A5101622633- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- ZnO doping and properties
- Advanced Memory and Neural Computing
- Electronic and Structural Properties of Oxides
- Perovskite Materials and Applications
- Ferroelectric and Negative Capacitance Devices
- Acoustic Wave Resonator Technologies
- Advancements in Battery Materials
- 2D Materials and Applications
- Ga2O3 and related materials
- Semiconductor materials and devices
- Advanced Photocatalysis Techniques
- Advanced Battery Materials and Technologies
- Supercapacitor Materials and Fabrication
- Transition Metal Oxide Nanomaterials
- Magnetic and transport properties of perovskites and related materials
- Advanced Sensor and Energy Harvesting Materials
- MXene and MAX Phase Materials
- Diamond and Carbon-based Materials Research
- Gas Sensing Nanomaterials and Sensors
- Dielectric materials and actuators
- Chalcogenide Semiconductor Thin Films
- Metal and Thin Film Mechanics
- Conducting polymers and applications
Xiangtan University
2016-2025
Shandong Yingcai University
2022
South China Normal University
2022
Beijing University of Agriculture
2018
Xidian University
2016
National Taipei University of Technology
2014
Xi'an Institute of Optics and Precision Mechanics
2014
Lanzhou University
2014
Institute of Modern Physics
2006-2010
National Institute for Materials Science
2007-2008
Laser-induced graphene (LIG) is a simple, environmentally friendly, efficient, and less costly method, as well can form various shapes on flexible substrate in situ without the use of masks. More importantly, it tune work function LIG easily by changing laser parameters to control transportation carriers. In this work, functions were controlled adjusting frequency or speed laser, series LIG/GaOx Schottky photodetectors formed. When increases, Fermi energy shifted below crossing point Π Π*...
Raman scattering has been used to study the influence of manganese, an effective dopant obtain ZnO diluted magnetic semiconductors, on lattice dynamics ZnO. It is found that Mn doping increases defects and induces two vibration modes 275 526cm−1. On other hand, high temperature (TC higher than 350K) ferromagnetism observed in Zn1−xMnxO (x⩽0.02) nanoparticles. nanoparticles strongly related
Nano-crystalline diamond is prepared with a unique method in which graphite target etched by high-power pulsed laser water. Transmission electron microscopy (TEM) and high resolution (HREM) indicate nano-crystalline obtained, having hexagonal lattice or cubic lattice.
Uniform yolk–shell V2O5 microspheres were synthesized via a facile template-free solvothermal route and subsequent calcination treatment in air. The resulting cathode materials showed high specific capacity of 220 mA h g−1 after 30 cycles good rate capability.
Lead halide perovskite solar cells have recently emerged as a very promising photovoltaic technology due to their excellent power conversion efficiencies; however, the toxicity of lead and poor stability materials remain two main challenges that need be addressed. Here, for first time, we report lead-free, highly stable C6H4NH2CuBr2I compound. The films exhibit extraordinary hydrophobic behavior with contact angle ∼90°, X-ray diffraction patterns unchanged even after 4 h water immersion....
Mesoporous interconnected carbon-encapsulated Fe3O4 (Fe3O4@C) nanospheres assembled from tiny nanoparticle subunits have been synthesized by a one-pot solvothermal decomposition route followed thermal annealing. Electrochemical characterization of these Fe3O4@C exhibits capacity 636 mA h g−1 at 0.2–1 C over 50 cycles when employed as anode materials in Li-ion batteries.
Learning fine-grained image similarity is a challenging task. It needs to capture between-class and within-class differences. This paper proposes deep ranking model that employs learning techniques learn metric directly from images.It has higher capability than models based on hand-crafted features. A novel multiscale network structure been developed describe the images effectively. An efficient triplet sampling algorithm proposed with distributed asynchronized stochastic gradient. Extensive...
The toxicity and the instability of lead-based perovskites might eventually hamper commercialization perovskite solar cells. Here, we present optoelectronic properties stability a two-dimensional layered (C6H5CH2NH3)2CuBr4 perovskite. This material has low Eg 1.81 eV high absorption coefficient ∼1 × 105 cm–1 at most intensive 539 nm, implying that it is suitable for light-harvesting in thin film cells, especially tandem Furthermore, X-ray diffraction (XRD), ultraviolet–visible (UV–vis)...
Nontrivial topological structures offer a rich playground in condensed matters and promise alternative device configurations for post-Moore electronics. While recently number of polar topologies have been discovered confined ferroelectric PbTiO
Neuromorphic computing has the potential to accelerate high performance parallel and low power in-memory computation, artificial intelligence, adaptive learning. Despite emulating basic functions of biological synapses well, existing electronic synaptic devices have yet match softness, robustness, ultralow consumption brain. Here, we demonstrate an all-inorganic flexible synapse enabled by a ferroelectric field effect transistor based on mica. The device not only exhibits excellent...
Room-temperature polar skyrmions, which have been recently discovered in oxide superlattice, received considerable attention for their potential applications nanoelectronics owing to nanometer size, emergent chirality, and negative capacitance. For practical applications, manipulation using external stimuli is a prerequisite. Herein, we study the dynamics of individual skyrmions at nanoscale via situ scanning transmission electron microscopy. By monitoring electric-field-driven creation,...
By modifying the device itself, for instance by Al doping, frequency threshold range of WO x -based memristive synapses is increased.
Raman scattering has been used to study the influence of nitrogen, a potential acceptor in ZnO, on lattice dynamics ZnO. It is found that N+ implantation increased disorder and induced some vibration modes be active at 275, 504, 644cm−1, respectively. Based theoretical experimental study, origin additional peak about 275cm−1 attributed Zn atoms, where part its first nearest neighbor O atoms are replaced by N crystal lattice.
The ability to controllably manipulate complex topological polar configurations such as flux-closures via external stimuli may allow the construction of new electromechanical and nanoelectronic devices. Here, using atomically resolved in situ scanning transmission electron microscopy, we find that PbTiO3/SrTiO3 superlattice films are mobile can be reversibly switched ordinary single ferroelectric c or a domains under an applied electric field stress. Specifically, initially drives movement...
Abstract Flexible ferroelectric field effect transistors (FeFETs) with multiple functionalities and tunable properties are attractive for low power sensing, nonvolatile data storage, as well emerging memristor applications such artificial synapses, though the state‐of‐art flexible FeFETs based on organic materials possess polarization, large coercivity, high operating voltage, suffer from poor thermal stability. Here, developed is an all‐inorganic FeFET epitaxial Pb(Zr 0.1 Ti 0.9 )O 3 /ZnO...
Abstract Topologically nontrivial polar structures are not only attractive for high-density data storage, but also ultralow power microelectronics thanks to their exotic negative capacitance. The vast majority of emerging naturally in ferroelectrics, however, topologically trivial, and there enormous interests artificially engineered possessing topology. Here we demonstrate reconstruction trivial strip-like domain architecture into arrays vortex (PbTiO 3 ) 10 /(SrTiO superlattice,...
Multiferroic xBi3.15Nd0.85Ti3O12–(1−x)CoFe2O4 composite thin films with x=0.5, 0.6, and 0.7 were fabricated on Pt∕Ti∕SiO2∕Si(100) substrates by a chemical solution deposition technique. X-ray diffraction shows that there are no other phases but bismuth-layered perovskite Bi3.15Nd0.85Ti3O12 spinel CoFe2O4 in the films. Scanning electron microscopy reveals aggregates locally into nanoparticles embeds matrix. The exhibit both good ferroelectric magnetic properties at room temperature, as well...
Mn-doped ZnO nanorods are prepared by a chemical vapor deposition method using zinc and MnO2 powders as source materials of Zn Mn, respectively. Cathodoluminescence (CL) characterization indicates that the grown at different growth temperatures have oxygen vacancy concentrations. Room temperature ferromagnetism with saturation magnetization 0.87μB∕Mn has been observed in 650°C, which moderate concentration is CL characterization. It also found vacancies play an important role appearance room...
Self-assembled porous hierarchical-like CoO@C nanoarchitectures have been fabricated on a large scale through facile solution-phase process and subsequent annealing of the inorganic–organic Co(OH)2–DS (dodecyl sulphate) precursor nanocomposites. The as-formed nanohybrid as an anode material for lithium-ion batteries can exhibit not only highly reversible capacity but also excellent cycling performance well good rate capability. Results show that these hierarchical microsheets made...
Ultralong SnS2 nanobelts with a high production yield up to ∼98% were synthesized via gram-scale and template-free solvothermal route. The synthetic mechanism of these intriguing ultralong was proposed be from the synergetic effect layered CdI2-type structure surface-modification capping reagent dodecanethiol. resulting showed specific capacity 640 mA h g−1 stable cycling ability (560 after 50 cycles), which is much better than graphite anode.