39 results about "Metallic nanostructures" patented technology

Embodiments described herein relate to a bi-functional thermal cooling system. The bi-functional thermal cooling system includes a first body, a second body, and a third body. The second body has a first plurality of Weyl semimetal nanostructures. The second body is spaced apart from the first body. The third body has a second plurality of Weyl semimetal nanostructures. The third body is spaced apart from the second body. The second body and the third body are each configured to independently rotate with respect to the first body to change an optical property of the first plurality of Weyl semimetal nanostructures of the second body and an optical property of the second plurality of Weyl semimetal nanostructures of the third body.

The invention discloses a manufacturing method of a three-dimensional gray scale structure and a three-dimensional micro-nano structure based on low-voltage ice gel electron beam exposure. The manufacturing method comprises the following steps: depositing an ice layer on a processing surface; then, low-energy electron beam layered exposure is utilized, the ice layer of the specific part of each layer is removed, and finally a three-dimensional gray scale ice sculpture structure with a specific gray scale pattern is formed; selectively depositing a material on the three-dimensional ice sculpture structure by adopting physical vapor deposition to form a three-dimensional micro-nano structure; the ice layer is water ice; and the energy of the low-voltage electron beam is lower than 5keV. According to the method, a three-dimensional ice sculpture structure without a supporting structure can be obtained by utilizing the characteristics of iEBL and low-energy exposure in water ice, and gray scale ice sculpture can be successfully converted into a high-purity three-dimensional metal structure. The breakthrough provides potential for improving nano device manufacturing by adopting a water ice resist, and establishes a key technical position of the iEBL in construction of a fine and pollution-free three-dimensional metal nano structure.

The present invention relates to a micropixel display device and a method for fabricating a meta-absorber-based black matrix of a micropixel display device. The micropixel display device according to the present invention is characterized by comprising a light-reflecting metal layer formed of a light-reflecting metal material, a light-transmitting non-metal insulating layer formed on the light-reflecting metal layer using a light-transmitting non-metal insulating material, and a metal nanostructure layer formed of a light-reflecting metal material in a black matrix region separating subpixels on the light-transmitting non-metal insulating layer, wherein nanostructures of different sizes having different resonant wavelengths in a broadband of visible light are spacedly arranged, and a meta-absorber-based black matrix.

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.

Liposomes are leveraged to function as sacrificial templates for the growth of mesoporous nanostructures constructed with noble metals and other metals. Such templates allow for programmability for the specific distribution of metals and their properties while generating mesopores within the formed nanostructures. Ascorbic acid or other reductant is introduced to the sacrificial template for the reduction of metallic precursors. Once metallic precursors are added, the reductant finishes the reduction reaction to form the metallic nanostructures. Such nanostructures can have outside-in mesopores and pore diameters in the range of 10 nm to 50 nm.

Liposomes are leveraged to function as sacrificial templates for the growth of mesoporous nanostructures constructed with noble metals and other metals. Such templates allow for programmability for the specific distribution of metals and their properties while generating mesopores within the formed nanostructures. Ascorbic acid or other reductant is introduced to the sacrificial template for the reduction of metallic precursors. Once metallic precursors are added, the reductant finishes the reduction reaction to form the metallic nanostructures. Such nanostructures can have outside-in mesopores and pore diameters in the range of 10 nm to 50 nm.

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 present invention relates to a diffuser (3) opposite to a light source (1), which comprises a transmission layer (10) and a diffusing layer (22, 23) that scatters the light emitted by the light source. The diffuser is characterized in that the diffusing layer comprises a plurality of metal structures (200, 200a, 200b) called metal nanostructures, the size of which is smaller than the wavelength of the emitted light; the metal nanostructures have various sizes and are distributed in the diffusing layer such that the distance between adjacent metal nanostructures varies and is preferably smaller than the wavelength of the emitted light. The diffuser (3) according to the present invention enables the optimization of the scattering of the light emitted by the light source (preferably a point light source). The present invention also relates to a method for manufacturing such a diffuser, and a display system comprising such a diffuser.

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 present invention relates to metal nanostructures (e.g., Cu) on unconventional phase TMD, and electrochemical methods for the controlled growth of various Cu nanostructures, including monatomic dispersed Cu (s-Cu), amorphous Cu (a-Cu) nanoclusters, and crystalline Cu (c-Cu) nanoparticles, on 1T 'WS2 nanosheets. The process enhances the efficiency and selectivity of a catalyst for the electrochemical upgrade of nitrate water to ammonia, achieving a Faraday efficiency (FE) of at least 98% ammonia at-0.8 V relative to RHE. Researches show that high performance derives from synergism between a Cu site and a 1T 'WS2 carrier, and effective hydrogenation and ammonia production are promoted. The Cu / 1T 'TMD nanostructure is wide in application and can be applied to various catalysis fields.

The present invention discloses a design method for a highly sensitive biochiral molecule detection device based on reinforcement learning. The detection device processes a metal nanostructure at the bottom of a microfluidic channel, and realizes the sensing of biochiral molecules by characterizing the coupling signal between the metal nanostructure and the biochiral molecule. In order to obtain a metal nanostructure that matches the target chiral molecule, the present invention uses reinforcement learning technology to search the parameter space of the geometric configuration of the metal nanostructure to obtain a metal nanostructure with high chirality. This design method fully realizes the intelligent optimization of nanophotonic devices, and has the advantages of high degree of freedom, strong robustness, wide range of applications, and fast calculation speed, and has important guiding significance for the design of other multifunctional optical devices. The biochiral molecule detection device based on a microfluidic chip designed by the present invention has multiple advantages such as real-time monitoring, reusability, and high sensitivity, and has extremely high use value.

The present invention relates to an electrocatalyst comprising a Ti substrate coated with a 3D Cu nanostructured matrix decorated with a mixture of amorphous TiO2 and nanoparticles of a noble metal, preferably Pt nanoparticles, an electrochemical cell comprising said electrocatalyst and their use for hydrogen production via hydrogen evolution reaction (HER) in basic conditions. The present invention also refers to an in situ process for the preparation of said electrocatalyst and simultaneous production of hydrogen, comprising the steps of: (a) providing an electrochemical cell having a 3-electrode configuration comprising a starting working electrode which comprises a Ti substrate coated with vertically oriented CuO nanoplatelets, the cell further comprising a counter electrode and a reference electrode; (b) adding an aqueous basic electrolyte solution to the cell of step (a), said aqueous basic electrolyte solution comprising a precursor of a noble metal, preferably a Pt precursor; (c) applying a negative potential with respect to the reference electrode to the cell of step b).The present invention also refers to a process for producing hydrogen which utilizes the electrochemical cell comprising the electrocatalyst according to the invention.

The invention relates to a preparation method and application of an electrochemical deposition metal nanostructure film based on air gold plating. The method is based on an electric capillarity phenomenon and electrochemical deposition, metal particles in a plating solution are pulled into air to carry out electrooxidation of metal through the action of an electric field by adopting a mode that an electrode base material is immersed in the plating solution at a low level, electrons are obtained on the surface of a semiconductor or metal so as to form a metal simple substance, and then the metal nanostructure film is generated. Due to the vacancy effect of hydrogen ions and the deposition mode of heterogeneous nucleation of gold particles, a porous gold nanostructure is formed. Meanwhile, the current direction is perpendicular to the metal deposition direction, so that the formed nanostructure is very thin. The gold nanostructure film developed by the invention can reduce the impedance of the electrode, not only has an antibacterial effect, but also reduces the inflammatory reaction after being implanted into a body, and is suitable for surface modification of an implantable biological electrode.

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 invention relates to nanostructure-binding partner conjugates, as well as reaction mixtures, analyte detection devices, and methods of making and using the conjugates. In particular, the present invention provides a method of detecting a target analyte in a sample comprising mixing the sample with a first detection conjugate and a second detection conjugate in a solution wherein the first detection conjugate and the second detection conjugate comprise a metal nanostructure coupled to a binding partner, if the target analyte is present in the sample, the binding partner is capable of specifically binding to the target analyte to form a complex between the first detection conjugate, the analyte, and the second detection conjugate, wherein a change in the light signal upon formation of the complex is indicative of the presence of the target analyte in the sample.

The invention discloses a micro-nano structure for regulating and controlling surface plasmon resonance wavelength based on laser induction and a preparation method of the micro-nano structure. According to the technology, an M-SAM-M structure composed of a metal substrate, a self-assembled monomolecular layer (SAM) and metal nano-particles is constructed through molecular interface engineering, selected molecules such as 4-fluorothiophenol, 4-chlorophenylmercaptan and 4-bromophenylmercaptan serve as gap materials for accurately defining the size of a nano gap in the assembling process, and due to the fact that the molecules are short in length, the size of the nano gap can be accurately defined. Compared with the prior art, the method has the characteristics that a compact single layer is easily formed and the static polarizability is relatively large, a dipole layer is formed under the action of a local electric field, the optical force is enhanced, gold atoms on the surfaces of nano-particle gaps are induced to migrate, and then non-contact and rapid (1-10 seconds) regulation and control of resonant wavelength are realized. By adopting a laser irradiation technology at normal temperature and pressure, the method provided by the invention not only overcomes the limitation of a traditional adjustment method depending on a geometric structure and reduces the preparation difficulty, but also realizes high-precision, large-scale and low-cost preparation of the metal nanostructure, and provides powerful support for development of novel optical electronic devices.

The present invention relates to a topological semimetal nanostructure TaAs nanowire and a preparation method thereof, belonging to the technical field of nanomaterials. Raw materials TaCl5 and As are weighed according to the mass ratio of TaCl5:As being 1:1.5 - 3, and are placed in the sample boat at intervals; the sample boat and the gold-plated silicon wafer are placed in a glass tube; the glass tube is placed in a dry quartz tube, sealed, and argon and hydrogen are introduced to adjust the air pressure, and then the quartz tube is placed in a tube furnace. First, it is heated from room temperature to 940 - 960 °C and kept warm for 10 - 30 min, and then cooled to 700 ± 5 °C and naturally cooled to obtain the TaAs nanowire in the quartz tube. The non-cleavable Weyl semimetal TaAs is directly grown on the silicon wafer by chemical vapor deposition to realize the synthesis of TaAs nanowires.

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 present invention relates to metallic nanostructures (e.g., Cu) on unconventional-phase TMDs, and an electrochemical method for the controlled growth of various Cu nanostructures, including single-atomically dispersed Cu (s-Cu), amorphous Cu (a-Cu) nanoclusters, and crystalline Cu (c-Cu) nanoparticles on 1T′ WS2 nanosheets. This method enhances the efficiency and selectivity of catalysts for the electrochemical upcycling of nitrate water into ammonia, achieving a Faradaic efficiency (FE) of at least 98% for ammonia at −0.8 V vs. RHE. Investigations reveal that the high performance arises from the synergistic cooperation between Cu sites and 1T′ WS2 supports, facilitating efficient hydrogenation and ammonia production. The Cu / 1T′ TMDs nanostructures are versatile and can be applied in various catalytic fields.

The present invention relates to a system and a method for manufacturing a metal nanostructure. According to the present invention, the system for manufacturing a metal nanostructure comprises: a heat treatment unit for applying heat treatment to a substrate on which a metal thin film is formed; a measurement unit for measuring spectroscopic data of a nanostructure formed on the substrate as the heat treatment is applied by the heat treatment unit; a classifier, which receives the spectroscopic data measured by the measurement unit, so as to classify the specification of the nanostructure; and a control unit for controlling an operation of the heat treatment unit according to the classification results of the classifier. According to the present invention, when a metal nanostructure is manufactured, the metal nanostructure having a specific specification can be more elaborately manufactured by receiving feedback of spectroscopic measurement data. In addition, spectroscopic characteristics can be analyzed by artificial intelligence, thereby facilitating data analysis of a spectroscopy-based medical device and optical biosensor.

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 discloses a method and control method of using electron beam to excite the optical spin Hall effect. Plasmon resonance is generated by bombarding metal nanostructures with electron beams, so that the radiation directions of left-handed circularly polarized components are separated to excite the optical spin Hall effect. The presence or absence of the optical spin Hall effect and the switching of the radiation directions of left-handed circularly polarized light can be realized by moving the electron beam to change the excitation area, thereby realizing the control of the optical spin angular momentum. The present invention uses electron beam incidence to generate the optical spin Hall effect for the first time, breaks through the optical diffraction limit through the ultra-high spatial resolution of the electron beam, realizes the detection of the optical spin Hall effect at the sub-wavelength scale, greatly reduces the control scale of the photon spin angular momentum degree of freedom, has the characteristics of small scale, high sensitivity, strong robustness, etc., and can be applied to the fields of optical spin and orbit coupling research, nanophotonics information carrier research, and quantum information device integration.

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 while being lightweight and thin and enables uniform electrodeposition of lithium metal, and a manufacturing method therefor, wherein 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, wherein the porous metal layer comprises a metal mesh layer in which a fibrous metal having a micron-scale diameter forms a network structure, and a metal nanostructure formed on the fibrous metal, and at least some parts of the metal nanostructure are connected to each other to define a plurality of pores on the porous metal layer.

The invention discloses a metal double-helix nanowire, a preparation method thereof and a circular polarization modulator, the preparation method comprises the following steps: stacking metal sheets on a template, and ballasting to obtain a complex, the template having double-helix nanopores; and the template in the complex is removed, and the metal double-helix nanowire is obtained on the metal sheet. According to the method, a metal confinement superplastic deformation means is adopted, the metal sheet is ballasted on the double-spiral-hole template, the single-crystal metal nanostructure is formed in the holes of the double-spiral-hole template, and compared with a traditional micro-nano machining technical scheme, operation is easy, the manufacturing cost is reduced, uniformity is good, functionality is high, and the method is suitable for large-scale production. And the method plays a very important role in improving the emission and transmission efficiency of the circular polarization signal. The metal double-helix nanowire prepared by the invention can realize circular polarization luminescence with an asymmetry factor greater than 0.5, and the circular polarization waveguide distance is 2 microns.

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.