A5101596406- Advanced X-ray Imaging Techniques
- Magnetic and transport properties of perovskites and related materials
- Transition Metal Oxide Nanomaterials
- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Perovskite Materials and Applications
- Ga2O3 and related materials
- Advanced Electron Microscopy Techniques and Applications
- Digital Holography and Microscopy
- Gas Sensing Nanomaterials and Sensors
- Acoustic Wave Resonator Technologies
- Optical measurement and interference techniques
- Advanced Condensed Matter Physics
- ZnO doping and properties
- X-ray Spectroscopy and Fluorescence Analysis
- Electrocatalysts for Energy Conversion
- CO2 Reduction Techniques and Catalysts
- Optical properties and cooling technologies in crystalline materials
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Advanced Thermoelectric Materials and Devices
- Electronic and Structural Properties of Oxides
- Spectroscopy and Quantum Chemical Studies
- Block Copolymer Self-Assembly
- Covalent Organic Framework Applications
European Synchrotron Radiation Facility
2025
University of Science and Technology Liaoning
2024
Southern University of Science and Technology
2022-2024
Deutsches Elektronen-Synchrotron DESY
2023
National Synchrotron Radiation Laboratory
2016-2022
University of Science and Technology of China
2016-2022
Hefei National Center for Physical Sciences at Nanoscale
2018-2022
The First Affiliated Hospital, Sun Yat-sen University
2021
Zhongshan Hospital
2021
Fudan University
2014-2021
Tuning the surface strain of heterogeneous catalysts represents a powerful strategy to engineer their catalytic properties by altering electronic structures. However, clear and systematic understanding effect in electrochemical reduction carbon dioxide is still lacking, which restricts use as tool optimize performance electrocatalysts. Herein, we demonstrate CO2 using Pd octahedra icosahedra with similar sizes well-defined platform. The icosahedra/C catalyst shows maximum Faradaic efficiency...
For the first time, we report herein bottom-up fabrication of a conductive nickel phthalocyanine-based 2D MOF and use it as highly active electrocatalyst for OER (overpotential < 250 mV) without further pyrolysis or adding materials, which can facilitate development MOFs energy applications.
All-inorganic cesium lead halide perovskite nanocrystals have emerged as attractive optoelectronic nanomaterials owing to their stabilities and highly efficient photoluminescence. However, the inorganic perovskites of CsPbBr3 synthesized by solution method often suffer from byproducts such Cs4PbBr6 CsPb2Br5. Herein, we investigated thoroughly solvent-related effect on phase formation in CsBr–PbBr2 system through single crystal X-ray diffraction measurement. It is found that prepared product...
Abstract Mechanism of metal-insulator transition (MIT) in strained VO 2 thin films is very complicated and incompletely understood despite three scenarios with potential explanations including electronic correlation (Mott mechanism), structural transformation (Peierls theory) collaborative Mott-Peierls transition. Herein, we have decoupled coactions phase transitions across the MIT by implementing epitaxial strain on 13-nm-thick (001)-VO comparison to thicker films. The evolution during...
Abstract Tuning the surface strain of heterogeneous catalysts represents a powerful strategy to engineer their catalytic properties by altering electronic structures. However, clear and systematic understanding effect in electrochemical reduction carbon dioxide is still lacking, which restricts use as tool optimize performance electrocatalysts. Herein, we demonstrate CO 2 using Pd octahedra icosahedra with similar sizes well‐defined platform. The icosahedra/C catalyst shows maximum Faradaic...
Abstract Instability of emerging perovskite organometallic halide in humidity environment is the biggest obstacle for its potential applications solar energy harvest and electroluminescent display. Understanding detailed decay mechanism these materials moisture a critical step towards final appropriate solutions. As model study presented this work, situ synchrotron radiation x-ray diffraction was combined with microscopy gravimetric analysis to degradation process CH 3 NH PbI results reveal...
A novel ultrahigh-resolution x-ray microscope achieves 8-nm spatial resolution and accurately maps chemistry in nanomaterials.
We report a room-temperature colloidal synthesis of few-unit-cell-thick CsPbBr3 QWs with lengths over hundred nanometers. The surfactant-directed oriented attachment growth mechanism was proposed to explain the formation such QWs. Owing strong quantum confinement effect, photoluminescence (PL) emission peak blue-shifted 430 nm. ensemble PL yield (PLQY) increased 21.13% through simple heat-treatment process. improvement PLQY ascribed reduction density surface trap states and defect induced by...
Coherent diffraction imaging (CDI) is an alternative way to achieve high-performance without high-quality lenses. modulation (CMI) improves CDI's algorithmic convergence and applicability general samples. A high degree of coherence the source essential for CDI, which limits its application ultrafast pulsed sources with intrinsically broad spectrum. Here, we propose algorithm increase tolerance CMI low temporal that tandemly employs Wiener Lucy deconvolution approaches. Simulations visible...
Understanding the big discrepancy in photoluminesence quantum yields (PLQYs) of nanoscale colloidal materials with varied morphologies is great significance to its property optimization and functional application. Using different shaped CsPbBr3 nanocrystals same fabrication processes as model, quantitative synchrotron radiation X-ray diffraction analysis reveals increasing trend lattice strain values nanocrystals: nanocube, nanoplate, nanowire. Furthermore, transient spectroscopic...
The crystalline phases and domain configuration in the morphotropic phase boundary composition Pb(Mg1/3Nb2/3)O3-0.34PbTiO3 (PMN-0.34PT) single crystal have been investigated by synchrotron-based X-ray 3D Reciprocal Space Mapping (3D-RSM) Piezoresponse Force Microscopy. coexistence of tetragonal (T) monoclinic MC this PMN-0.34PT is confirmed. affiliation each diffraction spot 3D-RSM was identified with assistance qualitative simulation. Most importantly, twinning structure between different...
<title>Abstract</title> Ptychography has gained significant prominence at synchrotron facilities globally for characterizing the topological structure and intricate properties of biological material specimens nanometer or atomic scale. Its high-resolution potential relies on accurate scan position information, substantial overlap ratio, a stable probe; however, fulfilling these requirements becomes increasingly challenging as resolution approaches scales. This paper proposes multiple-shot...
Wafer-scale epitaxial and textured polymorphs of vanadium oxide thin films on low-cost sapphire substrates enable real applications.
The monoclinic (M) phases in high-performance relaxor-based ferroelectric single crystals have been recognized to be a vital structural factor for the outstanding piezoelectric property. However, due complexity of structure M phases, understanding about it is still limited. In this paper, local twin domains and tip-voltage-induced domain switching ${\mathrm{M}}_{C}$ phase...
Since Morin discovered that vanadium dioxide $(\mathrm{V}{\mathrm{O}}_{2})$ undergoes a reversible and dramatic structural phase transition coupled with an abrupt metal-insulator transition, extensive attention has been paid to $\mathrm{V}{\mathrm{O}}_{2}$ due its importance in fundamental condensed state physics potential technological applications. Here, we observed the precipitated phases of (insulating metallic polymorphs) could be controlled by relaxing dimerization vanadium-vanadium...
Hydrogenation, an effective way to tune the properties of transition metal oxide (TMO) thin films, has been long awaited be performed safely and without external energy input. Recently, metal-acid-TMO reported approach for hydrogenation, but requirement acid limits its application. In this work, reversible rapid hydrogen doping WO3 in NaOH(aq) | Al(s) WO3(s) is revealed by structural electrical measurements. Accompanied phase identified situ X-ray diffraction, electric resistance film found...
In this work, a one-step solution-processing approach was purposed and demonstrated for the dehydration condensation between organic components of 2D hybrid perovskite (HOOC–CH2–NH3)2PbI4 (abbreviated as Gly2PbI4). The novel product obtained after (labeled Gly2PbI4-DCC) shows greatly enhanced stability without any obvious degradation in accelerated moisture-tolerance test. XPS reveals strong covalent bonds formed adjacent −COOH −NH3+ terminal groups. XRD, SEM, TEM, test results show that...
Vanadium dioxide (VO2) epitaxial films were grown on perovskite single-crystal strontium titanate (SrTiO3) substrates by reactive radio-frequency magnetron sputtering. The growth temperature-dependent metal–insulator transition (MIT) behavior of the VO2 was then investigated. We found that order magnitude resistance change across MIT increased from 102 to 104 with increasing temperature. In contrast, temperature does not strongly depend and is fairly stable at about 345 K. On one hand,...