312 results about "Nano-device" patented technology

A long range, periodically ordered array of discrete nano-features (10), such as nano-islands, nano-particles, nano-wires, non-tubes, nano-pores, nano-composition-variations, and nano-device-components, are fabricated by propagation of a self-assembling array or nucleation and growth of periodically aligned nano-features. The propagation may be induced by a laterally or circularly moving heat source, a stationary heat source arranged at an edge of the material to be patterned (12), or a series of sequentially activated heaters or electrodes. Advantageously, the long-range periodic array of nano-features (10) may be utilized as a nano-mask or nano-implant master pattern for nano-fabrication of other nano-structures. In addition, the inventive long-range, periodically ordered arrays of nano-features are useful in a variety of nanoscale applications such as addressable memories or logic devices, ultra-high-density magnetic recording media, magnetic sensors, photonic devices, quantum computing devices, quantum luminescent devices, and efficient catalytic devices.

A transfer printing process that exploits the mismatch in mechanical or thermo-mechanical response at the interface of a printable micro- or nano-device and a transfer stamp to drive the release of the device from the stamp and its non-contact transfer to a receiving substrate are provided. The resulting facile, pick-and-place process is demonstrated with the assembling of 3-D microdevices and the printing of GAN light-emitting diodes onto silicon and glass substrates. High speed photography is used to provide experimental evidence of thermo-mechanically driven release.

A CMOS semiconductor integrated circuit device. The CMOS device includes an NMOS device comprising a gate region, a source region, and a drain region and an NMOS channel region formed between the source region and drain region. A silicon carbide material is formed within the source region and formed within the drain region. The silicon carbide material causes the channel region to be in a tensile mode. The CMOS device also has a PMOS device comprising a gate region, a source region, and a drain region. The PMOS device has a PMOS channel region formed between the source region and the drain region. A silicon germanium material is formed within the source region and formed with in the drain region. The silicon germanium material causes the channel region to be in a compressive mode.

A heterojunction structure composed of a nitride semiconductor thin film and nanostructures epitaxially grown thereon exhibits high luminescence efficiency property due to facilitated tunneling of electrons through the nano-sized junction, and thus can be advantageously used in light emitting devices.

The invention provides for electromagnetic transmission and reception used in detecting relative changes associated with nano devices existing within an oil reservoir. The system enables monitoring of the relative movement of the nano devices in the oil and/or water over a given area based on the incremental or relative changes of the intensity of the reflections over time. In one embodiment, a source of electromagnetic energy from an array of antennae transmitting immediately in the far field recharges a power source embedded in the nano devices. In another embodiment, the return signals from the nano devices maps the morphology of ensembles of nano devices. In yet another embodiment the transmission controls the movement of the nano devices and controls the function preformed by the nano devices relative to effecting changes in the well to improve production of oil.

A technique of stably bonding a structure including a carbon nanotube with another structure is to be provided. Also, a nano-device that offers excellent performance and high production efficiency is to be provided. A polymer and a carbon nanotube are dispersed in a dispersion medium and on a filled liquid in a Langmuir trough, to obtain a carbon nanotube-based structure constituted of a carbon nanotube and the polymer wound around its rounded surface. The carbon nanotube-based structure is adhered to a substrate, and a ligand is immobilized on a side chain of the polymer. A receptor is immobilized on another carbon nanotube-based structure, and the both carbon nanotube-based structures are joined because of a specific interaction between the ligand and the receptor.

Compositions, systems and methods utilizing engineered surgical irrigants providing delivery of components with therapeutic or other secondary benefits. Engineered irrigants provide targeted delivery of desired agents, including agents for propulsion of nano-devices, agents including molecular probes, gene expression agents, magnetically orientable agents, agents for discrete tissue temperature detection and tissue regeneration agents.

The invention discloses a preparation method of a flexible transparent conducting polymer thin film with antibacterial properties, and belongs to the technical field of nanocomposite materials. The preparation method comprises the steps: preparing stably dispersed graphene oxide (GO) colloid by a Hummers method at first; next, performing surface modification on the graphene oxide under the electrostatic adsorption action of poly(diallyldimethylammonium chloride) (PDDA) and preparing a nanowire/graphene nano hybrid material by a method of inducing the growth of silver nanowires in situ, and then further preparing a silver nanowire/graphene/polyvinyl alcohol thin film by a solution casting method. The thin film has the characteristics of antibiosis, high electricconductivity, high lighttransmittance, flexibility and the like, and is expected to be applied to a plurality of fields such as biosensing and nano-devices; and therefore, the flexible transparent conducting polymer thin film with antibacterial properties has a wide application prospect.

A microradio is provided with a hysteretic switch to permit an optimum range increasing charging cycle, with the charging cycle being long relative to the transmit cycle. Secondly, an ensemble of microradios permits an n² power enhancement to increase range with coherent operation. Various multi-frequency techniques are used both for parasitic powering and to isolate powering and transmit cycles. Applications for microradios and specifically for ensembles of microradios include authentication, tracking, fluid flow sensing, identification, terrain surveillance including crop health sensing and detection of improvised explosive devices, biohazard and containment breach detection, and biomedical applications including the use of microradios attached to molecular tags to destroy tagged cells when the microradios are activated. Microradio deployment includes the use of paints or other coatings containing microradios, greases and aerosols. Moreover, specialized antennas, including microcoils, mini dipoles, and staircase coiled structures are disclosed, with the use of nano-devices further reducing the size of the microradios.

A nanodevice (1) for a desired function includes a substrate (11), a one-dimensional nanostructure (12), a functional layer (20) having a desired function, a conductive thin film electrode (30), and an insulating layer (40). The one-dimensional nanostructure is operatively extends from the substrate. The functional layer is surrounds at least a portion of the one-dimensional nanostructure. The conducting thin film electrode is surrounds/encompasses the functional layer. The insulating layer is positioned between the substrate and the conductive thin film electrode, thereby electrically insulating the one from the other. Further, the nanodevice can incorporate one or more functional units 50, each unit including a one-dimensional nanostructure and a respective functional layer. The units may or may not share the same conductive thin film electrode and/or insulating layer.

An ESD protection device with a silicon controlled rectifier (SCR) structure which is applied to a nano-device-based high-speed I/O interface circuit and semiconductor substrate operated by a low power voltage. The triple-well low-voltage-triggered ESD protection device includes: a deep n-type well formed on a p-type substrate; n- and p-type wells formed to be mutually connected in the deep n-type well; and a bias application region for applying a direct bias voltage to the p-type well.

The invention discloses a preparation method of graphite type carbon nitride nanotubes. The preparation method comprises the following steps: adding melamine powder into a high temperature-resistant container, and placing the high temperature-resistant container on a vibrator for vibration treatment; then adding a cover on the high temperature-resistant container, placing the high temperature-resistant container into a program heating control device, heating to a first preset temperature at a relatively high heating rate and keeping for a period of time; further heating the program heating control device to a second preset temperature at a relatively low heating rate and keeping for a period of time; and cooling an obtained product to room temperature, and then grinding to form powder so as to obtain the graphite type carbon nitride nanotubes disclosed by the invention. In the synthesis process of the preparation method, the addition of a template or additional organic matters is not required, the preparation method has the advantages of low price, high yield, good repeatability, no impurity interference of products and the like, is simple and easy to operate, and the prepared carbon nitride nanotubes have good fluorescence performance and photocatalytic performance, and have broad application prospects in the fields of nano devices, photocatalysis and the like.

The present invention is the production process of aluminum template with nano holes, and is especially the combined anode oxidation and ion bombardment process of producing aluminum template with nano holes in high density and high order. The technological process includes annealing aluminum foil, cleaning, electrochemical polishing, anode oxidation in water solution of oxidizing acid, such as sulfuric acid, oxalic acid, phosphoric acid, to form alumina film, ion bombardment to form holes in the film physically, water rinsing and stoving. The technological process is simple and low in cost, and the holes are densely distributed in certain order and have controllable shape and size of several nano to 100 nano. The said template may be used widely in direct assembling of nano device except its traditional industrial application.

A free standing hydrotalcite/polymer composite film and a preparation method thereof pertain to the technical field of hydrotalcite film material. The general chemical formula of the film is PEI/(PAA/PEI/PAA/LDHs)n, wherein PEI is polyethyleneimine, PAA is polyacrylic acid, LDHs are hydrotalcite nano particles or hydrotalcite nano sheets. The preparation is that a hydrotalcite precursor is prepared firstly by nucleation and crystallization, then a nano particle sol which is dispreaded evenly is prepared by solvent dispersing method or a hydrotalcite nano sheet sol is prepared by formamide dissection, then the nano particles or nano sheets and polymer are reassembled on the base glass which is surface treated through electrostatic self-assembly technology, so as to obtain the free standing hydrotalcite/polymer composite film after thermal crosslinking treatment. The free standing hydrotalcite/polymer composite film and the preparation method thereof have the advantages that the film has good toughness, thermal stability and photopermeability and has potential application value in the separation, sensor, nano devices and other fields.

The invention relates to novel methods of incorporating nanotubes for use in micro- or nano-devices. The invention further relates to incorporating nanotubes in micro or nano-devices and particularly synthesizing or growing nanotubes directly in or on components of a micro- or nano-device. In a particular embodiment, the invention relates to methods of synthesizing or growing nanotubes in a gas chromatography column and their use in portable gas chromatography devices.

The invention belongs to the fields of high polymer materials and biomedical engineering and particularly relates to a method for preparing pH-responsive graft copolymer taking ethyl cellulose as a main chain. The method comprises the following steps of: performing esterification reaction on residual hydroxyl in the ethyl cellulose main chain and a bromine-containing compound under the protection of inert gas nitrogen or argon to convert the hydroxyl into a bromine group; and performing atom transfer radical polymerization on a methacrylic acid-N,N-lignocaine ethyl ester monomer by using the bromine group as a macroinitiator to form pH-responsive polymer so as to finally obtain the pH-responsive graft copolymer taking the ethyl cellulose as the main chain. The pH-responsive graft copolymer taking the ethyl cellulose as the main chain has biodegradability, biocompatibility and pH value sensitivity and can be self-assembled into stable nano micelles in water, so the pH-responsive graft copolymer can be widely applied to the fields such as medicament release control carriers, biological intelligent switches, biological sensors, biological nano devices and the like. The method has the advantages of simpleness, practicability, industrialized production of raw materials and high popularization and application value.

Embodiments of the present invention provide hydrogen-free dielectric films and methods of fabrication. A hydrogen-free precursor, such as tetraisocyanatosilane, and hydrogen-free reactants, such as nitrogen, oxygen (O2/O3) and nitrous oxide are used with chemical vapor deposition processes (PECVD, thermal CVD, SACVD, HDP CVD, and PE and Thermal ALD) to create hydrogen-free dielectric films. In some embodiments, there are multilayer dielectric films with sublayers of various materials such as silicon oxide, silicon nitride, and silicon oxynitride. In embodiments, the hydrogen-free reactants may include Tetra Isocyanato Silane, along with a hydrogen-free gas including, but not limited to, N2, O2, O3, N2O, CO2, CO and a combination thereof of these H-Free gases. Plasma may be used to enhance the reaction between the TICS and the other H-free gasses. The plasma may be controlled during film deposition to achieve variable density within each sublayer of the films.

The invention discloses a method for preparing a sulfonated polyaniline graft multi-walled carbon nano-tube composite material. The method comprises the following steps: after a multi-walled carbon nano-tube the surface of which is provided with a carboxyl group is subjected to acyl chlorination, the multi-walled carbon nano-tube reacts with para-phenylene diamine, so that anilino group is connected to the surface of the multi-walled carbon nano-tube through amido link; the anilino group connected to the surface of the carbon nano-tube initiates polymerization after the anilino group is oxidized, and the multi-walled carbon nano-tube and sulfonated polyaniline can be connected together through the amido link by further sulfonation and hydrolysis reactions, thereby forming the composite material using the multi-walled carbon nano-tube as a core and the sulfonated polyaniline as a shell. The method solves the problems that the polyaniline can be dissolved in water but has low electrical conductivity after the polyaniline is sulfonated, and the multi-walled carbon nano-tube can be easily agglomerated, but can not be dissolved in water, which has important significance in practical application for sulfonated polyaniline, the multi-walled carbon nano-tube and the polyaniline/multi-walled carbon nano-tube composite material. The method can be widely applied to microelectronic component printing, photoelectric nano-devices, sensors and the like.

The invention relates to a low-temperature preparation method of a highly oriented single crystal titanium dioxide nanowire array film, which utilizes improved low-temperature heterogeneous phase solvent thermal technology to be combined with interface chemical reaction, and leads the single crystal titanium dioxide nanowire array film with high orientation, good crystallization and adjustable size to be directly deposited on the surface of transparent conductive glass in a large area. The one-dimensional nano-structure array film grows vertically to the surface of the conductive glass, can be taken as a nano-electrode to be assembled into a novel nano device, especially can be directly taken as a photoelectrode of a novel solar battery for use, improves the transmission rate of photoelectrons, and reduces the recombination velocity of the photoelectrons. The preparation process of the materials is simple, environment-friendly and low in cost, and the preparation method is easy for industrialized popularization and use, and is beneficial to developing and utilizing solar energy with low cost.

The invention relates to a method for preparing titanium dioxide nanowire, which belongs to the technical field of production of inorganic materials. The method for preparing titanium dioxide comprises the following steps of: firstly putting titanium foils as the titanium source into a NaOH solution added with water soluble chlorate to carry out hydro-thermal reaction to produce sodium titanate nanometer, then carrying out acid replacement treatment to obtain meta-titanic acid nanowire, and finally calcining the meta-titanic acid nanowire to obtain titanium dioxide nanowire. The titanium dioxide nanowire obtained by using the method has the diameter of 3-15nm and the length of 1-15 nu m, is pure and regular in size arrangement, and has good crystallinity and large specific surface area; the diameter of the titanium dioxide nanowire can be adjusted through adjusting the concentration of water soluble chlorate; the titanium dioxide nanowire produced by using the method can be used in the aspects of solar batteries, photocatalysis, water splitting, sensors, nano-electronics, optoelectronic nano-devices and the like.