85 results about "Piranha solution" patented technology

The invention discloses a method for preparing a graphene film on the surface of titanium alloy. The method specifically comprises the following steps of putting a medical titanium alloy into a piranha solution and carrying out hydroxylation treatment, and then putting into an amino silane solution, and self-assembling a silane film; carrying out ultrasonic treatment on graphene oxide powder to obtain a stable graphene oxide colloid; immersing the titanium alloy of which the surface is attached with the silane film in the graphene oxide colloid to prepare a silane-graphene oxide film; and finally, reducing the graphene oxide film with hydrogen halide acid, and drying to obtain the reduced graphene oxide composite film. The method disclosed by the invention is simple and causes no harm to experiment operators, and the obtained film has the advantages of good integrity, high strength, low coefficient of friction and excellent wear resistance and is expected to become a medical joint material.

The current methods for preparing single-layer molybdenum disulfide include micromechanical exfoliation, liquid-phase ultrasonic exfoliation, lithium ion intercalation, laser method, annealing layer-by-layer thinning method, and chemical vapor deposition method. Molybdenum disulfide prepared by chemical vapor deposition method has large size, uniform surface and controllable layer number. When molybdenum disulfide is prepared by chemical vapor deposition, molybdenum disulfide is easy to nucleate and grow on defects such as impurities or scratches on the substrate. If the substrate is not cleaned cleanly, molybdenum disulfide will easily grow into multi-layer or solid materials. To clean the substrate thoroughly, toxic and dangerous drugs such as acetone and piranha solution will be used. These drugs are toxic to the human body, so the operation process is potentially dangerous. Based on the above problems, the object of the present invention is to provide a simplified chemical vapor deposition method for the preparation of single-layer molybdenum disulfide, which can produce high-quality single-layer molybdenum disulfide without using toxic hazards such as acetone and piranha solution. Drugs are used to clean the substrate, avoiding potential danger.

The invention provides a preparation method of a silica-based surface carboxylated graphene oxide self-assembled composite film. The method comprises the following steps: 1, after a silicon wafer subjected to processing is cleaned and dried, putting the silicon wafer into a Piranha solution to soak; 2, taking out the silicon wafer in the Piranha solution, cleaning and drying the silicon wafer, adding the silicon wafer into a silane solution to carry out self-assembling reaction, thereby obtaining a product A; 3, taking out the product A, cleaning and drying the product A, thereby obtaining a silicon wafer with a silica-based surface on which an aminosilane film is arranged; 4, putting the product obtained in the step 3 into a graphene oxide solution subjected to carboxylation so as to carry out reaction, thereby obtaining a product B; and 5, taking out the product B, carrying out cleaning, drying and carrying out heat preservation on the product B so as to obtain a final product silica-based surface carboxylated graphene oxide self-assembled composite film. The friction coefficient of a product prepared by using the method disclosed by the invention is 0.18-0.22, and the wear life is greater than 2400 seconds; and the preparation method disclosed by the invention is simple in process and low in cost, and provides convenience for the surface treatment of silica-based parts in micro electro mechanical systems.

The invention relates to a preparation method of anti-fog self-cleaning glass with a composite coating. The method includes the following steps of soaking ordinary glass in a piranha solution to be subjected to surface hydroxylation, putting the glass where surface hydroxylation is conducted in methylbenzene, adding a silane coupling agent with amidogen as the end group to conduct surface end amination, adding the glass where surface end amination is conducted to graphene oxide organic solvent to be subjected to graphene oxide grafting under the effect of a dewatering agent, putting the glass where graphene oxide grafting is conducted in titanium dioxide sol, and conducting sedimentation and vacuum drying to obtain the anti-fog self-cleaning glass with the titanium dioxide and graphene oxide composite coating.

The method includes following steps: (1) preparation of self-assembly substrate, offering a P type Si(100) substrate that is treated by ultrasonic in organic solvent; after treated by placing into Piranha solution, and it is dried by blowing non-oxidizability gas, and then is treated by OTS solution and is cleaned up by using organic solvent; (2) nano-line etching, the nano-line is etched on self assembly substrate by using current of conduct atomic force microscope, the radius of curvature of pinpoint is less than 50 nm; (3) nanometer generating, the etched substrate is placed in the silver acetate for dipping, and then is taken out to place in ethanol in short time, and then is placed in sodium borohydride aqueous solution for dipping, washing, and then is dried by blowing non-oxidizbility gas, finally the silver enhancement solution is inputted for heighten the electrode line.

The invention discloses a method for constructing an organic micron linear array with a form board assisting in volatilization induced self-assemble. The method comprises the following steps that (1) a substrate is washed through cleaning fluid in an ultrasonic mode, then the substrate is immersed in the piranha solution and processed by an oxygen plasma, and the surface of the substrate is made to have strong wettability; (2) the form board is constructed on the substrate; (3) the micron linear array is grown on the form board, the pre-processed form board is inserted in the organic solution for growth, and through volatilization induced self-assemble, the large-area highly-aligned organic micron linear array is obtained. The method is of great significance to manufacturing of large-area high-performance photoelectron micro-nano devices based on organic optoelectronic materials and further achieving of micro-nano device integration.

The invention discloses a method for preparing fiber-loaded rutile type TiO2 composite SiO2 aerogel. The method comprises the following steps: performing hydroxylation treatment on fiber by using a piranha solution; soaking the fiber after hydroxylation treatment into a TiO2 solution, loading the surface of fiber after hydroxylation treatment with TiO2 sol by using a soaking-lifting method, and performing high-temperature so as to obtain fiber of which the surface is loaded with rutile TiO2; soaking the fiber of which the surface is loaded with rutile TiO2 into SiO2 sol so as to obtain SiO2 composite sol; performing aging, decontamination, solvent replacement, surface modification and normal-pressure drying on the SiO2 composite sol, so as to obtain the fiber-loaded rutile type TiO2 composite SiO2 aerogel. By adopting the method, not only is the problem that TiO2 is not uniformly dispersed in the SiO2 aerogel solved, but also the mechanical properties and the thermal-insulating heat-preservation properties of the SiO2 aerogel can be improved; by adopting the SiO2 aerogel composite material prepared by using the method, infrared radiation heat conduction can be effectively inhibited, and a relatively low heat conduction coefficient can be achieved.

The invention discloses a method for preparing a smooth graphene film by a pulling method. The method comprises the steps: adding graphene oxide into ultrapure water, and carrying out ultrasonic treatment, so as to prepare a uniform graphene oxide aqueous solution; pretreating a glass substrate by sequentially using a piranha solution and a toluene solution of 3-aminopropyl triethoxysilane; submerging the pretreated glass substrate into the prepared graphene oxide aqueous solution, and pulling out the glass substrate at a constant speed, so as to prepare a graphene oxide film; and carrying out reduction on the prepared graphene oxide film by using hydrazine hydrate steam, thereby preparing the graphene film. According to the method, the pulling technology used is simple in operation, low in cost and easy in control, and the prepared graphene film is smooth and uniform and is easily subjected to functional modification.

The invention relates to a three-dimensional nanometer chip and a method for fractionation detection on circulating tumor cells (CTC) by suing the chip, and application of the three-dimensional nanometer chip. The method comprises the steps: stripping and slicing a silicon wafer, heating in a piranha solution, then washing with water, drying by blowing, soaking in a 2 percent APTES ((3-aminopropyl)trimethoxysilane) solution for 2h, respectively cleaning the silicon wafer with absolute ethyl alcohol and deionized water, immersing in a 2.5 percent glutaraldehyde solution for 1h, putting in a culture chamber slide, uniformly dropping 10microgram/ml anti-EpCAM (epoxy resin cell adhesion molecules) on the silicon wafer, reacting for 0.5h at a room temperature, washing out redundant antibodies with a PBS (Phosphate Buffer Solution), and closing by using 25 microL of 1 percent BSA (Bovine Serum Albumin) solution for 1h to prepare the chip, wherein the chip can be used for capturing the circulating tumor cells in peripheral blood. The novel and convenient CTC capturing chip disclosed by the invention is capable of efficiently capturing the tumor cells in a laboortary; and compared with the prior art, the method has the advantages of being simpler, lower in cost and huge in clinical value.

The invention provides a preparation method of a silver island material. The preparation method comprises the following steps: firstly, a silicon wafer is sequentially treated by a piranha solution or a concentrated alkali liquor and sulfydryl silane, so that a modified silicon wafer is obtained; and secondly, an aldehyde compound is added to a silver-ammonia solution to react, the modified silicon wafer is added to the reaction system, a reaction product, silver, deposits on the surface of the silicon wafer, and the silver island material is obtained. According to the preparation method of the silver island material, the surface of the silicon wafer is modified before a silver island film is formed, so that the silver island film can be firmly fixed to the surface of the silicon wafer, and the silver island film is prevented from falling off in the follow-up application and treatment processes. By the adoption of the preparation method, the thickness of the silver island film can be controlled to be smaller than 100 nm, and the prepared silver island film is stable in size and has a relatively high capability of sensing SERS signals.

The invention relates to a method for assembling differently charged metal nanoparticles onto the surface of a substrate in a bidirectional and controllable manner. The method comprises the followingsteps of (a) placing the substrate into Piranha solution for surface hydroxylation, and washing and then immersing the surface-hydroxylated substrate into a mixed solution of 3-aminopropyl triethoxysilane, ethanol and water for surface positive charge functional group modification to obtain a first modified substrate, wherein the volume ratio of 3-aminopropyl triethoxysilane, ethanol and water inthe mixed solution is 1:50-150:0.5-5; (b) immersing the first modified substrate into succinic anhydride acetone solution for reaction to obtain a second modified substrate; (c) immersing the second modified substrate into metal nanoparticle solutions with different surface charge properties for self-assembly, then extracting, washing and blow-drying the immersed second modified substrate. Therefore, the method for assembling the differently charged metal nanoparticles onto the surface of the substrate in the bidirectional and controllable manner achieves self-assembly of differently charged metal nanoparticles and ensures a bidirectional and controllable process.

The invention discloses a large-area aluminum single crystal film and a preparation method and application thereof. The preparation method comprises the following steps: sequentially carrying out organic cleaning, RCA1 cleaning, RCA2 cleaning, piranha solution cleaning and HF cleaning on a Si (111) substrate to obtain a pretreated Si (111) substrate; and under a vacuum condition, placing the pretreated Si (111) substrate in a molecular beam epitaxy device for surface treatment, and growing an aluminum single crystal film on the surface of the Si (111) substrate by adopting a molecular beam epitaxy technology to obtain the large-area aluminum single crystal film. Compared with a Si substrate traditional technology, the Si (111)/Al single crystal film prepared through the method has the advantages that a large-area Al single crystal film is achieved, twin crystals do not exist, the content of C, H and O impurities on a Si/Al interface can be obviously reduced, the intrinsic quality factor of a resonator is improved to 106, and preparation of high-quality superconducting quantum bits or superconducting quantum computers is facilitated.

The invention discloses a volatile benzene adsorbing material and a preparation method thereof, and belongs to the technical field of material adsorption. The adsorbing material is activated fiberglass cotton, and the preparation method thereof comprises the following steps: under a stirring condition, slowly dropwise adding concentrated sulfuric acid with the volume percentage of 98% into an aqueous hydrogen peroxide solution with the volume percentage of 30% to prepare a piranha solution, wherein the volume ratio of the concentrated sulfuric acid to the aqueous hydrogen peroxide solution is7:3; then, adding fiberglass cotton, reacting at room temperature for 24 hours while stirring, taking out, washing by using ethanol, and drying in a drying oven to obtain the activated fiberglass cotton. The adsorbing material has a good effect of adsorbing benzenes, and for different benzenes, the aniline adsorbing efficiency is up to 63%.

The invention discloses a method for modification of steel fibers of a semi-metallic formula brake disc. The method comprises the following steps of 1, carrying out immersion by a sodium carbonate solution for oil removal, 2, immersing steel fibers in a dilute piranha solution, 3, treating the steel fibers by a coupling agent solution to coat films on the surfaces of the steel fibers, and 4, carrying out heat treatment for film curing, and carrying out scattering to obtain steel fibers coated with uniformly-distributed and suitable-thickness organic films. The method can successfully modify the steel fibers and solves the problem that a metal friction plate has poor heat fading performances and a short service life and produces rust easily. Through use of the modified steel fibers as a metal brake disc raw material, brake disc heat fading performances and a service life are greatly improved.

The invention provides a Josephson junction satisfying a large wafer size, a preparation method and an application. The Josephson junction is prepared by preparing a Ta (110) film on a substrate, preparing a superconducting circuit structure through photoetching, forming a lower electrode Ta (110) layer through mask photoetching, preparing a Ta2O5 oxide layer on the surface of the lower electrode Ta (110) layer as an intermediate layer, and forming an upper electrode Ta (110) layer through mask photoetching. The Ta (110) superconducting thin film is used as the lower electrode and the upper electrode of the Josephson junction, the Ta2O5 oxide layer on the surface of the Ta (110) superconducting thin film has the characteristics of compactness, stability and the like, passivation and optimization can be performed by adopting a piranha solution, photoetching residual glue is further removed, the stability of a superconducting circuit structure and the Josephson junction is ensured, the method has the characteristics of simple process steps, stability, controllability, high integration level and the like, and the method is suitable for large-scale production. Uniform and stable Josephson junctions in a large wafer size range can be prepared, and the method is suitable for regulation and control of Josephson junctions with different areas.

The invention discloses a preparation method of an immunosensor sensitive membrane for detecting antigens. It oxidizes the dried substrate by immersing it in piranha lotion until hydroxyl groups are evenly distributed on the surface of the substrate, and then reacts the hydroxyl groups on the surface of the substrate with the hydrolyzed 3-aminopropyltriethoxysilane until 3-aminopropyltriethoxysilane nanoparticles are evenly distributed on the surface of the substrate, and then the 3-aminopropyltriethoxysilane nanoparticles on the surface of the substrate are combined with protein A or protein G, and then passed on the above substrate The antibody corresponding to the antigen to be detected is dropped on the surface, so that protein A or protein G can bind to the antibody. The method of the present invention overcomes the shortcomings of weak connection of antibody molecules, effectively maintains the activity of antibody reactive molecules, and utilizes the specific orientation of protein A and protein G to improve the effectiveness of antibody-antigen binding by effectively controlling the consistency of antibody orientation. Thereby increasing the sensitivity of the sensor.

The invention provides a method for preparing the size-controllable nanoneedle type electrode, a laser drawing instrument is used for preparation, and compared with an existing nanoelectrode preparation technology, the size of a glass tube, drawing parameters, the drawing process and the electrode polishing end point are selected and designed. And the gold and platinum nano electrode with controllable electrode size is obtained by using a simpler and more effective method. And the fitting and melting conditions of the metal wire in the capillary tube in each drawing step are observed through a metallographic microscope, an electrode polishing end point feedback circuit is designed, and the polishing size of the electrode is accurately monitored. A piranha solution is used for treating the surface of the polished electrode, a scanning electron microscope (SEM) is combined for characterizing the accurately polished electrode, the apparent size of the nanoelectrode is tested through limiting current cyclic voltammetry, and the electrode with the minimum size of 6.4 nm can be prepared. And the size of the electrode is not changed after multiple cyclic voltammetry tests, so that the electrode prepared by the method has relatively high stability.

The invention relates to a making method of a spherical layered antimony sulfide film, and belongs to the technical field of production of functional materials through liquid phase deposition. A technical scheme adopted in the invention is characterized in that the method comprises the following steps: dissolving 0.003mol of analytically pure Na2S2O3.5H2O in deionized water, dissolving 0.002mol of analytically pure SbCl3.2H2O in concentrated HCl, mixing the above obtained two solutions, allowing the final volume of the mixed solution to 100ml, magnetically stirring the solution for 5min, and adding ammonia water in a dropwise manner to adjust the pH value of a precursor solution to realize different pH values; carrying out ultrasonic cleaning in distilled water, acetone and anhydrous ethanol for 30min, immersing in a piranha solution, carrying out nitrogen blow drying, and depositing the obtained glass substrate in the film precursor solution; and carrying out heat treatment on films obtained at different deposition temperatures for different deposition times at a certain temperature for 2h to obtain the spherical layered antimony sulfide film. The spherical layered antimony sulfide film is made on the glass substrate through a liquid phase deposition technology, and the method has the advantages of cheap making device, normal temperature and normal pressure making environment, and simple process flow.

The invention discloses a layered array method and device for depositing metal nanoparticles on a fiber end face. The method comprises the steps as follows: pretreatment of the fiber end face is carried out by using a piranha solution and a silane solution, and a monomolecular layer which can be combined with the metal nanoparticles firmly and easily is formed on the fiber end face; a reducing solution containing metal salt and a reducing agent is prepared, and two beams of laser are enabled to intersect and generate interference; and the fiber end face is placed in the intersecting area of the two beams of the laser in the reducing solution, and the periodic metal nanoparticle layered array corresponding to interfering light spots is formed on the fiber end face. Light for a deposition reaction is formed by interference generated by two beams of laser; the influence of optical fiber on reaction light is avoided; and the controllability of the silver nanoparticle deposition on the fiber end face is enabled to be higher.

The present invention discloses a method for preparing a perovskite quantum dot fluorescent ring from methylammonium lead bromide perovskite quantum dots. The method comprises: 1, washing a glass slide, wherein a piranha solution (comprising concentrated sulfuric acid and 30% hydrogen peroxide according to a ratio of 7:3) is poured, boiling is performed, an ethanol solution and a deionized water solution are sequentially poured, ultrasonic cleaning is respectively performed for 15-30 min, the glass slide is taken out, and blow drying is performed with nitrogen; 2, dissolving the dimethylformamide (DMF) solution of methylammonium lead bromide perovskite quantum dots in toluene to prepare a methylammonium lead bromide perovskite quantum dot toluene solution; and 3, dropping the methylammonium lead bromide perovskite quantum dot toluene solution on the glass slide by using a pipette, and waiting at a room temperature until the methylammonium lead bromide perovskite quantum dot toluene solution is dried so as to obtain the perovskite quantum dot fluorescent ring. According to the present invention, the perovskite quantum dot fluorescent ring is prepared based on the methylammonium lead bromide perovskite quantum dots, such that the self-assembly of the methylammonium lead bromide perovskite quantum dots is achieved, and the methylammonium lead bromide perovskite quantum dot fluorescent ring preparation method is firstly provided.

The invention discloses a preparation method of light trapping glass for a thin film solar cell. The method comprises the following steps: S1, immersing a glass substrate into a piranha solution and cleaning the glass substrate; S2, placing the glass substrate in a magnetron sputtering cavity, and adopting Ar ion beams to bombard the surface of the glass substrate for further cleaning of the glasssubstrate; S3, adopting an AZO target with Al dosage concentration being 0.5wt%-1.5wt% as a target material, and growing a first AZO thin film by sputtering with a radio-frequency and direct-currentcoupled sputtering technology; S4, adopting an AZO target with Al dosage concentration being 1.5wt%-2.5wt% as a target material, and growing a second AZO thin film by sputtering with the radio-frequency and direct-current coupled sputtering technology; S5, adopting an Ag target material, and growing an Ag thin film by sputtering with the radio-frequency and direct-current coupled sputtering technology; S6, adopting an AZO target with Al dosage concentration being 2.5wt%-3.5wt% as a target material, and growing a third AZO thin film by sputtering with the radio-frequency and direct-current coupled sputtering technology. With adoption of the method, haze and electrical properties of the light trapping glass can be improved, and AZO transparent conducting glass with high light transmittance and a light trapping function can be obtained.