A5072951073- 2D Materials and Applications
- Graphene research and applications
- MXene and MAX Phase Materials
- Topological Materials and Phenomena
- Advancements in Battery Materials
- Conducting polymers and applications
- Iron and Steelmaking Processes
- Gas Sensing Nanomaterials and Sensors
- X-ray Diffraction in Crystallography
- Advanced Battery Materials and Technologies
- Perovskite Materials and Applications
- Advanced Memory and Neural Computing
- Crystallization and Solubility Studies
- Quantum Dots Synthesis And Properties
- Advanced Thermoelectric Materials and Devices
- Metallurgical Processes and Thermodynamics
- Quantum and electron transport phenomena
- Molecular Sensors and Ion Detection
- Transition Metal Oxide Nanomaterials
- Surface and Thin Film Phenomena
- Ferroelectric and Negative Capacitance Devices
- Diamond and Carbon-based Materials Research
- Supercapacitor Materials and Fabrication
- Graphene and Nanomaterials Applications
- Porphyrin and Phthalocyanine Chemistry
University of Science and Technology Beijing
2019-2025
Guangdong University of Technology
2024-2025
National University of Defense Technology
2013-2024
Beijing Forestry University
2024
Tsinghua University
2010-2024
Qingdao University of Science and Technology
2024
Guizhou University
2023-2024
Northeast Normal University
2024
The George Institute for Global Health
2023
UNSW Sydney
2023
Topological insulator thin films of Bi2Te3 with controlled electronic structure can be grown by regulating the molecular beam epitaxy (MBE) growth kinetics without any extrinsic doping. N- to p-type conversion results from change in concentrations TeBi donors and BiTe acceptors. This represents a step toward controlling topological surface states, potential applications devices.
The influence of gold nanoparticles (GNPs) on graphene was studied by Raman spectroscopy. It found that the contact GNPs could induce whole spectrum to redshift. And shift 2D peak is more obvious than G peak. A model local strain brought forward explain spectrum, which comes from charges transfer between and graphene. observation shifts helps us gain physical insights into graphene-related systems.
A simply and reproducible way is proposed to significantly suppress the nucleation density of graphene on copper foil during chemical vapor deposition process. By inserting a into tube with one close end, foils can be reduced by more than five orders magnitude an ultra-low ~10 nucleus/cm2 has been achieved. The structural analyses demonstrate that single crystal monolayer lateral size 1.9 mm grown under optimized growth condition. electrical transport studies show mobility such around 2400 cm2/Vs.
Abstract Supramolecular architectures are constructed by the self‐assembly of small building blocks via use metal‐ligand coordination, π–π stacking interactions, hydrogen bonding, host‐guest and other noncovalent driving forces, which confer unique dynamic reversibility stimulus responsiveness to supramolecular materials also lead demand expensive complex equipment for characterization assembly processes. Fortunately, processes bring monomeric chromophores together, offering possibilities...
Abstract Metal selenides (MSes) have great potential as candidate anode materials in high‐specific‐energy sodium‐ion batteries (SIBs) but are plagued by rapid capacity degradation and slow kinetics. Here, it is reveal that the Bi 2 Se 3 discharge process involves multiple‐types of sodium polyselenides (Na‐pSe x ) which suffer from terrible dissolution shuttling properties. Based on these observations, a nanoflower‐like composite dual carbon‐confined 3− crystallites designed via facile defect...
Mixed-dimensional heterostructures integrate materials of diverse dimensions with unique electronic functionalities, providing a new platform for research in electron transport and optoelectronic detection. Here, we report novel covalently bonded one-dimensional/two-dimensional (1D/2D) homojunction structure robust junction contacts, which exhibits wide-spectrum (from the visible to near-infrared regions), self-driven photodetection, polarization-sensitive photodetection capabilities....
Large volume strain and slow kinetics are the main obstacles to application of high-specific-capacity alloy-type metal tellurides in potassium-ion storage systems. Herein, Bi2Te3-x nanocrystals with abundant Te-vacancies embedded nitrogen-doped porous carbon nanofibers (Bi2Te3-x@NPCNFs) proposed address these challenges. In particular, a hierarchical fiber structure can be achieved by polyvinylpyrrolidone-etching method is conducive increasing Te-vacancy concentration. The unique together...
Atomically thin transition metal dichalcogenides (TMDCs) have drawn much interest for their promising applications in electronic, optoelectronic, valleytronic and sensing fields. Controlled growth of large-scale high-quality TMDC nanostructures is highly desirable but remains challenging. In the present work, monolayer, bilayer few-layer MoSe2 films been controllably synthesized by ambient pressure chemical vapor deposition (APCVD). Hydrogen flow rate, temperature as well selenium–metal flux...
Polymorphic structures of transition metal dichalcogenides (TMDs) host exotic electronic states, like charge density wave and superconductivity. However, the number these is limited by crystal symmetries, which poses a challenge to achieving tailored lattices properties both theoretically experimentally. Here, we report coloring-triangle (CT) latticed MoTe2 monolayer, termed CT-MoTe2, constructed controllably introducing uniform ordered mirror-twin-boundaries into pristine monolayer via...
Growing uniform oxides with various thickness on TMDs is one of the biggest challenges to integrate into complementary metal oxide semiconductor (CMOS) logic circuits. Here, we report a layer-by-layer oxidation atomically thin MoTe2 flakes via ozone (O3) exposure. The MoOx film could be tuning atomic-level accuracy simply by varying O3 exposure time. Additionally, MoOx-covered shows hole-dominated transport behavior. Our findings point simple and effective strategy for growing homogenous...
Amorphous Sr-doped LaMnO3 (a-LSMO) thin films were deposited on Pt/Ti/SiO2/Si substrate by radio frequency magnetron sputtering. The Ag/a-LSMO/Pt device exhibited reversible bipolar resistive switching over 100 cycles with a resistance ratio (high state to low state) of 4 orders magnitude and stable retention for 104 s at room temperature. Analysis indicates that the originates from formation/rupture Ag nanofilaments in a-LSMO acting as solid electrolytes. showed potential multibit storage...
Controllable synthesizing of one-dimensional-two-dimensional (1D-2D) heterostructures and tuning their atomic electronic structures is nowadays particular interest due to the extraordinary properties potential applications. Here, we demonstrate temperature-induced phase-controlled growth 1D Mo6Te6-2D MoTe2 via molecular beam epitaxy. In situ scanning tunneling microscopy study shows 2D ultrathin films are synthesized at low temperature range, while nanowires gradually arise dominate as...
Abstract Hard carbons (HCs) have emerged as promising candidates for commercial anodes in potassium‐ion batteries (PIBs). However, a thorny challenge remains achieving high reversible capacities at charge/discharge rates, which significantly hinders the development of HCs PIBs. Here, temperature‐controlled strategy is proposed to effectively balance graphitic nanodomains and heteroatom doping content HCs, resulting widened carbon layer spacing, conductivity, abundant K‐ion intercalation...
Abstract Molybdenum diselenide (MoSe 2 ), a promising anode material for potassium‐ion batteries (KIBs), often suffers from sluggish kinetics, substantial volumetric expansion, and dissolution shuttling of intermediate phases, resulting in unsatisfactory cycle stability rate performance. In this work, dual‐defect MoSe (equipped with interlayer defects Se vacancies) is introduced by novel plasma‐induced etching process, encapsulated nitrogen‐doped porous carbon nanofibers (denoted as dd‐MoSe...
Abstract To study the high strain rate tensile behaviors of hydroxyl‐terminated polybutadiene (HTPB) propellant at low temperatures, uniaxial tests were conducted different rates (0.4–42.86 s −1 ) and temperatures (233–298 K) using an INSTRON testing machine. Scanning electron microscopy (SEM) was employed to observe fracture surfaces. Experimental results indicate that rate, temperature test environment remarkably influence HTPB propellant. The stress‐strain curves exhibit three shapes....
One-dimensional (1D) metallic mirror-twin boundaries (MTBs) in monolayer transition-metal dichalcogenides exhibit a periodic charge modulation and provide an ideal platform for exploring collective electron behavior the confined system. The underlying mechanism of how electrons travel 1D structures remain controversial. Here, first time, we observed atomic-scale distribution within one period MTB MoTe2 by using scanning tunneling microscopy/spectroscopy. coexisting apparent lattice...
The stacking order plays a critical role in the electronic and optical properties of two-dimensional materials. It is however great challenge to achieve large-size homogeneous bilayer crystals with precisely controlled orders. Here, we demonstrate an optimized chemical vapor deposition strategy grow MoSe2 bilayers AA or AB sequences. Reverse gas flow effectively suppresses random nucleation centers, leading uniform growth second layer on first monolayer. A customized temperature profile...