15 results about "Metallic nanostructures" patented technology

The invention relates to the technical field of masks, and discloses an exhaled air condensate intelligent detection mask based on SERS technology, the exhaled air condensate intelligent detection mask comprises a condensate collection module, an SERS sensing module and a mask assembly, the condensate collection module comprises an EBC collection layer and a hydrogel antibacterial and refrigeration device, the EBC collection layer adopts a microfluidic microneedle array channel design, and the hydrogel antibacterial and refrigeration device is connected with the SERS sensing module. The SERS sensing module is used for condensing exhaled air into liquid, eliminating the influence of external bacteria and directionally conveying the exhaled air to a detection area, and the SERS sensing module is composed of a flexible substrate loaded noble metal nanostructure (a pH detection substrate, a malondialdehyde detection substrate, a NO2-detection substrate and a H2O2 detection substrate). By means of the intelligent mask, multiple EBC components such as the pH value, malondialdehyde, NO2 <-> and H2O2 can be detected at the same time, the limitation that an existing sensor is single in detection component is avoided, and the detection efficiency is improved; moreover, the design of the sensor ensures the stable operation of the sensor in a complex physiological environment, and ensures the reliability and accuracy of a detection result.

The invention belongs to the technical field of semiconductors and micro-nano photoelectrons, and particularly discloses a silicon-Dirac semimetal heterojunction avalanche photodetector integrated with a metal nano filtering structure and a preparation method of the silicon-Dirac semimetal heterojunction avalanche photodetector, and the silicon-Dirac semimetal heterojunction avalanche photodetector sequentially comprises a metal nano structure layer, a Dirac semimetal-silicon heterojunction layer, a multiplication layer and a substrate layer from top to bottom. According to the photoelectric detector prepared by the invention, the expansion of a near-infrared band and the enhancement of the photoelectric response of a visible light band are realized through the silicon-Dirac semimetal layer heterojunction. The metal nanostructure realizes response to a target narrow-band wave band of incident light, and has the advantages of selectable wavelength, miniaturization, easy integration and the like.

The embodiment of the present application provides a kind of light perception structure group, spectral imager and its use method.The light perception structure group includes hot light detector, including at least one feature unit structure, the feature unit structure includes multiple metal nano structures;And mobile device, including at least one moving component, the moving component is set to one-to-one group corresponding with the feature unit structure;The moving component is set to drive the feature unit structure to move, to change the relative position of the feature unit structure and the light source to be detected.The light perception structure group provided in the embodiment of the present application is set by moving component, and the feature unit structure is moved by moving component, to change the relative position of the feature unit structure and the light source to be detected, reduces the structural complexity of spectral imager, and realizes the perception of spectrum in ultra-wideband range.

The application relates to a zeolite-based SERS composite substrate material and a preparation method and application thereof, wherein the SERS composite substrate material is a double-layer structure, the lower layer is a zeolite with a porous structure, and the upper layer is a metal nano structure; the specific surface area of the zeolite is 400 m 2 / g-1100 m 2 / g; the nano layer thickness of the metal nano structure is 50 nm-300 nm, wherein the nano metal includes any one of metal gold, silver or a gold-silver alloy. The SERS composite substrate material can be used for detecting gas-phase system asphalt VOCs, and based on the SERS technology, the detection lower limit of typical pollutants, toluene and acetone, in the asphalt VOCs can reach 8 ppm, and the detection lower limit of 2-methylpentane can reach 6 ppm, so that the detection sensitivity is relatively high.

The invention discloses a preparation method of a copper-based surface metal nanostructure based on ultrasonic oscillation, which comprises the following specific steps: S1, pretreatment of a base material: cleaning and drying an oxygen-free copper base material to ensure that the surface is free of oil stain, dust and other pollutants; s2, preparing a precursor solution, selecting corresponding metal salt, a reducing agent and a dispersing agent according to the type of the metal nanostructure, and dissolving in an ethylene glycol solvent to form the precursor solution; s3, an ultrasonic oscillation reaction is conducted, specifically, the pretreated oxygen-free copper is immersed in the precursor solution, oscillation is conducted through an ultrasonic oscillation device, and metal ions are evenly deposited on the surface of the oxygen-free copper; and S4, post-treatment is conducted, specifically, the sample is taken out, cleaned and dried, and the oxygen-free copper substrate with the uniform metal nanostructure on the surface is obtained.The method solves the problem of compatibility of the multi-metal nanostructure and has the advantages of being compact in process, low in energy consumption and high in structural uniformity.

The present application provides a device for making labels corresponding to respective kinds of bacteria or viruses, and detecting bacteria and / or viruses in a test object based on the properties of the labels. A DPV detection device (1) includes: an electrode chip (20); a voltage application unit (105) that applies a voltage in a prescribed range to the electrode chip (20); a current measurement unit (106) that measures a peak current value output from the electrode chip (20) in correspondence with the applied voltage; a data storage unit (107) that stores in advance data of peak current values and applied voltage values at the time of peak current for respective kinds of metal nanostructures; a target determination unit (108) that compares the measured data of the current measurement unit (106) with the stored data, and determines a target that binds to the metal nanostructure; and a display unit (103) that displays the determined target.

The application discloses a kind of three-dimensional gray structure based on low-voltage ice glue electron beam exposure and the manufacturing method of three-dimensional micro-nano structure, comprising: depositing an ice layer on processing surface;Then using low-energy electron beam layer-by-layer exposure, remove the ice layer of each layer specific part, finally form three-dimensional gray ice sculpture structure with specific gray pattern;Optionally, three-dimensional ice sculpture structure is deposited material using physical vapor deposition, form three-dimensional micro-nano structure;The ice layer is water ice;The low-voltage electron beam energy is lower than 5keV.The application uses the characteristics of iEBL and low-energy exposure in water ice, not only can obtain three-dimensional ice sculpture structure without support structure, but also can successfully convert gray ice sculpture into high-purity three-dimensional metal structure.This breakthrough provides potential for using water ice resist to improve nanodevice manufacturing, and establishes the key technology position of iEBL in constructing fine, pollution-free three-dimensional metal nanostructure.

A method may include coating a substrate with a solution, where the solution includes one or more metal salts and a first solvent. The one or more metal salts may be configured to dissolve in the first solvent. The method may further include adding a second solvent to the coated substrate until one or more metal salt crystals precipitate over a surface of substrate. The second solvent may include an antisolvent where the one or more metal salts of the solution are insoluble in the second solvent. The method may further include performing a microwave heating process to apply microwave heat to the substrate while the second solvent is present to induce thermal decomposition of the one or more metal salts until one or more metal nanostructures are formed on the surface of the substrate.

The invention discloses a mass spectrum Lamannite combined substrate and a preparation method, relates to the technical field of analysis and detection, and provides a difunctional substrate which can support electrospray ionization mass spectrometry detection and surface enhanced Raman detection at the same time, does not interfere with each other and is suitable for on-site rapid operation. The substrate comprises a substrate film and at least one directional liquid transmission channel positioned on the surface of the substrate film, and a Raman detection area and a mass spectrum detection area are arranged in the channel; the mass spectrometry detection area is arranged at the tail end of the channel, the tail end is of a pointed structure, and a substrate film at the tail end comprises a metal conductive layer; the Raman detection area is arranged at any position, which is not overlapped with the mass spectrum detection area, in the channel, and a metal nanostructure is arranged on a substrate film of the Raman detection area and is used for realizing surface-enhanced Raman detection; after the liquid sample flows through the Raman detection area, the Raman detection device performs Raman detection on the liquid sample, and when the liquid sample flows to the mass spectrum detection area, the mass spectrum detection device performs mass spectrum detection on the liquid sample.

The invention belongs to the technical field of surface enhanced Raman spectrum detection and biomedical analysis, and particularly relates to a surface enhanced Raman spectrum sensing material based on a nano active sulfur layer as well as a preparation method and application of the surface enhanced Raman spectrum sensing material. The sensing material comprises a supporting substrate, a metal nanostructure layer and an elemental sulfur active layer which are sequentially arranged from bottom to top, the metal nanostructure layer comprises a first metal film, a dielectric ball template layer and a second metal film which are sequentially arranged from bottom to top, the first metal film is deposited on the supporting substrate, and the elemental sulfur active layer is deposited on the second metal film. By controlling sublimation deposition conditions of elemental sulfur, an ultrathin sulfur active layer which is uniform and compact and does not excessively fill nano gaps is formed on the surface of the metal and alloy nano array of the metal, and a high-affinity reaction interface for various heavy metal ions is introduced while a plasma'hot spot 'structure is ensured. The low-wave-number fingerprint detection of various heavy metal ions in a biological sample is realized.

The invention discloses a trace SERS (Surface Enhanced Raman Scattering) detection micro-fluidic chip based on on-chip waveguide integrated optical tweezers, and relates to the technical field of micro-fluidic chips and spectrum detection. The chip comprises a substrate, an on-chip optical waveguide system, an optical tweezer nano focusing unit, a metal nanostructure SERS active layer, a microfluidic channel system and an optical signal coupling and detecting module, the on-chip optical waveguide system, the optical tweezer nanometer focusing unit and the metal nanometer structure SERS active layer are integrated on the substrate to form a waveguide layer, the microfluidic channel system is bonded above the waveguide layer, and the optical signal coupling and detecting module is connected with the on-chip optical waveguide system. A light field is transmitted through the on-chip optical waveguide, the optical tweezers unit focuses the light field to form an optical potential well to capture a target, the metal active layer and the light field are coupled to amplify an SERS signal, the microfluidic channel conveys a sample, the detection module realizes excitation light input and signal output, and the problems that traditional SERS detection is low in integration level, insufficient in sensitivity and the like are solved.

The present invention relates to a negative electrode for a lithium-free secondary battery, which can reduce galvanic corrosion and side reactions on the negative electrode and achieve uniform electrodeposition of lithium metal while being made lightweight and thin, and a method for manufacturing the same, in which the negative electrode for a lithium-free secondary battery is characterized by comprising: a porous metal layer having a three-dimensional microstructure, and a conductive carbon nanostructure formed on the porous metal layer, in which the porous metal layer includes a metal mesh layer in which a fibrous metal having a micron-sized diameter forms a mesh structure, and a metal nanostructure formed on the fibrous metal, and at least a portion of the metal nanostructures are connected to each other to define a plurality of pores on the porous metal layer.

The present invention relates to nanostructure-bonding partner conjugates, as well as reaction mixtures, analyte detection devices, and methods for fabricating and using conjugates. [Solution] In particular, the present invention provides a method for detecting a target analyte in a sample, comprising the step of mixing the sample with a first detection conjugate and a second detection conjugate in a solution, wherein the first and second detection conjugates include metal nanostructures linked to binding partners that can specifically bind to the target analyte when it is present in the sample, forming a complex between the first detection conjugate and the analyte and the second detection conjugate, and the change in optical signal during complex formation indicates the presence of the target analyte in the sample.

A high-speed fluorescent antenna device based on template transfer and a preparation method thereof, the device comprising a substrate and a fluorescent conversion layer, the fluorescent conversion layer being located on the substrate, characterized in that the fluorescent conversion layer comprises fluorescent powder, a separation layer and regular metal nanoparticles; the regular metal nanoparticles are formed on the surface of the substrate by template transfer, and are metal nanostructures arranged in a periodic array in a horizontal direction; the separation layer is located between the regular metal nanoparticles and the fluorescent powder, and is used for balancing the radiation decay rate and the fluorescence quenching effect, and the regular metal nanoparticles and the fluorescent powder are coupled through surface plasmon resonance. The present application changes the non-radiative loss of quantum dots, realizes the ultrafast radiation of fluorescent materials, and finally shortens the fluorescent light-emitting life.

Provided are a component carrier and a method for manufacturing thereof. The component carrier has a stack with at least one electrically conductive layer structure and at least one electrically insulating layer structure. At least one surface of the at least one electrically conductive layer structure is divided in at least one first portion and at least one second portion, with the at least one first portion and the at least one second portion being adjacent one to the other. The at least one first portion has a higher conductivity with respect to that of the at least one second portion. Metallic nanostructures and / or microstructures are provided on the at least one first portion.