A5100377571- Graphene research and applications
- Catalytic Processes in Materials Science
- Advanced ceramic materials synthesis
- Boron and Carbon Nanomaterials Research
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- Ammonia Synthesis and Nitrogen Reduction
- Gas Sensing Nanomaterials and Sensors
- Hydrogen Storage and Materials
- Electronic and Structural Properties of Oxides
- ZnO doping and properties
- Advancements in Battery Materials
- Advanced Chemical Physics Studies
- Industrial Gas Emission Control
- Metal and Thin Film Mechanics
- Electrocatalysts for Energy Conversion
- Tribology and Wear Analysis
- Graphene and Nanomaterials Applications
- MXene and MAX Phase Materials
- Muon and positron interactions and applications
- Advanced Photocatalysis Techniques
- Fiber-reinforced polymer composites
- Thermal and Kinetic Analysis
- Fusion materials and technologies
- Quantum and electron transport phenomena
Northwestern Polytechnical University
2009-2025
State Key Laboratory of Solidification Processing
2021-2025
Southwest Petroleum University
2025
Taiyuan University of Science and Technology
2018-2024
Chinese Academy of Sciences
2022
Dalian Maritime University
2022
Dalian Institute of Chemical Physics
2022
Nanjing Tech University
2022
Changchun University of Science and Technology
2017
State Key Laboratory on Integrated Optoelectronics
2017
Functionalized graphene has been extensively studied with the aim of tailoring properties for gas sensors, superconductors, supercapacitors, nanoelectronics, and spintronics. A bottleneck is capability to control carrier type density by doping. We demonstrate that a two-step process an efficient way dope graphene: create vacancies high-energy atom/ion bombardment fill these desired dopants. Different elements (Pt, Co, In) have successfully doped in single-atom form. The high binding energy...
Interaction between single noble metal atoms and graphene edges has been investigated via aberration-corrected monochromated transmission electron microscopy. A collective motion of the Au atom nearby carbon is observed in transition energy-favorable configurations. Most trapping detrapping processes are assisted by dangling atoms, which more susceptible to knock-on displacements irradiation. Thermal energy lower than activation barriers among different configurations, suggests electron-beam...
Vertical integration of hexagonal boron nitride ( h ‐BN) and graphene for the fabrication vertical field‐effect transistors or tunneling diodes has stimulated intense interest recently due to enhanced performance offered by combining an ultrathin dielectric with a semi‐metallic system. Wafer scale processing these heterostructures is needed make large integrated circuitry. In this work, using remote discharged, radio‐frequency plasma chemical vapor deposition, wafer scale, high quality few...
Baize-like monolithic CeO2 and NiO/CeO2 nanorod catalysts were prepared by combined dealloying calcination the catalytic activities evaluated using CO oxidation. The composed of nanorods exhibited a three-dimensional supporting structure with pores. After introduction NiO, dispersed NiO nanosheets nanoparticles supported on surface they not well-crystallined due to inhibiting crystallization. Raman x-ray photoelectron spectroscopy analyses revealed that species into generated more coordinate...
Electrides have been identified so far by two major routes: one is conversion of elemental metals and stoichiometric compounds high pressure; the other to search for electron-rich compounds, this approach more general. In contrast, few electron-deficient structures in existing databases revealed as potential electride candidates. work, we found an compound Ca5Pb3 could be transformed into electrides upon applying external pressure or strain along c-axis, which induces electron immigration...
Formation and evolution of active hydrogen species from H2 on a metal oxide is great importance in many hydrogenation reactions, while understanding the nature surface remains challenge. Herein, high-vacuum-based transmission infrared spectroscopy coupled with temperature-programmed desorption has been applied to study over ZnO ZnCrOx catalysts. We show that D2 dissociates readily form Zn–D O–D at 153 K, simultaneous occurs 223 K. This corroborates reversible dissociation recombination ZnO....
To understand structural and chemical properties of metal–graphene composites, it is crucial to unveil the bonding along interface. We provide direct experimental evidence atomic between typical metal nano structures graphene, agreeing well with density functional theory studies. Single Cr atoms are located in valleys a zigzag edge, few-atom ensembles preferentially form chains by self-assembly. Low migration barriers lead rich dynamics clusters under electron irradiation. demonstrate no...
In-plane and out-of-plane arrangements of carbon atoms in graphene layers play critical roles the fundamental physics practical applications these novel two-dimensional materials. Here, we report initial results on edge/crystal orientations stacking orders bi- tri-layer (BLG TLG) from Raman spectroscopy transmission electron microscopy (TEM) experiments performed same sample. We introduce a new method transferring flakes onto normal TEM grid. Using this method, probed BLG TLG that had been...
Abstract With the discovery of electrides, many electron‐rich materials are reported to be non‐electrides due lack electride characteristics. Up date, only a few studies have been done alter electronic structures these materials. In this work, through atom replacement, energy interstitial electrons in non‐electride Hf 5 Si 3 is successfully modified and hitherto unknown Ca 2 obtained. It revealed that formation has strong link neighboring cations electrons. Moreover, an essential principle...
Thermoelectric (TE) metal oxides overcome crucial disadvantages of traditional heavy-metal-alloy-based TE materials, such as toxicity, scarcity, and instability at high temperatures. Here, we report the properties oxide superlattices, composed from alternating layers 5% Pr3+-doped SrTiO3−δ (SPTO) 20% Nb5+-doped (STNO) fabricated using pulsed laser deposition (PLD). Excellent stability is established for these superlattices by maintaining crystal structure reproducing after long-time (20 h)...
Near-infrared laser radiation based on Nd3+-doped yttrium ortho-aluminate (Nd:YAlO3, Nd:YAP) has garnered significant interest regarding solid-state lasers. Nevertheless, the crystal microstructures and electronic characteristics of Nd:YAP are still unclear, unique physical properties underlying its enormous applications require clarification. In this study, we conducted first-principles calculations at atomic level to explore mechanical both pure YAP YAP. The results suggest that...
Lead-free tetragonal tungsten bronze Sr5LaTi3Nb7O30 ceramics were prepared and the correlation of relaxor nature crystal structure was studied using dielectric spectroscopy powder X-ray diffraction. Three relaxations observed below deviation temperature TD ∼ 330 K. Relaxation I II followed Vogel-Fulcher law with freezing temperatures 189 K ∼90 Low relaxation III, which first in filled bronze, well Arrhenius law. Dielectric response becomes static 50 Polarization-field (P-E) hysteresis loops...
Unraveling the atomic structures of ultrafine iron clusters is critical to understanding their size-dependent catalytic effects and electronic properties. Here, we describe stable close-packed structure Fe for first time, thanks superior properties graphene, including monolayer thickness, chemical inertness, mechanical strength, electrical thermal conductivity. These prefer take regular planar shapes with morphology changes by local shuffling, as suggested early hypothesis solid-solid...