A5033229765- Graphene research and applications
- 2D Materials and Applications
- Advancements in Battery Materials
- Carbon Nanotubes in Composites
- MXene and MAX Phase Materials
- Surface and Thin Film Phenomena
- Supercapacitor Materials and Fabrication
- Advanced Battery Materials and Technologies
- Catalytic Processes in Materials Science
- Boron and Carbon Nanomaterials Research
- Advanced Photocatalysis Techniques
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- Electrocatalysts for Energy Conversion
- Semiconductor materials and devices
- Advanced Chemical Physics Studies
- Graphene and Nanomaterials Applications
- Advanced Memory and Neural Computing
- Advanced Thermoelectric Materials and Devices
- Natural Compound Pharmacology Studies
- Thermal Expansion and Ionic Conductivity
- Ammonia Synthesis and Nitrogen Reduction
- Catalysts for Methane Reforming
- Perovskite Materials and Applications
- Nanopore and Nanochannel Transport Studies
East China Normal University
2015-2024
Zhejiang Ocean University
2024
New York University Shanghai
2021-2023
The University of Queensland
2018-2023
Institute of Bioengineering and Nanotechnology
2021
Brisbane School of Theology
2021
Polar Research Institute of China
2021
Hong Kong Polytechnic University
2010-2018
Chinese Academy of Sciences
2012-2016
Rice University
2016
Seamless stitching of graphene domains on polished copper (111) is proved clearly not only at atomic scale by scanning tunnelling microscopy (STM) and transmission electron micoscopy (TEM), but also the macroscale optical after UV-treatment. Using this concept seamless stitching, synthesis 6 cm × 3 monocrystalline without grain boundaries foil possible, which limited chamber size.
Hexagonal boron nitride (h-BN) has attracted significant attention because of its superior properties as well potential an ideal dielectric layer for graphene-based devices. The h-BN films obtained via chemical vapour deposition in earlier reports are always polycrystalline with small grains high nucleation density on substrates. Here we report the successful synthesis large single-crystal rational designed Cu–Ni alloy foils. It is found that can be greatly reduced to 60 per mm2 by...
Paired, single-atom catalysts have been shown to demonstrate synergistic effects computationally and experimentally which enable them outperform the benchmark catalyst, Pt/C, for electrochemical reactions. We explore limit of these by screening different transition metal atoms (M = Co, Pt, Fe, Ni) in nitrogen-doped graphene their ability catalyze oxygen reduction reaction (ORR). employ density functional theory methods electronic factors affecting catalytic activity an effort rationalize...
Abstract Hard carbons with low cost and high specific capacity hold great potential as anode materials for potassium‐based energy storage. However, their sluggish reaction kinetics inevitable volume expansion degrade electrochemical performance. Through rational nanostructure design a heteroatom doping strategy, herein, the synthesis of phosphorus/oxygen dual‐doped porous carbon spheres is reported, which possess expanded interlayer distances, abundant redox active sites, oxygen‐rich...
Abstract High current density hydrogen evolution reaction (HER) in alkaline water electrolysis plays crucial role renewable and sustainable energy systems, while posing a great challenge to the highly‐efficient electrocatalysts. Here, synthesis of Ni/NiO@MoO 3− x composite nanoarrays is reported by moderate reduction strategy, combining Ni/NiO nanoparticles (≈20 nm) with amorphous MoO nanoarrays. The possess enhanced hydrophilicity, optimize barriers, accelerate reactant diffusion/bubble...
Thin film field-effect phototransistors (FETs) can be developed from bandgap-tunable, solution-processed, few-layer reduced graphene oxide (FRGO) films. Large-area FRGO films with tunable bandgaps ranging 2.2 eV to 0.5 achieved readily by solution-processing technique such as spin-coating. The electronic and optoelectronic properties of FETs are found closely related their bandgap energy. resulting phototransistor has great application potential in the field photodetection.
Ground-state structures of supported C clusters, CN (N = 16, ..., 26), on four selected transition metal surfaces [Rh(111), Ru(0001), Ni(111), and Cu(111)] are systematically explored by ab initio calculations. It is found that the core–shell structured C21, which a fraction C60 possessing three isolated pentagons C3v symmetry, very stable magic cluster all these surfaces. Comparison with experimental scanning tunneling microscopy images, dI/dV curves, heights proves C21 experimentally...
Defects play significant roles in properties of graphene and related device performances. Most studies defects focus on their influences electronic or luminescent optical properties, while controlling infrared optoelectronic performance by defect engineering remains a challenge. In the meantime, pristine has very low photoresponses ~0.01 A/W due to fast photocarrier dynamics. Here we report regulating reduced oxide phototransistors atomic structure control for first time. The transport...
To understand the nucleation of carbon atoms to form graphene on transition metal substrates during chemical vapor deposition (CVD) synthesis, clusters supported Ni(111) surfaces, namely CN@Ni(111) (where N ≤ 24), were explored systematically using density functional theory (DFT) calculations. Very different from freestanding C clusters, a surface, chain configuration is superior ring formation and dominates ground state until > 12. A structural one-dimensional two-dimensional sp2 network...
The energetics of topological defects (TDs) in carbon nanotubes (CNTs) and their kinetic healing during the catalytic growth are explored theoretically. Our study indicates that, with assistance a metal catalyst, TDs formed addition C atoms can be efficiently healed at CNT-catalyst interface. Theoretically, TD-free CNT wall ${10}^{8}--{10}^{11}$ is achievable, and, as consequence, perfect CNTs up to 0.1--100 cm long possible since linear density $\ensuremath{\sim}100$ per nanometer. In...
The unidirectional alignment of graphene islands is essential to the synthesis wafer-scale single-crystal on Ge(110) surface, but underlying mechanism not well-understood. Here we report that necessary coalignment nucleating surface caused by presence step-pattern; show preannealed textureless appear nonpreferentially orientated, while surfaces with natural step pattern, all emerge coaligned. First-principles calculations and theoretical analysis reveal this different behaviors originate...
The catalytic activities of various catalysts are found to be responsible for the shape evolution graphene domains during CVD growth.
Directly incorporating heteroatoms into the hexagonal lattice of graphene during growth has been widely used to tune its electrical properties with superior doping stability, uniformity, and scalability. However introduction scattering centers limits this technique because reduced carrier mobilities conductivities resulting material. Here, we demonstrate a rapid graphitic nitrogen cluster-doped monolayer single crystals on Cu foil remarkable mobility 13,000 cm2 V-1 s-1 greatly sheet...
Contamination commonly observed on the graphene surface is detrimental to its excellent properties and strongly hinders application. It still a great challenge produce large-area clean film in low-cost manner. Herein, we demonstrate facile scalable chemical vapor deposition approach synthesize meter-sized samples of superclean with an average cleanness 99 %, relying weak oxidizing ability CO2 etch away intrinsic contamination, i.e., amorphous carbon. Remarkably, elimination carbon enables...
Abstract Low‐grade heat to electricity conversion has shown a large potential for sustainable energy supply. Recently, the low‐grade harvesting in thermally regenerative electrochemical cycle (TREC) is promising candidate with high efficiency. In this system, temperature coefficient (α) plays dominant role efficient harvesting. However, internal factors that affect α are still not clear and significant improvements needed. Here, of various Prussian Blue analogues (PBAs) investigated their...
This study attempts to understand the intrinsic impact of different morphologies nanocrystals on their electrochemical stripping behaviors toward heavy metal ions. Two differently shaped Fe3O4 nanocrystals, i.e., (100)-bound cubic and (111)-bound octahedral, have been synthesized for experiments. Electrochemical results indicate that with shapes show Octahedral better sensing performances investigated ions such as Zn(II), Cd(II), Pb(II), Cu(II), Hg(II), in comparison ones. Specifically,...
Three key positions of graphene on a catalyst surface can be identified based precise computations, namely as sunk (S), step-attached (SA), and on-terrace (OT). Surprisingly, the preferred modes are not all alike but vary from metal to metal, depending energies graphene-edge "wetting" by catalyst: soft like Au(111), Cu(111) or Pd(111), tends grow in embedded mode, while rigid such Pt(111), Ni(111), Rh(111), Ir(111), Ru(0001), prefers growing on-terrace. Accordingly, further energy analysis...
Ferroelectric catalysts possess the advantages of boosted catalytic efficiency as a result polarization, which suppresses electron–hole pair recombination, and superior selectivity<italic>via</italic>the ferroelectric switch.
Open, sesame! Graphene nanoribbons (GNRs) with smooth edges and controllable widths are crucial for graphene electronic spintronic applications. High-quality narrow GNRs can be synthesized from single-walled carbon nanotubes at 200–300 °C using a Cu-atom catalyst, which dramatically reduces the energy barrier of unzipping 3.11 to 1.16 eV. Detailed facts importance specialist readers published as "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made...