A5046921201- Graphene research and applications
- 2D Materials and Applications
- Thermal Radiation and Cooling Technologies
- Diamond and Carbon-based Materials Research
- Boron and Carbon Nanomaterials Research
- Mechanical and Optical Resonators
- Plasmonic and Surface Plasmon Research
- Financial Markets and Investment Strategies
- Monetary Policy and Economic Impact
- Photonic and Optical Devices
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Synthetic Organic Chemistry Methods
- Strong Light-Matter Interactions
- Stock Market Forecasting Methods
- Thermal properties of materials
- Quantum and electron transport phenomena
- Ga2O3 and related materials
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Topological Materials and Phenomena
- Optical Network Technologies
- Magnetic properties of thin films
- Nonlinear Dynamics and Pattern Formation
- Chaos control and synchronization
- Phase-change materials and chalcogenides
Kansas State University
2018-2025
China University of Petroleum, Beijing
2023-2025
University of New Mexico
2025
Shaanxi Provincial People's Hospital
2024
Shanxi Medical University
2024
Xi'an Medical University
2024
Hebei University
2022-2024
Nanjing University
2020-2024
National Time Service Center
2023
Chinese Academy of Sciences
2023
Abstract Hexagonal boron nitride (h-BN) has been predicted to exhibit an in-plane thermal conductivity as high ~ 550 W m −1 K at room temperature, making it a promising management material. However, current experimental results (220–420 ) have well below the prediction. Here, we report on modulation of h-BN by controlling B isotope concentration. For monoisotopic 10 h-BN, 585 is measured 80% higher than that with disordered concentration (52%:48% mixture and 11 B). The temperature-dependent...
Purifying C2H2 by removing trace CO2 is critically needed yet challenged their analogous physical properties. Herein, we report a commercial resin adsorbent HP20 (Diaion® HP-20 Resin) loaded with polyethyleneimine (PEI@HP20) which selectively captures and excludes C2H2. PEI@HP20 possesses high adsorption capacity (4.35 mmol/g) at 100 kPa 298 K record CO2/C2H2 uptake ratio compared all reported CO2-selective adsorbents. The ideal adsorbed solution theory selectivity reaches 1.33×107....
Hexagonal boron nitride (hBN) with a single isotope have many enhanced physical, thermal and optical properties compared to the most common hBN natural distribution of (19.9 at. % 10B 80.1 11B). These property differences can significantly improve device performance in applications, such as neutron detectors, nanoscale electronics, components. In this study, new method for growth large-scale, high-quality monoisotopic crystals, i.e., h10BN h11BN, was developed. crystals were grown using...
Imaging polariton dynamics Two-dimensional (2D) materials can confine light to volumes much shorter than the wavelength, and, together, long propagation lengths make them attractive for developing nanophotonic platforms. Characterizing spatiotemporal control of 2D wave packets has been hindered same reasons that their potential applications exciting: They have extremely small wavelengths and are strongly confined inside material. Kurman et al. developed a new pump-probe technique based on...
Spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of flexible two-dimensional sensing platforms. Here we rely on hBN crystals isotopically enriched with either
Thermal transport across solid–solid interfaces is vital for advanced electronic and photonic applications, yet conventional conduction pathways often restrict performance. In polar crystals, hybridized vibrational modes called phonon polaritons offer a promising avenue to overcome the limitations of intrinsic heat conduction. Here our work demonstrates that volume-confined hyperbolic polariton (HPhP) can transfer energy at rates far exceeding phonon–phonon Using pump–probe thermoreflectance...
A number of alternative mean-variance portfolio strategies have been recently proposed to improve the empirical performance classic Markowitz framework. Designed as remedies for parameter uncertainty and estimation errors in selection problems, these deliver substantially better out-of-sample performance. In this article, we first show how solve a general problem linear regression Then propose reduce risk expected returns variance-covariance matrix asset by imposing additional constraints on...
Zinc oxide nanoparticles (ZnO NPs) are increasingly applied in a diverse array of industrial and commercial products. Therefore, it is urgently required to characterize their toxic behavior. ZnO NPs have been reported induce effects at the levels individual organism, tissue, cell DNA. However, little known about potential impacts subcellular level. In present work, we investigated toxicity isolated rat liver mitochondria. We found that treatment mitochondria with resulted collapse...
Polaritons formed by the coupling of light and material excitations enable light-matter interactions at nanoscale beyond what is currently possible with conventional optics. However, novel techniques are required to control propagation polaritons implement first practical devices. Here we report experimental realization polariton refractive meta-optics in mid-infrared exploiting properties low-loss phonon isotopically pure hexagonal boron nitride interacting surrounding dielectric...
A boron-doped diamond (BDD) has been widely used as an outstanding electrode for constructing high-performance electrochemical biosensors. In this paper, we fabricated a novel combined of nanometer-sized graphite-BDD film (NG-BDD) by chemical vapor deposition. The graphite (NG) is formed on the (111) facet BDD via converting sp3 structure to sp2 graphitic phase at high temperature in boron-rich ambient. was characterized means scanning electron microscopy, Raman spectroscopy, X-ray...
Phonon polariton (PhP) nanoresonators can dramatically enhance the coupling of molecular vibrations and infrared light, enabling ultrasensitive spectroscopies strong with minute amounts matter. So far, this resulting localized hybrid modes have been studied only by far-field spectroscopy, preventing access to modal near-field patterns dark modes, which could further our fundamental understanding nanoscale vibrational (VSC). Here we use spectroscopy study between PhP made h-BN vibrations. For...
Optically active spin defects in hexagonal boron nitride (hBN) are promising quantum systems for the design of two-dimensional sensing units offering optimal proximity to sample being probed. In this Letter, we first demonstrate that electron resonance frequencies vacancy centers (${V}_{\mathrm{B}}^{\ensuremath{-}}$) can be detected optically limit few-atomic-layer thick hBN flakes despite nanoscale crystal surface often leads a degradation stability solid-state defects. We then analyze...
We study shallow and deep levels in carbon-doped hexagonal boron nitride crystals precipitated from a molten metal solution high-temperature furnace. Reflectance photoluminescence under ultraviolet excitation are complemented by spatially resolved experiments means of scanning confocal micro-photoluminescence setup operating the ultraviolet. Isotopically controlled carbon doping does not induce any energy shift well-known deep-level emission at 4.1 eV. Our detailed characterization series...
Based on HSV gamut space, a visualization system of muscle activity is proposed to study the mapping relationship between hand motion and active areas upper arm muscle. There significant threshold change in starting ending points segment original EMG signal, part that exceeds TH date. Set window width K fixed increment Kt time remove redundant data. The sEMG intensity information each sampling electrode obtained by calculating MAV window, simulation experiment conducted space. Through...
The highest quality hexagonal boron nitride (hBN) crystals are grown from molten solutions. For hBN crystal growth at atmospheric pressure, typically the solvent is a combination of two metals, one with high solubility and other to promote nitrogen solubility. In this study, we demonstrate that high-quality can be pressure using pure iron as flux. ability produce excellent-quality unexpected, given its low for nitrogen. properties produced flux matched best values ever reported hBN: narrow...
Dispersionless energy bands in $k$ space are a peculiar property gathering increasing attention for the emergence of novel electronic, magnetic, and photonic properties. Here, we explore impact electronic flat on light-matter interaction. The van der Waals interaction between atomic layers hexagonal boron nitride induces along specific lines Brillouin zone. macroscopic degeneracy these leads to Hove singularities with divergent joint density states, resulting outstanding optical properties...
Abstract The boron-vacancy spin defect ( $${\,{{\mbox{V}}}}_{{{\mbox{B}}}\,}^{-}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mrow> <mml:mspace /> <mml:mstyle> <mml:mtext>V</mml:mtext> </mml:mstyle> </mml:mrow> <mml:mtext>B</mml:mtext> <mml:mo>−</mml:mo> </mml:msubsup> </mml:math> ) in hexagonal boron nitride (hBN) has a great potential as quantum sensor two-dimensional material that can directly probe various external perturbations atomic-scale proximity to...
Hexagonal boron nitride (hBN) is attracting much attention due to its tremendous applications including nanophotonic and electronic devices, substrates for two-dimensional (2D) materials, heat management etc. To achieve the best device performance, large area hBN single crystals are required. Herein, large-area (>500 μm each), high-quality (defect density < 0.52/μm2) bulk grown from molten metal solutions with a temperature gradient. The narrow Raman line widths of intralayer E2g mode peak...