55 results about "Facilitated diffusion" patented technology

Semiconductor device fabrication methods are provided which include: providing a structure with at least one region and including a dielectric layer disposed over a substrate; forming a multilayer stack structure including a threshold-voltage adjusting layer over the dielectric layer, the multilayer stack structure including a first threshold-voltage adjusting layer in a first region of the at least one region, and a second threshold-voltage adjusting layer in a second region of the at least one region; and annealing the structure to define a varying threshold voltage of the at least one region, the annealing facilitating diffusion of at least one threshold voltage adjusting species from the first threshold-voltage adjusting layer and the second threshold-voltage adjusting layer into the dielectric layer, where a threshold voltage of the first region is independent of the threshold voltage of the second region.

An apparatus for sensing an analyte is described, wherein the apparatus includes an interface contact element that is used to establish an interface with a quantity of body fluid. The interface contact element is adapted to facilitate diffusion of a target analyte across the interface essentially free of net mass fluid transport. The quantity of body fluid is exposed to the interface contact element through micro-pathways. The apparatus can also include a sensing material adapted to sense the target analyte with at least one analytical method. Methods for using the apparatus in a non- or minimally invasive monitoring technique are also described. FIG. (1) illustrates a non-limiting embodiment of the apparatus used to test the principles of the invention.

A seating construction with a plurality of plenums into which is received temperature conditioned air. The air passes through the seat via a plurality of channels formed in the foam of the seat cushion. The air then migrates through a reticulated foam layer that is itself covered with an air permeable layer of material. The reticulated foam and stitching of the seat fabric facilitate diffusion of the air from the foam channel conduits. The air then convectively circulates against and near the occupant of the seat to facilitate climate control around the occupant.

A method for fabricating a micro-organ device comprises providing a microscale support having one or more microfluidic channels and one or more micro-chambers for housing a micro-organ and printing a micro-organ on the microscale support using a cell suspension in a syringe controlled by a computer-aided tissue engineering system, wherein the cell suspension comprises cells suspended in a solution containing a material that functions as a three-dimensional scaffold. The printing is performed with the computer-aided tissue engineering system according to a particular pattern. The micro-organ device comprises at least one micro-chamber each housing a micro-organ; and at least one microfluidic channel connected to the micro-chamber, wherein the micro-organ comprises cells arranged in a configuration that includes microscale spacing between portions of the cells to facilitate diffusion exchange between the cells and a medium supplied from the at least one microfluidic channel.

Methods of increasing the permeability of corneal epithelium to facilitate the diffusion of agents into the collagen fibrillar network of the stroma are provided. Used in combination, these methods open the epithelium to facilitate diffusion of stabilization molecules into the stroma and dissociate bridging molecules from stromal collagen fibers, thereby priming the collagen fibrillar network for restabilization by stabilization molecules. These methods can be used to increase the effectiveness and longevity of non-invasive corneal reshaping, such as orthokeratology, for correcting myopia, hyperopia and astigmatism.

The invention discloses a preparation method of an aluminum-copper bimetal composite material. The preparation method comprises the following steps of: first carrying out pre-treatment on an aluminium block and a copper block respectively, and then placing a tungsten fibre web deposited with nickel on the surface between aluminum and copper; and placing aluminum, the tungsten fibre web and copper in a hot-pressing grinding tool and carrying out hot-pressing micro-area diffusion forming to obtain the aluminum-copper bimetal composite material. According to the preparation method of the aluminum-copper bimetal composite material, which is disclosed by the invention, Ni of a proper thickness is physically deposited on a tungsten fibre surface, thereby facilitating diffusion of Ni towards the two sides of aluminum and copper; the pure aluminum melted on the surface under a high-temperature condition is guaranteed to form a micron-scale interface bonding structure with a solid-state copper alloy through tungsten fibre micro-area diffusion by virtue of the difference between aluminum and copper in melting point, and thus metallurgical bonding between aluminum and copper is realized. In addition to the respective excellent performance of aluminum and copper, the formed bimetal composite material has high interface strength, and the interface shear strength of the bimetal composite material can reach more than 100MPa.

An fluid connector apparatus having an exhalation insert that provides an improved exhalation feature whereby ex -haled breathing gas flows out of the fluid connector apparatus in the form of elongated blades of gas. The elongated blades of gas enable improved fluid flow when compared with conventional circular jets of gas and advantageously also entrain atmospheric gases adjacent the gas blades to facilitate diffusion and dissipation of the gas blades. The fluid connector apparatus includes one or more elongated flow channels formed between the exhalation insert and the fluid connector. The exhaust gas flows through the flow channels, and the flow channels cause the discharged gas to be output in the form of the elongated blades of gas. The exhalation feature enables the outputting of exhaled breathing gas in greater volumes, at reduced velocities, and with reduced acoustic signature.

The invention discloses a mesoporous silica nanosphere, a preparation method thereof, and an application of the nanosphere in drug load. The preparation method comprises the following steps: adding asilicon source solution composed of a silicone source and a diluent to a mixed aqueous solution containing a surfactant, a catalyst and a diluent, stirring and reacting the obtained solution, filtering the obtained solution, washing the obtained reaction product, and calcining the washed reaction product. The prepared sample has a particle size of 40-200 nm, a specific surface area of 1050-1350m<2>/g and a pore size of 1.8-2.4 nm; and the product is applied to the loading of hydrophobic drugs to achieve nanocrystallization of the drugs and enhance the water solubility and the dissolution rate. The method provided by the invention has the advantages of avoiding of the use of an organic template for traditional mesoporous silica nanospheres, easily available raw materials, simple device and high efficiency; and introduction of pore wall particles to the mesoporous structure facilitates diffusion and load of drugs, reduces rerystallization, and makes the in vitro dissolution rate be almost 100%, so the drugs have significantly higher bioavailability than commercial drugs, and have great actual significance.

The invention discloses a polluted soil and underground water in-situ reaction zone repairing system which comprises a direct-current power supply, an even number of electrode wells, an even number of electrodes and an extraction and treatment system, wherein the electrode wells are arranged in the downstream direction of the underground water flow direction of a pollution source; the bottoms of the electrode wells are positioned on a soil aquifer; electrolyte is formed through permeation of underground water into the electrode wells in the electrode wells; the number of the electrodes is equal to that of the electrode wells; an electrode is inserted in each electrode well; the electrodes are inserted in the bottoms of the electrode wells; the height of each electrode is equal to or greater than the height of the liquid surface of the electrolyte in the corresponding electrode well; half of the electrodes are connected with the anode of the direct-current power supply, and the other half of the electrodes are connected with the cathode of the direct-current power supply; and a pipeline provided with a filter is adopted to extract the electrolyte of each electrode well. The polluted soil and underground water in-situ reaction zone repairing system facilitates interception and concentration of pollutants in underground water and facilitates diffusion and migration of nutrient substances.

The invention provides a light-emitting diode of a vertical structure and a manufacturing method thereof. An N-GaN layer, a quantum well layer, a P-GaN layer and a first transparent conductive layer are sequentially formed on a semi-conductor substrate, a plurality of pore channels are etched, an insulating sidewall is prepared, meanwhile, an insulating layer is prepared on the first transparent conductive layer, the pore channels are filled with electrode materials so as to form Ohmic contact with the N-GaN layer, meanwhile, an electrode material layer is formed on the insulating layer, then the electrode material layer and a conductive supporting substrate are bonded, the conductive supporting substrate is the N electrode portion of a chip, the semi-conductor substrate is peeled off, etching is carried out from the N-GaN layer to the first transparent conductive layer, and ultimately a P electrode is prepared and preparation is finished. An electrode at the side different from the vertical structure side is manufactured on the same side of the chip, and the process is simplified. The point-shaped electrodes facilitate diffusion of currents of the chip under large currents so that density distribution of the currents is uniform, the light-emitting efficiency of the light-emitting diode is effectively improved, and service life of the light-emitting diode is prolonged.

The invention discloses a badge type passive air sampler using MCM-41 molecular sieve as an adsorbent and provides a simple method for sampling volatile organic compounds in air. The method employs pure-silicon MCM-41 molecular sieve as an adsorbent to adsorb and sample various volatile organic compounds in air; the sampler is composed of a protective shell, a fixing shell, a front-end filter membrane, an adsorbent cage and a fixture for wearing; the adsorbent cage with the molecular sieve loaded therein is composed of a metal thin mesh and a covering filter membrane, and the adsorbent cage can be conveniently taken out for desorption or regeneration; the MCM-41 molecular sieve acting as an adsorbent is simple to regenerate, adjustable in pore diameter and harmless to human bodies, and has mesoporous channels facilitating diffusion of pollutant molecules; the sampler is power-free, portable, simple in structure, simple to operate, high in regeneration rate and low in cost, and is suitable for monitoring air in a work environment or living environment and evaluating the amount of organic pollutants in contact with personnel.

The invention discloses a solder for soldering a different-component W-Cu alloy, a preparing method and a soldering method thereof. The mass percents of the components of the solder are described as follows: 10.0-16.0% of Mn, 0.5-3.5% of Co, 1.0-5.0% of Ni, 1.0-4.0% of Ti, 0.2-0.6% of Si, 0.1-.03% of B, and the balance of Cu. The soldering temperature of the copper-based solder is 1000-1050 DEG C. Moderate fusing temperature of the solder and high fusion uniformity of the solder are realized. Through adding related beneficial elements, good wetability and high metallurgical miscibility of the solder to the W-Cu alloy are realized. An obtained solder joint has high strength and high corrosion resistance and can be totally applied in a complicated environment. The solder is an economical solder with high comprehensive performance. A prepared copper-based solder foil has functions of facilitating diffusion and interface reaction between alloy elements in a soldering connecting process, improving wetting and spreading capabilities of the solder on the surface of the W-Cu alloy, and facilitating forming of a compact solder joint.

The invention provides a preparation method of graphene. A graphene oxide emulsion is obtained by mixing graphene oxide and an oil phase, and self-assembly of graphene oxide sheet layers on an emulsion interface is realized; besides, a hollow and porous graphene ball structure is prepared with a hydrothermal method by means of the characteristic that citric acid can generate gas after being hydrolyzed at high temperature, the structure facilitates diffusion and transmission of electrolyte ions, a ball-shaped structure serves as a conductive network, and agglomeration and stacking of the graphene sheet layers are inhibited; an inner-crosslinking ball-shaped structure is established to serve as the conductive network, transmission of electrons is facilitated, interface resistance is effectively reduced, the specific capacity and the multiplying power of a supercapacitor are increased, and the cycle performance of the supercapacitor is improved. The graphene is simple in structure, has a high specific surface area and high conductivity and can be applied to the supercapacitor. The preparation method is simple in process, the reaction process is easy to control, a little equipment investment is required, the graphene does not need to be prepared under a vacuum high-pressure condition, and large-scale production can be realized.

The invention relates to the technical field of environmental protection equipment, in particular to a processing mechanism for preliminary secondary machining of waste PVC (polyvinyl chloride) plastic water pipes. A technical problem to be solved by the invention is that PVC plastic is not convenient for discharging, briquetting and packing. In order to solve the technical problem, the inventionprovides a processing mechanism for preliminary secondary machining of waste PVC plastic water pipes, which comprises a box, wherein a feeding pipe is plugged inside the opening of the top of the box,a preliminary strip cutting mechanism is fixedly connected to one side of the inside wall of the box, a granulating mechanism is arranged on the bottom of the inside wall of the box, the output end of the granulating mechanism is in driving connection with the output end of the preliminary strip cutting mechanism, and a material spreading mechanism is in bell and spigot joint with the granulatingmechanism. In case of rotation, a lower granulating bulge on the granulating mechanism disclosed by the invention rotates, with use of an upper granulating bulge, segmented plastic strips can be granulated, and a dispersion cone block arranged on the top of a rotary table can facilitate diffusion of falling plastic strips to four sides, so as to facilitate discharging and enable the plastic to enter granulating step smoothly.

The invention provides a low-temperature extreme pressure lubricating grease composition. The low-temperature extreme pressure lubricating grease composition has appropriate penetration to ensure effective lubrication of equipment and reduction lubricating grease attenuation and loss, has a small low-temperature torque and low similar viscosity to ensure the liquidity of the lubricating grease at the low temperature of -40 DEG C and facilitate diffusion or carrying to lubricating points, has excellent extreme pressure abrasion resistance and good water resistance to effectively prevent poor lubrication caused by water inflow to a system when being used outdoors and has good corrosion resistance and rust protection to effectively prevent equipment corrosion and rust in the using process.

The invention belongs to the field of die surface strengthening treatment. Through the TD method treatment, a vanadium carbide (VC) coating of microns or scores of microns thick can be formed on the surface of a die; the coating is uniform in thickness and compact, and has properties of high hardness, good abrasive resistance, seizure resistance and the like; and the service life of the die can be efficiently improved. Meanwhile, the binding property of the coating and a base body can directly affect the use effect of the coating and the service life of the die. Compared with the conventional TD method salt bath diffusion agent, the novel diffusion agent with rare-earth Nd can facilitate diffusion of surface elements, improve the binding force of the coating surface, and form an obvious diffusion layer between the coating and the base body. As the hardness of the diffusion layer is higher than that of the base body, the diffusion layer can play better support role for the VC coating, the probability that the coating is stripped and broken during the service process is greatly lowered, and the purposes of improving the working quality of the die and prolonging the service life can be realized.

The invention relates to the field of a lithium-ion battery and specifically relates to a separator for a non-aqueous secondary battery. The separator for the non-aqueous secondary battery provided by the invention comprises a separator base material and a coating attached on the surface of the base material. The surface layer of the coating comprises an adhering area and an electrolyte diffusion area. According to the separator for the non-aqueous secondary battery provided by the invention, the adhering strength of the separator and an electrode can be improved, moreover, after a battery technology production process is carried out, and a pore structure can stilled be kept, thereby facilitating diffusion and conduction of electrolyte and reducing polarization impedance.

The invention discloses metal ion-doped flower-like MnO2 nanosheets for a supercapacitor and a preparation method of the metal ion-doped flower-like MnO2 nanosheets. By a chemical precipitation method, preparation of nanosheet-self-assembled flower-like MnO2 is guided by doping metal ions, and the sheet thickness of the nanosheet-self-assembled flower-like MnO2 is 3-5nm; the preparation method comprises the following steps: putting a mixed aqueous solution of manganese sulfate and ammonium persulfate in a concentration ratio of 1: 1 into an ultrasonic constant-temperature water bath environment, dropwise adding a metal salt solution with the concentration of 0.001-0.2mol/L into the mixed solution at a uniform speed, and then continuing reacting for 0.5-3h. The preparation method is simple in preparation process and low in cost; a flower-like structure obtained by self-assembling nanosheets significantly increase the specific surface area of an electrode material and facilitates diffusion of electrolyte ions in the bulk phase of the electrode material, so that the flower-like structure has excellent electrochemical properties. When the scanning rate is 50mV/s, the measured specific capacitance can reach 303.6F/g and the measured impedance is 4.2 omega.

According to an dopant-injection method for injecting volatilized dopant gas into semiconductor melt in a crucible (31), the crucible (31) is rotated alternately clockwise and counterclockwise around a support shaft (36) extending in a flowing direction of the dopant gas, so that the dopant gas is blown against the semiconductor melt white the crucible is rotated. Rotating the crucible (31) causes convection currents in the semiconductor melt therein, thereby facilitating diffusion of the blown dopant in the semiconductor melt.

This invention relates to the production of succinic acid and other chemicals derived from phosphoenolpyruvate (PEP) by fermentation with a microorganism in which the fermentation medium contains one or more sugars, and in which one or more of the sugars is imported into the cell by facilitated diffusion. As a specific example, succinic acid is produced from a glucose-containing renewable feedstock through fermentation using a biocatalyst. Examples of such a biocatalyst include microorganisms that have been enhanced in their ability to utilize glucose as a carbon and energy source. The biocatalysts of the present invention are derived from the genetic manipulation of parental strains that were originally constructed with the goal to produce one or more chemicals (for example succinic acid and/or a salt of succinic acid) at a commercial scale using feedstocks that include, for example, glucose, fructose, or sucrose. The genetic manipulations of the present invention involve the introduction of exogenous genes involved in the transport and metabolism of glucose or fructose into the parental strains. The genes involved in the transport and metabolism of glucose or fructose can also be introduced into a microorganism prior to developing the organism to produce a particular chemical. The genes involved in the transport and metabolism of sucrose can also be used to augment or improve the efficiency of sugar transport and metabolism by strains already known to have some ability for glucose utilization in biological fermentations.

The invention discloses an oxalate nanosheet array thin-film electrode comprising a conductive substrate and an oxalate nanosheet array thin-film attached to the conductive substrate, and further discloses a preparation method of the oxalate nanosheet array thin-film electrode. The oxalate nanosheet array thin-film electrode is characterized in that nickel oxalate or cobalt oxalate serves as an active material, and preparation of the active material and combination of the active material and the conductive substrate are completed synchronously; assembly steps of a traditional powder electrodematerial is simplified, and the preparation process is simple and convenient; and the obtained oxalate nanosheet array thin-film is highly ordered and has the characteristic of oriented growth perpendicular to the surface of the conductive substrate, and formed porous channels and ordered physical structures facilitate diffusion and migration of an electrolyte and electrons. The oxalate nanosheetarray thin-film electrode is high in electrochemical activity, and therefore can be directly used as an electrode material of supercapacitors or a catalytic material for electrolysis of water.

The invention discloses an impregnation auxiliary for powder zinc impregnation. The impregnation auxiliary for powder zinc impregnation belongs to a power mixture which mainly comprises, by weight, 10-25% of aluminum oxide serving as a high-temperature-resistant adhesive for zinc powder, 30-60% of ammonia chloride serving as a furnace interior oxygen scavenger, 15-25% of zinc chloride serving as an activating agent for workpieces to be impregnated, 5-18% of lanthanum hydroxide serving as an impregnation assisting catalyst and 10-16%fo sodium silicoaluminate serving as a moistureproof anti-caking agent of the impregnation auxiliary. The impregnation auxiliary provided by the invention can remove moisture and unnecessary oxygen in a furnace pipe and reduce zinc powder oxidation, can activatethe surfaces of workpieces to enable metal activated matrixes of the workpieces to be exposed and facilitate diffusion of zinc atoms in iron matrixes and meanwhile has the catalytic effect.