Increasing attention on metamaterials has been paid due to their exciting physical behaviors and potential applications. While most of such artificial material structures developed so far are based metallic resonant structures, Mie resonances dielectric particles open a simpler more versatile route for construction isotropic with higher operating frequencies. Here, we review the recent progresses resonance-based by providing description underlying mechanisms realize negative permeability,...

In this letter, we report an experimental demonstration on voltage tunable short wire-pair metamaterial with negative permeability at microwave frequencies. After infiltrated by nematic liquid crystal, magnetic resonance of can be effectively tuned via relatively low static electric field. The results show, increasing bias from 0 to 100 V, is continuously and reversibly shifted 9.91 down 9.55 GHz. Moreover, the effective metamaterial, for operation frequency around resonance, varies positive...

GdVO4 nano/microcrystals with different morphologies were successfully synthesized via an efficient and facile hydrothermal process using trisodium citrate (Na3Cit) as the chelating ligand. X-Ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), high-resolution (HRTEM), X-ray photoelectron spectra (XPS), fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) cathodoluminescence (CL) employed to characterize samples. By tuning reaction time, vanadium...

A metasurface absorber based on the slow-wave effect has advantages of long interaction time and high absorption. is constructed using periodic arrangement Jerusalem cross, which achieves a reflectivity −15.0 dB at 5.0 GHz. Furthermore, dual-frequency absorption realized by coupling two unit cells with different sizes. The calculated delay metasurfaces further confirms underlying design through provides new ideas to field absorbing creates broad application prospects.

Motivation: Imaging Mass Cytometry (IMC) is a cutting-edge technology for analysing spatially resolved protein expression at the single-cell level. However, its downstream analyses are often hindered by batch effects, which introduce systematic biases and obscure true biological variations. Existing correction methods, largely developed scRNA-seq data, struggle to achieve precise control, leading either over-correction removing critical information, or under-correction leaving residual...

We report on the experimental verification of isotropy and polarization properties high-permittivity metamaterial composed cubic ferroelectric resonators. Barium strontium titanate (BST) with permittivity as high 850 is used ferroelectrics material so that condition fulfilled. The was investigated via scattering an electromagnetic wave under tilted incidence. From data, we observed magnetic resonance, at 8.6 GHz for a millimeter cube size, independent incidence angle TM TE polarizations. For...

ABSTRACT P(N‐phenylmaleimide‐alt‐styrene) (PNS) was synthesized, and nylon 6 (PA6)/PNS blends were prepared by melt blending. The heat resistant crystallographic properties of PA6/PNS with different contents investigated analyzed. results showed that the deflection temperature ( HDT ), relative crystallinity X n dynamic viscosity η ) increased increasing PNS. differential scanning calorimetry proved PNS had played a positive role in nucleating PA6. Scanning electron microscosopy domains...

P(N-phenylmaleimide-alt-styrene) (P(NPMI-alt-St)) and P(N-(4-carboxyphenyl)maleimide-alt-styrene) (P(CPMI-alt-St)) were designed synthesized via free radical copolymerization. Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (¹H NMR 13C NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) used to confirm the structure of P(NPMI-alt-St) P(CPMI-alt-St). Next, effect P(CPMI-alt-St) on heat deflection temperature (HDT) nylon 6 was studied....

Multicolor and monodisperse Y2O3:Ln(3+) (Ln(3+) = Eu(3+), Tb(3+), Dy(3+), Sm(3+), Er(3+), Ho(3+), Tm(3+), Yb(3+)/Er(3+), Yb(3+)/Ho(3+)) microspheres were prepared through a facile urea-assisted homogeneous precipitation method followed by subsequent calcination process. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission (TEM), high-resolution (HRTEM), energy-dispersive spectrum (EDS), Fourier transformed infrared (FT-IR), thermogravimetric analysis (TGA),...

Response surface methodology (RSM) based on Box-Behnken design (BBD) was employed to investigate the effect of ultrasonic treatment b-carotene production by Blakeslea trispora. The optimized strategy involved exposing three-day-old mycelial cultures at a fixed frequency 20 kHz, power 491 W, time 3 min, working s, and rest 5:8 repeated four times 24-h interval. Mycelium growth not significantly promoted under stimulation; however, glucose metabolism increased about 10%, average size...

浙江大学农业与生物技术学院, 浙江杭州 310058; 2 浙江省农业科学院, 310021

The effects of four hindered phenolic antioxidants in the short-term heat-oxygen stability High-Density Polyethylene (HDPE) was evaluated by Melt Flow Rate (MFR) and Oxidation Induction Time (OIT) analyses. results showed that Irganox 1330 1010 had more excellent processing property oxidation resistance behavior HDPE than 1024 3114. OIT values with were up to 97.25 min 89.73 respectively. long-term accelerated tests containing carried out at 110°C deionized water pressurized pure oxygen a...

In this experimental study, we demonstrate the feasibility of a thermally tunable, resonant dielectric microwave metasurface based on sub-wavelength Mie resonances ferroelectric cubes (Calcium titanate, CaTiO3) in which temperature meta-atoms can be locally and dynamically controlled by heating with an optical laser beam over large range temperatures and, consequently, values constant cube corresponding resonance frequency meta-atoms. This avoids any interference otherwise necessary elements...

Molecular dynamics is used to simulate the deposition process of MgO molecules on MgO（001） surface，and substrate temperature and molecular incident energy are discussed in terms their effects diffusivity surface coverage ratio. The simulated results show that with increasing， vacant sites film decrease, owing increase deposited substrate. At low temperatures， ratio increases increasing. high reaches maximum at an 3.0 eV， then it decreases energy.