62 results about "Nanoneedle" patented technology

The invention provides a tip Raman-based metal oxide nanoparticle in-situ detection method, which comprises: S1, dispersing metal oxide nanoparticles in a nanoparticle dispersion liquid, focusing laser to the tip of a nanometer tip through an objective lens, capturing a single nanoparticle by using an optical tweezers technology, and attaching the single nanoparticle to the nanometer tip; s2, focusing Raman laser on a nano needle tip-particle interface, generating a local high-temperature field through a photo-thermal near-field coupling effect, triggering a thermal chemical reaction of nano particles, and synchronously collecting a Raman spectrum; and S3, carrying out pretreatment and characteristic peak analysis on the collected Raman signal of the Raman spectrum, and determining the reaction critical temperature and the dynamic process in combination with temperature calibration data. According to the invention, capture and accurate heating of the nanoparticles are realized through photo-thermal coupling of the optical tweezers and the needle tip, and thermal chemical reaction monitoring of the nanoparticles is realized.

The invention discloses a working temperature control method of a Josephson probe and a method for regulating and controlling the thickness of an Nb film, the working temperature of the Nb-based probe is increased to 7.2 K by regulating and controlling the film thickness parameter and controlling the working temperature of the probe, and the highest record of similar probes is created. According to the method for regulating and controlling the thickness of the Nb film, a four-groove quartz tube is selected as a substrate, and after ultrasonic cleaning, a nano needle tip is drawn by adopting a laser heating method, so that a needle tip structure with a clean surface and a controllable geometric structure is obtained; and horizontally fixing the prepared nano needle tip on a probe bracket, depositing a niobium film by adopting a magnetron sputtering process, and controlling the thickness of the Nb film to prepare the Josephson probe. According to the invention, the dependence of the probe on an extremely low temperature environment is obviously reduced, the limitation of the original process is broken, the available film thickness range is effectively widened, the preparation yield and the performance consistency of the probe are obviously improved, and a reliable device basis is provided for the practical development of near-field microwave imaging and quantum sensing technologies.

The invention discloses a corrosion-resistant photovoltaic module material and a preparation method thereof, and belongs to the technical field of photovoltaic modules, zinc oxide nanoneedles grow on the surface of modified mica powder in an oriented manner to obtain zinc oxide / mica powder, and the zinc oxide / mica powder is treated by 3-aminopropyltriethoxysilane to be grafted with 2-hydroxyaniline to obtain the corrosion-resistant photovoltaic module material. Zinc oxide can cooperate with aniline to be adsorbed on the metal surface to form a compact hydrophobic protection layer, and contact between a corrosion medium and metal is blocked through a physical shielding effect, so that an electrochemical corrosion reaction is inhibited; the growth of the zinc oxide nanoneedles can improve the specific surface area and the surface roughness of the modified mica, meanwhile, the zinc oxide nanoneedles are endowed with photocatalytic activity, active oxygen is generated under illumination, organic pollutants are decomposed, microorganism breeding is inhibited, and therefore biological corrosion is relieved; the aging of the anti-corrosion emulsion coating is reduced, and the adhesion of the coating to a photovoltaic cell can be increased through a mechanical interlocking effect by virtue of the nano needle-shaped structure.

The invention belongs to the technical field of biomedicine and nano material electronics, and particularly relates to a low-voltage efficient sterilization electrode device based on local enhanced electric field treatment. According to the electrode device, vertically-oriented nanoneedles serve as a core functional layer, a nanoneedle array is arranged on a conductive substrate, the intensity of an electric field in a pinpoint area is amplified by multiple times through the lightning rod effect induced by the tips of the nanoneedles so as to achieve irreversible electroporation of a low-potential induced pathogen membrane, the length of the nanoneedles is 5-100 micrometers, and the length of the nanoneedles is 5-100 micrometers. The curvature radius of the needle tip is lt; and the sterilization device can realize nearly complete sterilization on escherichia coli and methicillin-resistant staphylococcus aureus within 5 minutes. The invention further provides a nanometer microneedle sterilization patch based on the local enhanced electric field, a self-power-supply or external-source-power-supply energy supply mode is adopted, and rapid sterilization of a wound can be achieved without medicine adding.

The invention provides a chlorine corrosion resistant cathode for electrolyzing seawater as well as a preparation method and application of the chlorine corrosion resistant cathode. The preparation method comprises the following steps: S1, dissolving a cobalt salt, a nickel salt, a morphology regulating agent and a structure-directing agent in a solvent according to a molar ratio of (1-2.5): (1-2.5): (8-12): (6-10), and stirring to form a first solution; s2, a titanium mesh and the first solution are subjected to a hydrothermal reaction at the temperature of 100-150 DEG C, and CoNi layered double hydroxide with the shape of a nanoneedle array grows on the titanium mesh in situ; s3, selenium powder and a reducing agent are dissolved in a solvent according to the molar ratio of 1: (0.8-1.5) and stirred to form a second solution; and S4, carrying out hydrothermal reaction on the titanium mesh on which the CoNi layered double hydroxides grow in situ and a second solution at 150-190 DEG C so as to grow cobalt-nickel bimetallic selenide of which the morphology is a nanoneedle array in situ on the titanium mesh, thereby obtaining the chlorine corrosion resistant cathode.

The invention discloses a cobalt hydroxide electrode, the cobalt hydroxide electrode is cobalt hydroxide loaded by foamed nickel, the cobalt hydroxide is amorphous phase cobalt hydroxide, and the microstructure of the cobalt hydroxide is a nanoneedle. The electrode obtained by the invention has the characteristics of relatively high catalytic activity and relatively strong reaction kinetics. The invention further discloses a preparation method and application of the cobalt hydroxide electrode.

This invention provides a CNT / W 18 O 49 Cu nanofiber sea urchin material and its SERS-photocatalytic bifunctional application, wherein the material is internally embedded with carboxylated CNTs, and W 18 O 49 The nanostructures intertwine to form a three-dimensional network, and the surface of the nano-sea urchin material is composed of high-density radial nanoneedles with Cu at the tips. 2+ Anchored in an atomically dispersed form. This is achieved through carboxylation of CNTs with W... 18 O 49 Nanoneedles intertwine to form a three-dimensional network, creating a radial nanoneedle structure on the surface, with atomically dispersed Cu atoms anchored at the needle tips. 2+ It combines high-sensitivity SERS detection with efficient photocatalytic degradation, enabling integrated "detection-degradation" treatment of organic pollutants.

The invention belongs to the field of micro-nano structures, and relates to a double-layer gold nanopore structure supported by a nano needle tip as well as a preparation method and application of the double-layer gold nanopore structure. According to the preparation method, the double-layer gold nanopore structure supported by the nano needle tip is obtained through an electron beam thermal evaporation system, a polystyrene microsphere self-assembly technology and reactive ion etching (RIE), the preparation process is simple, the cost is low, the repeatability is good, the structural stability is good, and the tolerance is high. Compared with a single-layer gold nanopore structure, the single-layer gold nanopore structure not only has more modes, but also presents complex multi-mode response dependent on pumping wavelength.

This invention discloses a method for preparing a superhydrophobic flexible SERS substrate based on a glove template and Cu(OH)₂ nanoneedles, belonging to the field of Raman spectroscopy technology. It solves the technical problems of existing commercial templates being expensive, having limited area, and mostly being hydrophilic materials, thus failing to enrich target molecules and limiting substrate detection sensitivity. The method involves: pouring a PDMS mixture onto the surface of a KD-N-TPE glove template, allowing it to solidify, and then peeling it off to obtain a PDMS substrate with a micron-scale protrusion array structure; depositing Cu by vapor deposition; reacting a mixed solution of NaOH and K₂S₂O₈ with Cu to generate Cu(OH)₂ nanoneedle structures; and then depositing Ag by vapor deposition to obtain the superhydrophobic flexible SERS substrate. The advantages of this invention are: the prepared SERS substrate has high sensitivity and good uniformity, enabling low-concentration detection of target molecules, and is low-cost, low-consumption, and simple to operate.

The invention belongs to the field of membrane materials, and particularly relates to a hydrophobic breathable membrane and a preparation method thereof. The hydrophobic gas-permeable membrane provided by the invention is prepared by sequentially performing plasma bombardment activation, chemical vapor deposition of a SiO2 nano layer, hydrothermal synthesis of a CuSiO3 nano needle-shaped structure and modification of a hydrophobic silane coupling agent on the surface of a PTFE porous membrane. The method comprises the following steps: firstly, activating the surface of the PTFE membrane by utilizing a plasma bombardment technology to enable the PTFE membrane to have modifiability; then covering the surface of the activated film structure with a nano-scale SiO2 thin layer by means of a chemical vapor deposition (CVD) technology, so that the CuSiO3 nano needle-shaped structure can be constructed at one time through a hydrothermal synthesis method; finally, a hydrophobic silane coupling agent is modified, so that the membrane material has strong hydrophobicity. Experimental results show that the water contact angle of the hydrophobic breathable membrane is larger than 140 degrees, and the breathability is reduced by less than 5% compared with that of a PTFE porous membrane before treatment.

The invention belongs to the technical field of battery positive electrodes, and particularly relates to a solid solution positive electrode catalytic material for a lithium oxygen battery and a preparation method and application thereof. Comprising the following steps: firstly, growing a nickel-cobalt bimetallic precursor nanoneedle array on carbon paper by using a 1-octyl-3-methylimidazole chloride salt assisted hydrothermal method; then preparing a selenylation sample through a NaHSe solution; and step 3, cleaning the selenylation sample for multiple times, roasting in an argon atmosphere to remove excessive selenium, and synthesizing the Ni-doped CoSe2 solid solution nanoneedle array. The reaction conditions are mild and easy to control; the selenized material completely inherits the morphology of the precursor; and in the application of the lithium oxygen battery, the lithium oxygen battery still has excellent stability after multiple cycles, and enough discharge depth can be realized.

The embodiment of the invention discloses a visual nanoneedle transfection micro-fluidic chip, a preparation method and a cell transfection method.The micro-fluidic chip comprises a patterned glass nanoneedle substrate and a transparent PDMS micro-channel layer, the transparent PDMS micro-channel layer is bonded to the patterned glass nanoneedle substrate, and the transparent PDMS micro-channel layer is bonded to the patterned glass nanoneedle substrate. The patterned glass nanoneedle substrate and the transparent PDMS micro-channel layer jointly form a light-transmitting structure and are compatible with a fluorescent inverted microscope; wherein the surface of the patterned glass nanoneedle substrate is provided with a nanoneedle array of which the pinpoint height range is 700-1000nm and the pinpoint diameter range is 50-200nm; the transparent PDMS micro-channel is a micro-channel prepared from a high-transparency PDMS material, and the micro-channel comprises a channel main body, a channel inlet formed in one end of the channel main body and a channel outlet formed in the other end of the channel main body; wherein the height range of a flow channel in the flow channel main body is 10-25 microns, the width range of the flow channel is 10-100 microns, and a flow channel inlet is used for being connected with an external micro-flow pump.

This invention discloses a sea urchin-shaped oxygen-rich vacancy O vac This paper describes a CuO@ZIF-8 core-shell structured photothermal catalyst, its preparation method, and its application, belonging to the fields of photocatalytic materials and artificial nitrogen fixation technology. The technical solution is as follows: the catalyst has a core-shell structure, with the core being urchin-shaped copper oxide (CuO) microspheres. These microspheres are assembled from radially arranged one-dimensional nanoneedles or nanospikes, and the surface of the core contains oxygen vacancies (O). vac The shell is an in-situ grown ultrathin zeolite imidazole ester framework material, ZIF-8, which possesses hydrophobic and molecular diffusion channel properties. This invention also constructs a matching biomimetic three-phase interface photothermal reaction system. Through the synergy of a hydrophilic substrate supplying water and a hydrophobic, permeable shell, it achieves a balance between gas diffusion and proton supply, reducing the submersion of active sites by liquid water and the occurrence of side reactions. This invention has significant advantages such as high photothermal conversion efficiency, mild preparation conditions, and high gas-liquid interface mass transfer efficiency.

The invention discloses a processing method of a nano microneedle, which relates to the technical field of nano microneedles and comprises the following steps: cleaning the surface of a monocrystalline silicon or gold wafer, coating photoresist on the surface of the monocrystalline silicon or gold wafer, drying, transferring a microneedle array pattern to a photoresist layer through a photoetching process, putting the wafer into a vacuum reaction cavity, introducing reaction gas, and carrying out vacuum reaction on the wafer and the photoresist layer to obtain the nano microneedle. The processing method comprises the following steps: applying radio frequency power to generate plasma, carrying out anisotropic etching on a wafer, forming a microneedle cylinder, removing residual photoresist and cleaning to obtain a microneedle array, applying UV glue to a preset position of a plastic part, mounting the microneedle array to the glue dispensing position of the plastic part, and then carrying out UV irradiation on a mounted product to cure the UV glue. The size, the shape and the position of the microneedle and the nanostructure can be controlled by accurately designing a mask and etching parameters, the size range is from dozens of micrometers to hundreds of micrometers, the shape is from a cylinder to a cone, and the design freedom degree is large.

The invention discloses a preparation method and application of a superfine hollow CoSenanoneedle material. The method comprises the following steps: (1) mixing and dissolving cobalt nitrate, urea and ammonium fluoride, adding foamed nickel, preserving heat at 110-130 DEG C for 7-9 hours, cooling to room temperature, taking out the reacted foamed nickel, cleaning and drying to obtain a precursor; (2) mixing and dissolving selenium powder and sodium hydroxide, preserving heat at 190-210 DEG C for 7-9 hours, and cooling to room temperature to obtain an intermediate solution; and (3) putting the precursor into the intermediate solution, preserving heat at 140-160 DEG C for 7-9 hours, cooling to room temperature, taking out the reacted foamed nickel, cleaning and drying to obtain the superfine hollow CoSenanoneedle material. The nanoneedles directionally grow from the foamed nickel substrate to form a flower-cluster-shaped multilevel structure, so that the conductivity and the structural stability of a foamed nickel three-dimensional porous framework are reserved, and more catalytic active sites are exposed through the high specific surface area of the hollow nanoneedles.

The invention relates to a high-thermal-conductivity colored polyimide composite film and a preparation method thereof. The composite film is obtained by casting a colored polyimide solution on a conductive substrate containing a nano needle-shaped ZnO crystal array and then performing high-temperature vacuum solvent removal. The composite film provided by the invention not only has wide-range color adjustability, ultraviolet resistance and color uniformity, but also has excellent heat-conducting property, and has application potential in the fields of flexible display, 5G antennas, color bearing films, high-heat-conductivity insulating films, microelectronics and the like.

The invention relates to the technical field of nano material processing, and discloses an in-situ cleaning method for a transmission electron microscope sample material surface pollution layer. According to the in-situ cleaning method provided by the invention, in a high-vacuum environment of a transmission electron microscope, a controllable and localized physical and mechanical action is applied to a preselected microscopic area on the surface of a sample by using a precisely controllable nano needle tip, so that surface pollutants are directly removed in manners of scraping, stripping and the like; the nondestructive detection capability of the transmission electron microscope is used as real-time feedback, and finally, on the premise that the intrinsic structure of the sample is not damaged, the atomic-scale clean surface of the sample is exposed, and real-time in-situ analysis is carried out; compared with a traditional external preparation or in-situ cleaning technology, the method has the advantages that a pollution layer is removed by adopting a controllable mechanical contact effect, so that additional damages such as ion implantation, thermotropic degeneration and chemical pollution are fundamentally avoided, and an intrinsic structure of a material is really revealed on an atomic scale; and in addition, in-situ physical property measurement can be immediately carried out on the clean surface after cleaning.

The invention discloses a catalyst with a ZnO nanoneedle array, a preparation method and application, and relates to the technical field of nano catalysts, and the preparation method of the catalyst comprises the following steps: uniformly coating the surface of a zinc-based material subjected to acid treatment with a hydrogen peroxide solution, and carrying out normal-temperature spontaneous corrosion in air to obtain the ZnO nanoneedle array. According to the method, a corrosion strategy with mild reaction conditions is utilized, the method is a simpler and more convenient preparation process, and the prepared catalyst has a unique nanoneedle array morphology and can provide more active sites, so that the performance of photocatalytic oxidation of methane to prepare methanol and formaldehyde is improved.

This invention relates to a non-precious metal-based self-supporting electrode, its preparation method, and its application in high-efficiency water electrolysis. The self-supporting electrode comprises a non-precious metal substrate layer, and a transition layer and a catalytic active layer sequentially disposed on the surface of the non-precious metal substrate layer. The transition layer comprises NiFe nanoparticles; the catalytic active layer comprises CoFeLDH, which is arranged in a cactus-like structure as a nanoneedle array. A heterojunction interface exists between the transition layer containing NiFe nanoparticles and the catalytic active layer containing CoFeLDH. This invention exhibits a low oxygen evolution overpotential, high charge density, and excellent stability under operating conditions. Constructing a transition layer between the catalytic active layer and the nickel foam substrate optimizes the interfacial contact between the catalytic active layer and the substrate, contributing to a more uniform stress distribution and better interfacial adhesion, enhancing charge transfer and mass transfer, thereby achieving electrode interfacial stability.

The invention relates to a Josephson probe, a preparation method and a superconductive Josephson probe microscope. The preparation method comprises the following steps: providing a quartz nano needle tip of which the outer circumference is sequentially provided with a first groove, a second groove, a third groove and a fourth groove at equal intervals; the first groove of the quartz nanometer needle tip is right opposite to the superconducting sputtering target material, the included angle between the axis of the quartz nanometer needle tip and the horizontal direction is theta, and a first superconducting thin film is deposited through magnetron sputtering; and the quartz nanometer needle tip is turned over symmetrically, so that the third groove is right opposite to the superconducting sputtering target material, a second superconducting thin film is deposited through magnetron sputtering, and the first superconducting thin film and the second superconducting thin film form a Josephson junction at the tip of the quartz nanometer needle tip. The high-quality ultra-wideband Josephson probe is prepared through the two-step self-calibration thin film deposition process, effective regulation and control of the detection frequency from the microwave frequency band to the millimeter wave frequency band is achieved, and the application potential of a Josephson probe microscope in the aspect of high-frequency integrated circuit characterization is greatly expanded.

The invention discloses a method for detecting LncRNA-RBP spatial heterogeneity in living cells in real time and application of the method. The functionalized nanoneedle comprises a nanoneedle array chip and a hairpin DNA (Deoxyribose Nucleic Acid) probe. The nanoneedle disclosed by the invention can be used for detecting spatial heterogeneity of long-chain non-coding RNA and RBP in living cells in real time so as to carry out comprehensive quantitative analysis on an lncRNA-RBP compound, and can be used for tracking multiple spectrums of lncRNA and RBP in the living cells and capturing dynamic interaction heterogeneity of lncRNA and RBP in different biological processes.

The application discloses a nano-needle self-assembled flower-shaped microsphere metastable indium oxide gas-sensitive material, a gas-sensitive element and a preparation method and application. The nano-needle self-assembled flower-shaped microsphere metastable indium oxide gas-sensitive material has a three-dimensional flower-shaped microsphere formed by nano-needle self-assembly, the diameter of the nano-needle is about 8 nm, the diameter of the flower-shaped microsphere is about 2-3 microns, the main exposed crystal face of the material is (104), and the crystal structure is a metastable rhombohedral corundum phase. The prepared nano-needle self-assembled flower-shaped microsphere metastable indium oxide successfully realizes preparation of pure metastable indium oxide material under mild conditions and realizes application in the field of gas-sensitive detection, especially in the detection of H2S, and has the advantages of low working temperature, high sensitivity, high selectivity and low detection limit. Meanwhile, the synthesis preparation method is simple in synthesis, low in cost and has good industrial production prospects.

The invention discloses a Ni2P-coated CoCH / CFP heterojunction nano material for electro-catalytic hydrogen production in a full-pH environment and a preparation method of the Ni2P-coated CoCH / CFP heterojunction nano material. The material takes cobalt nitrate hexahydrate, nickel nitrate hexahydrate, urea, ammonium fluoride and carbon fiber paper (CFP) as raw materials, and is prepared by the following steps: 1) preparing a Co (CO3) 0.5 (OH) 0.11 H2O / CFP (CoCH / C FP for short) precursor by a hydrothermal method: vertically growing a Co (CO3) 0.5 (OH) 0.11 H2O nanoneedle array (CoCH for short) on the carbon fiber paper (CFP) by primary hydrothermal method to obtain the CoCH / CFP precursor; (2) preparing a Ni-LDHs (at) CoCH / CFP precursor by a hydrothermal method: growing a Ni-LDHs nanosheet on the CoCH nanoneedle by a secondary hydrothermal method to obtain the Ni-LDHs (at) CoCH / CFP precursor; and (3) preparing the Ni2P-coated CoCH / CFP heterojunction nano material by a heat treatment method: carrying out low-temperature phosphorization on the Ni-LDHs-coated CoCH / CFP precursor under the protection of argon, so as to obtain the Ni2P-coated CoCH / CFP heterojunction nano material. The nano material prepared by the invention can be used for producing hydrogen by electrolyzing water in a full-pH environment, and can stably produce hydrogen for 100 hours under the industrial ampere-level current density.

This invention discloses an antistatic substrate-free wafer bonding film and its preparation method, belonging to the field of thin film technology. The film contains antistatic nanoneedle composite microspheres and Schiff base corrosion inhibitor complexes. The two work synergistically to endow the wafer bonding film with excellent mechanical strength, antistatic properties, and corrosion resistance, and also have thermal conductivity, which can be applied to wafers and extend the service life of the wafer bonding film. The antistatic nanoneedle composite microspheres and Schiff base corrosion inhibitor complexes form a functionally complementary and structurally synergistic filler system in the matrix. The one-dimensional structure of the nanoneedles can act as a reinforcing phase, inhibiting the initiation of internal cracks in the film layer and improving the tensile strength of the film layer. The Schiff base structure can coordinate with the copper and zinc in the antistatic nanoneedle composite microspheres, firmly anchoring the Schiff base corrosion inhibitor complexes to the surface of the nanoneedle microspheres, allowing the corrosion inhibition sites to be evenly distributed in the film layer with the nanoneedle microspheres, improving the long-term effectiveness and uniformity of corrosion inhibition performance.

This invention discloses a method for preparing and applying a multi-dimensional composite material of bismuth sulfide nanoneedles grown on multi-walled carbon nanotubes / bismuth sulfide from sea urchins, belonging to the field of semiconductor functional materials technology. The purpose of this invention is to solve the problems of existing bismuth sulfide materials used as gas-sensitive materials, such as high operating temperatures, low sensitivity, high resistivity, and low conductivity. The method includes: 1. Preparation of a hydrothermal reaction solution; 2. Hydrothermal reaction; 3. Product collection and processing. The multi-walled carbon nanotube-grown bismuth sulfide nanoneedles / bismuth sulfide from sea urchins multi-dimensional composite material is used as a room-temperature sensitive material for H2S. This invention obtains an H2S sensor by printing the multi-walled carbon nanotube-grown bismuth sulfide nanoneedles / bismuth sulfide from sea urchins multi-dimensional composite material onto a ring electrode. It exhibits excellent sensitivity to H2S at room temperature, with a measurement range of 10 ppb to 5 ppm, enabling trace H2S detection. It can be widely applied in trace H2S detection in fields such as H2S storage, food safety, and chemical engineering.

The application discloses a ruthenium-doped nanoneedle flake carbon-supported cobalt trioxide tetroxide self-supporting electrode and a preparation method and application thereof. A mixed solution of cobalt nitrate hexahydrate, ammonium fluoride, ruthenium trichloride and urea is prepared into a ruthenium-cobalt precursor through a hydrothermal method, and the precursor is calcined in air after drying, so as to obtain an RCO catalyst grown on a carbon cloth. The catalyst has a nanoneedle flake structure, can provide a high-quality reactant transmission channel, and exhibits excellent oxygen evolution reaction electrocatalytic activity and stability in alkaline / acid electrolyte. The catalyst can be used as a high-efficiency anode catalyst for an acid / alkaline solution water electrolysis device and has a good market prospect.

This invention discloses a nitrogen-doped carbon-coated ternary nanoneedle array material, its preparation method, and its application in the electrolysis of hydrazine hydrate, belonging to the field of energy catalysis technology. The material comprises a substrate, a ternary nanoneedle array grown on the substrate surface, and a nitrogen-doped carbon material supported on the ternary nanoneedle array and the substrate surface; the ternary nanoneedles are composed of any three of iron, cobalt, copper, nickel, and manganese. This invention proposes an NC-supported ternary nanoneedle array, where NC and the ternary nanoneedle array synergistically achieve enrichment of active sites and enhancement of intrinsic activity, effectively improving the conductivity of the ternary nanoneedle array. For hydrogen evolution reaction and oxygen evolution reaction, electrons can be rapidly transferred between the catalyst surface and reaction intermediates, thereby accelerating the reaction rate. Simultaneously, this coating structure, by adjusting the adsorption energy, makes it easier for water molecules to be adsorbed and activated on the catalyst surface, thus promoting HzOR catalytic activity.

The invention provides a polypeptide ligand functionalized chiral zinc oxide nanoneedle, a preparation method thereof and application of the polypeptide ligand functionalized chiral zinc oxide nanoneedle in virus targeting and photocatalytic virus killing. The surface of the chiral zinc oxide nanoneedle is loaded with a polypeptide targeting ligand, and the polypeptide targeting ligand and the chiral zinc oxide nanoneedle are connected through a Zn-S covalent bond and an electrostatic adsorption effect. The invention provides a chiral zinc oxide nanoneedle material with a targeted virus killing effect. The preparation method comprises a chiral zinc oxide nanoneedle preparation step and polypeptide targeted ligand functionalization. The chiral zinc oxide nanoneedle obtained by the invention is a virus killing agent with virus killing activity under sunlight. The chiral engineering nanomaterial is a reliable platform for developing a photoresponse antiviral agent aiming at a conservative fusion mechanism, and the resistance to virus variation can be enhanced. The chiral zinc oxide nanometre with the targeted virus killing effect, provided by the invention, has important significance for coping with and complementing current protective equipment.

The invention belongs to the field of composite material electro-catalysis, and discloses a preparation method and application of a nano needle-shaped g-C3N4-FeNiMnCo composite material, and the nano needle-shaped g-C3N4-FeNiMnCo composite material is particularly used for producing hydrogen by electrolyzing water. The preparation method comprises the following steps: firstly, preparing g-C3N4, and then preparing the g-C3N4-FeNiMnCo composite material through a hydrothermal method. The nanoneedle of the obtained material is of a single-crystal fibrous structure which is smooth in surface and uniform in morphology, the top end is sharp, the diameter is uniform, the one-dimensional nanoneedle structure with the high aspect ratio provides an ideal path for rapid longitudinal transmission of charges, and exposure of more high-activity catalytic sites located at the edge and the defect position is facilitated. Meanwhile, tight interface coupling is formed between the FeNiMnCo high-entropy alloy nanoparticles and the g-C3N4 substrate, the structure can effectively promote interface charge transfer, and intrinsic activity and stability of the FeNiMnCo high-entropy alloy nanoparticles in the water electrolysis reaction are synergistically improved.

The invention belongs to the technical field of nano metal preparation, and particularly relates to a preparation method of a large-area metal nano needle tip on a flexible substrate. The preparation method comprises the following steps: preparing a chromium film with a micron hole array on the surface of a silicon substrate, etching by using an alkali solution to obtain inverted pyramid-shaped silicon holes, depositing a metal film on the silicon surface by using an electron beam thermal evaporation or sputtering mode, and removing a metal layer on the surface of a silicon wafer by using an adhesive tape to obtain the micro-porous silicon film. A flexible polymer is poured on the surface of a silicon wafer, a silicon substrate is corroded through alkali liquor after solidification, and the large-scale metal nano needle tip array on the flexible substrate is obtained. The template for preparing the metal nano needle tip can be repeatedly used, and the used metal only covers the surface of the needle tip, but does not influence the performance requirement of the metal needle tip, so that the preparation cost is greatly reduced; the prepared metal nano needle tip has extremely flat and sharp tip appearance.