254results about "Nanomagnetism" patented technology

Microparticles for detecting biological materials are provided. Each of the microparticles includes: a core-shell structured microparticle consisting of a core including a magnetically responsive metal and a shell layer surrounding the core and having a uniform thickness; and capture probes introduced onto the shell layer to capture biological materials.

This disclosure provides nanoparticle compositions, and use thereof for isolating and measuring proteins, protein degrader action, and cells. The disclosed nanoparticles can be identified by barcodes that reveal the identity of and post translational modifications to the bound protein using image processing techniques described herein.

A raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution are added to a reaction system to adjust the pH of the reaction system from 1.0 to 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and the pH of the reaction system is then neutralized from 7.0 to 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide, followed by heating so as to form particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements, and then, a slurry containing the particles is classified. The iron-based oxide magnetic powder has a particle shape close to a perfect sphere and is suitable for use in a magnetic recording medium.

The application relates to a method for one-step synthesis of strong magnetic hydrophobic Fe3O4 nanoparticles at low temperature and the Fe3O4 nanoparticles and application, and belongs to the technical field of nano material preparation. The method comprises the following steps: adding a ferrous sulfate solution into a mixed solution of sodium hydroxide and sodium nitrate, heating and stirring to react, adding oleic acid in the reaction process, and obtaining black Fe3O4 crystals after the reaction is completed. The saturation magnetization of the obtained strong magnetic hydrophobic Fe3O4 nanoparticles can reach 85.69 emu / g at most, and the water contact angle can reach 148.95 DEG. The one-step synthesis reaction only needs to use oleic acid as a regulator, avoids an extreme high-temperature and high-pressure environment, does not need to use a toxic chemical solvent, the condition is mild, the process is simple, the operation condition is easy to control, and the method has a wide application prospect.

A semiconductor process integrates three bridge circuits, each include magnetoresistive sensors coupled as a Wheatstone bridge on a single chip to sense a magnetic field in three orthogonal directions. The process includes various deposition and etch steps forming the magnetoresistive sensors and a plurality of flux guides on one of the three bridge circuits for transferring a "Z" axis magnetic field onto sensors orientated in the XY plane.

[Problem] To electrically connect a lead layer and a protective film reliably even when the film thickness of a protective film that covers a functional film is extremely thin. [Solution] After the conductive protective film 51 is formed on the surface of the functional film 20, reverse sputtering is performed while a portion of the surface of the protective film 51 is covered with a mask 60, thereby physically restoring a natural oxide film 52 formed on the surface of the protective film 51 not covered by the mask 60. Thereafter, a lead layer 40 is formed on the surface of the protective film 51 not covered by the mask 60. Consequently, since the natural oxide film 52 formed on the surface of the protective film 51 can be removed without performing etching, the lead layer 40 and the protective film 51 can be connected electrically without damaging the functional layer 20 even when the film thickness of the protective film 51 is extremely thin.

A computing element is provided. The computing element includes a) an artificial lattice comprising a multiplicity of connecting elements separated by pores; b) a plurality of input channels attached to the artificial lattice each configured to provide at least one of an electrical current and voltage to the artificial lattice; c) a plurality of readout channels attached to the artificial lattice, wherein each readout channel of the plurality of readout channels is connected to a common ground; and d) one or more sensing elements positioned at least one of perpendicular and along to the plurality of input channels and attached to the artificial lattice, wherein the one or more sensing elements configured to read a readout to create an output.

The application discloses doped modified manganese iron phosphate with a nanoporous structure, a preparation method and application thereof. 1‑a‑b Fe a M b PO4, 0.01<=a<=0.98, 10 ‑4 <=b<=10 ‑2 M is a combination of one or more selected from magnesium, titanium, vanadium, chromium, cobalt, nickel, zinc, gallium, aluminum, zirconium, niobium, molybdenum, tin, antimony, calcium, barium, strontium, boron, ruthenium, silicon, tellurium, copper and lithium, and the particle size is below 50 nm, and the material also has a porous structure. The material can be used for preparation of lithium manganese iron phosphate positive electrode materials in lithium ion batteries, and the specific capacity, rate and cycle performance of the obtained positive electrode materials are improved.

This invention belongs to the field of tertiary oil recovery technology, specifically relating to a CO2-switched magnetically driven nanoparticle, its preparation method, and its application. The magnetically driven nanoparticles are silica-coated Fe3O4 nanoparticles. The surface of the silica coating is further modified with amidine groups to act as CO2 switches. These CO2 switches cause the hydrophilicity of the magnetically driven nanoparticles to increase with the increase of CO2 solubility in the solution in which they are located. This invention integrates emulsification and demulsification functions through the CO2 switch loaded on the surface of the magnetically driven nanoparticles. Furthermore, the particles can be recycled using their own magnetic response, reducing costs. This nano-displacement agent can solve the problems of poor efficiency, ineffective oil-water separation, high economic costs, and environmental impact associated with existing displacement agents.

A spin orbit torque (SOT) magnetic tunnel junction (MTJ) device includes a substrate, a seed layer over the substrate, and a bismuth antimony (BiSb) layer having a (0120) orientation on the seed layer. The seed layer includes a silicide layer and a surface control layer. The silicide layer includes a material of NiSi, NiFeSi, NiFeTaSi, NiCuSi, CoSi, CoFeSi, CoFeTaSi, CoCuSi, or a combination thereof. The surface control layer includes a material of NiFe, NiFeTa, NiTa, NiW, NiFeW, NiCu, NiCuM, NiFeCu, CoTa, CoFeTa, NiCoTa, Co, CoM, CoNiM, CoNi, NiSi, CoSi, NiCoSi, Cu, CuAgM, CuM, or a combination thereof, where M is Fe, Cu, Co, Ta, Ag, Ni, Mn, Cr, V, Ti, or Si.

The application provides a method for preparing a magnetic heterostructure material of magnetite-graphene and application of the magnetic heterostructure material in a directional heat-conducting composite material, and belongs to the technical field of composite materials. The method comprises the following steps: (1) slowly adding a sodium hydroxide solution into a ferric chloride solution under water bath condition to prepare a ferric hydroxide gel, and sequentially performing drying and aging, centrifugation, cleaning and freeze drying on the gel to obtain a ferrous oxide nanocrystal; (2) adding the ferrous oxide nanocrystal, graphene and dopamine hydrochloride into a Tris buffer solution and fully stirring, and performing multiple centrifugation, cleaning and freeze drying to obtain ferrous oxide-dopamine-graphene; and (3) performing calcination reduction on the ferrous oxide-dopamine-graphene to obtain the magnetic heterostructure material of magnetite-graphene. The magnetic heterostructure material prepared by the method can be applied to the preparation of the directional heat-conducting composite material as a heat-conducting filler, and has the advantages of high operability, low cost and the like.

The present invention provides a nickel nanowire that does not break readily under stress. The present invention relates to a nickel nanowire having a face-centered cubic lattice structure and a crystallite size of 10 nm or less in the (111) lattice plane orientation.

The invention relates to high-frequency ultralow-loss iron-nickel alloy powder and a preparation method thereof.The powder comprises a powder core composed of iron-nickel alloy, the core comprises, by weight, 75.5%-77.5% of nickel, 4.5%-6.5% of molybdenum, 2%-3% of lanthanum and titanium, the mass ratio of lanthanum to titanium is 2: 1, and the balance is iron and inevitable impurities; the surface of the powder core is coated with an insulating metal oxide layer with the average thickness of 3 nm to 10 nm. The soft magnetic material prepared from the high-frequency ultralow-loss iron-nickel alloy powder has excellent high-frequency magnetic conductivity and low power loss, the high-frequency magnetic conductivity'under 50 MHz is 38-49, the power loss under 100 KHz / 100 mT is 260-281 mW / cm < 3 >, and high magnetic conductivity and power loss are still achieved under the high-frequency condition.

The invention relates to the technical field of magnetic particle imaging, in particular to a core-shell nanoprobe and a preparation method and application thereof.The core-shell nanoprobe comprises a magnetic core and a nanoshell which is located outside the magnetic core and has a magnetic shielding response function, and the structure of the nanoshell collapses under the tumor microenvironment condition; the saturation magnetization of the magnetic core is greater than or equal to 50 emu / g, and the coercive force is less than or equal to 5 Oe; the saturation magnetization of the nano shell is less than 50 emu / g, and the coercive force is more than 5 Oe. According to the core-shell nanoprobe, through a unique magnetic core-shell structure design and tumor microenvironment response characteristics, a magnetic shielding layer is formed by using a low-signal nano shell with a response magnetic shielding function, and background signal interference is inhibited. In a tumor microenvironment, the shell structure of the core-shell nanoprobe collapses, the magnetic core is exposed, and a high magnetic signal is released and generated, so that the imaging signal-to-noise ratio is remarkably improved. According to the invention, the bottleneck that the traditional MPI probe is lighted in the whole course can be broken through, the tumor specificity is lighted and positioned, and the problems that the external background of the tumor is high, the contrast ratio is poor, and tiny focuses are difficult to detect are solved.

The invention discloses an MMP-9-targeted MRI (Magnetic Resonance Imaging) nanoprobe and a preparation method and application thereof, the MMP-9-targeted MRI nanoprobe is represented by Gd-ACC-MAP and comprises amorphous calcium carbonate and an aptamer covalently connected to the surface of the amorphous calcium carbonate, the calcium carbonate is doped with gadolinium, and the aptamer has a nucleotide sequence as shown in SEQ ID NO: 1. The MRI nanoprobe can be used for early diagnosis of aneurysm and evaluation of rupture risk of the aneurysm.

In a first aspect, the present invention is directed to a magnetic particle having a saturation magnetization ≥ 15 Am2 / kg and having at least one azide group –N=N'-N- bonded to a polymer matrix of the magnetic particle. A second aspect of the invention relates to a process for preparing a magnetic particle, which comprises at least one magnetic core (M), a polymer matrix (P) comprising a crosslinked polymer at least partially surrounding the magnetic core (M), the polymer matrix (P) comprising on its surface at least a functional group reactive towards amine groups and / or hydroxyl groups. In a third aspect, the invention is directed to the magnetic particle obtained or obtainable from the process of the second aspect. A fourth aspect is related to a process for preparing a magnetic particle having a saturation magnetization ≥ 15 Am2 / kg of the first aspect, and a fifth aspect relates to the magnetic particle obtained or obtainable from the process of the fourth aspect. A sixth aspect is directed to the use of the magnetic particle having a saturation magnetization ≥ 15 Am2 / kg of the first aspect or of the fourth aspect for qualitative and / or quantitative determination of at least one analyte in a fluid or in a gas, and a seventh aspect relates to a method for determining at least one analyte in a fluid using said magnetic particle having a saturation magnetization ≥ 15 Am2 / kg.

An anisotropic electroconductive film and an electroconductive connector that make it possible to achieve lower resistance than the prior art, improved highfrequency characteristics and higher resolution, improved contact stability due to reduced contact pressure, increased electrical current capacity, and improved durability are provided. An anisotropic electroconductive film 110 includes an electrically insulative thin film 112 made of an elastic polymer material, and particles 200 made of a substance exhibiting topological antiferromagnetic properties, which are dispersed in the electrically insulative thin film 112 and which are given magnetic anisotropy so that an easy direction of magnetization is in a thickness direction of the electrically insulative thin film 112. The particles 200 form conduction portions 114 which are arranged at intervals in an in-plane direction of the electrically insulative thin film 100 for enabling electrical conduction along the thickness direction thereof. Each conduction portion 114 is formed by the single particle 200 (or the particles 200 aligned in the thickness direction). Each particle 200 has a south pole region 604 and a north pole region 602 formed respectively at two ends thereof along the easy direction of magnetization, and the south pole region and the north pole region are subject to concentration of magnetic flux of virtual magnetic fields.

The invention provides an iron-based nano material, a preparation method and application, the material comprises magnetic iron oxide nano particles and a functional modification layer on the surface, the magnetic iron oxide nano particles are Fe3O4, the particle size is 10-30 nm, and the magnetic iron oxide nano particles have specific oxygen vacancy concentration, 337 nm laser absorptivity and saturation magnetization; the functional modification layer is an amino-containing polymer layer, such as a polydopamine or cysteine-polyethyleneimine copolymer, and can reduce salt ion interference. The material solves the problems of low molecular weight region background interference, non-uniform crystallization, low ionization efficiency, poor salt tolerance and the like during detection of 100-400Da small molecular metabolites in trace samples such as tears and the like by optimizing magnetic responsiveness, photo-thermal conversion capability and salt resistance of an existing matrix; the method realizes high sensitivity and high repeatability (detection), and is suitable for metabonomics analysis of trace biological samples.

Provided are: a nanocrystal alloy soft magnetic powder which optimizes the particle shape and particle size distribution and exhibits good filling properties and magnetic properties; a dust core which contains the powder and has high magnetic permeability and low iron loss; a magnetic element; and an electronic device. The nanocrystal alloy soft magnetic powder is represented by the composition formula FeaCubNbc (Si1-x (B1-yCry) x) 100-a-b-c-dSd [a, b, c, d, x, and y satisfy 75.5 < = a < = 79.5, 0.3 < = b < = 2.0, 2.0 < = c < = 4.0, 0.001 < = d < = 0.080, 0.55 < = x < = 0.91, and 0 < = y < = 0.185, expressed in atomic ratio. [1, 2, 3], and an impurity composition, and contains crystal grains of 1.0 nm to 30.0 nm, a particle size D10 of 7.0 [mu] m to 15.0 [mu] m, and a particle size D50 of 22.0 [mu] m to 32.0 [mu] m.

To reliably electrically connect the lead layer and protective film that covers a functional film even when the film thickness of the protective film is very small. After formation of a conductive protective film 51 on the surface of a functional film 20, reverse sputtering is performed with a part of the surface of the protective film 51 covered with a mask 60 to physically reduce a native oxide film 52 formed on a part of the surface of the protective film 51 that is not covered with the mask 60. Thereafter, a lead layer 40 is formed on a part of the surface of the protective film 51 that is not covered with the mask 60. This can remove the native oxide film 52 formed on the protective film 51 without requiring etching. Thus, even when the film thickness of the protective film 51 is very thin, it is possible to electrically connect the lead layer 40 and protective film 51 without damaging the functional film 20.

The application discloses a kind of magnetically sensitive β-CD-OTf@Au@R-Fe3O4 Nanomotor and its preparation method and application, including the following steps: respectively preparing Zn (OTf) 2 solution and supersaturated β-CD solution, based on host-guest interaction, after mixing, β-CD-OTf is obtained;R-Fe3O4 is in situ assembled on Au NPs by electrostatic force, and R-Fe3O4@Au is obtained;Au@R-Fe3O4 is coupled to β-CD-OTf by electrostatic force, and magnetically sensitive β-CD-OTf@Au@R-Fe3O4 Nanomotor is obtained.The preparation method is simple, and the obtained nanomotor can not only significantly improve selective adsorption capacity to cationic dye, but also has high SERS activity, can realize self-cleaning after SERS detection, has excellent self-cleaning performance and recycling performance, and is suitable for being applied in cyclic selective capture and high-sensitivity SERS detection of cationic dye.

The invention discloses application of iron oxide nanoparticles in target treatment of schistosome eggs, and relates to the cross technical field of nano material target delivery and disease prevention and control. On the basis of paramagnetism, a microtubule structure and surface electrical characteristics of schistosoma japonicum egg shells, electrically neutral Fe3O4 magnetic nanoparticles with the particle size of 8-15 nm or electropositive Fe3O4-NH2 magnetic nanoparticles with the surface modified by amino groups are innovatively adopted, efficient egg penetration is achieved through magnetic targeted enrichment and physical-static synergistic effect, and in-vivo and in-vitro experiments prove that the effect of effectively penetrating through the eggs is achieved. The Fe3O4 and Fe3O4-NH2 nanoparticles have obvious worm egg targeting capability, and the penetrating efficiency of the Fe3O4 and Fe3O4-NH2 nanoparticles on worm eggs exceeds 38%, so that an important experimental basis is provided for subsequent development of a nano-drug delivery system for preventing and treating schistosomiasis.

To provide a method for producing a new ferrite quantum dot different from a conventional one.SOLUTION: A method for producing ferrite quantum dots, the method comprising the steps of preparing a mixed solution in which at least ferrous hydroxide is present in water at 0 °C or higher and 30 °C or lower, preparing a green rust-containing suspension by oxidizing the mixed solution to form green rust crystals in the mixed solution, synthesizing ferrite quantum dots in the suspension by raising the temperature of the suspension to 50 °C or higher and 100 °C or lower in an oxygen-free stream, and collecting the ferrite quantum dots in the suspension.SELECTED DRAWING: None

To provide a magnetoresistance effect element with a large MR ratio.SOLUTION: A magnetoresistance effect element comprises a first ferromagnetic layer, a second ferromagnetic layer, and a non-magnetic layer. The first ferromagnetic layer includes a first layer and a second layer. The first layer is arranged closer to the non-magnetic layer than the second layer. The first layer contains a heusler alloy which is at least partially crystallized. The second layer includes a ferromagnetic body which is at least partially crystallized, unlike the heusler alloy. The first layer and the second layer include a first atom added. The first atom is one selected from the group consisting of Mg, Al, Cr, Mn, Ni, Cu, Zn, Pd, Cd, In, Sn, Sb, Pt, Au, and Bi.SELECTED DRAWING: Figure 1

The invention relates to an iron-based amorphous nanocrystalline alloy and a preparation method and application thereof. The composition of the iron-based amorphous nanocrystalline alloy is shown as the following chemical formula: FeaNibCrcModCoeCfCugMh, M is a halogen element and is selected from one of F, Cl, Br and I, and M is a halogen element selected from one of F, Cl, Br and I. The invention further discloses a preparation method of the iron-based amorphous nanocrystalline alloy. A, b, c, d, e, f, g and h are atomic percent contents of the corresponding components respectively: 78 < = a < = 85, 1.73 < = b < = 6.6, 1.75 < = c < = 6.2, 1.81 < = d < = 5.9, 0.8 < = e < = 6.3, 0.8 < = f < = 1.4, 0.6 < = g < = 1.1, 0.1 < = h < = 0.5, and a + b + c + d + e + f + g + h = 100. The alloy disclosed by the invention has better soft magnetic performance and stability; according to the preparation method, annealing is carried out in a contact heating mode, emission of harmful gas is reduced, and the environment-friendly requirement is met.

The invention relates to a Fe-based nanocrystalline alloy material and a preparation method and application thereof, and belongs to the technical field of nanocrystalline alloy materials. The invention provides a Fe-based nanocrystalline alloy material, the atomic percentage expression of the Fe-based nanocrystalline alloy material is FexGdyBz, x is the atomic content corresponding to the Fe element, and x is greater than or equal to 82 and less than or equal to 87; y is the atom content corresponding to the Gd element, and 0.5 < = y < = 3; z is the atom content corresponding to the element B, and z is greater than or equal to 12 and less than or equal to 16; x + y + z is equal to 100. After the Gd element is added, the coercive force of the Fe-based nanocrystalline alloy material can be further reduced, the saturation magnetization of the Fe-based nanocrystalline alloy material is improved, and the Fe-based nanocrystalline alloy material with excellent soft magnetic performance and high iron content is obtained. It is found that the contents of Fe, Gd and B elements have a certain relation, and under the specific contents, the soft magnetic performance of the Fe-based nanocrystalline alloy material can be improved.

The invention provides a FeCo hard magnetic nanowire preparation method, which comprises: mixing an iron source, a cobalt source, a reducing agent and a solvent, heating to a temperature of 70-75 DEG C in an argon atmosphere, carrying out ultrasonic treatment for 12-17 min, dehydrating at a temperature of 110-120 DEG C, adding a surfactant, continuously heating to a reaction temperature, carrying out heat preservation, and applying a static micro-magnetic field during the heat preservation to obtain a reaction product; and purifying the reaction product to obtain the FeCo hard magnetic nanowire. The invention provides a magnetic field-surfactant synergistically assisted wet chemical method, which is used for synthesizing bct-FeCo nanowires. According to the method, the single-phase hard magnetic bct-FeCo ordered nanometer one-dimensional structure is successfully prepared by synergistically utilizing crystal lattice stress induced by a surfactant ligand and a magnetic field orientation effect. The FeCo hard magnetic nanowire has relatively high coercive force.

This invention provides an Fe-based nanocrystalline alloy thin strip that can effectively reduce iron loss, a wound iron core using the same, and a method for manufacturing them. [Solution] The Fe-based nanocrystalline alloy thin strip has an uneven surface structure including at least one recess 1 with a depth of 3 μm or more that extends along the longitudinal direction L of the thin strip, or an uneven surface structure in which the maximum height roughness Rz in the width direction W of the thin strip is 3 μm or more, and magnetic domains are formed along the width direction W. Alternatively, the wound iron core is composed of a thin strip of Fe-based nanocrystalline alloy, and the width of the region in which the thin strip is continuous along the height direction of the wound iron core is 2.5 mm or less, and magnetic domains are formed along the height direction of the wound iron core.

Nanoparticulate material suitable for administration to a subject, the nanoparticulate material having bound to its surface: (a) copolymeric steric stabiliser that promotes dispersion of the nanoparticulate material in a liquid, wherein the copolymeric steric stabiliser comprises (i) an anchoring polymer segment having one or more binding groups that bind the copolymeric steric stabiliser to the nanoparticulate material, and (ii) a steric stabilising polymer segment that is different from the anchoring polymer segment, and (b) copolymeric mapping moiety comprising (i) an anchoring polymer segment having one or more binding groups that bind the copolymeric mapping moiety to the nanoparticulate material, (ii) one or more mapping groups comprising an agent that specifically binds to fibroblast activation protein (FAP), and (iii) a coupling polymer segment that is different to the anchoring polymer segment, wherein the coupling polymer segment couples the anchoring polymer segment to the one or more mapping groups.

The application discloses a preparation strategy of a single-layer magnetic cage lattice film material, and belongs to the technical field of nanometer materials.The application comprises the following steps: in an ultrahigh vacuum environment, Nb and Te are evaporated and deposited onto a substrate according to a certain deposition beam flow ratio by using a molecular beam epitaxy process, chemical bonding between the Nb and Te is realized through annealing treatment, and a single-layer magnetic cage lattice NbTe2 film material is obtained.The application realizes the preparation of the single-layer cage lattice NbTe2, and the single-layer cage lattice NbTe2 is subjected to atomic structure and magnetic characterization by means of a characterization system, so that the application has excellent scientific research value and wide application potential, and provides a new platform for in-depth scientific research and exploration of novel quantum physical properties.