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904 results about "Active particles" patented technology

Surface-enhanced spectroscopy-active sandwich nanoparticles

Surface-enhanced Raman spectroscopy (SERS) uses nanoscale metal particles (SERS-active particles) or surface roughness to enhance the Raman signal of Raman-active analytes contacting the surface. SERS sandwich particles contain SERS-active particles sandwiching a Raman-active substance and serve as optical tags. Preferably, the particles are rod-shaped, with each layer (SERS-active and Raman-active) formed as a distinct stripe of the particle. These freestanding particles can be derivatized with surface ligands capable of associating with analytes of interest in, for example, a biological sample. The acquired Raman spectrum of the particle encodes the identity of the ligand. Because of the simplicity and intensity of Raman spectra, highly multiplexed assays are capable using SERS particles with different Raman-active species.
Owner:BECTON DICKINSON & CO +1

Electrodes comprising mixed active particles

Electrode active materials comprising two or more groups of particles having differing chemical compositions, wherein each group of particles comprises a material selected from:(a) materials of the formula A1aM1b(XY4)cZd; and(b) materials of the formula A2eM2fOg; andwherein(i) A1, A2, and A3 are Li, Na, or K;(ii) M1 and M3 comprise a transition metal;(iv) XY4 a phosphate or similar moiety; and(v) Z is OH, or halogen.In a preferred embodiment, A2eM3fOg is A3hMniO4 having an inner and an outer region, wherein the inner region comprises a cubic spinel manganese oxide, and the outer region comprises a manganese oxide enriched in Mn+4 relative to the inner region. In a preferred embodiment, the compositions also comprise a basic compound.
Owner:LITHIUM WERKS TECH BV +1

Preparation method of improved room temperature electron ion fast transfer electrode slice for solid-state secondary lithium battery

The invention discloses a preparation method of an improved room temperature electron ion fast transfer electrode slicefor a solid-state secondary lithium battery. The method comprises the following steps: (1) evenly mixing an active material, a conductive agent and a fast ion conductor according to a certain proportion; (2) adding a certain amount of a binder into the mixture, and mixing uniformly to obtain a uniform slurry; and (3) preparing the slurry into slices, and drying to obtain the required electrode slice. The preparation method of the electrode slice preparation uses the fast ion conductor material with high temperature high lithium ion conductivity; the material can play the role of increasing the contact area between the active particles and solid electrolyte, and he form a three-dimensional electron and lithium ion transport network, so as to ensure the rapid conduction of the electrons in the electrode also improve the transmission rate of lithium ions between the active particles and electrolyte. Therefore, the preparation method is beneficial to reducing the interface impedance among the active particles in the electrode slice and between the active particles and the solid electrolyte, thereby increasing the power rate performance of the solid-state secondary lithium battery.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Substrate with surface-enhanced Raman scattering activity and preparation method thereof

The invention provides a substrate with surface-enhanced Raman scattering activity and a preparation method thereof, and the method comprises the following steps: the glass base surface is subjected to hydroxylation and amination treatment; catalytic hydrolysis is carried out on ethyl orthosilicate under the alkali condition by taking alcohol as a solvent; Silica microspheres with even size and smooth surface are prepared by an oscillation method; silane coupling agent of which the tail end is provided with amino is assembled on the surface of the silica microspheres; silver sol obtained by reducing sodium borohydride to silver nitrate through oscillation is assembled on the surface of SiO2-NH2NPs, and is diffused in water again after centrifugal separation and washing by distillated water; self assembly is carried out on the silver sol after being placed in SiO2@Ag NPs dispersion for 6-12h; the SERS active substrate is obtained after taking out from water and drying. In the SERS active substrate of the invention, the active particles and the substrate are combined firmly, thus being applicable to detecting unimolecular Raman signals in aqueous solution; the substrate can be used for SERS detection repeatedly, thus improving repeated utilization ratio of the substrate.
Owner:NORTHWEST NORMAL UNIVERSITY

Fluid controllable laser endodontic cleaning and disinfecting system

An endodontic probe is used to perform disinfection procedures on target tissues within root canal passages and tubules. The endodontic probe can include an electromagnetic radiation emitting fiber optic tip having a distal end and a radiation emitting region disposed proximally of the distal end. According to one aspect, the endodontic probe can include a porous structure that encompasses a region of the fiber optic tip excluding the radiation emitting region and that is loaded with biologically-active particles, cleaning particles, biologically-active agents, or cleaning agents for delivery from the porous structure onto the target tissues. Another aspect can include provision of the endodontic probe with an adjustable channel-depth indicator, which encompasses a region of the fiber optic tip besides the radiation emitting region and which is movable in proximal and distal directions along a surface of the fiber optic tip to facilitate the provision of depth-of-insertion information to users of the endodontic probe.
Owner:BIOLASE TECH INC

Silicon-carbon composite material, preparation method thereof and lithium ion battery employing same

ActiveCN102694155APossesses electrochemical reversible intercalation and delithiation performanceAlleviate chalking and sheddingMaterial nanotechnologyCell electrodesCarbon compositesSilicon monoxide
The invention discloses a silicon-carbon composite material, a preparation method thereof and a lithium ion battery prepared by adopting the material. The preparation method of the silicon-carbon composite material comprises the following steps: (1) mixing a composite material (silica-coated nano-silicon) manufactured by silicon monoxide, a porous carbon-based material and excessive hydrofluoric acid solution to obtain another composite material in which nano-silicon particles are compounded in pores of the porous carbon-based material; and (2) heating a composite material in which nano-silicon particles are compounded in pores of a high polymer-coated porous carbon-based material under an inert atmosphere to obtain the silicon-carbon composite material coated by porous carbon spheres. The process raw materials are accessible and simple to prepare. The silicon-carbon composite material has electrochemical reversible embedded lithium removal performance, greatly relieves efflorescence and falling-off phenomena of active particles in the charge-discharge process and has the high lithium storage capacity characteristic of silicon materials and the high cycling stability of carbon materials, and a battery prepared by the silicon-carbon composite material has better cyclicity.
Owner:CHERY AUTOMOBILE CO LTD

Dielectric barrier discharge water treatment device and method

The invention provides a dielectric barrier discharge water treatment device and method, belonging to the technical field of a water treatment device and method. The device comprises a high-voltage high-frequency pulse power supply, a reactor shell, a column high-voltage electrode, a cylindrical submerged low-voltage electrode, a vermiculite-supported titanium dioxide catalyst, a dielectric barrier layer and a microporous aeration membrane. The method comprises the following steps: adding a solution to be treated, and applying a high-voltage pulse voltage between the column high-voltage electrode and the cylindrical submerged low-voltage electrode, wherein the peak voltage is 1-100kV, and the frequency is 1-50KHz; and adjusting the inlet air quantity, and regulating the contact time between treated wastewater and active particles inside the reactor. An aerator is introduced into the water treatment device, and medium-activity substances generated by dielectric barrier plasma discharge can completely enter the solution to the treated through the aerator, so the water treatment device has the advantages of high mass-transfer efficiency and short required time; the method is stable in running and simple to operate, and can run under atmospheric pressure; and the equipment is easy to manage and has high practicality and economical efficiency.
Owner:TAIYUAN UNIV OF TECH

Annular discharge based transient state plasma igniter

The invention relates to an annular discharge based transient state plasma igniter. An insulation sleeve is located in an insulation protection sleeve, and one end of the insulation sleeve is located in a cathode. An anode conduction rod is located in the insulation sleeve, and one end of the anode conduction rod is arranged in a center hole of the cathode. One end of the insulation protection sleeve is arranged in a fixing base. The anode is located in the cathode. The transient state plasma igniter is provided with a mixed gas channel. According to the invention, high-energy nanosecond pulse is used to discharge electricity to form a local high temperature area, and a large quantity of active particles are activated to ignite combustible mixed gas in an extremely short period of time. The ignition area is large, and the mixed gas can be ignited by multiple points; the ignition time is extremely short, and the ignition delay time is shorter; the ignition energy can be well coupled with the gas mixture, macromolecule hydrocarbon fuel in the ignition area is ionized as active particles with low activation energy, so that the chemical reaction of the mixed gas is faster, the reaction time is shorter, and the ignition success rate is high.
Owner:AIR FORCE UNIV PLA

High-power high-capacity lithium ion battery and preparation method thereof

ActiveCN106469825AMeet the requirements of instantaneous high-power workMeet the requirements of large capacityFinal product manufactureElectrode carriers/collectorsInternal resistanceElectrical battery
The invention provides a high-power high-capacity lithium ion battery and a preparation method thereof. by changing the structure of electrodes and placement position of current collectors in existing lithium ion battery, an electrode material layer is arranged between two layers of current collectors to form an electrode, and positive and negative current collectors are respectively positioned at two sides of a diaphragm instead of being positioned inside the electrode material layer. According to the structure, the battery electrode layer is close to a reaction area for porous current collector, and there is always a low-internal-resistance area. Thus, the battery can meet requirement of instantaneous high-power operation. Meanwhile, thickness of the electrode layer can be greatly increased, and the requirement of a battery on large capacity can be met. Therefore, the contradiction that the increase of battery capacity leads to instantaneous power coastdown of a battery is effectively solved. As the porous current collector is arranged between the electrode layer and the diaphragm, direct contact between the electrode material layer and the diaphragm is avoided, the internal short-circuited risk caused by positive and negative active particles and a nano-conducting layer entering the diaphragm is reduced, and safety of the battery is raised.
Owner:BEIJING HAWAGA POWER STORAGE TECH
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