173 results about "Nano devices" patented technology

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.

The invention discloses a method for rapidly synthesizing a BTC (1,3,5-benzenetricarboxylic acid)-based nanoscale organometallic framework material at room temperature. The nanomaterial is prepared by the following steps: mixing metal acetate aqueous solution with BTC solution at room temperature, and reacting to obtain BTC-based organometallic framework nanoparticles. The method is rapid, simple and energy-saving; the yield is high; the used raw materials and solvents are inexpensive and easily available; the safety problem of commonly used nitrate is not caused; the method is favorable to the industrial production and has wide application prospects in the fields of catalysis, adsorption, drug carriers, building of nano devices and the like.

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.

Disclosed herein is a nanodevice. Disclosed herein too is a method of manufacturing a nanodevice. In one embodiment the nanodevice includes a first substrate; a second substrate; a nanowire; the nanowire contacting the first substrate and the second substrate; the nanowire comprising a metal, a semi-conductor or a combination thereof.

A method of fabricating a device including imprinting a mold having a protrusion against a substrate having a resist layer such that the protrusion engages the resist layer. The mold further has a mask member positioned generally adjacent the resist layer. Radiation energy is then transmitted through the mold and into the resist layer; however, the mask member substantially prevents transmission of the radiation energy therethrough, thereby defining an unexposed area in the resist layer. Once the mold is removed from the substrate, which consequently forms a first feature from nanoimprinting, the unexposed area of resist layer is removed through dissolving in a developer solution.

A scanning Kelvin microprobe (SKM) system capable of measuring and analyzing surface characteristics of samples is provided. Also provided is a process of measuring and analyzing surface characteristics of samples. Further, there are provided uses of the SKM system in measuring and analyzing surface characteristics of conductors, semiconductors, insulators, chemicals, biochemicals, photochemicals, chemical sensors, biosensors, biochemical microarrays, microelectronic devices, electronic imaged devices, micromachined devices, nano-devices, corroded materials, stressed materials, coatings, adsorbed materials, contaminated materials, oxides, thin films, and self assembling monolayers.

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.

The present invention pertains to a nano-based sensing device (a sensor) comprising a nano-scale working electrode that can be used for the ultra-sensitive detection of blood analytes, disease biomarkers, and other target molecules. The present invention also pertains to a method for detecting analytes using the sensor as the sensor element of a microfluidic device.

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 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.

A method of depositing or etching a micro- or nano-scale pattern on a work piece is disclosed, including the steps of: (a) placing the work piece in an electrochemical reactor in close proximity to a patterned tool; (b) connecting the work piece such that it is the anode if is to be etched or the cathode if it is to be deposited, and the patterned tool such that it is the counter electrode; (c) pumping electrolytic fluid necessary for the electrolytic operation of the cell formed between the two electrodes; and (d) applying a current across the electrodes to etch or deposit the work piece.

The invention discloses a method for preparing alkali zinc chloride nano-powder in hexagonal flake structures, which is characterized by including steps: dissolving zinc chloride and hydroxyl reagent into water or water-alcohol mixed solution, adjusting the solution pH within a range of from 2.0 to 9.0, and obtaining the alkali zinc chloride nano-powder after chemical precipitation reaction under water bath at 50-99 DEG C or heating via an oven for 0.1-72 hours. The molecular formula of the alkali zinc chloride is Zn5(OH)8C12 (H2O), each flake is regularly hexagonal, the size of each flake ranges from 0.1 micrometer to 100 micrometer, and the thickness of each flake ranges from 20 nanometers to x micrometers. The alkali zinc chloride nano-powder which is a zinc-contained compound in a special hexagonal flake structure is expected to be applied in fields of chemical synthesis, chemical catalysis, photocatalysis, sensors, nano devices and the like.

The invention relates to a controllable graphene nanolayer preparation method. The method comprises the steps that graphite powder is put into a reaction container, a solvent is injected into the reaction container, ultrasonic vibration is conducted, and a stirrer is started, so that the raw material-graphite powder is fully and uniformly distributed in the solvent; a laser path is adjusted, so that laser beams sequentially pass through a total reflective mirror and a focus lens and then are focused at the position 3 mm below the liquid level; a pulse laser is started, different kinds of laser energy are adjusted to enable laser light to irradiate graphite particles in a liquid environment, after the reaction process lasts 1 h to 2 h, the laser is stopped, and finally graphene with the different layer numbers can be obtained. The method is easy to operate, controllable in layer number and free of toxins and pollution and has potential application in the fields of nanometer equipment and spintronics.

The invention discloses a synthesis method of basic zinc chloride monocrystal nanorods. The synthesis method is characterized by comprising the following steps: taking zinc chloride and ammonia water as raw materials and reacting the raw materials at the room temperature; washing with deionized water, and centrifuging; adding deionized water which is 10-20 times of the volume of a sample, heating in an oven at 80 DEG C for 2 hours and then standing still; washing the sample with absolute ethyl alcohol, and then centrifuging; and drying in the oven at 40 DEG C for 6 hours to prepare the basic zinc chloride Zn5(OH)8Cl2.H2O monocrystal nanorods with diameters of about 70 nm and lengths of 400nm. The product prepared by the synthesis method has a wide application prospect and can be applied to various fields such as chemical synthesis, photocatalysis, sensors and nano devices, and the synthesis method is in no need of any additives or expensive equipment, and has the advantages of simplicity and convenience in operation, easiness in control and industrialization, low production cost, and the like.

The invention discloses a device and method for manufacturing a micro-nano structure, belonging to the field of micro-nano manufacture. The device mainly comprises a ballpoint pen, a plating solution, a ballpoint pen rack, an atomic force micro detection system, a cathode platform, a micro motion workbench and a trace electricity power supply, wherein the ballpoint pen containing the plating solution is fixed on the ballpoint pen rack, the ballpoint pen rack is integrally connected with the atomic force micro detection system and is used for roughly positioning and accurately positioning the atomic force micro detection system, the cathode platform and the micro motion workbench are fixedly connected and are spaced by using an insulation material, a ballpoint pen refill is connected with the anode of the trace electricity power supply, and the cathode platform is connected with the cathode of the trace electricity power supply. In the invention, by the application of the trace electricity power supply and a carbon nanotube, atomic assembly, atomic group sedimentation and three-dimensional micro-nano molding become easier, simpler and more precise. The device and the corresponding molding method have certain significances to precise manufacture of micro-nano devices, micro-nano electromechanical progress and development of quantum devices.

The invention belongs to the field of functional polymer materials and in particular relates to a method for preparing a multi-responsive block copolymer containing azopyridine. The preparation method is characterized by synthesizing azopyridine with photo-responsivity through a diazo coupling reaction and then reacting azopyridine with 6-chloro-1-hexanol and methacryloyl chloride in sequence to prepare a methacrylate monomer containing an azopyridine group; then synthesizing a methacrylic acid-N,N-(dimethylamino)ethyl monomer into a macroinitiator through atom transfer radial polymerization (ATRP) under the protection of an inert gas nitrogen or argon, wherein the block has temperature sensitivity and temperature responsivity; and finally synthesizing the macroinitiator with an azopyridine monomer to prepare the multi-responsive block copolymer containing azopyridine through ATRP. The method has the following advantages that the block copolymer simultaneously has photo-responsivity, pH sensitivity and temperature sensitivity and can be self-assembled into various aggregation morphologies such as stable nano micelle and vesicles in water, so the block copolymer is widely applied in the fields such as drug controlled release carriers, smart photo switches, photo sensors and nano devices; the synthesis method is simple and practical; the raw materials can be industrially produced; and the method has good popularization and application values.

The invention belongs to the technical field of micro-nano devices, and particularly relates to an SERS (Surface Enhanced Raman Scattering) probe molecule self-collecting micropipe as well as a preparation method and an application thereof. The preparation method comprises the steps: preparing a substrate, making a sacrificial layer on the substrate; depositing film layers of different materials with internal stress on the sacrificial layer, wherein the materials of the deposited film layers are capable of providing better SERS characteristics or capable of catalytically decomposing H2O2 to generate oxygen; selectively removing the sacrificial layer between the film layer and the substrate, releasing a film and coiling into a micropipe; and immersing the micropipe in a solution containing a defined amount of coupling agent for certain time, forming a self-assembled single-layer film on the outer surface of the micropipe, and finally obtaining the SERS probe molecule self-collecting micropipe. The device can be used for collecting and detecting a probe molecule in the solution. An SERS signal of the probe molecule is measured by a Raman spectrometer.

The invention discloses a method for quantifying surface appearance of a representation film based on multi-scale system theory. The method comprises the following steps: firstly using a scanning probe microscope to acquire a surface appearance image of the film through multistage conversion of scanning size, then judging whether the surface appearance of the film has multi-scale characteristics by using a multi-scale system analysis tool, and determining the characteristic size of a fluctuation structure on the surface of the film; then aiming at the surface appearance image with the multi-scale characteristics, using a two-dimensional wavelet packet analytic method to carry out multi-scale layer decomposition on the surface appearance image; comparing decomposed image group components with characteristic size values in size to determine the reconstruction delivery size corresponding to the decomposed image group components, and then selecting and reconstructing the image group components to obtain surface fluctuation structural image of the film with different characteristic sizes; and finally using a surface roughness method to evaluate a reconstructed image to acquire related quantitative information. The method is suitable for exquisite and perfect quantified representation for the surface appearance of a film material in micro/nano devices.

The invention discloses a periodic bowl-shaped structural template and a preparation method thereof. The preparation method comprises the following steps: depositing a silicon dioxide mask layer on a substrate, spin-coating photoresist on the silicon dioxide mask layer, preparing a periodic micro/nano photoresist lattice pattern, depositing a thin metal film on the photoresist structure, peeling to obtain a metal hole array pattern, forming a bowl-shaped array structure of the silicon dioxide by adopting a wet etching technology by taking the metal hole array structure as a mask, and finally, removing the metal mask. The periodic bowl-shaped structural template prepared by the preparation method is large in area and uniform and complete in structure, has a very good application prospect in the aspects of preparation of patterned structures, photonic crystals, surface roughening, surface flocking and micro/nano devices and the like, can be widely applied to the aspects of LEDs (Light-Emitting Diodes), solar batteries, photonic crystals, quantum devices and the like, or serves as an etching mask layer of the substrate material, or is used for the manufacturing of other micro/nano structures.

A carbon-based semiconductor device includes a substrate, source/drain contacts, a graphene channel, a dielectric layer, and a gate. The source/drain contacts are formed on the substrate. The graphene channel is formed on the substrate connecting the source contact and the drain contact. The dielectric layer is formed on the graphene channel with a molecular beam deposition process. The gate contact is formed over the graphene channel and on the dielectric. The gate contact is in a non-overlapping position with the source and drain contacts leaving exposed sections of the graphene channel between the gate contact and the source and drain contacts.