A5100645388- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Electronic and Structural Properties of Oxides
- Acoustic Wave Resonator Technologies
- Magnetic and transport properties of perovskites and related materials
- Photonic and Optical Devices
- MXene and MAX Phase Materials
- Crystallization and Solubility Studies
- Perovskite Materials and Applications
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- Ferroelectric and Negative Capacitance Devices
- Metal and Thin Film Mechanics
- Optical Coatings and Gratings
- Organic and Molecular Conductors Research
- Solid-state spectroscopy and crystallography
- 2D Materials and Applications
- Electrocatalysts for Energy Conversion
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and devices
- Advanced battery technologies research
- Advanced Thermoelectric Materials and Devices
- Boron and Carbon Nanomaterials Research
- Semiconductor Quantum Structures and Devices
- BIM and Construction Integration
Chongqing University
2023-2025
Jinan University
2020-2024
Institut Català de Nanociència i Nanotecnologia
2021-2024
The University of Sydney
2019-2024
Chinese Academy of Sciences
2015-2024
Shaanxi University of Science and Technology
2022-2024
Inner Mongolia University
2023-2024
Changchun Institute of Optics, Fine Mechanics and Physics
2016-2024
Jiangsu University
2024
Sichuan University
2024
Lead halide perovskite (LHP) semiconductors with the general chemical formula ABX<sub>3</sub> are now being widely investigated for a variety of applications including but not limited to high-efficiency photovoltaics (PVs) and light-emitting diodes (LEDs).
Abstract Electron modulation presents a captivating approach to fabricate efficient electrocatalysts for the oxygen evolution reaction (OER), yet it remains challenging undertaking. In this study, an effective strategy is proposed regulate electronic structure of metal–organic frameworks (MOFs) by construction MOF‐on‐MOF heterogeneous architectures. As representative architectures, MOF‐74 on MOF‐274 hybrids are in situ prepared 3D metal substrates (NiFe alloy foam (NFF)) via two‐step...
The properties of two-dimensional (2D) materials such as graphene and monolayer transition metal dichalcogenides are strongly influenced by domain boundaries. Ultrathin carbides a class newly emerging 2D that superconducting have many potential applications in electrochemical energy storage, catalysis, thermoelectric conversion. However, little is known about their structure the influence boundaries on properties. Here we use atomic-resolution scanning transmission electron microscopy...
Although elastic strains, particularly inhomogeneous are able to tune, enhance or create novel properties of some nanoscale functional materials, potential devices dominated by strains have not been achieved so far. Here we report a fabrication with linear gradient as giant 106 per metre, featuring an extremely lower energy cost compared uniformly strained state. The present strain gradient, resulting from the disclinations in BiFeO3 nanostructures array grown on LaAlO3 substrates via high...
Nanoscale small-volume metallic materials typically exhibit high strengths but often suffer from a lack of tensile ductility due to undesirable premature failure. Here, we report unusual room-temperature uniform elongation up ~110% at flow stress 0.6-1.0 GPa in single-crystalline <110>-oriented CoCrFeNi high-entropy alloy nanopillars with well-defined geometries. By combining high-resolution microscopy and large-scale atomistic simulations, reveal that this ultrahigh is attributed spatial...
Electron ptychography, recognized as an ideal technique for low-dose imaging, consistently achieves deep sub-angstrom resolution at electron doses of several thousand electrons per square angstrom (e−/Å2) or higher. Despite its proven efficacy, the application ptychography even lower doses—necessary materials highly sensitive to beams—raises questions regarding feasibility and attainable under such stringent conditions. Herein, we demonstrate implementation near-atomic-resolution ( ~ 2 Å)...
Ferroelectrics hold promise for sensors, transducers, and telecommunications. With the demand of electronic devices scaling down, they take form nanoscale films. However, polarizations in ultrathin ferroelectric films are usually reduced dramatically due to depolarization field caused by incomplete charge screening at interfaces, hampering integrations ferroelectrics into electric devices. Here, we design fabricate a ferroelectric/multiferroic PbTiO3/BiFeO3 system, which exhibits...
In the archetypal antiferroelectric ${\mathrm{PbZrO}}_{3}$, antiparallel electric dipoles cancel each other, resulting in zero spontaneous polarization at macroscopic level. Yet actual hysteresis loops, cancellation is rarely perfect and some remnant often observed, suggesting metastability of polar phases this material. work, using aberration-corrected scanning transmission electron microscopy methods on a ${\mathrm{PbZrO}}_{3}$ single crystal, we uncover coexistence common phase...
It remains a grand challenge to amplify the chiroptical activity of chiral metal nanoclusters (NCs) although it is desirable for fundamental research and practical application. Herein, we report strategy surface/interface solidification (SIS) enhancing gold NCs. Structural analysis [Au19(2R,4R/2S,4S-BDPP)6Cl2]3+ (BDPP 2,4-bis(diphenylphosphino)pentane) clusters reveals that one interfacial atoms flexible between two sites large space present on surface, thus hampering chirality transfer from...
Ferroelectric flux-closures are very promising in high-density storage and other nanoscale electronic devices. To make the data bits addressable, required to be periodic via a controlled growth. Although flux-closure quadrant arrays with 180° domain walls perpendicular interfaces (V-closure) have been observed strained ferroelectric PbTiO3 films, quadrants therein rather asymmetric. In this work, we report not only array of symmetric parallel (H-closure) but also large scale alternative...
Diamond is known to possess a range of extraordinary properties that include exceptional mechanical stability. In this work, it demonstrated nanoscale diamond pillars can undergo not only elastic deformation (and brittle fracture), but also new form plastic depends critically on the nanopillar dimensions and crystallographic orientation diamond. The be explained by emergence an ordered allotrope carbon termed O8-carbon. phase predicted simulations dynamics, which show how sp3 bonds...
Abstract Plastic deformation in ceramic materials is normally only observed nanometre-sized samples. However, we have high levels of plasticity (>50% plastic strain) and excellent elasticity (6% elastic perovskite oxide Pb(In 1/2 Nb )O 3 -Pb(Mg 1/3 2/3 -PbTiO , under compression along <100> pc pillars up to 2.1 μm diameter. The extent this much higher than has previously been reported for materials, the sample size at which almost an order magnitude larger. Bending tests also...
The high sensitivity detection of chirality is great importance in fields physics, biology, and life sciences. Emerging strategies attempt to generate the superchiral with metasurfaces maximize chiral light-matter interaction. Although these studies have mostly considered transverse superchirality, longitudinal optical also plays a very important role interactions. In this paper, conditions for generating optimal superchirality are demonstrated vector diffraction theory. Accordingly,...
Ferroelectricity is generally deteriorated or even vanishes when the ferroelectric films are downsized to unit cell scale. To maintain and enhance polarization in nanoscale ferroelectrics of scientific technological importance. Here, giant sustainability reported a series ultrathin PbTiO3 scaled down three cells grown on NdGaO3 (110) substrates with La0.7 Sr0.3 MnO3 as bottom electrodes. Atomic mappings via aberration-corrected scanning transmission electron microscopy demonstrate robust...
Abstract Doped BaSnO 3 has arisen many interests recently as one of the promising transparent conducting oxides for future applications. Understanding microstructural characteristics are crucial exploration relevant devices. In this paper, we investigated features 0.001% La doped thin film using both conventional and aberration corrected transmission electron microscopes. Contrast analysis shows high densities Ruddlesden-Popper faults in film, which on {100} planes with translational...
Flux-closure domain structures in ferroelectric thin films are considered to have potential applications electronic devices. It is usually believed that these stabilized by the depolarization field and contact with electrodes tends screen may limit their formation. In this work, influence of oxide (SrRuO3 La0.7Sr0.3MnO3) on formation flux-closure domains PbTiO3 deposited (110)-oriented GdScO3 substrates pulsed laser deposition was investigated Cs-corrected transmission electron microscopy....
Abstract [111]‐Oriented perovskite oxide films exhibit unique interfacial and symmetry breaking effects, which are promising for novel quantum materials as topological insulators polar metals. However, due to strong mismatch complex structural reconstructions on (111) surfaces/interfaces, it is still challenging grow high quality [111] heterostructures, let alone explore the as‐resultant physical properties. Here, fabrication of ultrathin PbTiO 3 grown a SrTiO substrate with atomically...