443 results about "Zinc oxide nanorod" patented technology

The invention provides a substrate for surface enhanced Raman scattering. The substrate comprises a solid support, a zinc oxide nano rod layer, a noble metal nano particle layer and a hydrophobic layer, wherein the zinc oxide nano rod layer is formed on the surface of the solid support; the noble metal nano particle layer is formed on the zinc nano particle layer and covers the zinc nano particlelayer; the hydrophobic layer is formed on the surface of the noble metal nano particle layer; and the noble metal is gold or silver. Compared with the prior art, the substrate provided by the invention has good signal enhancing effect and high detection sensitivity, reduces the detection limit, and has good reproducibility. The invention also provides a preparation method for the substrate.

The invention belongs to the technical field of semiconductor film preparation, and particularly relates to a preparation method of a zinc-oxide nanorod array film. The technical scheme adopted by the invention is as follows: the preparation method comprises the following steps of: (1) on the basis of adopting height (001)-oriented ZnO as a seed layer, putting the ZnO seed layer into an aqueous solution of zinc nitrate (Zn(NO3)2), polyethyleneimine (PEI) and hexamethylenetetramine (HMT) for epitaxial growth to obtain a (001) preferred-orientation ultralong ZnO nanorod array film; (2) carrying out fast annealing treatment on the film, and improving the photoluminescence performance of the ZnO array film. The technology has the advantages that the continuous growth of the ZnO nanorod at the temperature higher than 100 DEG C can be realized; due to the high-temperature growth condition, the crystallization quality of the nanorod is improved, the internal defects are obviously reduced; the zinc-oxide nanorod array film has excellent photoelectric performance, and is more conductive to being applied in photoelectric devices such as dye-sensitized solar batteries, ultraviolet detectors, field-effect transistors, light-emitting diodes and nanogenerators.

A hybrid solar cell with an aluminum-doped zinc oxide nanorod as the electron transfer layer is composed of a transparent conducting glass substrate, the aluminum-doped zinc oxide nanorod electron transfer layer, a layered perovskite-like hybrid material CH3NH3PbX3(wherein X is Cl, or Br or I),2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene hole transfer layer and an Au metal back electrode layer, wherein all the parts form a laminated structure in sequence. The hybrid solar cell with the aluminum-doped zinc oxide nanorod as the electron transfer layer has the advantages that due to the fact that the aluminum-doped zinc oxide nanorod is used as the electron transfer layer in the hybrid solar cell, the specific surface area is large, electron-transport capacity is high, electron-hole combination is effectively restrained, and photoelectric conversion efficiency is high; the manufacturing method and technique are simple, reaction temperature is low, efficiency is high, raw materials are rich, cost is low, and environmental friendliness is achieved. The hybrid solar cell with the aluminum-doped zinc oxide nanorod as the electron transfer layer is suitable for industrialized large-scale production.

The invention relates to a method for preparing a one-dimensional self-assembly material with a ZnO nanorod array as a template. The method comprises the following steps: the ZnO nanorod array which is used as the template is immersed in a nitrate solution of a transition metal or a rare earth metal, and the ZnO nanorod array undergoes a hydrothermal reaction at 90-200DEG C. Compared with synthetic methods with other templates, the hydrothermal synthetic method with the ZnO nanorod array as the template has the advantages of simple technology, suitableness of the large area preparation and omission of a template removal step, so a difficulty that the film structure can be easily destroyed in the template removal process of the synthetic methods with other templates is solved.

The invention relates to a method for preparing zinc oxide nano-rods array membrane with controllable wettability, which belongs to a field of nano materials. The invention uses zinc acetate sol to prepare adhesive membrane on a basement through spinning technics; a crystal membrane is generated after annealing; the basement is positioned in mixed precursor solution of zinc nitrate and hexamethylene tetrammine and is hydro-deposited for 3-5 hours under a temperature ranging from 90 DEG C to 100 DEG C; the zinc oxide nano-rods array can be prepared on the basement. At the same time, by controlling concentration of the sol, times of spinning, temperature and time of annealing, controllability of the zinc oxide nano-rods array density and controllability of the array wettability can be realized; problem of unsteady wettability of the array can also be overcome.

The invention discloses a highly ordered zinc oxide nanometer rod electrode compound titanium dioxide electrode belonging to the technology of a dye-sensitized solar cell and a preparation method thereof. The method is as follows: depositing a layer of ZnO nano-crystal particles on a transparent electric conduction glass as a seed crystal surface, using a nonionic surface modifier and a zinc nitrate solution as a precursor, growing a ZnO nano rod array on the seed crystal surface and then calcining the ZnO nano rod array for a period of time in a certain temperature to prepare the highly ordered ZnO nano rod electrode, and finally forming a TiO2 membrane on the ZnO nano rod array electrode by a dip-coating method; the TiO2 membrane is sintered again to form the Zinc oxide/titanium dioxide hybrid electrode.

The invention discloses a silver nanoparticle-modified zinc oxide nanorod array, a preparation method thereof and application thereof. An array consisting of zinc oxide nanorods is arranged on a substrate; the length of the zinc oxide nanorods is 1 to 1.4mu.m; the diameter of the rods is 50 to 60nm; the size of silver nanoparticles at the top ends of the rods is 100 to 120nm; the size of the silver nanoparticles on the surfaces of the rods is 25 to 35nm; the distance between the particles is less than or equal to 10nm; the distance between the silver nanoparticles at the top ends of the adjacent rods is 40 to 60nm; and the distance between the silver nanoparticles on the surfaces of the adjacent rods is 25 to 35nm. The method comprises the following steps of coating a zinc acetate ethanol solution on the substrate; after drying the substrate, cleaning, dispersing and thermally decomposing the substrate to obtain a substrate on which a zinc oxide seed layer is coated; performing electro-deposition on the substrate coated with the zinc oxide seed layer in a zinc nitrate ammonia complexation solution to obtain a substrate with the zinc oxide nanorod array; and performing silver ion sputtering on the substrate in an ion sputter to obtain the target product. The silver nanoparticle-modified zinc oxide nanorod array can serve as an active substrate of SERS (Surface Enhanced Raman Scattering) and is used for measuring rhodamine 6G or polychlorinated biphenyl 77.

The invention discloses a preparation and application study of photoelectrochemical immunosensor for detection of carcinoembryonic antigen. ZnO nanorod-nanosheet with three-dimensional layered structure is grown on transparent conductive tin dioxide glass doped with fluoride, the ZnO nanorod-nanosheet is used to load a large amount of CdS quantum dots doped with manganese, aptamers for identifying carcinoembryonic antigen and DNA probes marked with CdTe/CdSe core shell quantum dots and hybridized with the aptamers to form a multivariate sensitizing structure based on ZnO, so that an initial signal amplification is achieved; in combination with the aptamers for specific recognition of carcinoembryonic antigen, the DNA probes are disintegrated from the hybridization to depart from the weakened sensitizing effect on the electrode surface and the steric hindrance of the conjugate formed by the carcinoembryonic antigen and the aptamers so that a further signal amplification is achieved, and further the sensitive detection of carcinoembryonic antigen is realized.

The invention discloses a direct vertical deposition method of a zinc oxide nanometer rod array on a titanium dioxide film, wherein the zinc oxide is an important inorganic semiconductor function material and arouses wide public concern due to the unique performances of catalysis, electricity, optics and photochemistry, and the like. Persons are interested in the control synthesis of one-dimensional zinc oxide due to the remarkable laser behavior of the one-dimensional zinc oxide. The method comprises the steps of: preparing titanium dioxide sol under room temperature; preprocessing; adhering with one layer of titanium dioxide sol on a preprocessed glass or an electric glass ITO by means of dipping and pulling; preprocessing titanium dioxide grains before drying and spinning; fixing a layer of titanium dioxide grains prepared by means of a sol-hydrothermal method on the substrate by means of spinning; drying; roasting to obtain the nanometer zinc oxide film; putting the zinc oxide film into a sealed water solution system of zinc salt and organic amine; reacting for 12-72 h under the reaction temperature of 45-90 DEG C; taking out; washing with secondary water; and drying. The invention relates to a nanometer material.

The invention discloses a preparation method for a novel ZIFs membrane containing zinc adopting sandwich structure and supported by a high temperature resistant zinc oxide nanorod. According to the invention, by introducing a layer of zinc oxide nanorod on a porous carrier as a bridge to connect the carrier and the ZIFs membrane to construct to form the sandwich structural membrane supported by the zinc oxide nanorod. The zinc oxide nanorod has the following functions: 1, modifying the carrier surface to facilitate the uniform growth of the ZIFs membrane; 2, acting as homogeneous phase induction nucleation growing point of the continuous growth of the ZIFs membrane to guarantee the complete formation of the membrane with high sieving property; acting as bridging liking effect between the carrier and the membrane layer to solve the combination problem between the membrane and the carrier and guarantee high stability of the membrane. Compared with a traditional preparation method of a ZIFs membrane, the membrane prepared by the invention not only has high separating property, high temperature resistance, but also has simple process, good repeatability, convenience in amplification of large-scale preparation, and wide application prospect.

The invention discloses a biomedical calcium phosphate/zinc oxide nano-rod array composite coating on the surface of a medical metal and a preparation method thereof. The biomedical calcium phosphate/zinc oxide nano-rod array composite coating is obtained by compounding biomedical calcium phosphate and a zinc oxide nano-rod array growing on the surface of a medical metal. One part of the biomedical calcium phosphate/zinc oxide nano-rod array composite coating comprises exposed zinc oxide nano-rod tips and the other part comprises calcium phosphate wrapping zinc oxide nano-rods. The biomedical calcium phosphate/zinc oxide nano-rod array composite coating has light-adjustable surface hydrophilicity and zinc ion slow-release properties. The preparation method comprises the following steps that a zinc oxide nano-rod array grows on the surface of a medical metal matrix with a zinc oxide crystal seed layer by a hydrothermal method; and a calcium phosphate coating is prepared by a sol-gel spin-coating method or a dip-coating method so that a part of zinc oxide nano-rods are exposed and calcium phosphate can wrap and strengthen the zinc oxide nano-rods. The biomedical calcium phosphate/zinc oxide nano-rod array composite coating has adjustable surface hydrophilicity and zinc ion slow-release properties and can be widely used for medical metal implants and other biomedical engineering fields.

The invention provides an electrode material of a three-dimensional C@MnO2 composite nanotube array super capacitor and a preparation method and application of the electrode material. A nanotube-shaped carbon layer is arranged inside the material, and a MnO2 material is arranged outside the material. The preparation method includes the steps that (1) a flexible carbon fiber cloth is subjected to pretreatment and magnetron sputtering to deposit a zinc oxide thin film; (2) zinc oxide nanorod array growth is conducted; (3) a zinc oxide nanorod array carbon cloth with the surface being coated with thin-layer carbon is prepared; (4) the carbon cloth obtained in the step (3) is used as a working electrode, and a three-electrode electrodeposition system is used for conducting manganese dioxide electrochemical deposition, flushing and drying to obtain the super capacitor electrode material which is of a three-dimensional C@MnO2 nanotube-shaped array structure. According to the material, the carbon material with good electrical conductivity and the MnO2 material with high specific capacitance and poor electrical conductivity are compounded, the advantages of the carbon material and the advantages of the MnO2 material are fully performed, due to hollow nanotubes, electrolyte solution ions can better enter and exit, and thus the rate capability of the capacitor can be greatly improved.

The invention relates to a method for preparing a hydrophobic lipophilic cotton fabric material through structuring a zinc oxide fine structure. The method comprises the following steps of: combining a sol-gel method with a hydrothermal method, i.e. uniformly laying prepared zinc oxide nano seed crystals on the surface of a cotton fabric through utilizing the sol-gel method at first, then growing zinc oxide nanorods toward fixed directions on the surface of the cotton fabric through utilizing the hydrothermal method, finally, modifying the cotton fabric through utilizing long-chain fatty acid-palmitic acid so as to have superhydrophobicity, and wrapping cotton with the cotton fabric for oil absorption. According to the method, the specific structure of zinc oxide is utilized to structure the superhydrophobic cotton fabric surface, and moreover, the cotton fabric has lipophilicity, good oil absorption after wrapping the cotton and a good practical application value in petroleum pollution water body remediation.

The invention relates to a preparing method for an oriented-zinc-oxide-nanometer-bar-loaded fiber membrane. The preparing method includes the following steps that a high-molecular polymer and zinc acetate are dissolved in an organic solvent, magnetic nanometer particles are added into the mixture, the mixture is fixed to be even, and then an electrostatic spinning solution is obtained; an ordered high-molecular polymer/zinc acetate/magnetic nanometer particle fiber is prepared with a magnetic-field-assisting electrostatic spinning technology; zinc salt, hexamethylene tetramine and ammonium hydroxide are mixed to be even in water, and a growth solution is obtained; the high-molecular polymer/zinc acetate/magnetic nanometer particle fiber is subjected to low-temperature heat treatment, the zinc acetate is converted into zinc oxide, then the zinc oxide is put into the growth solution, and the oriented-zinc-oxide-nanometer-bar-loaded fiber membrane is obtained after a reaction with the hydrothermal method. According to the preparing method, the reaction condition is wild, operation is easy, and the controllability is high; the product prepared with the method is not limited by application in the inorganic substance aspect, the photoelectric performance is excellent, and the catalytic degradation efficiency is improved.

The invention discloses preparation and an application of a plasma gold/zinc oxide composite nanosheet array device. The preparation of the composite nanosheet array device is that gold nanoparticles are deposited on a zinc oxide nanorod array with an in-situ photodeposition method, and the morphology of the zinc oxide array is gradually converted into a nanosheet structure from a nanorod structure. The synthesized plasma gold/zinc oxide composite nanosheet array device is adopted for efficient photocatalytic reduction of carbon dioxide, illumination is carried out for 3 hours, and the yields of methane and ethane reach up to 95%. The preparation method of the device is simple, experimental conditions are easy to control, and the device is low in energy consumption, low in raw material price, suitable for large-batch production, very friendly to environment, high in carbon dioxide reduction rate under sunlight illumination, good in photocatalytic activity and stability and expectedly applied to actual production of solar fuel.

Provided are a laser diode using zinc oxide nanorods and a manufacturing method thereof. The laser diode using zinc oxide nanorods according to one embodiment of the present disclosure includes: a wafer; an electrode layer formed on the wafer; a nanorod layer including a plurality of n-doped zinc oxide nanorods grown on the electrode layer; and a p-doped single crystal semiconductor layer that is physically in contact with the ends of the zinc oxide nanorods.

The invention provides a preparation method of a zinc oxide nanorod and relates to an inorganic nanomaterial. The preparation method comprises the following steps of: dissolving zinc salt into water; adding excessive aqueous alkali until white precipitate is completely dissolved; pouring the obtained solution into a polytetrafluoroethylene high-pressure kettle to perform hydrothermal reaction; filtering and washing; generating white precipitate; and drying to obtain zinc oxide nanorod. The prepared product is rod-like zinc oxide, wherein the diameter is about 150 nm and the average length is about 800 nm; the raw material cost is low; the process is simple and convenient to operate; high-temperature sintering is not required; yield is high; and the reaction condition is controllable. In addition, by the low-temperature preparation method, the process applicability of the nano zinc oxide in different fields can be enlarged.

A zinc oxide nanometer fiber cathode material for lithium ion battery and a preparation method thereof belong to the technical fields of high polymer material and chemical power source. The zinc oxide nanometer fiber material for lithium ion battery provided by the invention has large specific surface area. The method first prepares composite nanometer fiber by electrospinning, and then the nanometer fiber is subjected to high-temperature calcination to obtain the zinc oxide nanometer fiber. The preparation process provided by the invention is simple and easy to control, and has low production cost. The cathode electrode material for lithium ion battery provided by the invention overcomes the disadvantages of zinc oxide nanorod prepared by other methods as cathode material for lithium ion battery, such as low first cycling efficiency, weak cycle stability and high-rate discharge ability. The invention provides a zinc oxide nanometer fiber cathode material for lithium ion battery and the preparation method thereof. The material has high initial discharge capacity and cycling stability, improves high power characteristic and high-rate discharge capacity of cathode material, and is suitable for development requirements of lithium ion power battery for electric vehicles.

A process for preparing zinc oxide nanorods by hydrothermal decomposing and growth includes such steps as dripping concentrated ammonia water in the solution of zinc chloride while stirring, regulating pH=9-11, sealing, ultrasonic treating, inserting the clean substrate in it, sealing again, laying aside at 80-98 deg.C, taking the substrate, flushing by deionized water, and natural drying to obtain the zinc oxide nanorods on the surface of substrate.

The invention relates to zinc oxide/cuprous oxide nano heterojunction photocatalytic material, wherein the zinc oxide has the molecular formula of ZnO, and the cuprous oxide has the molecular formula of Cu2O. The ZnO/Cu2O nano heterojunction photocatalytic material comprises a silicon substrate, a Cu2O film and ZnO nano rods, wherein the Cu2O film is deposited on the silicon substrate, and the ZnO nano rod grows on the liquid phase of the Cu2O film. The method for preparing the ZnO/Cu2O nano heterojunction photocatalytic material comprises the following five steps: (1) preparing a substrate; (2) vacuumizing a sputtering film forming cavity; setting all parameters of a magnetically controlled sputtering device and depositing a Cu2O thin film layer; (4) obtaining a Cu2O thin film after stopping the magnetically controlled sputtering device for 30min; and (5) vertically putting the silicon substrate on which the Cu2O thin film is deposited into a beaker containing the mixed solution of zinc acetate and hexamethyleneimine, putting the beaker in a water-bath kettle to preserve heat for 6 hours, taking the beaker out of the water-bath kettle, cooling the beaker to room temperature, cleaning the beaker with deionized water, and drying the beaker at room temperature to obtain the growing ZnO nano rod array. The invention has wide use value and application prospect in the field of the preparation technology of the nano heterojunction photocatalytic material.

The invention discloses a p-CuO-n-ZnO solar cell. An indium-tin-oxide (ITO) substrate, a vertically oriented ZnO nanorod array, a CuO film and an Au electrode are superposed in sequence from the bottom layer to the top layer, wherein the vertically oriented ZnO nanorod array is used as an n-type semiconductor absorption layer, and the CuO film is used as a p-type semiconductor light absorption layer and a hole transporting layer. The preparation method of the p-CuO-n-ZnO solar cell comprises the following steps of: preparing a ZnO seed crystal layer on ITO by utilizing a sol-gel method; preparing the vertically oriented ZnO nanorod array by utilizing a chemical bath deposition method; preparing the CuO film on the ZnO nanorod array by utilizing an in-situ growth method; and sputtering the Au electrode by using an ion beam sputtering system. The invention has the advantages that the equipment adopted by the preparation method is simple, and the cost is low; as CuO is adopted to serve as the light absorption layer and the hole transporting layer, compared with organic materials, the CuO has higher electromigration capacity; and by combining with the electrical conduction characteristic of inorganic ZnO with high light absorption and low thermal emittance of the CuO, the photoelectric conversion efficiency of the solar cell can be effectively increased.