54 results about "Nanoparticle deposition" patented technology

The present invention relates to the field of fiber materials, and discloses a UHMWPE composite fiber with a functional coating and a preparation method thereof. The composite fiber comprises a UHMWPE fiber bundle with a three-dimensional woven structure, and a phenolamine co-deposition modification layer, an inorganic functional nanoparticle deposition layer, and a silk fibroin / polylysine cross-linked porous layer sequentially coated on the surface of the fiber bundle. The present invention sequentially deposits phenolamine and NPs on the surface of the UHMWPE fiber bundle with a three-dimensional woven structure, then constructs a silk fibroin coating with a microporous structure on the surface of the inorganic functional nanoparticle deposition layer to coat the NPs to improve the stability of the NPs, and then self-assembles polylysine with an antibacterial effect with the silk fibroin through electrostatic adsorption, and finally forms a silk fibroin / polylysine cross-linked porous layer after cross-linking. The UHMWPE composite fiber of the present invention has excellent mechanical properties, stability, antibacterial properties and bone regeneration promoting properties.

The invention discloses a surface-enhanced Raman detection method based on laser-induced deposition, and belongs to the technical field of micro-nano particle deposition and detection. According to the method disclosed by the invention, the gold nanoparticles and the to-be-detected particles are driven to be enriched and precisely deposited to a target area by utilizing laser local heating, and Raman detection is synchronously carried out, so that high-sensitivity detection on trace substances is realized. According to the method, the problems of uneven particle deposition, uncontrollable signal enhancement and the like in the traditional surface enhanced Raman scattering substrate preparation are solved, meanwhile, the requirement of an extra laser source in a traditional detection method is avoided, and integration of laser deposition and detection is realized.

The invention relates to a two-phase liquid cooling system based on a nanoparticle deposition boiling enhancement mechanism. The two-phase liquid cooling system comprises an external cooling unit, an immersion cooling cabinet, a cooling water distribution unit, a nanofluid distribution unit and a coolant distribution unit, the immersion cooling cabinet, the nanofluid distribution unit and the coolant distribution unit are all arranged in the cabinet area; the data center machine room is formed by connecting multiple cabinets in parallel. Compared with the prior art, through a simple and low-cost nano-particle self-assembly mode, the boiling capacity is improved, and meanwhile the improvement cost is reduced; a non-homogeneous wettability surface is prepared according to a self boiling mechanism, so that the energy utilization efficiency of the two-phase liquid cooling system is effectively improved; the deposition strength of the nanoparticles is controlled through the difference of the heat conduction materials, so that the boiling surface is selectively enhanced, the pool boiling effect is effectively improved, and the efficiency of a cooling system is improved.

A system for the synthesis of a cost-effective photocatalyst based on the FeOOH / CuBi2O4 heterostructure, consisting of: a) a CuBi2O4 synthesis plant for the production of CuBi2O4 (CBO) microspheres from Bi(NO3)3·6H2O and Cu(NO3)2.3H2O precursors; b) a heterostructure formation unit is configured to deposit FeOOH nanoparticles onto an outer surface of the CBO microspheres to form an FeOOH / CBO heterostructure; and c) a processing unit configured to wash and dry the FeOOH / CBO heterostructure to obtain the photocatalyst.

The invention provides a spherical silicon-based composite material and a preparation method thereof, a negative electrode and a battery, and relates to the technical field of silicon-based composite materials, the spherical silicon-based composite material comprises phenolic resin microspheres, a conductive agent and silicon nanoparticles, the phenolic resin microspheres are doped with the conductive agent to form a matrix of the spherical silicon-based composite material, and the silicon nanoparticles are doped with the conductive agent to form the spherical silicon-based composite material. The phenolic resin microspheres are of a regular spherical structure, grooves or protrusions or the combination of the grooves and the protrusions are arranged on the outer surfaces of the phenolic resin microspheres, the conductive agent is evenly dispersed in the phenolic resin microspheres, and part of the conductive agent is dispersed on the outer surfaces of the phenolic resin microspheres. The matrix is activated to form porous carbon microspheres with discontinuous porous channels or pores, and the silicon nanoparticles are deposited in the porous channels or pores. The problems that the ion conduction rate of the spherical silicon-based composite material is reduced and the conductivity is reduced can be solved, so that the first efficiency and the cycle stability of the spherical silicon-based composite material are improved.

The invention discloses a method for preparing a water inlet separation net loaded with copper oxide nanoparticles and having a self-cleaning function, and particularly relates to a method for preparing the water inlet separation net with the self-cleaning function by constructing a dopamine coating on a polypropylene separation net and then loading the copper oxide nanoparticles. The preparation method comprises the following steps: introducing a dopamine solution to the surface of a polypropylene separation net to form a polydopamine coating, chelating Cu by using surface functional groups of the polydopamine coating, then forming Cu (OH) in an alkaline environment, and further converting the Cu (OH) into CuO nano-particles to be deposited on the surface of the separation net; the finally prepared functional separation net is stable in structure, has self-cleaning capability, and can effectively slow down pollution in roll-type reverse osmosis and nanofiltration membrane elements.

A device directed to a continuous feed processor of waste material having a receiving chamber with first and second openings with the first opening accepting waste material, a rotary heating chamber having starting and finishing openings with the starting opening connected to the second opening of the receiving chamber, and a heat source for heating the rotary heating chamber is presented. Also presented is a material removal opening connected to the finishing opening of the rotary heating chamber, and a post-heating chamber connected to the finishing opening of the rotary heating chamber. The post-heating chamber comprising one or more processing modules selected from a hydrocracking module, a nanoparticle deposition module, and a catalyst-based gas conversion module.

Methods of depositing nanoparticles onto a substrate (e.g., an implant) are provided, as are the resulting substrates (e.g., implants) formed by such deposition methods. The nanoparticles can be silver nanoparticles that provide antimicrobial or antibacterial properties to the substrate.

Provided herein is a method that utilizes the production of photocatalytic nanoparticles in situ by flame spray pyrolysis (FSP) and the deposition of the nanoparticles on a substrate via aerosol deposition to produce a photocatalytic nanoparticle film on the substrate, a process of subsequently immersing the photocatalytic nanoparticle film with a polymer solution or a liquid polymer precursor material to form a composite layer. The method used results in a composite layer comprising an osmotic network of photocatalytic nanoparticles in a polymer matrix wherein the composite layer has enhanced durability and remains active after several irradiation cycles, which is an improvement to currently known coatings.

To provide an optoelectronic device having a nanoparticle deposition layer.SOLUTION: The layered semiconductor device includes at least one grain structure disposed on an underlying layer comprising a grain material in contact with a contact material selected from a seed material, a co-deposited dielectric material, and / or at least one patterning material. A method for controllably selecting formation of at least one grain structure on an underlying layer during fabrication of a device includes depositing at least one layer comprising the underlying layer and exposing a surface thereof to a flux of grain material that contacts a contact material and coalesces to dispose the at least one grain structure on the underlying layer.SELECTED DRAWING: Figure 1

The invention relates to the technical field of carbon fiber surface modification, in particular to modified carbon fiber, a modified carbon fiber reinforced composite material and a preparation method of the modified carbon fiber reinforced composite material. The carbon fibers are subjected to dual composite modification through magnetic field-assisted electrophoretic deposition and ultrasonic-assisted impregnation, so that the surface performance of the carbon fibers is improved, and rich functional groups are introduced; meanwhile, a magnetic field assisted electrophoretic deposition method is adopted, a uniform electric field is formed, and the deposition efficiency and uniformity of electrophoretic deposition are improved; an ultrasonic-assisted impregnation process is adopted, so that aramid nanofibers, MXene, graphene oxide, carbon nanotubes or chitosan are prevented from being agglomerated on carbon fibers, and nanoparticles are more uniformly deposited. The interface bonding force between the carbon fibers and the thermoplastic resin is improved through the uniformly deposited modified substances and dual modification synergism, and the interlayer shear strength of the composite material is improved.

The invention discloses a preparation method of a Ti4O7 doped high-emissivity film layer. The method comprises the following steps: 1, cleaning and drying a substrate; secondly, after the mask plate and the base body are attached, multi-arc ion plating deposition is carried out; 3, micro-arc oxidation; and 4, putting the substrate subjected to micro-arc oxidation into a hydrothermal solution containing Ti4O7 nanoparticles for hydrothermal treatment, and washing, drying and curing to obtain the substrate with the Ti4O7 doped high-emissivity film layer. The composite film layer is prepared by combining multi-arc ion plating, micro-arc oxidation and hydro-thermal treatment processes, the specific surface area and roughness of a matrix are increased by constructing a convex columnar array structure through multi-arc ion plating, and a large number of Ti4O7 nanoparticles are promoted to deposit into the film layer prepared through micro-arc oxidation through hydro-thermal treatment, so that the emissivity of the film layer is greatly improved; and the film is high in film-substrate binding force and high in high-temperature resistance, and is suitable for the field of heat dissipation of key structural parts of aerospace ion electric propulsion.

Systems and methods are provided to accurately model nanoparticle deposition in human or animal vasculature while reducing computational costs though a number of specific algorithmic improvements. These methods can be used to virtually evaluate the effects of variations in the nanoparticle configuration (e.g., size, geometry, binding target and / or affinity) and / or timing of delivery (e.g., relative to a patient's circadian rhythm), allowing those properties to be improved in order to increase the nanoparticle dose delivered to an anatomical target and / or to reduce side effects by reducing the total nanoparticle dose used to obtain a specified therapeutically effective level of deposition at the anatomical target. The accuracy and reduced computational cost of these methods allows the simulation to be re-run based on individual patients' data (e.g., MRI or otherwise-obtained maps of vascular geometry), allowing the nanoparticle configuration and / or dosing to be adapted on a per-patient basis.

The application discloses a kind of implant piezoelectric nano coating and its preparation method and application.The nano coating is composed of nano-flower-shaped barium titanate and gold nanoparticles loaded on its surface.In this application, gold nanoparticles are deposited on nano-barium titanate at high temperature by using the method of sodium citrate reducing tetrachloroauric acid. The nBTO@Au prepared by this method has obvious osteogenesis and antibacterial properties. The application provides a high reactivity, catalytic and non-invasive immediate treatment mode for peri-implantitis, which has wide application potential in implant post-disinfection, peri-implantitis treatment and improving implant survival rate.

The present invention belongs to the field of photocathodic protection. Specifically, the present invention relates to a CdS / rGOQDs / TiO2 branched nanowire array composite photoelectric film, its preparation method, and application. A TiO2 nanowire array substrate film with a branched structure is constructed by a simple in-situ hydrothermal method. Then, rGO quantum dots and CdS nanoparticles are deposited thereon by constant current cathode reduction deposition and continuous ion layer adsorption reaction, thereby constructing a CdS / rGO QDs / TiO2 branched nanowire heterojunction photoelectrode with sufficient interface contact. Under simulated sunlight irradiation, the composite film can achieve photocathodic protection for a variety of metal materials (such as 316L SS and Cu) in seawater, and has the advantages of simple operation and high photoelectric conversion efficiency.

The present invention provides a NO2 sensor based on quantum dot-assembled SnO2 nanoparticles and a preparation method thereof, belonging to the technical fields of NO2 sensors and quantum dot nanomaterials, including a sensor device substrate, interdigital electrodes from bottom to top, and a gas-sensitive layer formed by depositing SnO2 nanoparticles; the SnO2 nanoparticles are of a porous structure, with a size of 20-200 nm, assembled from SnO2 quantum dots, and are prepared by the solvent evaporation method of acetylacetone chelating agent in sequence, pyrolyzing at a heating rate of 1-3 °C / min to 300-350 °C for 3-5 h under nitrogen, and annealing at a heating rate of 5-10 °C / min to 450-500 °C for 0.5-1.5 h under air; the size of the SnO2 quantum dots is 4-6 nm. The NO2 sensor of the present invention can work at room temperature, has the advantages of fast response / recovery speed, wide detection range, ultra-low detection limit and ultra-high sensitivity, and has ultra-high selectivity for NO2.

The embodiment of the invention discloses a circular polarization waveguide device, a preparation method and application. The preparation method comprises the following steps: alternately depositing two or more materials with different refractive indexes on a substrate to form a reflector substrate with a periodic multilayer film structure; assembling a light-emitting gain medium on the reflector substrate to obtain a light-emitting layer; metal chiral nano-particles are deposited on the light-emitting layer to serve as a coupling incident end of circularly polarized light conduction, and achiral metal nano-particles are deposited on the light-emitting layer to serve as a coupling emergent end of circularly polarized light conduction. According to the invention, the light-emitting layer is arranged between the chiral plasmon particles and the emitter substrate surface guide mode, and the achiral nanoparticles are used as coupling output ends, so that remote directional transmission of optical signals and enhancement of coupling efficiency are realized without an additional waveguide structure.

The application discloses a kind of touch screen cover plate multicolor connection printing processes, comprising the following steps: using design software design the pattern of touch screen cover plate, prepare suitable substrate, prepare nanoparticle deposition ink, print the conductive pattern of bottom layer on substrate surface, accurate alignment is carried out to the conductive pattern of bottom layer of inkjet printing, the printed conductive pattern of bottom layer is heat treated, color pattern is printed on the conductive pattern of bottom layer, thin layer of conductive is deposited on the color pattern of jet printing, heat treatment and solidification.The application adopts nanoparticle deposition technology and inkjet printing technology, can realize higher resolution, richer color selection and more delicate pattern performance, the conductive coating prepared by nanoparticle deposition technology has good adhesion and durability, because nanoparticle can form uniform, dense coating structure on substrate surface, and is closely combined with substrate surface, so as to improve the adhesion and durability of coating.

The present invention relates to a method for preparing a TiO2 plasma composite electrode modified with Au nanoparticles. The method comprises the following steps: (1) preparing a planar or curved TiO2 electrode: using spray pyrolysis to prepare a TiO2 electrode or a SiO2@TiO2 two-dimensional photonic crystal on an ITO glass substrate; (2) depositing Au nanoparticles: using vacuum evaporation to deposit Au nanoparticles on the substrate in a single step, strictly limiting the evaporation rate, to produce the Au nanoparticle-modified TiO2 plasma composite electrode. This preparation method optimizes the Au nanoparticle deposition process, avoiding the subsequent high-energy calcination process that affects the physical properties of the Au nanoparticles. It also allows for controllable adjustment of the Au nanoparticle size, resulting in a plasma electrode with a wide visible light absorption range, strong light absorption capacity, and excellent photoelectric performance.

The application belongs to the technical field of electrochemical sensing, and particularly discloses an electrochemical aptamer sensor for detecting Cd 2+ based on HCR reaction and application thereof. The electrochemical aptamer sensor comprises a reaction sheet and a detection solution, the detection solution comprises a hairpin probe H1 solution, a hairpin probe H2 solution, an AgNO3 solution and a NaBH4 solution, and the reaction sheet comprises a PET substrate and a working electrode, a graphite counter electrode and a silver / silver chloride reference electrode fixed on the PET substrate by silk screen printing; the working electrode is an Apt modified electrode, which is prepared through gold nanoparticle deposition and Apt solution incubation reaction steps. The electrochemical aptamer sensor captures Cd 2+ by coupling Apt on the electrode surface, triggers HCR reaction amplification signal through Apt which does not capture Cd 2+ , and effectively solves the signal interference problem by detecting the LSV signal of in-situ generated silver nanoclusters, so as to realize high sensitivity, high specificity and rapid detection of Cd 2+ .

The invention discloses an implant piezoelectric nano coating as well as a preparation method and application thereof. The nanometer coating is composed of nanometer flower-shaped barium titanate and gold nanoparticles loaded on the surface of the nanometer flower-shaped barium titanate. According to the invention, gold nanoparticles are deposited on nano barium titanate at a high temperature by using a method of reducing tetrachloroauric acid by using sodium citrate, and nBTOatAu prepared by using the method has obvious osteogenesis and antibacterial properties. The invention provides a high-reactivity, catalytic and non-invasive immediate treatment mode for the peri-implantitis, and has wide application potential in the aspects of post-implant disinfection, peri-implantitis treatment and implant survival rate improvement.

The invention relates to the technical field of gypsum, and discloses a preparation method of mildew-proof formaldehyde-removing gypsum, which comprises the following steps: S1, loading Pd-Cu quantum clusters on a ZIF-8 carrier by adopting a microwave plasma sputtering method under the conditions that the microwave power is 300-600W and the concentration of a precursor solution is 0.05-0.2 mol / L; s2, Au nanoparticles are deposited on the surface of BiOI / BiVO4 through a chemical vapor deposition method, the deposition temperature ranges from 300 DEG C to 400 DEG C, and the carrier gas flow ranges from 50 mL / min to 150 mL / min; and S3, chitosan / PNIPAMJanus particles are prepared through a micro-fluidic interfacial polymerization method, and Ag-Pd bimetallic particles are packaged on the chitosan / PNIPAMJanus particles. The Pd-Cu quantum clusters are loaded by adopting a microwave plasma sputtering method, and the catalytic formaldehyde decomposition efficiency is improved by 175%. Through quantum confinement effect and bimetallic cooperation, the problem that active sites are uncontrollable is solved.

The invention belongs to the technical field of interface thermal resistance measurement, and particularly relates to a method for measuring solid-liquid interface thermal resistance of a single micro-nano particle based on differential Raman. Comprising the following steps: preparing dispersedly distributed micro-nano particles on a quartz substrate, wherein the micro-nano particles have a Raman effect; performing two groups of differential flash Raman-based temperature rise measurement tests on the single micro-nano particle to obtain an average temperature rise ratio of the single micro-nano particle; and establishing an average temperature rise ratio relationship of the micro-nano particles, and solving the solid-liquid interface thermal resistance of the micro-nano particles and the liquid based on the temperature rise ratio obtained by the test. According to the invention, through combination of tests and theoretical formulas, quartz is used as a substrate, silicon nanoparticles are deposited on the substrate, and the interface thermal resistance between silicon particles and liquid is measured; and the blank of measuring the thermal resistance of the solid-liquid interface of the nano-particles by adopting an experimental method is filled.

The invention belongs to the technical field of biosensors, and particularly relates to an electrochemiluminescence biosensor for detecting diethylstilbestrol as well as a preparation method and application of the electrochemiluminescence biosensor for detecting diethylstilbestrol. The preparation method comprises the following steps: dispensing a ZnRuMOF solution on a glassy carbon electrode (GCE), and drying; depositing gold nanoparticles on the surface of the glassy carbon electrode; dripping H5, and hatching at 37 DEG C; mCH is added for a reaction, and PBS washing is carried out to remove excessive MCH; and finally, dropwise adding the activated Cas 12a-crRNA compound on a glassy carbon electrode, and hatching to obtain the Cas 12a-crRNA / MCH / H5 / AuNPs / ZnRuMOF / GCE electrochemical luminescence biosensor which is used as a working electrode for electrochemical luminescence test. According to the diethylstilbestrol detection method, the target object can be efficiently, sensitively and rapidly detected, the analysis simplicity and the detection accuracy are remarkably improved, and an innovative and sensitive detection platform is provided for diethylstilbestrol analysis.

The application discloses a method for forming an antibacterial layer on the surface of a corneal molding lens by using a gas deposition method, and is characterized by comprising the following steps: using a chemical vapor deposition method to sequentially deposit polydimethylsiloxane (PDMS), silver nanoparticles and nanoscale titanium dioxide (TiO2) on the surface of the corneal molding lens; wherein the temperature of the PDMS deposition process is controlled at 150°C to 200°C, the pressure is 1 to 2 Torr, and the deposition time is 10 to 20 minutes; the temperature of the silver nanoparticle deposition process is controlled at 200°C to 250°C, the pressure is 0.5 to 1.5 Torr, and the deposition time is 15 to 30 minutes; the temperature of the TiO2 nanoparticle deposition process is controlled at 250°C to 300°C, the pressure is 0.8 to 1.5 Torr, and the deposition time is 20 to 40 minutes; the method not only improves the safety and comfort of the corneal molding lens, but also significantly enhances the antibacterial ability of the corneal molding lens, thereby protecting the eye health of the wearer and prolonging the service life of the lens.

A layered semiconductor device comprises at least one particle structure disposed on an underlying layer that comprises a particle material in contact with a contact material selected from: a seed material, a co-deposited dielectric material and / or at least one patterning material. A method for controllably selecting formation of the at least one particle structure on an underlying layer during manufacture of the device comprises depositing at least one layer, including the underlying layer, and exposing its surface to a flux of a particle material such that it comes into contact with the contact material, and coalesces to dispose the at least one particle structure on the underlying layer.

A ceramic coating is deposited onto at least one surface of a chamber component for a process chamber using a cold spray deposition process. The cold spray deposition process propels agglomerates of nanoparticles of a ceramic and deposits the agglomerated nanoparticles of the ceramic onto the at least one surface to form the ceramic coating without causing the particles to undergo a phase change.

Metastable alloys have recently emerged as high-performance catalysts, extending the toolbox of binary alloy materials that can be utilized to mediate electrocatalytic reactions. In particular, nanostructured metastable ordered intermetallic compounds are particularly challenging to synthesize. Here the present invention is directed to a method for synthesizing sub-15 nm metastable ordered intermetallic Pd31Bi12 nanoparticles at room temperature, in a single step, by pulsed electrochemical deposition onto high surface area carbon supports. The resulting Pd31Bi12 nanoparticles displays a 7× enhancement of the mass activity relative to Pt / C and a 4× enhancement relative to Pd / C for the oxygen reduction reaction (ORR). The high performance of Pd31Bi12 nanoparticles is demonstrated to arise from reduced oxygen binding caused by alloying of Pd with Bi. The isolation of Pd-sites from each other facilitate methanol tolerant ORR behavior.

The present invention discloses a method for optimizing the hydrogen evolution performance of a Raney nickel electrode in an alkaline electrolytic cell. The method for optimizing the hydrogen evolution performance of the present invention comprises: selecting a three-electrode electrochemical system consisting of a platinum counter electrode, a Raney nickel working electrode, a reference electrode and a sulfuric acid electrolyte, scanning the three-electrode electrochemical system by cyclic voltammetry, and first oxidizing and then reducing the platinum on the platinum-based counter electrode to deposit nanoparticles on the surface of the Raney nickel. The method for optimizing the hydrogen evolution performance of the present invention has a simple process, low cost, no environmental pollution, and high atomic utilization, further optimizes the performance of the Raney nickel, reduces the energy consumption of hydrogen production, and achieves cost reduction and efficiency improvement of green hydrogen.

The invention relates to the field of nano material preparation and SERS (Surface Enhanced Raman Scattering) analysis, and particularly provides a preparation method of a high-yield silicon-based SERS substrate material. The method mainly comprises the following five steps of silicon wafer cleaning pretreatment, silicon wafer HF treatment, Ag nanoparticle deposition on the surface of the silicon wafer, Au-Ag nanoparticle deposition on the surface of the silicon wafer and silicon wafer aftertreatment. The silicon-based SERS substrate material prepared by the method shows high SERS activity (enhancement factor EFgt; 108) and good surface uniformity (RSDlt; 15%). In addition, the SERS substrate materials prepared in different batches keep high yield (95%). The method disclosed by the invention has the advantages of simple preparation process, low cost, short consumed time, high yield and the like, and is expected to be applied to the fields of commercial SERS substrate preparation and analysis thereof.