A-site Gd builds a rigid 4f scaffold and induces tilting of the BO6 octahedra, thereby expanding ion transport channels. Meanwhile, the mixed cations at the B-site not only promotes delocalize electrons but, more importantly, establishes a stress-dissipation network. Experimental results show that entropy-driven structural disorder triggers a self-limiting crystal-to-amorphous transition. Specifically, the material fragments into ∼2 nm nanodomains embedded in an amorphous matrix, forming a semicohesive nanoarchitecture that absorbs volume-change stress through structural adjustment. Benefiting from these structural merits, the Gd-HEO electrode retains 88% capacity after 1000 cycles with minimal volume variation, underscoring elemental diversity as a key to optimizing multication electrode materials.

{"title":"Achieving Crystal-to-Amorphous Transition without Phase Collapse in a Stable Gd-Based High-Entropy Perovskite Anode","authors":"Xuefeng Liu,Yongxiang Ning,Mengya Wang,Jinxiang Zheng,Gaoqian Yuan,Yage Li,Wen Lei,Zhaohui Meng,Guangyin Liu","doi":"10.1021/acs.nanolett.5c05873","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c05873","url":null,"abstract":"Transition metal oxide anodes are plagued by severe volume expansion and structural collapse, which drastically shorten their cycling lifespans in lithium-ion batteries. Herein, we report an orthorhombic ABO3-type Gd(FeCoNiCrMn)O3 (Gd-HEO) material in which lattice-site and high-entropy engineering synergistically boost structural integrity and cycling stability. The A-site Gd builds a rigid 4f scaffold and induces tilting of the BO6 octahedra, thereby expanding ion transport channels. Meanwhile, the mixed cations at the B-site not only promotes delocalize electrons but, more importantly, establishes a stress-dissipation network. Experimental results show that entropy-driven structural disorder triggers a self-limiting crystal-to-amorphous transition. Specifically, the material fragments into ∼2 nm nanodomains embedded in an amorphous matrix, forming a semicohesive nanoarchitecture that absorbs volume-change stress through structural adjustment. Benefiting from these structural merits, the Gd-HEO electrode retains 88% capacity after 1000 cycles with minimal volume variation, underscoring elemental diversity as a key to optimizing multication electrode materials.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"9 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139039","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

Spin-Wave Frequency Multiplication by Magnetic Vortex Cores 磁旋涡核的自旋波倍频

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-08 DOI: 10.1021/acs.nanolett.5c06133

Cheng-Jie Wang,Yuxin Li,Zhe Ding,Pengfei Wang,Fazhan Shi,Jiangfeng Du

Frequency multiplication involves generating harmonics from an input frequency, a technique particularly useful for integrating spin-wave devices operating at different frequencies. While topological magnetic textures offer distinct advantages in spin-wave applications, frequency multiplication has not yet been observed in these structures. Here, we study the magnetization dynamics of magnetic vortices formed in micron-sized disks via wide-field magnetic imaging. We found the occurrence of coherent spin-wave harmonics arising from the gyration of vortex cores driven by microwave fields. This phenomenon reveals a universal mechanism where the periodical motion of delta function-like objects such as vortex cores gives rise to a frequency comb. Our results pave the way for creating nanoscale, tunable spin-based frequency multipliers and open new possibilities for developing miniature frequency combs in a variety of systems.

引用次数: 0

Scalable Production and Covalent Functionalization of WS2 Nanosheets for Membrane Fabrication and Ion Separation 用于膜制造和离子分离的WS2纳米片的规模化生产和共价功能化

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-08 DOI: 10.1021/acs.nanolett.5c04248

Yue Zhang,Mingzi Sun,Ruijie Yang,Ting Ying,Liang Mei,Ruixin Yan,Weikang Zheng,Honglu Hu,Alicia Kyoungjin An,Bilu Liu,Damien Voiry,Jingyun Fang,Chuyang Y. Tang,Bolong Huang,Zhiyuan Zeng

Transition metal dichalcogenide (TMD) membranes offer a promising solution to freshwater scarcity by desalinating seawater through ion blocking. However, research has largely focused on MoS2 due to its efficient exfoliation via n-butyl lithium intercalation, unlike other TMDs. Here, we report scalable production of WS2 nanosheets by increasing the Li+ intercalation driving force (increasing current density up to 10 mA g–1 and decreasing cutoff voltage down to 0.7 V) of the electrochemical intercalation method. WS2 membranes were then fabricated by organohalide functionalization followed by vacuum filtration. The resulting membranes exhibit a high rejection rate of up to 90% for divalent and trivalent cations. The selectivity for monovalent/divalent and monovalent/trivalent cations reaches up to 8.7 and 9.9, respectively, in both single and binary cation solutions. Theoretical calculations reveal that the improved rejection rates of divalent and trivalent cations compared to those of monovalent cations originate from the stronger binding preferences of monovalent cations with functionalized WS2 membranes.

{"title":"Scalable Production and Covalent Functionalization of WS2 Nanosheets for Membrane Fabrication and Ion Separation","authors":"Yue Zhang,Mingzi Sun,Ruijie Yang,Ting Ying,Liang Mei,Ruixin Yan,Weikang Zheng,Honglu Hu,Alicia Kyoungjin An,Bilu Liu,Damien Voiry,Jingyun Fang,Chuyang Y. Tang,Bolong Huang,Zhiyuan Zeng","doi":"10.1021/acs.nanolett.5c04248","DOIUrl":"https://doi.org/10.1021/acs.nanolett.5c04248","url":null,"abstract":"Transition metal dichalcogenide (TMD) membranes offer a promising solution to freshwater scarcity by desalinating seawater through ion blocking. However, research has largely focused on MoS2 due to its efficient exfoliation via n-butyl lithium intercalation, unlike other TMDs. Here, we report scalable production of WS2 nanosheets by increasing the Li+ intercalation driving force (increasing current density up to 10 mA g–1 and decreasing cutoff voltage down to 0.7 V) of the electrochemical intercalation method. WS2 membranes were then fabricated by organohalide functionalization followed by vacuum filtration. The resulting membranes exhibit a high rejection rate of up to 90% for divalent and trivalent cations. The selectivity for monovalent/divalent and monovalent/trivalent cations reaches up to 8.7 and 9.9, respectively, in both single and binary cation solutions. Theoretical calculations reveal that the improved rejection rates of divalent and trivalent cations compared to those of monovalent cations originate from the stronger binding preferences of monovalent cations with functionalized WS2 membranes.","PeriodicalId":53,"journal":{"name":"Nano Letters","volume":"5 1","pages":""},"PeriodicalIF":10.8,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146139083","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

Densely Fluorinated Polymer Dots with Peak Absorption beyond 1000 nm for High-Contrast NIR-II Fluorescence Imaging 高对比度NIR-II荧光成像，峰值吸收超过1000 nm的密集氟化聚合物点

IF 10.8 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-08 DOI: 10.1021/acs.nanolett.5c05422

Ye Liu,Wenting Li,Mai Xu,Yang Li,Xiaofeng Fang,Changfeng Wu

Fluorescence probes in the second near-infrared (NIR-II) window hold promise for high-contrast optical imaging. However, it remains challenging to develop organic fluorophores with a peak absorption beyond 1000 nm. Here, we explore a dense fluorination strategy to tune the optical properties of semiconducting polymer toward the NIR-II region. The densely fluorinated polymer dots (Pdots) exhibit a peak absorption at ∼1040 nm and fluorescence at ∼1120 nm with a quantum yield of ∼1% in aqueous solution. A direct side-chain PEGylation facilitates the preparation of small Pdots of ∼25 nm diameter, while the hydrophobic fluorinated polymers tend to form nanoparticles larger than 150 nm. The small Pdots enabled in vivo fluorescence imaging via 1064 nm excitation and 1450 nm band-pass detection, while the Hessian-matrix processing method significantly enhances the image contrast of small blood vessels. This study indicates that the 1064 nm excitable Pdots are promising for in vivo fluorescence imaging of deep turbid tissues.

引用次数: 0

Disorder-Induced Mottness in a Doped Mott Insulator. 掺杂Mott绝缘子的无序诱导mottm。

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters

Pub Date : 2026-02-07 DOI: 10.1021/acs.nanolett.5c05841

Hyungryul Yang, Gyeongbo Kim, Byeongin Lee, Dirk Wulferding, Bo Gyu Jang, Doohee Cho

Persistence of the Mott insulating state away from integer filling remains unresolved. Although it is often attributed to electronic phase separation, theoretical models still predict a critical doping that differs markedly from experiments. Here, we show that intrinsic disorder is the missing ingredient. Scanning tunneling microscopy and spectroscopy measurements on Fe-intercalated 1T-TaS₂, an electron-doped Mott insulator, reveal Mott regions nucleated at point defects and charge density wave domain boundaries. These defects act as local charge sinks; the resulting sharp chemical potential differences produce narrow Mott depletion plateaus. In contrast, the hole-doped 1T-TaS₂ layer of 4Hb-TaS₂ displays no incompressible regions in the vicinity of similar impurities. This contrasting behavior demonstrates that local disorder, which compensates for the doping effect, plays a key role in shaping the inhomogeneous electronic structure of doped Mott insulators.

引用次数: 0

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