A5101549559- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Advanced Condensed Matter Physics
- Magnetic properties of thin films
- Multiferroics and related materials
- Semiconductor materials and devices
- Advanced Photocatalysis Techniques
- Molecular Junctions and Nanostructures
- Electrocatalysts for Energy Conversion
- Electron and X-Ray Spectroscopy Techniques
- 2D Materials and Applications
- ZnO doping and properties
- Surface and Thin Film Phenomena
- Graphene research and applications
- Quantum Dots Synthesis And Properties
- MXene and MAX Phase Materials
- Supercapacitor Materials and Fabrication
- Perovskite Materials and Applications
- Quantum and electron transport phenomena
- Advanced X-ray Imaging Techniques
- Advancements in Battery Materials
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Physics of Superconductivity and Magnetism
- X-ray Spectroscopy and Fluorescence Analysis
National University of Singapore
2016-2025
Nanjing University of Information Science and Technology
2024
Xi'an University of Technology
2013
Air Force Medical University
2012
National Institute for Materials Science
2010
Hong Kong University of Science and Technology
2002-2010
University of Hong Kong
2002-2010
University of Würzburg
2008-2009
University of Science and Technology of China
1995-2007
National Synchrotron Radiation Laboratory
1995-2007
Molybdenum disulphide, a diamagnetic layered dichalcogenide solid, is found to show magnetic ordering at room temperature when exposed 2 MeV proton beam. The dependence of magnetization displays ferrimagnetic behavior with Curie 895 K. A disorder mode corresponding zone-edge phonon and Mo valence higher than +4, have been detected in the irradiated samples using Raman X-ray photoelectron spectroscopy, respectively. possible origins long-range MoS2 are discussed.
The realization of long-range magnetic ordering in 2D systems can potentially revolutionize next-generation information technology. Here, the successful fabrication crystalline Cr3 Te4 monolayers with room temperature (RT) ferromagnetism is reported. Using molecular beam epitaxy, growth films monolayer thickness demonstrated at low substrate temperatures (≈100 °C), compatible Si complementary metal oxide semiconductor X-ray circular dichroism measurements reveal a Curie (Tc ) v344 K for an...
The universal linear scaling relationships between the adsorption energies of reactive intermediates limit performance catalysts in multi-step catalytic reactions. Here, we show how these can be circumvented electrochemical oxygen evolution reaction by dynamic structural regulation active sites. We construct a model Ni-Fe2 molecular catalyst via situ activation, which is able to deliver notable intrinsic activity. Theoretical calculations and electrokinetic studies reveal that Ni-adsorbate...
There have been several recent conflicting reports on the ferromagnetism of clean monolayer VSe2 . Herein, controllable formation 1D defect line patterns in vanadium diselenide (VSe2 ) monolayers initiated by thermal annealing is presented. Using scanning tunneling microscopy and q-plus atomic force techniques, features are determined to be 8-member-ring arrays, formed via a Se deficient reconstruction process. The reconstructed with Se-deficient defects displays room-temperature under X-ray...
Abstract The design of MoS 2 ‐based electrocatalysts with exceptional reactivity and robustness remains a challenge due to thermodynamic instability active phases catalytic passiveness basal planes. This study details viable in situ reconstruction zinc–nitrogen coordinated cobalt–molybdenum disulfide from structure directing metal–organic framework (MOF) constitute specific heteroatomic coordination surface ligand functionalization. Comprehensive experimental spectroscopic studies...
Abstract Mesoporous carbon nitrides with C 3 N 5 and 6 stoichiometries created a new momentum in the field of organic metal‐free semiconductors owing to their unique band structures high basicity. Here, we report on preparation novel graphitic microporous nitride tetrazine based chemical structure composition 5.4 using ultra‐stable Y zeolite as template aminoguanidine hydrochloride, nitrogen‐containing molecule, CN precursor. Spectroscopic characterization density functional theory...
Porous boron carbon nitride (BCN) is one of the exciting systems with unique electrochemical and adsorption properties. However, synthesis low-cost porous BCN tunable porosity challenging, limiting its full potential in a variety applications. Herein, preparation well-defined mesoporous (MBCN) high specific surface area, pores, nitrogen contents demonstrated through simple integration chemical polymerization readily available sucrose borane ammonia complex (BAC) nano-hard-templating...
Biomass-derived nanoporous carbons (BNCs) are attractive materials for CO2 capture and energy storage due to their unique surface properties the availability of low-cost abundant supply carbon sources. However, order atoms, nature porosity functional groups critical in dictating performance BNCs such applications. Herein, a solid-phase activation strategy is introduced prepare O-functionalized with embedded graphene-like structures using d(+)-glucose as precursor. The optimised material...
Abstract The electrosynthesis of hydrogen peroxide (H 2 O ) via two‐electron (2 e − oxygen (O reduction reaction (ORR) has great potential to replace the traditional energy‐intensive anthraquinone process, but design low‐cost and highly active selective catalysts is greatly challenging for long‐term H production under industrial relevant current density, especially neutral electrolytes. To address this issue, work constructed a carboxylated hexagonal boron nitride/graphene ( h ‐BN/G)...
Solar carbon dioxide (CO
Topotactic reduction utilizing metal hydrides as reagents has emerged an effective approach to achieve exceptionally low oxidization states of ions and unconventional coordination networks. This method opens avenues the development entirely new functional materials, with one notable example being infinite-layer nickelate superconductors. However, effect on atomic reconstruction electronic structures-crucial for superconductivity-remains largely unresolved. We designed two sets control...
Transition metal oxides have a range of unique properties due to coupling charge, spin, orbital and lattice degrees freedom nearly degenerate multiple ground states. These make them interesting for applications fundamental investigations. Here we report new phase with abnormal transport anisotropy in La(0.7)Sr(0.3)MnO3 ultra-thin films under large tensile strain. This is absent smaller strain or compressive Furthermore, thickness magnetic-field-dependent experiments suggest that the...
Abstract 2D transition metal dichalcogenides have attracted much attention in the field of spintronics due to their rich spin‐dependent properties. The promise highly compact and low‐energy‐consumption spin‐orbit torque (SOT) devices motivates search for structures materials that can satisfy requirements giant perpendicular magnetic anisotropy (PMA) large SOT simultaneously SOT‐based memory. Here, it is demonstrated PMA a heavy metal/transition ferromagnet structure, Pt/[Co/Ni] 2 , be...
Abstract The Rashba effect plays important roles in emerging quantum materials physics and potential spintronic applications, entailing both the spin orbit interaction (SOI) broken inversion symmetry. In this work, we devise asymmetric oxide heterostructures of LaAlO 3 //SrTiO /LaAlO (LAO//STO/LAO) to study STO with an initial centrosymmetric structure, symmetry is created by inequivalent bottom top interfaces due their opposite polar discontinuities. Furthermore, report observation a...
The growth of entirely synthetic two-dimensional (2D) materials could further expand the library naturally occurring layered solids and provide opportunities to design with finely tunable properties. Among them, synthesis elemental 2D is particular interest as they represent chemically simplest case serve a model system for exploring on-surface mechanism. Here, pure atomically thin blue phosphorus (BlueP) monolayer synthesized via silicon intercalation BlueP–Au alloy on Au(111). process...
Abstract Transition metal oxides exhibit strong structure-property correlations, which has been extensively investigated and utilized for achieving efficient oxygen electrocatalysts. However, high-performance oxide-based electrocatalysts hydrogen evolution are quite limited, the mechanism still remains elusive. Here we demonstrate correlations between electronic structure electrocatalytic activity within a single oxide system Ti 2 O 3 . Taking advantage of epitaxial stabilization,...
In this study, we report on the synthesis of a hierarchical carbon structure embedded with micro- and meso-pores through unique one-pot that synergistically integrates hard-templating method using KIT-6 template an activation process ZnCl2 reagent. As source, use soft drink is rich in sugar up-convert industrial waste into value-added product for series energy systems. Nitrogen adsorption results confirm optimized material exhibits larger specific surface area (2003 m2 g−1) than only...
Abstract Hybrid ion capacitors (HIC) are receiving a lot of attention due to their potential achieve high energy and power densities, but they remain insufficient. It is imperative explore outstanding environmentally benign electrode materials high‐performing HIC systems. Here, unique boron carbon nitride (BCN)‐based system that comprises microporous BCN structure Fe 1−x S nanoparticle incorporated nanosheets ( BNF ) as cathode anode, respectively reported. The prepared through facile...
Abstract Perovskite manganites are viewed as one of the key building blocks oxide spintronics devices due to their attractive physical properties. However, cation off‐stoichiometry at epitaxial interfaces between and other materials can lead interfacial dead layers, severely reducing device performance. Here, transmission electron microscopy synchrotron‐based spectroscopy used demonstrate that oxygen vacancies during growth serve a critical factor for modifying stoichiometry in pulsed laser...