43349 results about "Nanotechnology" patented technology

The invention generally relates to biodegradable and / or bioresorbable fibrous articles and more particularly to products and methods having utility in medical applications.

A composition and method for releasing a bio-active agent or a drug within a biological environment in a controlled manner is disclosed. The composition is a dual phase polymeric agent-delivery composition comprising a continuous biocompatible gel phase, a discontinuous particulate phase comprising defined microparticles and an agent to be delivered. A microparticle containing a bio-active agent is releasably entrained within a biocompatible polymeric gel matrix. The bioactive agent release may be contained in the microparticle phase alone or in both the microparticles and the gel matrix. The release of the agent is prolonged over a period of time, and the delivery may be modulated and / or controlled. In addition, a second agent may be loaded in some of the microparticles and / or the gel matrix.

A silicon oxide film formation method enhances the efficiency of generating atomic oxygen and improves film quality of a silicon film (SiO2 film) in forming the silicon oxide film using an RS-CVD system. Nitrogen atom containing gas (N2 gas, NO gas, N2O gas, NO2 gas or the like) is added to oxygen atom containing gas (O2 gas, O3 gas or the like) introduced into a plasma generating space in a vacuum container to produce plasmas with these gases and to thereby increase the quantity of atomic oxygen generated by the plasmas in the plasma generating space.

In a film formation method of a semiconductor device including a plurality of silicon-based transistors or capacitors, there exist hydrogen at least in a part of the silicon surface in advance, and the film formation method removes the hydrogen by exposing the silicon surface to a first inert gas plasma. Thereafter a silicon compound layer is formed on the surface of the silicon gas by generating plasma while using a mixed gas of a second inert gas and one or more gaseous molecules, such that there is formed a silicon compound layer containing at least a pat of the elements constituting the gaseous molecules, on the surface of the silicon gas.

High tensile stress in a deposited layer such as silicon nitride, may be achieved utilizing one or more techniques, employed alone or in combination. High tensile stress may be achieved by forming a silicon-containing layer on a surface by exposing the surface to a silicon-containing precursor gas in the absence of a plasma, forming silicon nitride by exposing said silicon-containing layer to a nitrogen-containing plasma, and then repeating these steps to increase a thickness of the silicon nitride created thereby. High tensile stress may also be achieved by exposing a surface to a silicon-containing precursor gas in a first nitrogen-containing plasma, treating the material with a second nitrogen-containing plasma, and then repeating these steps to increase a thickness of the silicon nitride formed thereby. In another embodiment, tensile film stress is enhanced by deposition with porogens that are liberated upon subsequent exposure to UV radiation or plasma treatment.

The present invention is directed to an electronically conductive article comprising at least one conductive carbon nanotube layer in contact with at least one conductive layer comprising electronically conductive polymer.

A metal nanoparticle composition for the fabrication of conductive features. The metal nanoparticle composition advantageously has a low viscosity permitting deposition of the composition by direct-write tools. The metal nanoparticle composition advantageously also has a low conversion temperature, permitting its deposition and conversion to an electrical feature on polymeric substrates.

A medical device and method for transportation and release of a therapeutic agent into a mammalian body are disclosed. The medical device is coated with alternating layers of a negatively charged therapeutic agent and a cationic polyelectrolyte, following a controlled adsorption technique. The method is simple, with minimal perturbation to the therapeutic agent and uses clinically acceptable biopolymers such as human serum albumin. The amount of the therapeutic agent that can be delivered by this technique is optimized by the number of the layers of the therapeutic agent adsorbed on the surface of medical device. There is a washing step between alternate layers of the therapeutic agent and cationic polyelectrolyte carrier, so that the amount of the therapeutic agent on the insertable medical device represents the portion that is stably entrapped and adsorbed on to the medical device. The insertable medical device and method according to this invention are capable of reproducibly delivering therapeutic agent to a site in a mammalian body, and allow for a highly reproducible and controllable release kinetics of the therapeutic agent.

In an embodiment, a method for transferring a pattern constituted by vertical spacers arranged on a template with intervals to the template, includes depositing by plasma-enhanced cyclic deposition a layer as a spacer umbrella layer substantially only on a top surface of each vertical spacer made of silicon or metal oxide, wherein substantially no layer is deposited on sidewalls of the vertical spacers and on an exposed surface of the template, followed by transferring the pattern constituted by the vertical spacers to the template by anisotropic etching using the vertical spacers with the spacer umbrella layers.

A method for forming a film on a patterned surface of a substrate by atomic layer deposition (ALD) processing includes: adsorbing onto a patterned surface a first precursor containing silicon or metal in its molecule; adsorbing onto the first-precursor-adsorbed surface a second precursor containing no silicon or metal in its molecule; exposing the second-precursor-adsorbed surface to an excited reactant to oxidize, nitride, or carbonize the precursors adsorbed on the surface of the substrate; and repeating the above cycle to form a film on the patterned surface of the substrate.

A method of forming spacers for spacer-defined multiple pattering (SDMP), includes: depositing a pattern transfer film by PEALD on the entire patterned surface of a template using halogenated silane as a precursor and nitrogen as a reactant at a temperature of 200° C. or less, which pattern transfer film is a silicon nitride film; dry-etching the template using a fluorocarbon as an etchant, and thereby selectively removing a portion of the pattern transfer film formed on a top of a core material and a horizontal portion of the pattern transfer film while leaving the core material and a vertical portion of the pattern transfer film as a vertical spacer, wherein a top of the vertical spacer is substantially flat; and dry-etching the core material, whereby the template has a surface patterned by the vertical spacer on a underlying layer.

Disclosed is an electrode for an electrochemical energy storage device, the electrode comprising a self-supporting layer of a mixture of graphene sheets and spacer particles and / or binder particles, wherein the electrode is prepared without using water, solvent, or liquid chemical. The graphene electrode prepared by the solvent-free process exhibits many desirable features and advantages as compared to the corresponding electrode prepared by a known wet process. These advantages include a higher electrode specific surface area, higher energy storage capacity, improved or higher packing density or tap density, lower amount of binder required, lower internal electrode resistance, more consistent and uniform dispersion of graphene sheets and binder, reduction or elimination of undesirable effect of electrolyte oxidation or decomposition due to the presence of water, solvent, or chemical, etc.

A reaction system is disclosed that may be used to prevent formation of contaminants. The reaction system includes a showerhead that may be configured with a gated nanochannel grid to prevent particular gaseous precursors from passing through depending on whether a voltage is applied. The gated nanochannel grid may allow for both polar and non-polar molecules to pass, or may be configured to allow just non-polar or just polar molecules to pass.

The composite oxide and the composite oxide carrier are manufactured by the precursor forming step and firing step. The composite oxide catalyst is obtained by preparing a composite of catalytic components simultaneously with the formation of the precursor of composite oxide in the step of forming the precursor of composite oxide. The composite oxide and the composite oxide carrier are composed of a composite oxide in which at least one of cerium and zirconium, and aluminium disperse with extremely high homogeneity. With this structure, the heat resistance of the carrier is improved and consequently, enlargement of particles of the composite oxide defining the carrier, and sintering of adjacent particles of the composite oxide can be restrained, whereby the catalyst using the composite oxide carrier in accordance with the present invention is excellent in heat resistance.

A coating of an encapsulated electrophoretic medium is formed on a substrate (106) by dispersing in a fluid (104) a plurality of electrophoretic capsules (102), contacting at least a portion of a substrate (106) with the fluid (104); and applying a potential difference between at least a part of the portion of the substrate (106) contacting the fluid (104) and a counter-electrode (110) in electrical contact with the fluid (104), thereby causing capsules (102) to be deposited upon at least part of the portion of the substrate (106) contacting the fluid (102). Patterned coatings of capsules containing different colors may be deposited in registration with electrodes using multiple capsule deposition steps. Alternatively, patterned coatings of capsules may be formed by applying a fluid form of an electrophoretic medium to a substrate, and applying a temporally varying voltage between an electrode and the substrate. The process may be repeated to allow for deposition of full color displays.

The present invention is directed to nanoparticulate compositions comprising glipizide. The glipizide particles of the composition preferably have an effective average particle size of less than about 2 microns.

A composition and method for releasing a bio-active agent or a drug within a biological environment in a controlled manner is disclosed. The composition is a dual phase polymeric agent-delivery composition comprising a continuous biocompatible gel phase, a discontinuous particulate phase comprising defined microparticles and an agent to be delivered. A microparticle containing a bio-active agent is releasably entrained within a biocompatible polymeric gel matrix. The bioactive agent release may be contained in the microparticle phase alone or in both the microparticles and the gel matrix. The release of the agent is prolonged over a period of time, and the delivery may be modulated and / or controlled. In addition, a second agent may be loaded in some of the microparticles and / or the gel matrix.

Graphitic nanotubes, which includes tubular fullerenes (commonly called "buckytubes") and fibrils, which are functionalized by chemical substitution or by adsorption of functional moieties. More specifically the invention relates to graphitic nanotubes which are uniformly or non-uniformly substituted with chemical moieties or upon which certain cyclic compounds are adsorbed and to complex structures comprised of such functionalized nanotubes linked to one another. The invention also relates to methods for introducing functional groups onto the surface of such nanotubes. The invention further relates to uses for functionalized nanotubes.

A low dielectric constant, patterned, nanoporous material and a method of forming the material. The material is formed by depositing a layer onto a substrate, said layer comprising a reactive organosilicate material, a porogen, an initiator, and a solvent; exposing portions of the layer to energy (e.g., thermal energy or electromagnetic radiation) to change the solubility of portions of the organosilicate material with respect to the solvent; selectively removing more soluble portions of the layer to generate a relief pattern; and decomposing the porogen to thereby generate a nanoporous organosilicate layer.