A5073938530- Luminescence Properties of Advanced Materials
- Phase-change materials and chalcogenides
- Material Dynamics and Properties
- Glass properties and applications
- Metallic Glasses and Amorphous Alloys
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Radiation Detection and Scintillator Technologies
- Catalytic Processes in Materials Science
- Luminescence and Fluorescent Materials
- Liquid Crystal Research Advancements
- Chalcogenide Semiconductor Thin Films
- Gas Sensing Nanomaterials and Sensors
- Transition Metal Oxide Nanomaterials
- Catalysis and Oxidation Reactions
- Nonlinear Optical Materials Studies
- Copper-based nanomaterials and applications
- Nanomaterials for catalytic reactions
- Advanced ceramic materials synthesis
- Advanced Memory and Neural Computing
- earthquake and tectonic studies
- Membrane Separation Technologies
- Ammonia Synthesis and Nitrogen Reduction
- Theoretical and Computational Physics
- Solid-state spectroscopy and crystallography
Aarhus University
2020-2025
Chinese Academy of Sciences
2022-2025
Lanzhou University
2024-2025
Institute of Geochemistry
2025
Zhengzhou University
2025
Nanchang University
2022-2024
Liaoning Technical University
2024
Xuzhou University of Technology
2024
Guangxi University
2024
Shanghai Institute of Microsystem and Information Technology
2022-2023
Structural switch for fast switching Phase-change materials are important computer memory. They can quickly from glassy to crystalline using a thermal pulse and then lock in that structure long time at lower temperature. Zalden et al. probed the underlying atomic of two phase-change during this ultrafast x-rays simulations (see Perspective by Rao ). A liquid-liquid phase transition both allowed high temperatures. The lower-temperature glass locks structure, allowing long-term memory storage....
Abstract Controlling crystallization kinetics is key to overcome the temperature–time dilemma in phase change materials employed for data storage. While amorphous must be preserved more than 10 years at slightly above room temperature ensure integrity, it has crystallize on a timescale of several nanoseconds following moderate increase near 2/3 T m compete with other memory devices such as dynamic random access (DRAM). Here, calorimetric demonstration that this striking variation involves...
Near-infrared (NIR) luminescent materials have attracted enormous attention for the cutting-edge applications in optical thermometer and NIR LEDs. Herein, we report a highly efficient Cr3+-doped phosphor, BaAl4Sb2O12:0.024Cr3+ (BASO:Cr3+), with 91% internal quantum efficiency. Strikingly, BASO:Cr3+ possesses rare typical Stokes/anti-Stokes phonon sidebands. The Stokes sideband decreases increasing temperature, while anti-Stokes one increases considerably. Consequently, this inverse change...
Trap engineering is widely applied to contend with thermal quenching of phosphors. However, the incidental detriment luminescent efficiency has long been neglected. Herein, we propose a paradigm for achieving high-performing Bi3+-doped phosphor moderate trap engineering. Through introducing appropriate traps in neutral atmosphere and proper doping concentration, have successfully created novel Ba2GdAlO5:Bi3+ yellow that exhibits exceptional stability (104.1%@423 K) high internal quantum...
In an increasing manner, near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) are considered to be exemplary light sources owing their notable attributes of elevated output power, economical nature, and exceptional portability. NIR phosphors critical components pc-LEDs. Herein, we report a novel blue excitable phosphor CaLu2ZrScAl3O12:Cr3+ (CLZSA:Cr3+) as crucial efficient broadband emitter. The CLZSA:Cr3+ displays intense emission peaking at 776 nm with full width...
Using high energy synchrotron x-ray radiation combined with electrostatic levitation, in situ structural analysis of a bulk metallic glass forming liquid is performed from above the liquidus temperature down to transition. The data indicate liquid-liquid transition (LLT) deeply undercooled state at $T/{T}_{g}\ensuremath{\sim}1.2$ which manifests as maximum heat capacity and an abrupt shift first peak position total structure factor absence pronounced density change. Analysis corresponding...
The slow $\ensuremath{\beta}$ relaxation is understood to be a universal feature of glassy dynamics. Its presence in bulk metallic glasses (BMGs) evidence broad time spectrum that extends deep within the state. Despite breadth research devoted this phenomenon, its microscopic origin still not fully understood. low-temperature aging behavior and atomic structural rearrangements ${\mathrm{Au}}_{49}$${\mathrm{Cu}}_{26.9}$${\mathrm{Si}}_{16.3}$${\mathrm{Ag}}_{5.5}$${\mathrm{Pd}}_{2.3}$ BMG are...
A striking anomaly in the viscosity of Te85Ge15 alloys noted by Greer and coworkers from work Neumann et al. is reminiscent equally comparison liquid tellurium water anomalies documented long ago Kanno In view power laws that are used to fit data on water, we analyze using Speedy-Angell power-law form, find a good account with singularity Ts only 25 K below eutectic temperature. However, heat capacity this case not diverging, but instead exhibit sharp maximum like observed fast cooling...
Abstract Controlling a state of material between its crystalline and glassy phase has fostered many real-world applications. Nevertheless, design rules for crystallization vitrification kinetics still lack predictive power. Here, we identify stoichiometry trends these processes in change materials, i.e. along the GeTe-GeSe, GeTe-SnTe, GeTe-Sb 2 Te 3 pseudo-binary lines employing pump-probe laser setup calorimetry. We discover clear dependence speed line connecting regions characterized by...
Abstract Crystal‐field engineering can obtain targeted emission more effectively, compared with the laborious experimental screening of new hosts. However, there still lack paradigms for obtaining Ce 3+ ‐doped cyan phosphors by crystal‐field engineering, and correlation between local structure ions has rarely been disclosed. Herein, through substituting K + in 3‐y Rb y GdSi 2 O 7 :Ce , color changes from yellow‐green to finally blue. In addition, intensity thermal stability greatly improve,...
The NIR phosphor Sr 3 SiAl 10 O 20 , which realizes ultra-broadband emission via dual energy transfer within two Cr 3+ emitters and → Yb can be used for pc-LEDs, showing great potential in the fields of night-vision illumination, nondestructive surveillance, information encryption.
Abstract Achieving emission peaks in the near‐infrared II regions (NIR II) and tunable (NIR) is still a huge challenge development of NIR phosphors. Here, series LiSc 1‐y Ga y W 2 O 8 :Cr 3+ phosphors are reported based on crystal engineering, whose luminescence can be tuned from NIR‐II to I. LiScW possesses an ultra‐wide range 850–1400 nm with peak at 1069 full width half maximum (FWHM) 225 main light located region. Introducing into form , spectrum blueshifted, which better aligns...
Abstract Reduction of fO2 in magma by organic carbon or addition external S to can play a major role the formation magmatic Ni-Cu sulfide deposits convergent tectonic settings. This study evaluates two competing genetic models for coeval, spatially related (Huangshandong and Huangshanxi) Central Asian orogenic belt using whole-rock C isotopes S/Se ratios, mineral isotopes, calculated fO2. The ratios range from 3,085 7,372, overlapping slightly higher than mantle (3,250 ± 400). δ34S values...
Using in-situ synchrotron X-ray scattering, we show that the structural evolution of various bulk metallic glass-forming liquids can be quantitatively connected to their viscosity behavior in supercooled liquid near Tg. The signature fragility is identified as temperature dependence local dilatation on distinct key atomic length scales. A more fragile results from a pronounced thermally induced structure scale about 3 4 diameters, coupled with shallower changes nearest neighbor environment....
Copper manganese composite (hopcalite) catalyst has been widely explored for low-temperature CO oxidation reactions. However, the previous reports on stabilization of such catalysts have shown that they deactivated severely under moist conditions. Herein, we developed an α-MnO2 nanorod-supported copper oxide is very active and stable conditions with or without moisture by deposition precipitation (DP) method. Incredibly, CuO/MnO2 DP (with 5 wt % loading) achieves superior activity a reaction...
For decades, it is fairly controversial whether the active gold sites in catalyzing CO oxidation reaction are metallic or positively charged. Herein, catalysts with either charged were separately prepared by deposition–precipitation method same type of TiO2 matrix. The catalytic behaviors observed for two catalysts. initially inactive Aun+/TiO2 (1 < n 3) catalyst, situ diffuse-reflectance infrared Fourier transform spectroscopy (in DRIFTS) exhibited that induced transformation from Aun+ to...