100 results about "Nanowire array" patented technology

The invention relates to an optical fiber hydrogen sensor based on a silver film-nanowire hole array structure and a preparation method thereof in the field of photochemical sensors. The optical fiber hydrogen sensor comprises a multimode optical fiber, and a sensing area is formed on the multimode optical fiber; the sensing area is formed by stripping a coating layer with a preset length from the multimode optical fiber, thinning the optical fiber in the area, plating a silver film on the surface of the thinned optical fiber, and adsorbing a nanowire hole array structure which is sequentially and vertically arranged on the surface of the silver film in a liquid level self-assembly manner; the nanowire hole array is of a metal-medium-metal (MIM) structure, a gold-palladium nanowire array is arranged at the bottom, an intermediate medium layer is made of aluminum oxide, and a silver film with a hole array in any shape is arranged at the top. When light is transmitted to a sensing area from a fiber core of the multimode optical fiber, the light and a metal silver film can excite a surface plasmon resonance (SPR) effect, meanwhile, an MIM structure formed by a gold-palladium nanowire, an aluminum oxide dielectric layer and a porous silver film serves as an optical coupling antenna through a local surface plasmon resonance (LSPR) effect at the edge of a top hole, and the optical coupling antenna is used for transmitting the light to the sensing area. Light energy is efficiently converged and excited in an extremely bound gap plasmon (Gap Plasmon) in an aluminum oxide dielectric layer, so that far-unconventional electromagnetic field enhancement is generated in a sensing core area, and the sensitivity of the sensor is greatly improved.

The invention discloses a deep ultraviolet LED epitaxial structure, a deep ultraviolet LED device comprising the same and a preparation method, and the epitaxial structure sequentially comprises a sapphire substrate, an AlN nanowire array layer, an AlN intrinsic layer and an AlGaN light-emitting structure layer from bottom to top. The AlGaN light-emitting structure layer further comprises an n-type AlGaN electron injection layer, a quantum well active layer, a p-type AlGaN electron blocking layer and other device structures. According to the invention, the vertically arranged AlN nanowire array is introduced to replace a traditional AlN buffer layer, so that lattice mismatching stress caused by a substrate is significantly released, and the dislocation density of an epitaxial layer is effectively reduced; meanwhile, the introduction of the AlN intrinsic layer further flattens the epitaxial interface and optimizes the lattice quality, thereby providing a high-quality template for the growth of a high-performance AlGaN material. The epitaxial structure is suitable for an LED device in a deep ultraviolet band, and the crystal quality, the electrical property and the luminous efficiency of the device can be improved.

A MEMS gas sensor and a preparation method therefor, comprising an insulating substrate (1), a heating electrode (403), an insulating layer (105) and a testing unit, which are overlappingly disposed. The testing unit comprises a testing electrode, a sensing unit (2), and a selective separation membrane (3); the sensing unit (2) has a nanowire array structure formed by multiple nanowires disposed at intervals, and the selective separation membrane (3) covers the surface of the sensing unit and a recessed portion; the nanowires comprise a first metal and a second metal, the first metal being Pd, and the second metal being at least one selected from Ni, Cu, Ag, Au and Ir; the selective separation membrane (3) comprises an inner separation membrane (301) and an outer separation membrane (302) which are stacked in sequence; the inner separation membrane (301) comprises polytetrafluoroethylene, and the outer separation membrane (302) is a mixed matrix membrane having a covalent organic framework material as a filler and a polymer of intrinsic microporosity as a matrix. The MEMS gas sensor possesses excellent sensitivity for low-concentration gas monitoring, and tolerance stability for high-concentration gas, as well as excellent anti-interference performance and response speed.

This invention discloses an ocular implant and its delivery system, comprising: a flexible substrate; multiple nanowire arrays disposed on the flexible substrate; an elastic ring disposed along the circumferential edge of the flexible substrate, the elastic ring having elastic memory and capable of returning to its original shape before deformation after deformation; and two opposing openings disposed near the edge of the flexible substrate. The nanowire array of the ocular implant of this invention can be composed of multiple materials spliced ​​together, and materials with different efficacies and photosensitive wavelengths can be selected for splicing. Therefore, personalized ocular implants can be customized according to different patient conditions to achieve a better match with the patient's fundus condition. Furthermore, the folding and opening design of the ocular implant of this invention, as well as the self-expanding property of the elastic ring, enable it to be adapted to a delivery system for positioning and minimally invasive implantation.

This invention discloses a frustum-shaped flexible photoelectric energy conversion module, comprising an optical fiber connector, a housing, and a photovoltaic cell. The optical fiber connector is fixedly disposed on the top of the housing. A frustum-shaped cavity is formed within the housing, and the photovoltaic cell is fixed within the cavity. The photovoltaic cell is a three-dimensional flexible energy transfer chip comprising multiple sub-cells connected in series. Each sub-cell comprises multiple arrayed nanowires with a radial PIN structure. A wire interface is provided on the housing. The input end of the photovoltaic cell is connected to an external input device via the optical fiber connector, and the output end of the photovoltaic cell passes through the wire interface and is connected to a power-consuming device. In this invention, the use of a nanowire array structure for the sub-cells increases the specific surface area, expands the longitudinal absorption area, saves projected area, reduces volume, and improves heat dissipation. Simultaneously, the nanoarray structure can significantly improve the light-harvesting capability and charge separation efficiency of the cell.

The invention discloses a wafer room temperature bonding method and application thereof, and belongs to the technical field of semiconductor advanced packaging and three-dimensional integration. The method comprises the following steps: providing a first wafer, and sequentially preparing a metal plane layer and an oxide layer on the surface of one side of the first wafer to form a metal / oxide composite layer; selectively etching the metal / oxide composite layer to remove the oxide layer and form a metal nanowire array layer on the metal plane layer; providing a second wafer, and preparing a metal material layer on the surface of one side of the second wafer; and aligning the surface, with the metal nanowire array layer, of the first wafer with the surface, with the metal material layer, of the second wafer, and then bonding. According to the invention, the metal nanowire array is introduced into the bonding interface, so that the nanowires are subjected to plastic deformation and local surface diffusion under the action of external pressure, that is, compact and reliable metal-metal bonding can be realized in a room temperature environment, and the requirements of a low-temperature process window and high strength are both considered.

This invention discloses a method for preparing Co-P3 / S-TiO2 nanowire array materials, along with their products and applications. Through a hydrothermal-etching-phosphating method, Co single atoms coordinated with P were successfully anchored on the surface of a TiO2 nanowire array rich in step defects, resulting in the Co-P3 / S-TiO2 nanowire array material. Under the dual regulation of the special step structure and the suitable electronegativity of P, the Co metal atom becomes an electron-rich center, exhibiting superior adsorption capacity and a unique coordination environment, thus possessing excellent electrocatalytic hydrogen evolution performance. The preparation process is simple, and the raw materials are inexpensive. This invention provides inspiration for the design and synthesis of single-atom catalysts and their application in the field of electrocatalytic water electrolysis.

The invention relates to the technical field of detectors, in particular to a graded silicon nanowire metasurface, a manufacturing method thereof and a silicon-based photoelectric detector, and the silicon-based photoelectric detector comprises the graded silicon nanowire metasurface. The graded silicon nanowire metasurface comprises a silicon substrate, one side of the silicon substrate comprises a side top surface and at least one stage of groove surface generated by etching along the side top surface, and the etching depths of any stage of groove surface are different; and the graded silicon nanowire is integrally formed on one side of the silicon substrate and comprises a silicon nanowire array which is formed at least depending on the groove surface. The narrow-band selective absorption / emission device has the advantages of realizing narrow-band selective absorption / emission, keeping high hotspot density, low cost, easiness in batch processing and the like, and has the potential effect of realizing high-dimensional detection requirements.

This invention discloses a ligand-free electrodeposition method for growing platinum nanowire arrays on a substrate, with lengths reaching up to approximately 10 μm. The method exhibits a wide deposition potential range of -0.5 V to -7 V. By adjusting the deposition time, the length of the platinum nanowires can be controlled on the substrate without a template or small molecule ligands. Furthermore, the density of the platinum nanowires can be controlled by varying the concentration of the silane coupling agent. Moreover, this synthesis can be extended to conductive substrates, allowing the platinum nanowire arrays to be directly used as working electrodes, providing significant application potential in fields such as electrocatalysis. This invention offers advantages such as simple process, mild reaction conditions, low cost, and the precise controllability, ease of operation, and environmental friendliness of electrodeposition for synthesizing nanomaterials.

The application belongs to the field of electrochemical detection, and particularly relates to a water-vapor self-powered sensor for lincomycin detection and a preparation method thereof. A glass substrate is used as a substrate, a copper foil tape is used as a positive electrode and a negative electrode, a ZnO nanowire array and Ce-MOF are used as power generation materials to prepare a water-vapor generator, and a lincomycin aptamer is assembled to construct a light-assisted water-vapor self-powered sensor. The power generation material is a composite material of the ZnO nanowire array and the Ce-MOF. The light assistance is combined into the water-vapor self-powered sensor, and the water-vapor self-powered sensor significantly improves the generated electric output under the light assistance. The application widens the application of the ZnO nanowire array and the Ce-MOF in water-vapor induced power generation, and provides a new strategy for electrochemical detection. The constructed light-assisted water-vapor self-powered sensor has a wide detection range, high sensitivity, low detection limit and low detection cost.

The invention discloses a preparation method of an addressable disc ultramicro electrode array for electrochemical imaging, which comprises the following steps of: 1, preparing a nanowire array by using an ultrathin slicing machine as processing equipment and a silicon wafer with a micron groove array structure as a template; 2, transferring the nanowire array to a silicon wafer, performing three-dimensional alignment on a molybdenum mask plate with a lead pattern and the nanowire array, and realizing lap joint of a lead and the nanowire array and preparation of the lead by combining a physical vapor deposition method; 3, resin is poured on the silicon wafer for normal-temperature curing, and the pattern is transferred to the resin; 4, macroscopic wire lap joint and packaging are carried out, a resin block with an embedded array structure is obtained, the end face is trimmed through an ultra-thin slicing machine, the dot array is exposed, and preparation of the addressable disc ultramicro electrode array is completed. According to the method, the addressable disc ultramicro electrode array which is high in consistency, high in spatial resolution and capable of being expanded at will can be prepared simply and efficiently at low cost.

The invention relates to the technical field of contact lenses, in particular to a self-driven sensing contact lens with an intraocular pressure monitoring function and a preparation method of the self-driven sensing contact lens. Comprising a lens, a sensing assembly, an electrode structure and a monitoring characterization module, the sensing assembly comprises a silicon substrate and a nanowire array arranged on the upper surface of the silicon substrate, the nanowire array comprises a plurality of nanowires arranged at intervals, each nanowire is perpendicular to the upper surface of the silicon substrate, and the electrode structure is arranged on the upper surface of the silicon substrate. The sensing assembly is used for generating a water volt electric signal related to deformation when the silicon substrate is deformed; the electrode structure comprises a first electrode plate arranged between the sensing assembly and the inner side of the lens and a second electrode plate adhered to the side, away from the lens, of the sensing assembly. The self-driven sensing contact lens has high sensitivity and good biocompatibility, can comprehensively and continuously capture tiny shape changes of eyeballs in different states, and provides richer and more accurate data support for intraocular pressure monitoring.

This invention discloses a method for preparing cobalt-manganese sulfide nanosheets@cobalt-copper sulfide nanowire arrays / nickel foam as a supercapacitor electrode material. The purpose of this invention is to design a core-shell structure composed of different components to improve the specific capacity and cycle performance of the electrode material. This invention mainly includes: 1. Hydrothermal preparation of cobalt-copper precursor / nickel foam (CoCu-pre / NF); 2. Hydrothermal sulfidation preparation of cobalt-copper sulfide nanosheet arrays / nickel foam (CuCo2S4 / NF); 3. Hydrothermal preparation of cobalt-manganese sulfide nanosheets@cobalt-copper sulfide nanowire arrays / nickel foam (MnCoS@CuCo2S4 / NF). This invention features a simple synthesis process, low cost, high yield, and no need for subsequent processing. The MnCoS@CuCo2S4 heterostructure exhibits stronger OH... ‑ The MnCoS@CuCo2S4 / NF electrode exhibits high capture capacity and excellent conductivity, thereby enhancing the efficiency of rapid redox processes. At 1 A g... ‑1 At that time, it obtained 1141.2 C g. ‑1 The specific capacitance at 10 A g ‑1 It exhibits excellent cycling performance of 90.7% over 10,000 cycles. (740.47 W kg) ‑1 At a power density of 64.38 Wh / kg, the hybrid supercapacitor (HSC) can provide 64.38 Wh / kg. ‑1 The electrode exhibits high energy density and can successfully light up LED bulbs. It has enormous application potential as a high-performance electrode material for supercapacitors.

The application discloses a spectrum shift type hydrogen sensor and a preparation method thereof, and comprises a silicon substrate, a suspended micro-bridge formed by local etching and releasing of the silicon substrate, and a nanowire array arranged on the suspended micro-bridge, wherein the nanowire sensitive structure in the nanowire array comprises, from inside to outside, a gold core, a palladium shell layer coated on the periphery of the gold core, an air gap located outside the palladium shell layer, an annular gold shell layer arranged around the air gap, and a porous alumina filling layer reserved in the final device and filled outside the annular gold shell layer; a temperature control circuit is connected with the suspended micro-bridge and used for controlling the working temperature of the suspended micro-bridge; wherein the nanowire sensitive structure is subjected to plasmonic resonance spectrum peak displacement under the action of hydrogen, and the air gap and the annular gold shell layer form a radial coupling cavity for amplifying the readout amplitude of the spectrum peak displacement. The application can realize high-sensitivity, fast-recovery and high-stability hydrogen spectrum detection.

The invention belongs to the technical field of ultraviolet photoelectric detection, and relates to a self-supporting SiC / GaN heterojunction nano array applied to underwater optical communication and a preparation method and application thereof. The GaN thin layer is successfully loaded on the surface layer of the self-supporting SiC nanowire array, and the original nanowire array structure is not influenced, so that the photo-anode has a relatively large specific surface area, the photo-anode is facilitated to absorb more photons and generate more electron-hole pairs, and the photoelectric conversion efficiency of the photo-anode is improved. And the highly-ordered nanowire array structure also provides a larger solid-liquid reaction interface, so that the electrode reaction is promoted.

The application discloses a method for synthesizing Au-Pt nanowire arrays by an electrochemical deposition method on carbon paper with aniline as a ligand and application thereof, and can be applied to methanol electro-oxidation reaction. After growing gold nanowire arrays on a conductive substrate by using an electrochemical deposition method with aniline as a ligand, Au-Pt nanowires are synthesized by a secondary electro-deposition mode. The electrochemical deposition has controllable reduction capacity, convenient operation and environmental friendliness. The combination of gold nanowires and platinum (Pt) can significantly improve the activity of a catalyst. The diameter of gold-platinum nanowires prepared by the electrochemical deposition method assisted by an aniline ligand can reach 30 nanometers. The increase in the size is helpful to expand the electrochemical active surface area, thereby enhancing the electron transmission efficiency and further improving the electro-catalytic performance. The gold nanowires are integrated into platinum-based nanomaterials, and for an anode catalyst of a direct methanol fuel cell, the gold nanowires can significantly improve the catalytic efficiency of a methanol oxidation reaction.

The invention provides an MEMS gas sensor and a preparation method thereof. The MEMS gas sensor comprises an insulating substrate, a heating electrode, an insulating layer and a test unit which are stacked, the test unit comprises a test electrode, a sensitive unit and a selective separation membrane; the sensitive unit is provided with a nanowire array structure formed by a plurality of nanowires arranged at intervals, and the selective separation film covers the surfaces of the sensitive unit and the concave part; wherein the nanowire comprises a first metal and a second metal, the first metal is Pd, and the second metal is selected from at least one of Ni, Cu, Ag, Au and Ir; the selective separation membrane comprises an inner-layer separation membrane and an outer-layer separation membrane which are sequentially stacked; the inner-layer separation membrane comprises polytetrafluoroethylene; the outer-layer separation membrane is a mixed matrix membrane which takes a covalent organic framework material as a filler and takes an intrinsic microporous polymer as a matrix. The MEMS gas sensor has excellent low-concentration gas monitoring sensitivity, high-concentration gas tolerance stability and excellent anti-interference performance and response speed.

This invention relates to the field of diamond heat sinks, specifically a diamond heat sink and its preparation method, comprising: in-situ growth of a silicon carbide nanowire array on a diamond surface; sputtering a titanium carbide layer on the diamond surface using magnetron sputtering to obtain a titanium carbide / silicon carbide nanowire array composite structure; placing solder paste between the diamond and a metal sheet to form a brazed component, wherein the titanium carbide / silicon carbide nanowire array composite structure in the brazed component faces the side of the solder paste; and finally vacuum brazing. This invention has good process compatibility, is easy to realize industrial application, and effectively solves the problems of weak interface bonding, high thermal stress, and high interface thermal resistance when connecting diamond films and metals. It has important application value for heat dissipation of high-power electronic devices.

The application discloses a kind of photoelectric immunosensor and preparation method based on silicon nanowire array @ polydopamine composite structure, comprising: the composite structure is polydopamine and is coated on the surface of silicon nanowire array.This application also discloses the application of the above-mentioned sensor in photoelectric immunodetection myocardial infarction biomarker-troponin.Silicon nanowire array has excellent photoelectric conversion performance;Polydopamine has good biocompatibility, and the surface has abundant amine functional groups, and is easy to modify.The composite structure obtained by combining the two materials.According to the application, the complexity of the photoelectric immunosensor structure is effectively reduced, and the stability and sensitivity of the immunosensor are improved, which is used for detecting cardiac troponin I, has high sensitivity and good specificity.

The application relates to a nanowire array, a growth method and a thermoelectric device, and the growth method comprises the following steps: obtaining a SnTe template and SnTe powder, taking the SnTe template as a growth substrate, and coating gold particles on the SnTe template; placing the SnTe powder in a high-temperature zone and the SnTe template in a low-temperature zone, heating the SnTe powder in the high-temperature zone to sublimate into a gaseous state, and when the gaseous SnTe flows to the SnTe template in the low-temperature zone, the gaseous SnTe is cooled and grows into SnTe nanowires under the induction of the gold particles, and the SnTe nanowires are nanowires grown along the 100 direction. The growth method utilizes a selective growth mechanism with the lowest energy to obtain a directional and ordered SnTe nanowire array, and the obtained nanowire thermal conductivity can be as low as 5.6 Wm ‑1 K ‑1 .

The application discloses a cylindrical flexible photoelectric energy conversion module, which comprises a fiber joint, a shell and a photoelectric cell, the fiber joint is fixedly arranged on the top of the shell, a cylindrical cavity is arranged in the shell, and the photoelectric cell is fixed in the cavity through a base, the photoelectric cell is a flexible energy transmission chip, which comprises a plurality of series-connected sub-cells, the sub-cell comprises a plurality of array-arranged nanowires, and the nanowires are radial PIN structures. In the application, the sub-cell adopts the nanowire array structure, the specific surface area is increased, the longitudinal absorption area is expanded, the projection area is saved, the volume is reduced, the heat dissipation is improved, the nanowire array structure can significantly improve the light capturing capacity of the cell and the charge separation efficiency, and the heat dissipation effect is improved through filling of a heat-conducting medium between the base and the cavity.

The invention discloses a flexible sensor based on a nanowire array and a one-step electrochemical synthesis process thereof, and relates to the technical field of nano materials and sensors, and the one-step electrochemical synthesis process comprises the following steps: preparing an electrolyte containing silver nitrate, copper sulfate and a supporting electrolyte, the silver nitrate and the copper sulfate having a specific molar ratio; selecting a proper flexible substrate; a three-electrode system is adopted, and silver ions and copper ions in the solution are subjected to electrochemical reduction reaction on the surface of the flexible substrate to sequentially achieve silver core formation and copper atom deposition, so that a silver-copper core-shell nanowire array structure is constructed; metal electrodes are deposited at the two ends of the nanowire array through magnetron sputtering or electron beam evaporation and the like, and a flexible packaging material is adopted to package the sensor so as to ensure the stability and reliability of the sensor. Through the electrochemical synthesis process, the problems that a traditional multi-step preparation method is high in production cost, low in nanowire size and distribution control precision and poor in product consistency are solved, high-quality preparation of nanowires and integrated construction of the sensor are achieved, the production cost is reduced, and the production efficiency is improved. And the application of the system in the fields of wearable equipment, biomedical monitoring, intelligent robots and the like is expanded.

The application provides a directional rubbing device, a method for constructing a nanochannel, a method for directional growth of a nanowire array, and the nanowire array and application. The directional rubbing device can quickly form a nanoscale channel array with a certain orientation on an amorphous substrate, the area of the constructed channel array is controllable, and the width, density and depth of the channel can be controlled by adjusting the mesh number of the sandpaper and the number of the pressing blocks of the rubbing device; then the amorphous substrate is subjected to hydrophobic modification, and a MPc nanowire array with good distribution uniformity, good orientation and good stability can be grown on the substrate with the directional rubbing nanochannel array by using a PVD method; and the obtained nanowire array can be applied to an organic field effect transistor and a photodetector product.

The invention discloses a flexible hydrogen leakage sensing patch and a preparation method thereof, and a hydrogen leakage monitoring system. The patch comprises a flexible substrate; the functional layer comprises a conductive metal film layer arranged on the top surface of the flexible substrate and a nanowire array arranged on the top surface of the conductive metal film layer; the functional layer is stripped from the rigid substrate and transferred to the flexible substrate; the electrode layer is arranged on the top surface of the nanowire array and is used for forming an electric signal leading-out end; and the packaging layer covers the electrode layer and the nanowire array, and a hydrogen permeation window for introducing hydrogen into the nanowire array is formed in the packaging layer. The hydrogen leakage sensing patch based on the flexible substrate can be directly attached to a complex curved surface and has the excellent conformal attaching characteristic, the functional layer is stripped from the rigid substrate and transferred to the flexible substrate, the problems that the flexible substrate cannot adapt to high temperature and the surface roughness of the flexible substrate are solved through the transfer technology, and the hydrogen leakage sensing patch is high in sensitivity and high in reliability. And high quality and consistency of the nanowire array are ensured.

The invention discloses a substrate pretreatment process applied to an integrated electrode material, and belongs to the technical field of electrode material preparation. The process sequentially comprises the steps of substrate pretreatment, micro-etching, rough nickel deposition and embroidered ball array skeleton electrodeposition, and a micron-sized rough structure is constructed on the surface of a nickel-based porous substrate through micro-etching so as to provide more nucleation sites; on the basis that rough nickel is deposited on the rough surface of a base body, a compact amorphous metal nickel transition layer is formed, strong mechanical interlocking with the base body is achieved, and high corrosion resistance and high conductivity are achieved; and finally, growing a vertically-oriented nanowire array framework on the metal nickel transition layer by utilizing electro-deposition. Through the synergistic effect of micro-etching, rough nickel deposition and electro-deposition, a complete, stable and efficient three-dimensional conductive carrier from a macroscopic matrix to a microcosmic active skeleton is finally constructed, and the binding force between the integrated electrode material and the matrix, the interface stability and the mass transfer capacity are fundamentally improved.

This invention discloses a hydrogen sensing probe and its fabrication method. The nanowire array of this invention provides a high specific surface area and a three-dimensional channel structure, improving the contact efficiency between the sensitive layer and hydrogen, providing a pathway for light / gas transmission, and balancing sensitivity and response / recovery kinetics. At the same time, it abandons the traditional external cavity mirror structure. The Fabry-Perot interferometer cavity formed by the second and first reflective layers enhances the round-trip interaction between light and the sensitive layer, improves the spectral drift amplitude and signal-to-noise ratio, and reduces the influence of environmental factors. Furthermore, the nanowire array is coupled with the emitted light field and / or reflected light field at the end face to form a local field enhancement effect, which is superimposed with the Fabry-Perot interferometer effect, resulting in a larger spectral shift caused by the same amount of hydrogen.

An apparatus includes a multi-spectral sensor and an image sensor. The multi-spectral sensor includes a spectrometer having at least a first optical filter and a second optical filter. The first optical filter includes a first lattice of nanowires having a first geometric property and configured to detect light within a first spectral band. The second optical filter includes a second lattice of nanowires having a second geometric property and configured to detect light within a second spectral band. The first spectral band and the second spectral band can at least partially define a spectral resolution of the spectrometer. The image sensor includes a first pixel configured to generate a first signal in response to receiving the light within the first spectral band, and a second pixel configured to generate a second signal in response to receiving the light within the second spectral band.

The invention discloses a ZnO nanowire array / MXene composite material, a preparation method of the ZnO nanowire array / MXene composite material and application of the ZnO nanowire array / MXene composite material in a flexible ultraviolet sensor, and belongs to the technical field of inorganic composite materials and preparation of the inorganic composite materials. The problems that an existing ZnO-based flexible ultraviolet sensor is poor in performance, low in reliability and the like are solved. The ZnO seed crystal layer is plated on the surface of the MXene sheet layer based on the liquid phase reaction, the ZnO nanowire array is continuously constructed on the MXene sheet layer in situ through the chemical synthesis method, the ZnO nanowire array / MXene heterojunction is formed, the problems that an existing ZnO nanowire is low in flexibility and reliability, the sensing performance is limited by the physical property of a material and the like are solved, the light current and external quantum efficiency of a device are improved, and the device is suitable for large-scale popularization and application. And meanwhile, flexible application in the fields of image sensing and the like can be realized.

The application discloses a flexible hydrogen leakage sensing patch, a preparation method thereof and a hydrogen leakage monitoring system. The patch comprises a flexible substrate, a functional layer, an electrode layer and a packaging layer. The functional layer comprises a conductive metal film layer arranged on the top surface of the flexible substrate and a nanowire array arranged on the top surface of the conductive metal film layer. The functional layer is peeled off from a rigid substrate and transferred to the flexible substrate. The electrode layer is arranged on the top surface of the nanowire array and used for forming an electrical signal lead-out end. The packaging layer covers the electrode layer and the nanowire array, and a hydrogen permeation window for passing hydrogen into the nanowire array is arranged on the packaging layer. The hydrogen leakage sensing patch is based on the flexible substrate, can be directly attached to a complex curved surface, has excellent conformal fitting characteristics, and the functional layer of the application is peeled off from the rigid substrate and transferred to the flexible substrate. The transfer process avoids the problems caused by the fact that the flexible substrate cannot adapt to high temperature and the surface roughness of the flexible substrate, and guarantees the high quality and consistency of the nanowire array.

The invention discloses an electrical modulation two-color detector based on a semiconductor nanowire array, a manufacturing method and application, a layer of heavily doped n-type GaAs buffer layer is epitaxially grown on a GaAs substrate, a layer of gold film is deposited on the surface of the buffer layer and annealing treatment is carried out, and then a vertical GaAs nanowire array is grown on a sample. And filling the periphery of the vertically arranged nanowire array with a BCB polymer for curing and supporting, and depositing a Ga-doped ZnO film on the upper surfaces of the nanowire array and the BCB polymer. According to the distinguishing method of the electric modulation double-color detector, under positive and negative bias voltages, the working mode of the detector is converted between a visible detection mode and an infrared detection mode. The method comprises the following steps: respectively measuring a first responsivity R1 of a detector under a first polarity bias voltage and a second responsivity R2 of the detector under a second polarity bias voltage; calculating a responsivity ratio R1 / R2; and comparing the responsivity ratio with a pre-stored calibration database so as to determine the wavelength of the incident monochromatic light.