A5028291928- 2D Materials and Applications
- Graphene research and applications
- MXene and MAX Phase Materials
- Perovskite Materials and Applications
- Boron and Carbon Nanomaterials Research
- Topological Materials and Phenomena
- Nanowire Synthesis and Applications
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Flame retardant materials and properties
- Semiconductor materials and devices
- Surface and Thin Film Phenomena
- Rare-earth and actinide compounds
- Advanced Memory and Neural Computing
- ZnO doping and properties
- Graphene and Nanomaterials Applications
- Chalcogenide Semiconductor Thin Films
- Quantum and electron transport phenomena
- Electronic and Structural Properties of Oxides
- Molecular Junctions and Nanostructures
- Diamond and Carbon-based Materials Research
- Advanced Materials and Mechanics
- Semiconductor materials and interfaces
- Force Microscopy Techniques and Applications
- Gas Sensing Nanomaterials and Sensors
Institute of Physics
2016-2025
Chinese Academy of Sciences
2010-2025
University of Chinese Academy of Sciences
2016-2025
Hefei University
2024-2025
National Laboratory for Superconductivity
2019-2025
Northwest Institute of Nuclear Technology
2024-2025
Songshan Lake Materials Laboratory
2019-2024
Czech Academy of Sciences, Institute of Physics
2007-2024
Physical Sciences (United States)
2024
Beijing Institute of Fashion Technology
2022-2023
We demonstrate the design and fabrication of a novel flexible nanoarchitecture by facile coating ultrathin (several nanometers thick) films MnO2 to highly electrical conductive Zn2SnO4 (ZTO) nanowires grown radially on carbon microfibers (CMFs) achieve high specific capacitance, high-energy density, high-power long-term life for supercapacitor electrode applications. The crystalline ZTO CMFs were uniquely served as cores support electrolytic accessible surface area redox active shells also...
Two-dimensional (2D) materials provide extraordinary opportunities for exploring phenomena arising in atomically thin crystals. Beginning with the first isolation of graphene, mechanical exfoliation has been a key to high-quality 2D but despite improvements it is still limited yield, lateral size and contamination. Here we introduce contamination-free, one-step universal Au-assisted method demonstrate its effectiveness by isolating 40 types single-crystalline monolayers, including elemental...
A simple chemical activation route is developed to convert insulating cotton T-shirt textiles into highly conductive and flexible activated carbon (ACTs) for energy-storage applications. Such conversion gives these ACTs an ideal electrical double-layer capacitive behavior. The constructed asymmetric supercapacitors based on the MnO2/ACT composite show superior electrochemical performances.
Silica coated magnetite (Fe3O4@SiO2) core-shell nanoparticles (NPs) with controlled silica shell thicknesses were prepared by a modified Stöber method using 20 nm hydrophilic Fe3O4 NPs as seeds. The characterized X-ray diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected area (SAED), and UV-Vis adsorption spectra (UV-Vis). results imply that consist of crystalline core an amorphous shell. thickness can be from 12.5 to 45 varying the experimental...
Abstract The discovery of ferromagnetic two-dimensional van der Waals materials has opened up opportunities to explore intriguing physics and develop innovative spintronic devices. However, controllable synthesis these 2D ferromagnets enhancing their stability under ambient conditions remain challenging. Here, we report chemical vapor deposition growth air-stable metallic 1T-CrTe 2 ultrathin crystals with controlled thickness. Their long-range ordering is confirmed by a robust anomalous Hall...
Large-scale hydrophilic Fe 3O 4 nanoparticles (NPs) were prepared in the presence of citrate and sodium nitrate via a facile method. The NPs are quite stable can be freely dispersed water. as-prepared magnetic nanoparticle solution for more than 1 month. mean diameter controlled range ∼20 to ∼40 nm diameter. show superparamagnetic properties with relatively high saturation magnetization moment 58 emu/mg at room temperature. Furthermore, possible formation mechanism is proposed explain why...
Topological insulators, a new quantum state of matter, create exciting opportunities for studying topological physics and exploring spintronic applications due to their gapless helical metallic surface states. Here, we report the observation weak anti-localization oscillations originated from states in Bi2Se2Te crystals. Angle-resolved photoemission spectroscopy measurements on cleaved crystals show well-defined linear dispersion without intersection conduction band. The measured effect...
Monodisperse Au, Ag, and Au3Pd nanoparticles (NPs) with narrow size distribution are prepared by direct reaction of the related metal salt oleylamine in toluene. Oleylamine serves as both a reducing agent surfactant synthesis. The sizes shape these NPs tuned temperatures. hydrophobic oleylamine-coated can be made water soluble replacing 3-mercaptopropionic acid. Both surface plasmonic resonance (SPR) enhanced Raman scattering (SERS) observed from Au Ag found to NP size- surface-dependent.
Silicene-based van der Waals heterostructures are theoretically predicted to have interesting physical properties, but their experimental fabrication has remained a challenge because of the easy oxidation silicene in air. Here, graphene/silicene by silicon intercalation is reported. Density functional theory calculations show weak interactions between graphene and layers, confirming formation heterostructures. The no observable damage after air exposure for extended periods, indicating good...
Indium selenide (InSe) has a high electron mobility and tunable direct band gap, enabling its potential applications to electronic optoelectronic devices. Here, we report the fabrication of InSe photodetectors with on/off ratios ultrahigh photoresponsivity, using ferroelectric poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) copolymer films as top-gate dielectric. Benefiting from successful suppression dark current down ∼10-14A in channel by tuning three different polarization...
Abstract Multiferroic materials, which simultaneously exhibit ferroelectricity and magnetism, have attracted substantial attention due to their fascinating physical properties potential technological applications. With the trends towards device miniaturization, there is an increasing demand for persistence of multiferroicity in single-layer materials at elevated temperatures. Here, we report high-temperature CuCrSe 2 , hosts room-temperature 120 K ferromagnetism. Notably, ferromagnetic...
Abstract The explosive growth of massive‐data storage and the demand for ultrafast data processing require innovative memory devices with exceptional performance. 2D materials their van der Waal heterostructures atomically sharp interfaces hold great promise innovations in devices. Here, this work presents non‐volatile, floating‐gate all functional layers made materials, achieving programming/erasing speeds (20 ns), high extinction ratios (up to 10 8 ), multi‐bit capability. These also...
Moiré superlattices, consisting of rotationally aligned 2D atomically thin layers, provide a highly novel platform for the study correlated quantum phenomena. However, reliable and efficient construction moiré superlattices is challenging because difficulties to accurately angle-align small exfoliated layers need shun wet-transfer processes. Here, precise various demonstrated by picking up stacking large-area mono- or few-layer crystals with predetermined crystal axes, made possible...
Van der Waals (vdW) ferromagnetic materials have emerged as a promising platform for the development of 2D spintronic devices. However, studies to date are restricted vdW with low Curie temperature (T
We report few-layer SnSe2 field effect transistors (FETs) with high current on/off ratios. By trying different gate configurations, 300 nm SiO2 and 70 HfO2 as back only combined a top capping layer of polymer electrolyte, FET ratio 104 can be obtained. This provides reliable solution for electrically modulating quasi-two-dimensional materials electron density (over 1013 cm−2) field-effect transistor applications.
With strong spin-orbit coupling (SOC), ultrathin two-dimensional (2D) transitional metal chalcogenides (TMDs) are predicted to exhibit weak antilocalization (WAL) effect at low temperatures. The observation of WAL in VSe2 is challenging due the relative SOC and three-dimensional (3D) transport nature thick VSe2. Here, we report on quasi-2D sublimed-salt-assisted low-temperature chemical vapor deposition (CVD) grown few-layered high-quality nanosheets. magnitudes magnetoconductance can be...
We report the chemical vapor deposition (CVD) growth, characterization, and low-temperature magnetotransport of 1T phase multilayer single-crystalline VTe2 nanoplates. The transport studies reveal that no sign intrinsic long-range ferromagnetism but localized magnetic moments exist in individual metallic give rise to Kondo effect, evidenced by logarithmical increment resistivity with decreasing temperature negative magnetoresistance (NMR) regardless direction field at temperatures below...
Grain boundaries (GBs) in polycrystalline graphene scatter charge carriers, which reduces carrier mobility and limits applications high-speed electronics. Here we report the extraction of resistivity GBs effect on by direct four-probe measurements millimeter-sized bicrystals grown chemical vapor deposition (CVD). To extract GB from intragrain intergrain measurements, an electronically equivalent extended 2D region is defined based Ohm's law. Measurements seven representative find that...
The development of electrically ultrafast-programmable semiconductor homojunctions can lead to transformative multifunctional electronic devices. However, silicon-based are not programmable so that alternative materials need be explored. Here 2D, multi-functional, lateral made van der Waals heterostructures with a semi-floating-gate configuration on p++ Si substrate feature atomically sharp interfaces and electrostatically programmed in nanoseconds, more than seven orders magnitude faster...
Aligned single crystalline boron nanowire arrays are formed by thermal carbon reduction. The SEM image shows an array of nanowires (ca. 5 µm long) vertically aligned in high density on a Si substrate. These have enhancement factor, good emission stability, and can endure current, which suggest they excellent candidate for field-emission applications.
Single crystalline boron nanocones are obtained by a simple chemical vapor deposition method. Electric conductivity values of (1.0–7.3) × 10–5 (Ω cm)–1. Results field emission show the low turn-on and threshold electric fields about 3.5 V μm–1 5.3 μm–1, respectively. Boron with good electrical transport properties promising candidates for application in flat panel displays nanoelectronics building blocks.
We report high-quality topological insulator Bi2Te3 thin films grown on muscovite mica substrates by molecular beam epitaxy. The topographic and structural analysis revealed that the exhibited atomically smooth terraces over a large area high crystalline quality. Both weak antilocalization effect quantum oscillations were observed in magnetotransport of relatively samples. A phase coherence length 277 nm for 6 film surface mobility 0.58 m2 V−1 s−1 4 achieved. These results confirm are