Surface-enhanced Raman scattering (SERS) substrates based on chemical mechanism (CM) have received widespread attentions for the stable and repeatable signal output due to their excellent stability, uniform molecular adsorption controllable orientation. However, it remains huge challenges achieve optimal SERS diverse molecules with different band structures same substrate. Herein, we demonstrate a graphene oxide (GO) energy regulation strategy through ferroelectric polarization facilitate...

Abstract Regulation of hot spots exhibits excellent potential in many applications including nanolasers, energy harvesting, sensing, and subwavelength imaging. Here, hat-shaped hierarchical nanostructures with different space curvatures have been proposed to enhance for facilitating surface-enhanced Raman scattering (SERS) plasmon-driven catalysis applications. These novel comprise two layers metal nanoparticles separated by MoS 2 films. The fabrication this hybrid structure is based on the...

The combination of metallic nanoparticles (NPs) with semiconductors used as surface-enhanced Raman scattering (SERS) substrates have been widely reported. However, the additional enhancements provided by are impressively small and little effect on SERS signal compared that from NPs alone. Herein, thermoelectric semiconductor material gallium nitride (GaN) silver (Ag NPs) combined to create an electric-field-induced (E-SERS) substrate, which further improves intensity order magnitude without...

Actively controlling surface-enhanced Raman scattering (SERS) performance plays a vital role in highly sensitive detection or situ monitoring. Nevertheless, it is still challenging to achieve further modulation of electromagnetic enhancement and chemical simultaneously SERS detection. In this study, silver nanocavity structure with graphene as spacer layer coupled thermoelectric semiconductor P-type gallium nitride (GaN) form an electric-field-induced (E-SERS) for dual enhancement. After...

Abstract The fabrication of reusable SERS substrates with sensitivity at the single‐molecule level remains challenging but promising. Herein, a composite surface‐enhanced Raman scattering (SERS) substrate is proposed that includes Ag nanoparticle (Ag NPs) /Graphene/BaTiO 3 (Ag/G/BTO) from chemical enhancement perspective. pyroelectric field generated by BaTiO drives charge transfer between and molecules, achieving significant improvement in performance self‐cleaning properties. signals...

Electric-induced surface-enhanced Raman scattering (E-SERS) has been widely studied for its flexible regulation of SERS after the substrate is prepared. However, enhancement effect not sufficiently high in E-SERS technology reported thus far, and no suitable field application exists. In this study, a highly sensitive thermoelectrically induced substrate, Ag/graphene/ZnO (AGZ), was fabricated using ZnO nanoarrays (NRs), graphene, Ag nanoparticles (NPs). Applying temperature gradient to NRs...

We report in this work that quantum efficiency can be significantly enhanced an ultra-thin silicon solar cell coated by a fractal-like pattern of silver nano cuboids. When sunlight shines cell, multiple antireflection bands are achieved mainly due to the self-similarity structure. Actually, several kinds optical modes exist One is cavity modes, which come from Fabry-Perot resonances at longitudinal and transverse cavities, respectively; other surface plasmon (SP) propagate along...

MXenes are attractive candidates in the fields of surface-enhanced Raman scattering (SERS) and catalysis. However, most current studies on based blocks nanosheets, limiting their SERS catalytic properties. Herein, we have prepared 3D MXene hollow spheres wrapped with silver nanoparticles (Ti3C2–AgNP HSs) using a sacrificial template method, which exhibits excellent sensitivity low detection limit due to good light-trapping capability sphere strong localized surface plasmon resonance (LSPR)...

Recently, multiscale cavity arrays have drawn significant attention due to their excellent optical capturing capability. Here, we successfully constructed a grating microcavity with nanowire structure that the nanoscale copper oxide nanowires (CuO NWs) silver nanoparticles (Ag NPs) introduced into micrometer structure, which can provide large surface area and high-density "hot spots", ability couple incident light excite modes. We demonstrated poly(dimethylsiloxane) (PDMS)/grating/CuO NWs/Ag...

This paper presents a pyroelectric PMN-PT composite plasmonic Ag NP SERS substrate, whose initial signal is further greatly enhanced under the action of potential, with dominant chemical mechanism.

Electric field-induced surface-enhanced Raman scattering (E-SERS) substrates have been proven to further enhance the attained intensity. Herein, integrated with plasmonic Ag nanoparticles (Ag NPs), thermoelectric Bi2Te3 plate as an E-SERS substrate decreased limit of detection by 2 orders magnitude and increased SERS signal >20 times compared those without electrical field induction. The potential produced could modulate electron density subsequently change Fermi level Ag. This increases...

The simultaneous output of highly sensitive and reproducible signals for surface-enhanced Raman spectroscopy (SERS) technology remains difficult. Here, we propose a two-dimensional (2D) composite structure using the repeated annealing method with MoS 2 film as molecular adsorbent. This provides enlarged Au nanoparticle (NP) density much smaller gap spacing, thus dramatically increases intensity hot spots. films distribute among spots, which is beneficial uniform adsorption, further...

Red mud is a polluting waste product emitted from the aluminum production industry, which potential threat to environment due its high yield, strong alkalinity and complex elemental composition. The resource utilization of red has also attracted attention many researchers. In this study, mud, straw bentonite were used as raw materials prepare granular porous zero valent iron (ZVI) adsorption reaction (Fe/GSBR) by carbothermal reduction. Straw was pore-forming reducing agent, binder,...

The rhenium disulphide (ReS 2 ) nanocavity-based surface enhanced Raman scattering (SERS) substrates ware fabricated on the gold-modified silicon pyramid (PSi) by thermal evaporation technology and hydrothermal method. In this work, ReS nanocavity was firstly combined with metal nanostructures in order to improve SERS properties of materials, response composite structure exhibits excellent performance sensitivity, uniformity repeatability. Numerical simulation reveals synergistic effect...

Putrescine and cadaverine are significant volatile indicators used to assess the degree of food spoilage. Herein, we propose a micro-nano multi cavity structure for surface-enhanced Raman spectroscopy (SERS) analyze gas putrescine in decomposing food. The MoS 2 nano-flowers inserted into PVDF micro-cavity through in-situ growth, followed by vacuum evaporation technology Ag nanoparticles form an Ag/MoS nano-flower cavity/PVDF micron-bowl (FIB) substrate. can improve capture capacity both...

In this work, we have experimentally and theoretically studied band modulation in-plane propagation of surface plasmons (SPs) in composite nanostructures with aperture arrays metallic gratings. It is shown that the plasmonic structure system can be significantly modulated because coupling between grating. By changing relative positions these optical components, resonant modes would shift or split. And SP launched on effectively modified by geometric parameters. Further, provide an...

MoS2-plasmonic hybrid platforms have attracted significant interest in surface-enhanced Raman scattering (SERS) and plasmon-driven photocatalysis. However, direct contact between the metal MoS2 creates strain that deteriorates electron transport across metal/ interfaces, which would affect SERS effect catalytic performance. Here, MoS2/graphene van der Waals heterojunctions (vdWHs) were fabricated combined with two-layered gold nanoparticles (Au NP) for photocatalysis analyse. The graphene...

Film wrap nanoparticle system (FWPS) is proposed and fabricated to perform SERS effect, where the Ag was completely wrapped by Au film double-layered graphene selected as sub-nano spacer. In this system, designed nanostructure can be fully rather than partly used generate hotspots absorb probe molecules, compared (PTPS) or (PTFS). The optimal fabricating condition performance of were studied COMSOL Multiphysics. simulation results show that strongly large-scale localized electromagnetic...

Recently, multiscale cavity arrays have drawn significant attention due to excellent optical capturing capability. Here, we successfully constructed a grating microcavity nanowire structure that nanometer scale copper oxide nanowires (CuO NWs) with silver nanoparticles (Ag NPs) introduced into the micrometer structure, which can provide large surface area and high-density “hot spots”, ability couple incident light excite multistage equipartition exciton modes. We demonstrated...