A5100660433- Dielectric materials and actuators
- Semiconductor Quantum Structures and Devices
- GaN-based semiconductor devices and materials
- Advanced Sensor and Energy Harvesting Materials
- Synthesis and properties of polymers
- Luminescence Properties of Advanced Materials
- Glass properties and applications
- Polymer composites and self-healing
- Advancements in Battery Materials
- Quantum Dots Synthesis And Properties
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Advanced battery technologies research
- Ga2O3 and related materials
- Nanoplatforms for cancer theranostics
- Advanced Nanomaterials in Catalysis
- Semiconductor materials and devices
- ZnO doping and properties
- Radiation Detection and Scintillator Technologies
- Covalent Organic Framework Applications
- Spectroscopy and Laser Applications
- Thin-Film Transistor Technologies
- Silicon and Solar Cell Technologies
- Solid-state spectroscopy and crystallography
- Extraction and Separation Processes
Hunan University
2024
University of Science and Technology Beijing
2011-2024
National University of Defense Technology
2023
Northeast Forestry University
2022-2023
Guangxi Normal University
2019-2022
Shenzhen Institutes of Advanced Technology
2022
Xiamen University
2017-2020
Central South University
2016-2019
Nankai University
2004
Oklahoma State University
1988-1996
ZIF-8, as an important photoresponsive metal–organic framework (MOF), holds great promise in the field of cancer theranostics owing to its versatile physiochemical properties. However, photocatalytic anticancer application is still restricted because wide bandgap and specific response ultraviolet light. Herein, we developed lanthanide-doped nanoparticles (LDNPs) coated with Fe/Mn bimetal-doped ZIF-8 (LDNPs@Fe/Mn-ZIF-8) for second near-infrared (NIR-II) imaging-guided synergistic...
The interband transitions in single-crystal GaN films grown by metalorganic chemical vapor deposition (MOCVD) have been studied as a function of temperature (15≤T≤300 K) reflectance and photoluminescence measurements. At low temperatures, well-resolved spectral features corresponding to the band structure were observed. energies excitonic ΓV9−ΓC7,ΓV7 (upper band)−ΓC7 ΓV7(lower are found be 3.485, 3.493, 3.518 eV at 15 K, respectively, for MOCVD GaN. broadened shift lower energy increases....
To suppress capacity fading of nickel-rich materials for lithium-ion batteries, a homogeneous Al3+ doping strategy is realized through tailoring the diffusion path from bulk surface to interior. Specifically, layered LiNi0.88Co0.095Mn0.025O2 cathode with radial arrangement primary grains successfully synthesized optimization design precursors. The follows radially oriented into by introduction nano-Al2O3 during sintering process, realizing distribution in whole material. Particularly, series...
Dielectric polyimides (PIs) are ubiquitous as insulation in electrical power systems and electronic devices. Generally, dynamic polyimide is required to solve irreversible failure processes of or mechanical damage, for example, under high temperature, pressure, field strength. The challenge lies the design molecular structure rigid achieve reversibility. Herein, a low-molecular-weight gene unit designed crosslink with ligase prepare smart film. Interestingly, due variability combinations,...
Recyclability and self‐healing are two most critical factors in developing sustainable polymers to deal with environmental pollution resource waste. In this work, a dynamic cross‐linked polyimide insulation film full closed‐loop recyclability is successfully prepared, which also possesses good ability after being mechanical/electrical damaged depending on the Schiff base covalent bonds. The recycled self‐healed still maintain its tensile strength ( σ t ) >60 MPa Young's modulus E >4...
Abstract Polyimides (PIs) used in advanced electrical and electronic devices can be electrically/mechanically damaged, resulting a significant waste of resources. Closed‐loop chemical recycling may prolong the service life synthetic polymers. However, design dynamic covalent bonds for preparing chemically recyclable crosslinked PIs remains challenging task. Herein, new PI films containing oligomer, chain extender, crosslinker are reported. They exhibit superior recyclability excellent...
Abstract Polymer dielectrics with combined thermal stability and self‐healing properties are specifically desired for high‐temperature film capacitors. The high of conventional polymers benefits from the abundance aromatic rings in molecule backbone, but carbon content sacrifices their properties. Here, analicyclic polyimide a glass transition temperature (256 °C) wide energy bandgap (4.58 eV) is designed, which exhibits electric conductivity more than an order magnitude lower that classical...
Optically pumped near ultraviolet lasing from single-crystal GaN grown by metalorganic chemical vapor deposition has been achieved over a temperature range 10 K to 375 using side-pumping geometry on small barlike samples. The laser emission threshold was measured as function of and the found show weak dependence: ∼500 kW/cm2 at ∼800 room (295 K) for one particular sample studied. longitudinal modes were clearly observed. characteristics dependence suggests that is suitable material...
In the authors' previous work data have been presented which indicate that thermoluminescence (TL) at 110 degrees C in crystalline quartz is due to recombination of electrons released from (GeO4)- centres with holes trapped (AlO4)0 and unidentified hole traps. this paper new results are identify latter defect (H3O4)0 centres. These defects seen anneal exactly same fashion as during production TL C, sensitise slightly when pre-exposed radiation subsequently heated near 400 C. The effects high...
Abstract Due to their atomically dispersed active centers, single‐atom nanozymes (SAzymes) have unparalleled advantages in cancer catalytic therapy. Here, loaded with chlorin e6 (Ce6), a hydrothermally mass‐produced bimetallic silicate‐based nanoplatforms manganese/gadolinium (Mn/Gd) dual sites and oxygen vacancies (OVs) (PMn SA GMSNs‐V@Ce6) is constructed for tumor glutathione (GSH)‐triggered chemodynamic therapy (CDT) O 2 ‐alleviated photodynamic The band gaps of silica are significantly...
Polydimethylsiloxane (PDMS) elastomers with high mechanical and healing properties are developed as smart materials for electrical power systems electronic devices to address or damage. However, the challenge is reconcile conflicting molecular mechanisms of in development PDMS elastomers. This study adopts "rigid-while-flexible" mutual network structure by copolymerizing rigid polyimide (PI) flexible segments dynamic reversible crosslinking designed on backbones. elastomer (designated PSiPI)...
The 110 degrees C thermoluminescence (TL) peak of unfired, synthetic quartz (Sawyer Research Products) has been found to be strongly superlinear with the dose excitation. Quadratic and nearly cubic dependences have observed both beta - gamma -irradiation. Firing samples at 300 or higher increased sensitivity substantially removed superlinearity. fired a pre-dose (sensitisation) effect similar natural quartz, however, is weaker than in many other types quartz. A model competition during...
A copolyimide (CPI) was prepared by a simple copolymerization process. The film possesses good self-healing ability based on disulfide bond exchange after mechanical/electrical damage and maintains high thermal stability insulation property.
Abstract Water loss of the gel polymer electrolytes (GPEs) and dendrites growth on Zn anode are overriding obstacles to applying flexible zinc‐air batteries (ZABs) for wearable electronic devices. Nearly all previous efforts aim at developing novel GPEs with enhanced water retention therefore elongate their lifespan. Herein, a facile interface engineering strategy is proposed retard GPE from half‐open structured air cathode. In detail, poly(ethylene vinyl acetate)/carbon powder (PEVA‐C)...
Strong near-ultraviolet stimulated emission was observed at room temperature in GaN/AlGaN separate confinement heterostructures (SCH) grown by molecular beam epitaxy (MBE) on sapphire substrates. The MBE SCH samples exhibited threshold pumping powers as low 90 kW/cm2 under the excitation of a frequency-tunable nanosecond laser system with side-pumping configuration. This represents an order magnitude reduction over bulklike GaN. Our results suggest that carrier and waveguiding effects result...
Abstract Coupling with electrospinning technique, metal–organic‐frameworks (MOFs)‐derived porous carbon fibers exhibit a great potential application in the adsorption of volatile organic compounds (VOCs) because their huge surface area, high porosity, as well sufficient heteroatom‐doped active sites. In this work, hierarchically N‐doped nanofibers are obtained after pyrolysis zeolite imidazole framework‐8 and polyacrylonitrile (ZIF‐8/PAN) composite synthesized by method. The fabricated N 2...
We present the results of optical studies on properties GaN grown by low-pressure metalorganic chemical-vapor deposition, with emphasis issues vital to device applications such as stimulated emission and laser action well carrier relaxation dynamics. By pumping, lasing were investigated over a wide temperature range up 420 K. Using picosecond streak camera, free bound exciton decay times examined. In addition, effects pressure interband transitions associated impurity/defect states studied...