A5021858472- Magnetic properties of thin films
- Advancements in Battery Materials
- Physics of Superconductivity and Magnetism
- Advanced Battery Materials and Technologies
- Semiconductor Quantum Structures and Devices
- Electronic and Structural Properties of Oxides
- Supercapacitor Materials and Fabrication
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Electromagnetic wave absorption materials
- Advanced Semiconductor Detectors and Materials
- Quantum and electron transport phenomena
- Advanced Antenna and Metasurface Technologies
- Semiconductor materials and devices
- Metamaterials and Metasurfaces Applications
- Metal and Thin Film Mechanics
- Characterization and Applications of Magnetic Nanoparticles
- Chalcogenide Semiconductor Thin Films
- ZnO doping and properties
- Ecology and Vegetation Dynamics Studies
- Advanced Photocatalysis Techniques
- Magnetic and transport properties of perovskites and related materials
- Nanowire Synthesis and Applications
- Lignin and Wood Chemistry
- Urban Green Space and Health
Yunnan University
2024
Fudan University
2013-2023
Tsinghua University
2015-2023
Institute of Zoology
2021
Guangdong Academy of Sciences
2021
Semiconductor Manufacturing International (China)
2021
Collaborative Innovation Center of Chemistry for Energy Materials
2015-2020
High Magnetic Field Laboratory
2018
Yanshan University
2016
University of Wisconsin–Madison
2015
The emergence of a topologically nontrivial vortex-like magnetic structure, the skyrmion, has launched new concepts for memory devices. Extensive studies have theoretically demonstrated ability to encode information bits by using chain skyrmions in one-dimensional nanostripes. Here, we report experimental observation skyrmion FeGe nanostripes high-resolution Lorentz transmission electron microscopy. Under an applied field, observe that helical ground states with distorted edge spins evolve...
In this study, CoNi flower-like hierarchical microstructures with different sizes were obtained via a one-step solvothermal method by simply adjusting the concentration of precursors and surfactant. The microflowers possess uniform tunable size, good monodispersity, remarkable magnetic microwave absorption properties as well electron holography phase images. Characterization results have demonstrated dependency on their morphologies sizes. exhibit stray fields that might be determined...
A tunable response frequency is highly desirable for practical applications of microwave absorption materials but remains a great challenge. Here, hollow lightweight polydopamine@α-MnO2 microspindles were facilely synthesized with the governed by aspect ratio. The size hard template key factor to achieve unique shape; polymer layer uniform thickness plays an important role in obtaining spindles homogeneous size. With ratio increasing, maximum reflection loss, as well bandwidth (<−10 dB),...
Significance The rapid growth of data volume demands faster and denser storage devices. noncoplanar swirling spin texture, known as magnetic skyrmion, has potential application in future memory To realize such applications, it is essential to understand the properties individual skyrmion patterned nanoelements. While quite a number theoretical efforts have been made this field, direct experimental demonstration real modeling system challenge. Here, we report visualization cluster states FeGe...
Abstract Niobates with shear ReO 3 crystal structures are remarkably promising anode materials for Li + batteries due to their large capacities, inherent safety, and high cycling stability. However, they generally suffer from limited rate capabilities rooted in insufficient electronic conductivities. Here, micrometer‐sized copper niobate (Cu 2 Nb 34 O 87 ) bulk as a new material having conductivity of 2.1 × 10 −5 S cm −1 an impressive average diffusion coefficient ≈3.5 −13 s is exploited,...
We report the direct evidence of field-dependent character interaction between individual magnetic skyrmions as well and edges in B20-type FeGe nanostripes observed by means high resolution Lorentz transmission electron microscopy. It is shown that above certain critical values external field such long-range skyrmion interactions change from attraction to repulsion. Experimentally measured equilibrium inter-skyrmion skrymion-edge distances function applied shows quantitative agreement with...
Recently, it is still a great challenge to develop new type of absorber that possesses special advantages low cost, ultrawide bandwidth, and strong absorption intensity. Herein, the unique "Matryoshka doll"-like CeO2 microspheres with tunable interspaces were successfully synthesized by facile template-free method. The as-synthesized hierarchical yolk–shell constructed layer outer shell multiple inner cores. interspace gap can be simply adjusted only altering solvothermal reaction time....
Perovskite-type oxides are widely used for energy conversion and storage, but their rate-inhibiting phase transition large volume change hinder the applications of most perovskite-type high-rate electrochemical storage. Here, it is shown that a cation-deficient perovskite CeNb3 O9 (CNO) can store sufficient amount lithium at high charge/discharge rate, even when sizes synthesized particles on order micrometers. At 60 C (15 A g-1 ), corresponding to 1 min charge, CNO anode delivers over 52.8%...
Abstract A novel polyoxometalates (POMs) mediated direct biomass fuel cell (DBFC) was used in this study to directly convert lignin electricity at low temperatures with high power output and Faradaic efficiency. When phosphomolybdic acid H 3 PMo 12 O 40 (PMo ) as the electron proton carrier anode solution a carbon electrode, 2 final acceptor under catalysis of Pt, peak density reached 0.96 mW cm −2 , 560 times higher than that phenol‐fueled microbial cells (MFCs). cathode reaction catalyzed...
Local heterogeneity in crystal lattice is directly observed synthesized Li<sub>2</sub>MnO<sub>3</sub>/LiMO<sub>2</sub> (M = Ni, Mn) cathode materials. With SAED application, for the first time, we accordingly uncover that induced by different Li<sub>2</sub>MnO<sub>3</sub> atomic arrangements coexisting same domain.
Fe<sub>3</sub>O<sub>4</sub>/PDA vesicle Janus nanospheres were successfully synthesized, and they exhibited an ultra-wide effective band as wide 11.6 GHz, covering 73% of the whole measured frequency range (2–18 GHz), a strong absorption intensity high −50.0 dB due to asymmetric polarization magnetic coupling effect.
The magnetic skyrmion is a topologically stable vortex-like spin texture that offers great promise as information carriers for future spintronic devices. In two-dimensional chiral magnet, it was generally considered tilted field harmful to its formation and stability. Here we investigated the angular-dependent stability of skyrmions in FeGe nanosheets by using high-resolution Lorentz transmission electron microscopy (Lorentz TEM). Besides theoretically predicted destruction lattice state an...
Defect-rich Ag<sub>2</sub>Se QDs were prepared controllably for sensitizing TiO<sub>2</sub> toward high-performance visible-light-driven hydrogen-evolution photocatalysts.
Abstract Intercalation electrode materials store Na by incorporation into their framework structure without phase transformation and substantial large volume, resulting in the excellent cycling stability during electrochemical cycling. However, challenges arise due to a low capacity of intercalation for sodium‐ion batteries (SIBs). Here, perovskite oxide (Ce 1/3 NbO 3 (CNO)) as an anode with dual functions high is explored. The + storage CNO (141.3 mAh g ‐1 ) originates from not only...
Abstract Ternary transition metal oxides (TMOs) are highly potential electrode materials for lithium ion batteries (LIBs) due to abundant defects and synergistic effects with various elements in a single structure. However, low electronic/ionic conductivity severe volume change hamper their practical application storage. Herein, nanosheet‐assembled hollow single‐hole Ni–Co–Mn oxide (NHSNCM) spheres oxygen vacancies can be obtained through facile hydrothermal reaction, which makes both ends...
Abstract Interfaces in semiconductor heterostructures is of continuously greater significance the trend scaling materials down to atomic limit. Since atoms tend behave more irregularly around interfaces than internal materials, accurate energy band alignment becomes a major challenge, which determines ultimate performance devices. Therefore, comprehensive understanding interplay between heterointerface, band, and macro‐performance desiderated. Here, such explored by investigating asymmetric...
Recently, 2D ferromagnetic materials have aroused wide interest for their magnetic properties and potential applications in spintronic topological devices. However, actual been severely hindered by intricate challenges such as the unclear spin arrangement. In particular, evolution of texture driven high-density electron current, which is an essential condition fabricating devices, remains unclear. Herein, current-pulse-driven textures material Fe3GeTe2 thoroughly investigated situ Lorentz...