Here an alternative preparation route, pulsed laser ablation in liquid (LAL) of FeCl 3 solution, is reported to facilely synthesize crystalline iron oxychloride (FeOCl) nanosheets at ambient conditions. Well‐dispersed spherical gold (Au) nanoparticles (NPs) are simultaneously decorated on surface the FeOCl nanosheets, which possess (010) preferred orientations with microsized dimensions planar and tens nanometers thickness. The size composition Au/FeOCl can be effectively modulated by simply...

Fast and sensitive detection of gaseous volatile organic compounds (VOCs), based on surface-enhanced Raman spectroscopy (SERS), is still a challenge due to their weak interaction with plasmonic metals overly small scattering cross sections. Herein, we propose simple strategy achieve the SERS-based highly efficient trace benzene-VOCs (B-VOCs) composite chip. The chip designed fabricated via covering porous zinc oxide gold nanoarrays by one-step solution growth method. Such shows selective...

Abstract While cobalt (Co) exhibits a comparable energy barrier for H * adsorption/desorption to platinum in theory, it is generally not suitable alkaline hydrogen evolution reaction (HER) because of unfavorable water dissociation. Here, the Kirkendall effect adopted fabricate positive‐charged hollow metal Co (PHCo) nanoshells that are stabilized by MoO 2 and chainmail carbon as electron sink. Compared zero‐valent Co, PHCo accelerates dissociation changes rate‐determining step from Volmer...

Practical application of surface-enhanced Raman spectroscopy (SERS) is greatly limited by the inaccurate quantitative analyses due to measuring parameter's fluctuations induced different operators, spectrometers, and test sites moments, especially during field tests. Herein, we develop a strategy SERS for detection via designing structurally homogeneous ordered Ag-coated Si nanocone arrays. Such an array fabricated as chips depositing Ag on template etching-induced array. Taking...

Abstract Integrating real‐time electrical gas sensing and highly identifiable surface‐enhanced Raman spectroscopy (SERS) for volatile organic compounds (VOCs) monitoring holds significant potential safeguarding public health safety. However, this technique remains in the proof‐of‐concept stage because performance reproducibility of devices fall short meeting practical application requirements. This work addresses challenge by employing vortex engineering on a bifunctional dual‐layer array...

To address the challenges of precise identification and real-time monitoring hazardous chemicals, this work proposes develops surface-plasmon-enhanced dual spectroscopies (SPEDS). This technique combines highly recognizable surface-enhanced Raman spectroscopy (SERS) with plasmon-mediated differential ultraviolet-visible (P-DUS). The feasibility is demonstrated by successfully acquiring SPEDS signals thiourea a plasmonic gold colloidal system. By combining machine learning algorithms, we...

A facile and general strategy is presented for homogenous ultrathin metal sulfide wrapping on plasmonic (PM) nanoparticles (NPs) based a thiourea-induced isotropic shell growth. This typically implemented just via adding the thiourea into pre-formed PM colloidal solutions containing target ions. The validity of this demonstrated by taking wrapped NPs with Au core CuS or Au@CuS as an example. They are successfully fabricated Cu2+ NP solution. layer highly (<10% in relative standard deviation...

Lead oxide (PbO) nanosheets are of significance in the design functional devices. However, facile, green, and fast fabrication ultrathin homogenous PbO with a chemically clean surface is still desirable. Herein, simple route developed for fabricating such via laser ablation lead target water short time then ambient aging. The obtained (002)-oriented microsize planar dimension ∼15 nm thickness. They mostly hexagonal shape. Experimental observations morphological evolution have revealed that...

A flexible route is presented for the controlled decoration of Au nanoparticles (NPs) on spherical MoS2 particles, just by dropping HAuCl4 aqueous solution into hydrothermal reaction-induced colloidal at room temperature. In absence surfactants in solution, it has been found that obtained products are mostly MoS2/Au Janus which hemispherical particles separately attached single spheres about 100 nm size. The built ultrafine NPs (<10 nm) and comparable to Further experiments have revealed...

A flexible route is developed for fabrication of large area α-Cu2S nanorod arrays (NRAs) on the basis one-step laser ablation a copper foil in CS2 liquid. It has been demonstrated that obtained products are high-temperature phase and consist nanorods vertically standing Cu foil, exhibiting array. The were about 1 μm length around 100 nm thickness built by stacking nearly spherical ⟨110⟩-oriented nanoparticles (NPs) up. Such array can be peeled off from remain freestanding. Further, it found...

Silver (Ag)-based Janus nanoparticles (NPs) are of broad interest for extensive applications due to their excellent photoelectric performances and special structure. However, it still remains challenging prepare this type NP with high uniformity in a large scale. Here, we present facile wet-chemical strategy synthesize Ag-MoS2 NPs via adding an appropriate amount AgNO3 into the MoS2 nanosphere (200 nm size)-contained aqueous solution. These represent new heterogeneous nanostructure. Each is...

A facile Mars–van-Krevelen mechanism-based blackening (or enhancing the optical absorption in visible region) method of nano-sized white semiconducting oxides (N-WSOs) is presented for enhanced solar utilization <italic>via</italic> heating N-WSOs with alcohols.

More molecules mean a stronger signal for surface-enhanced Raman spectroscopy (SERS), as usually expected. However, this is not always true in many cases. The factual molecular concentration dependence of the SERS intensity has been controversial and confusing. Here, we present chemical interface damping (CID)-induced attenuation mechanism to reveal it based on electromagnetic theory experimentally demonstrate its validity. It revealed that result competition between two opposite effects...

A very simple route is developed for fast fabrication of nanosized amorphous titanium dioxide (TiO2) hollow spheres (THPs) just via dropping the pure four chloride (TiCl4) liquid droplets into deionized water at around room temperature. The THPs, 80 nm in mean diameter, can be formed within a few seconds after TiCl4 water. shell layers obtained THPs are and porous structure with porosity 58-80% show linear increase thickness size THPs. Further experiments have revealed that reaction...

Spherical MoS2 nanoparticles are fabricated by laser ablation of target in water. The obtained mostly nearly perfectly spherical shape with smooth surface, and tens to hundreds nanometers diameters. Such built concentrically curved {002} planes show onion-like structure. Further examination has revealed that there exist shrinkage cavities (or voids) the central part or small pores dispersed particles a few tadpole-like long-tailed products, indicating marks melting molten liquid droplets'...

A new strategy – ultrathin layer solid transformation-enabled-SERS is presented for rapid and ultrasensitive detection of harmful small gaseous molecules.

Efficient detection of sulfide ions (S2-), especially in a wide quantitative range, is significance but faces challenges. This work strategizes and fabricates Au@CuO nanoparticles for surface-enhanced Raman spectroscopy (SERS) the S2- based on concentration-dependent ion-solid interactions. We have achieved fast range from 5 ppb to 64,000 ppm (saturation concentration source). also demonstrated that optimal CuO shell thickness about 7 nm can be further improved by prolonging soaking...

Molecular-level understandings of gas sensing mechanisms oxide-based chemiresistors are significant for designing high-performance sensors; however, the still controversial due to lack direct experimental evidence. This work demonstrates efficient in situ surface-enhanced Raman spectroscopy (SERS) tracing highly representative SnO2-ethanol using Au@SnO2 nanoparticles (NPs), where Au core and SnO2 shell provide SERS activity a response, respectively. The evidence suggests that follows...

Controllable and flexible fabrication of ultrathin uniform oxide layer-wrapped noble metal nanoparticles (NPs) has been expected. Here a new strategy is presented for them based on colloidal electrostatic attraction self-assembly the NPs via one-step laser ablation targets in hydrolysis-induced hydroxide sol solutions at room temperature. The Au NPs, with several tens nanometers size, are taken as core part TiO2 shell-layer to demonstrate validity strategy. It shown that shell-wrapped...

Accurate and efficient gas monitoring is still a challenge because the existing sensing techniques mostly lack specific identification of gases or hardly meet requirement real-time readout. Herein, we present strategy conductometric response-triggered surface-enhanced Raman spectroscopy (SERS) for such monitoring, via designing using ultrathin oxide-wrapped plasmonic metal nanoparticles (NPs). The oxide wrapping layer can interact with capture target gaseous molecules produce response, while...