A5100431392- Graphene research and applications
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- Quantum Information and Cryptography
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Graphene and Nanomaterials Applications
- 2D Materials and Applications
- Carbon Nanotubes in Composites
- Physics of Superconductivity and Magnetism
- Quantum Computing Algorithms and Architecture
- Nanowire Synthesis and Applications
- Advancements in Battery Materials
- Advanced Fiber Laser Technologies
- Perovskite Materials and Applications
- Organic Electronics and Photovoltaics
- Thermal properties of materials
- Diamond and Carbon-based Materials Research
- Force Microscopy Techniques and Applications
- Microwave Engineering and Waveguides
- X-ray Diffraction in Crystallography
- Electrochemical Analysis and Applications
- Cold Atom Physics and Bose-Einstein Condensates
- Advancements in Semiconductor Devices and Circuit Design
- Crystallization and Solubility Studies
East China University of Science and Technology
2022-2025
Peking University
2010-2025
Chengdu University of Information Technology
2014-2024
Electric Power Research Institute
2024
Tokyo University of Science
2019-2024
RIKEN Center for Quantum Computing
2022-2024
RIKEN Center for Advanced Photonics
2022-2024
Doshisha University
2018-2024
Qingdao University of Technology
2024
Inner Mongolia Electric Power (China)
2024
Layer number and stacking order of few-layer graphene (FLG) are particular interest since they directly determine the performance graphene-based electronic devices. By analyzing Raman spectra images, quantitative indices extracted to discriminate thickness AB-stacked FLG from single- five-layer graphene; a few key spectral characteristics also identified for with misoriented stacking.
We observe optical third harmonic generation from graphene and few-layer graphite flakes produced by exfoliation. The emission scales with the cube of intensity incident near-infrared femtosecond pulses has a wavelength that is one-third wavelength, both consistent generation. extract an effective third-order susceptibility for on order 10${}^{\ensuremath{-}16}$ m${}^{2}$/V${}^{2}$, which comparable to materials are resonantly excited, but larger than transparent at fundamental wavelengths.
Nonlinear 2D layered crystals provide ideal platforms for applications and fundamental studies in ultrathin nonlinear optical (NLO) devices. However, the NLO frequency conversion efficiency constrained by lattice symmetry is still limited layer numbers of crystals. In this work, 3R MoS 2 with broken inversion structure are grown proved to be excellent from monolayer (0.65 nm) toward bulk‐like (300 dimension. Thickness wavelength‐dependent second harmonic generation spectra offer selection...
Atomically thin molybdenum disulfide is emerging as a new nanomaterial with potential applications in the fields of electronic and photonics. Charge carrier dynamics plays an essential role determining its optical properties. We report spatially temporally resolved pump-probe studies charge carriers atomically samples fabricated by mechanical exfoliation. Carriers are injected interband absorption 390-nm pump pulse detected measuring differential reflection time-delayed scanned probe that...
All-inorganic perovskite micro/nanowire materials hold great promises as nanoscale coherent light source due to their superior optical and electronic properties. The coupling strength between exciton photon in this system is important for application, however, rarely studied. In work, we demonstrated the strong of exciton-photon polariton lasing high quality CsPbBr3 micro/nanowires synthesized by a CVD method. By exploring spatial resolved PL spectra cavity, observed mode volume dependent...
We observe optical third-harmonic generation in atomically thin films of MoS2 and deduce effective third-order nonlinear susceptibilities on the order 10–19 m2/V2, which is comparable to that commonly used semiconductors under resonant conditions. By measuring susceptibility as a function light wavelength, we find significant enhancements by excitonic resonances. The demonstrated can be for identification atomic layers with high contrast, better distinguishing power multilayers, less...
We report room temperature ferromagnetism in partially hydrogenated epitaxial graphene grown on 4HSiC(0001). The presence of was confirmed by superconducting quantum interference devices measurements. Synchrotron-based near-edge x-ray absorption fine structure and high resolution electron energy loss spectroscopy measurements have been used to investigate the hydrogenation mechanism origin ferromagnetism. partial induces formation unpaired electrons graphene, which together with remnant...
Synchrotron-based in situ photoelectron spectroscopy investigations demonstrate effective surface transfer p-type doping of epitaxial graphene (EG) thermally grown on 4H–SiC(0001) via the deposition MoO3 thin film top. The large work function difference between EG and facilitates electron from to film. This leads hole accumulation layer with an areal density about 1.0×1013 cm−2, places Fermi level 0.38 eV below Dirac point.
Air-stable, n-doped or p-doped graphene sheets on a chip were achieved by modifying the substrates with self-assembled layers of silane and polymer. The interfacial effects electronic properties investigated using micro-Raman Kelvin probe force microscopy (KPFM). Raman studies demonstrated that phonon vibrations sensitive to doping level various substrates. Complementary information charge transfer between substrate was extracted measuring surface potential flakes KPFM, which illustrated...
Abstract As a rising star of all‐carbon nanomaterial, graphdiyne (GDY) has direct natural bandgap and features strong light–matter interaction, large optical absorption, superior chemical stability, indicating its broad prospects in the field photonics optoelectronics. Herein, broadband nonlinear absorption transient characteristics GDY from visible to infrared region been studied for first time, promising application ultrafast explored. The coefficient (> −1 cm GW ), low saturation...
Abstract Hybrid nanocarbon, comprised of a diamond core and graphitic shell with variable sp 2 ‐/sp 3 ‐carbon ratio, is controllably obtained through sequential annealing treatment (550–1300 °C) nanodiamond. The formation carbon increases temperature the nanodiamond surface reconstructed from amorphous into well‐ordered, onion‐like structure via an intermediate composite structure—a covered by defective, curved graphene outer shell. Direct dehydrogenation propane shows that ‐nanocomposite...
Mixed-dimensional van der Waals (vdW) heterostructures between one-dimensional (1D) perovskite nanowires and two-dimensional (2D) transition metal dichalcogenides (TMDCs) hold great potential for novel optoelectronics light-harvesting applications. However, the ultrafast carrier dynamics 1D 2D TMDCs are currently not well understood, which is critical related optoelectronic Here we demonstrate vdW of CsPbBr3 nanowire/monolayer MoS2 WSe2 further present systematic investigations on their...
We report a method to synthesize tubular graphene structures by chemical vapor deposition (CVD) on Ni nanowire templates, using ethylene as precursor at growth temperature of around 750 °C. Unlike carbon nanotubes that are synthesized via conventional routes, the number layers is determined time and independent tube diameter length, which follow those template. This allows us realize large-diameter tubes with shells comprising few or many desired. Thin observed be highly crystalline, uniform...
Gels formed by coupling two different four-arm star polymers lead to polymer networks with high strength and low spatial heterogeneity. However, like all real networks, these materials contain topological defects which affect their properties. In this study, kinetic graph theory Monte Carlo simulation are used investigate the structure cyclic via A–B type end-linking of symmetric tetra-arm precursors. While loops constituting odd number junctions forbidden precursor chemistry, amount...
A new type of solid-state molecular junction is introduced, which employs reduced graphene oxide as a transparent top contact that permits self-assembled monolayer to be photoswitched in situ, while simultaneously enabling charge-transport measurements across the molecules. The electrical switching behavior less-studied switch, dihydroazulene/vinylheptafulvene, described, used test case.
An ordered superlattice self-assembled from monodispersed nanostructures can exhibit collective effects of its individual building blocks, a desirable property that gives rise to potential applications. However, no general method for the direct fabrication superstructures yet exists, especially superlattices start rational-designed functional molecules. Noncovalent interactions are widely used self-assembly biomolecules in nature, such as various proteins. Instead using hydrogen bonds...
As the transport protein for iron, transferrin can trigger cellular endocytosis once binding to its receptor (TfR) on cell membrane. Using this property, we conjugated onto surface of biodegradable polymeric micelles constructed from amphiphilic block copolymers. The core micelle was either labeled with a near-infrared dye (NIR) or chemotherapeutic drug paclitaxel (PTX) study biodistribution antitumor effect in nude mice bearing subcutaneous TfR-overexpressing cancers. DLS and TEM showed...
The feature of centralized network control logic in Software-Defined Networks (SDNs) paves a way for green energy saving. Router power consumption attracts wide spread attention terms Most research on it is at component level or link level, i.e. each router independent In this paper, we study global management by rerouting traffic through different paths to adjust the workload links when relatively idle. We construct expand topology according routers' connection. A 0-1 integer linear...
Graphene's excellent electrical conductivity benefits from its highly conjugated structure. Therefore, the manipulation of graphene's electronic and mechanical properties should be realized by controlled destruction in-sheet conjugation. Here, we report graphene papers, at molecular level, via either covalent bonding or π–π stacking interactions using monofunctional bifunctional molecules. The papers can tailored with controllable around 100 to below 0.001 S/cm. conjugation system monoaryl...