As pioneering Fe

Realizing tunable multiband perfect absorption from ultraviolet (UV) to near-infrared (IR) range in nanophotonics and metamaterials is extremely significant for solar energy harvesting optical sensors. Here, five narrowband broadband absorbers (PA) are simultaneously achieved a simple 3-D metamaterial consisting of aluminum (Al) standing U-shaped split-ring resonators (SUSRRs) on SiO2/Al layer, which stems the plasmonic hybridization between three high-order surface plasmon polarization...

Bound states in the continuum hold extraordinary optical topological properties and can significantly enhance interaction between light matter including circular dichroism (CD) chiral resonant metasurfaces. In this paper, we demonstrate split displacement of charges through tilted double-elliptical half-disk It enables feasibility to attain perfect intrinsic chiroptic responses, with a CD exceeding 0.99. The ellipticity (\ensuremath{\chi}) response, induced by vertical incidence, is also...

The advancements in chiroptics have propelled applications beyond traditional optics, expanding its reach into domains such as heat and fluid mechanics. current research predominantly focused on utilizing plasmonic materials the photothermal photofluidic systems. However, these systems face limitations circular dichroism due to inherent Ohmic loss associated with materials. Herein, we introduce concept of topological polarization singularity an all-dielectric structure, which supports chiral...

We numerically demonstrate an ultraviolet graphene ultranarrow absorption in a hybrid graphene-metal structure. The full-width at half maximum of the band being 9 nm range is achieved based on coupling lattice plasmon resonances metallic nanostructure to optical dissipation graphene. position, absorbance and linewidth hybridized narrow resonant mode tuned by controlling geometrical parameters materials are systematically investigated. proposed structure possesses high refractive index...

Two different nanostructured copper–isonicotinic acid (INA) coordination polymers, Cu(C6H4NO2)2(H2O)4 and [Cu(C6H4NO2)(OH)]H2O have been successfully synthesized under hydrothermal conditions on a large scale without the assistance of surfactants or template. has morphology 2-dimensional (2D) butterfly-like nanosheet structures, while consists one-dimensional (1D) nanorods. A possible formation mechanism obtained polymer nanostructures is proposed with provision crystal structure. After heat...

Abstract In this study, quasi‐cubic and hexagonal bipyramid α‐Fe 2 O 3 polyhedrons with high‐index facets exposed were controllably synthesized by applying metal ions Zn 2+ or Cu as structure‐directing agents. The growth of the nanostructures induced without addition any other surfactants. form controlled looks like a cube but has an angle approximately 86° bound (012), (10‐2), (1‐12) facets, whereas sixfold axis {012} facets. Magnetic measurements confirm that these two kinds nanocrystals...

Abstract The optimization of charge transport with electron‐hole separation directed toward specific redox reactions is a crucial mission for artificial photosynthesis. Bismuth vanadate (BiVO 4 , BVO) popular photoanode material solar water splitting, but it faces tricky challenges in poor due to its modest properties. Here, concept the external electron layer (ETL) first proposed and demonstrated effectiveness suppressing recombination both bulk at surface. Specifically, conformal carbon...

In this work, we propose a titanium nitride (TiN)-based ultra-broadband perfect absorber from the ultraviolet to near-infrared wavelength ranges with average absorptivity up 96.7%. The weighted absorption efficiency of solar radiation energy reaches 95.6%. addition, photothermal therapy is conducted on such absorber, showing effectively confined local high-temperature in vicinity device. steady-state temperature 327 K at depth 3 mm beneath tissue surface, leading efficient optical damage...

Hexagonal α-Fe2O3 nanoplates were prepared through a hydrothermal method with the addition of Al3+ ions. The added ions not only act as structure-directing agent for controlled growth nanoplates, but may also be reason magnetism alteration α-Fe2O3.

The exploration of efficient and stable N2 fixation photocatalysts featuring a broad absorption spectrum active sites has become specifically conspicuous. Herein, series reduced polyoxovanadates (POVs) were intercalated into copper-induced ZnAl layered double hydroxide (0.5%-ZnAl LDH) nanosheets with oxygen vacancies via an anion exchange strategy toward green ammonia production. intervalence charge transfer arising from mixed-valence POV materials is responsible for its light-harvesting...

The vibration characteristics of an axially moving vertical plate immersed in fluid and subjected to a pretension are investigated, with special consideration natural frequencies, complex mode functions critical speeds the system. classical thin theory is adopted for formulation governing equation motion vibrating plates. effects free surface waves, compressibility viscidity neglected analysis. velocity potential Bernoulli’s used describe pressure acting on plate. effect vibrations may be...

Solar‐driven photo‐electrochemical (PEC) water splitting paves a promising route toward the future of scalable hydrogen production. However, oxidation dominated by hole carriers excited in photoanode is critical bottleneck that hampers PEC overall efficiency due to sluggish transfers and surface reaction kinetics for most semiconductors. Herein, dual interface layers including buried p–n junction an active catalytic synergistically accelerate extraction injection over n‐type BiVO 4...

Abstract In this study, we investigated the synthesis of monodisperse CuO hard and hollow nanospheres with extraordinary visible‐light photocatalytic abilities for dye photodegradation. The were constructed assistance from water‐soluble biopolymer sodium alginate (SA). alkaline solution, spheres can be gradually corroded by ammonia to form under hydrothermal conditions. Their activities results show that both have great photodegradation dyes. particular, activity towards Methyl blue (MB) it...

As a powerful spectroscopy technique, surface-enhanced Raman scattering (SERS) can provide non-destructive and sensitive characterization down to single molecular level. Aiming the main challenges of high-performance SERS-active substrates for their real-world applications involving ultra-sensitive reproducible signals detection signal uniformity with large-area, herein, facile reliable strategy based on combination thermal imprinting polycarbonate (PC) film porous anodic aluminum oxide...

This work investigated the feasibility and efficiency of a heterogeneous photo-Fenton catalyst, Fe/Si codoped TiO₂, for degradation metronidazole (MNZ) under visible light irradiation.

Uniform Zn2SnO4/SnO2 hollow spheres were successfully synthesized and hybridized by calcining ZnSn(OH)6 solid in air, showed a very good efficiency of 4.52% as an electrode material for DSSCs. The situ hybridization Zn2SnO4 SnO2 is beneficial electron transport light scattering, leads to the high composite

To improve the forecasting accuracy of short-term traffic flow and provide precise reliable information for management units travelers, this study proposes a hybrid prediction model that is based on characteristics K-nearest neighbor (KNN) method support vector regression (SVR). The proposed model, i.e. KNN-SVR, mimics search mechanism KNN to reconstruct time series historical similar current flow. Then, SVR used forecasting. Using actual data, we effect flows target adjacent section roads...

In the research, sulfide nanoscale zero-valent iron (S-nZVI) was synthesized, characterized and further applied to remove hexavalent chromium Cr(VI) from water. The results showed that a maximum adsorption (81 mg/g) repeatability reached at sulfur/iron molar ratio of 0.1. Sulfide modification could form amorphous FeS on surface nZVI, which enhanced antioxidant activity hydrophobicity S-nZVI0.1. removal by S-nZVI0.1 in accordance with pseudo-second-order Langmuir model theoretical capacity...

Plasmonic systems based on metal nanoparticles a film with high optical absorption have generated great interests for surface‐enhanced Raman scattering (SERS). In this study, we prepare broadband‐visible light absorber consisting Au nanotriangles the surface of continuous optically opaque gold separated dielectric SiO 2 layer, which is typical metal‐insulator‐metal (MIM) system, and demonstrate it as an efficient SERS substrate. The MIM nanostructure, prepared using nanosphere lithography...