Chemical mechanical polishing (CMP) is widely used to achieve an atomic surface globally, yet its cross-scale mechanisms are elusive.

Delicate design and controllable fabrication of efficient oxygen evolution reaction (OER) electrocatalysts based on earth-abundant elements is a highly desired yet challenging task. Herein, Fe2O3@CuO core–shell nanotube heterostructure in situ grown from copper foam (denoted as NTs/CF) was first synthesized an OER electrocatalyst. It has been demonstrated that the unique morphology provided large electrochemical surface area. Moreover, electron transfer between Fe2O3 CuO (electronic...

Plasmonic sensors exhibit tremendous potential to accomplish real-time, label-free, and high-sensitivity biosensing. Gold nanohole array (GNA) is one of the classic plasmonic nanostructures that can be readily fabricated integrated into microfluidic platforms for a variety applications. Even though GNA has been widely studied, new phenomena applications are still emerging continuously expanding its capabilities. In this article, we demonstrated narrow-band high-order resonances enabled by...

Diamond crystals hold promising applications in electronics and optics but are particularly challenging controlled fabrication. Current diamond machining is primarily achieved through surface oxidation. However, knowledge remains limited to microscale oxidation dynamics, impeding the development of precision This work uses a self-developed operando system unravel dynamics on microcrystals under high-temperature, oxygen-rich atmosphere. After precise sampling by focused ion beam,...

To improve polishing performance and reduce the environmental pollution of chemical mechanical (CMP) tests, mesoporous shell/core silica abrasives were prepared, a novel green CMP slurry was developed, including sorbitol, hydrogen peroxide sodium carbonate. Prior to CMP, fused roughly polished with ceria slurry. Using developed abrasives, surface roughness Sa is reduced from 0.347 0.253 nm for scanning area 200 × μm2, material removal rate (MRR) increased 70 127 min-1, compared traditional...

The efficient decomposition of ammonia to produce COx -free hydrogen at low temperatures has been extensively investigated as a potential method for supplying mobile devices based on fuel cells. In this study, we employed dielectric barrier discharge (DBD) plasma, non-thermal enhance the catalytic over supported Ru catalysts (Ru/Y2 O3 , Ru/La2 Ru/CeO2 and Ru/SiO2 ). plasma-catalytic reactivity was found be superior that other three catalysts. It observed both physicochemical properties...

We study the anharmonic phonon interactions in single-crystal semiconducting (α) and metal-like (β) van der Waals In2Se3 layers, through determination analysis of temperature-dependent Raman spectra thermal conductivities, supported by first-principles calculations band structures. Our results indicate strong lattice anharmonicity β-In2Se3 giving rise to significant peak broadening a suppressed conductivity reveal that are main transport-limiting mechanism both phases. The low combined with...

Other than the well‐known sulfurization of molybdate compound to synthesize molybdenum disulfide (MoS 2 ) layers, dynamic process in whole crystalline growth from nuclei triangular domains has been rarely experimentally explored. Here, a competing sulfur‐capture principle jointly with strict epitaxial mechanism is first proposed for initial topography evolution and final intrinsic highly oriented MoS Mo or S terminations on graphene (Gr) template. Additionally, potential distributions bare...

The plasmoelectric potential effect, based on all-metal nanostructures, is a newly discovered plasmon-induced photoelectric converting mechanism. In this work, we have experimentally demonstrated that gold and silver nanoparticles exhibit opposite potentials under the same excitation source, depending their distinct surface plasmon resonance (SPR) frequencies. Three-dimensional mapping of depicts height-related information as well charge density evolution process down to single nanoparticle...

A comprehensive system with a high speed is built for imaging the terahertz (THz) surface plasmon polaritons (SPPs). Both amplitude and phase information of focusing THz-SPPs excited by semicircular plasmonic lens are achieved using this system. The images present profiles different frequencies reveal Gouy shift as evolving through focus. simulations also performed good agreement between experimental simulated results has been found.

Polarization-controlled focusing of surface plasmon polaritons (SPPs) is experimentally and theoretically investigated in the terahertz (THz) frequency range. The spiral phase distribution singularities, which, respectively, lead to transverse shift focal spot for circularly polarized THz radiation split linearly radiation, are observed. Furthermore, an alternative theoretical model based on Huygens-Fresnel principle Fourier transformation SPPs proposed analyze spot, which provides a simple...

High-quality and unique surface plasmon resonance (SPR) with a narrow linewidth controllable energy plays key role in wide applications including ultrahigh-resolution spectroscopy, on-chip sensing, optical modulation, solar cell technology. In this work, the response of polariton (SPP) modes Au nanohole arrays has been effectively tuned by properly adjusting sample orientation without changing geometrical parameters, very down to 8 nm is achieved via strong interference two (0, -1) (-1, 0)...

The competition between plasmonic resonances and noble-metal interband transitions at near-ultraviolet (NUV) frequencies complicates nonlinear conversion processes nanoscales. Here, we experimentally design a highly enhanced reproducible plasmon-enhanced second-harmonic generation (PESHG) platform suitable for NUV by constructing three-dimensional silver mushroom arrays. SHG emission from proposed platforms involved in geometrical asymmetry greatly outperforms that unpatterned metallic...

Conventional imaging systems can only capture light intensity. Meanwhile, the lost phase information may be critical for a variety of applications such as label-free microscopy and optical metrology. Existing retrieval techniques typically require bulky setup, multi-frame measurements, or prior target scene. Here, we proposed an extremely compact system complex amplitude imaging, leveraging extreme versatility single-layer metalens to generate spatially-multiplexed polarization-phase-shifted...

The controllable aggregation of nanoparticles in solution is an important but unsolved problem nanotechnology, which mainly hindered by the symmetrical structure nanoparticles. Here, we propose anisotropic semishell nanostructure to achieve rod-shaped assembly solution. isotropic Au@silica core–shell are self-assembled on silicon wafer drop-casting technique form a monolayer film. obtained after selectively removing part silica shell reactive ion etching. After functionalization with...

Nitrite (NO2–) in water and food is a potential threat to human health. The determination of nitrite content very significant for people's life safety. Here, 4-aminothiophenol (4-ATP)-modulated silver growth on gold nanospheres (GNSs) was designed detect nitrite. It verified that the exposed amino groups 4-ATP molecules GNSs can accelerate Ag overgrowth. On contrary, deamination reaction with reduce overgrowth rates. modified not only increase spectrophotometry response low limit detection...

Abstract High‐index all‐dielectric resonators have been developed into an important platform for light manipulation at the nanoscale over past decade. Although they are widely used as 2D materials, transition metal dichalcogenides (TMDCs), emerging material, also to fabricate optical nanoantennas that support multipolar Mie resonances. However, their fabrication depends heavily on electron‐beam lithography (EBL) or focused ion beam (FIB), which is expensive and time‐consuming practical...

Nanoparticle clusters provide new degrees of freedom for light control due to their mutual interaction compared with an individual one. Here, the authors demonstrate theoretically and experimentally a type optical anapole (a nonradiating state) termed as extrinsic anapole, mode field spreading across Si nanodisk dimers unlike intrinsic one that is confined within nanodisks. The sensitive polarized excitation. When electric vector E excitation perpendicular dimer axis, coupled toroidal dipole...

Ni(HCO₃)₂ has been firstly demonstrated to be efficient promoter of MoS₂-based catalyst for hydrogen generation in alkaline through both experimental and DFT calculation results.

An ultrasensitive refractive index sensor based on a lossy all-dielectric nanosphere.