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230 results about "Molecular size" patented technology
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Molecular size is a measure of the area a molecule occupies in three-dimensional space. The amount of space any mass takes up in three-dimensional space is known specifically as its volume.
Methods and compositions for the manipulation and characterization of individual nucleic acid molecules
InactiveUS6147198AQuick analysisQuick buildSugar derivativesMicrobiological testing/measurementMicroscope slideMap Location
A method for observing and determining the size of individual molecules and for determining the weight distribution of a sample containing molecules of varying size, which involves placing a deformable or nondeformable molecule in a medium, subjecting the molecule to an external force, thereby causing conformational and / or positional changes, and then measuring these changes. Preferred ways to measure conformational and positional changes include: (1) determining the rate at which a deformable molecule returns to a relaxed state after termination of the external force, (2) determining the rate at which a molecule becomes oriented in a new direction when the direction of the perturbing force is changed, (3) determining the rate at which a molecule rotates, (4) measuring the length of a molecule, particularly when it is at least partially stretched, or (5) measuring at least one diameter of a spherical or ellipsoidal molecule. Measurements of relaxation, reorientation, and rotation rates, as well as length and diameter can be made using a light microscope connected to an image processor. Molecule relaxation, reorientation and rotation also can be determined using a microscope combined with a spectroscopic device. The invention is particularly useful for measuring polymer molecules, such as nucleic acids, and can be used to determine the size and map location of restriction digests. Breakage of large polymer molecules mounted on a microscope slide is prevented by condensing the molecules before mounting and unfolding the molecules after they have been placed in a matrix.
Owner:WISCONSIN ALUMNI RES FOUND
Image processing and analysis of individual nucleic acid molecules
InactiveUS6294136B1Improve throughputQuick buildMaterial analysis by electric/magnetic meansLaboratory glasswaresMicroscope slideMap Location
A method for observing and determining the size of individual molecules and for determining the weight distribution of a sample containing molecules of varying size, which involves placing a deformable or nondeformable molecule in a medium, subjecting the molecule to an external force, thereby causing conformational and / or positional changes, and then measuring these changes. Preferred ways to measure conformational and positional changes include: (1) determining the rate at which a deformable molecule returns to a relaxed state after termination of the external force, (2) determining the rate at which a molecule becomes oriented in a new direction when the direction of the perturbing force is changed, (3) determining the rate at which a molecule rotates, (4) measuring the length of a molecule, particularly when it is at least partially stretched, or (5) measuring at least one diameter of a spherical or ellipsoidal molecule. Measurements of relaxation, reorientation, and rotation rates, as well as length and diameter can be made using a light microscope connected to an image processor. Molecule relaxation, reorientation and rotation also can be determined using a microscope combined with a spectroscopic device. The invention is particularly useful for measuring polymer molecules, such as nucleic acids, and can be used to determine the size and map location of restriction digests. Breakage of large polymer molecules mounted on a microscope slide is prevented by condensing the molecules before mounting and unfolding the molecules after they have been placed in a matrix.
Owner:WISCONSIN ALUMNI RES FOUND
Image processing and analysis of individual nucleic acid molecules
InactiveUS6509158B1Quick analysisQuick buildMicrobiological testing/measurementChemiluminescene/bioluminescenceMicroscope slideMap Location
Owner:WISCONSIN ALUMNI RES FOUND
Image processing and analysis of individual nucleic acid molecules
InactiveUS6610256B2Quick analysisQuick buildBioreactor/fermenter combinationsBiological substance pretreatmentsMicroscope slideImaging processing
Owner:WISCONSIN ALUMNI RES FOUND
Method and apparatus for characterizing solutions of small particles
A method and apparatus is described by which means molecules in suspension may be characterized in terms of the size and mass distributions present. As a sample solution is separated by centrifugal means, it is illuminated at a particular radial distance from the axis of rotation by a fine, preferably monochromatic, light beam. Despite the high resolution of such devices, a key problem associated with most separators based upon use of centrifugal forces is the difficulty in deriving the absolute size and / or molar mass of the separating molecules. By integrating means to detect light scattered, over a range of scattering angles, from samples undergoing centrifugal separation, molecular sizes in the sub-micrometer range may be derived, even in the presence of diffusion. Adding a second light beam at a displaced rotational angle, preferably of an ultraviolet wavelength, that intersects the sample at the same radial region as the first beam permits determination of the molecular concentration at that region. Combining the light scattering data with the associated concentration permits the determination of the associated molar mass. In a preferred embodiment, the light beam and detectors may be controlled to scan synchronously the sample radially during separation.
Owner:WYATT TECH
Betaine with Calcium and/or Strontium Antiperspirants
InactiveUS20070020211A1Good curative effectImprove skinCosmetic preparationsToilet preparationsAntiperspirantsBetaine
Aluminum and aluminum-zirconium antiperspirant compositions comprising basic aluminum chlorides that have a particular molecular size distribution defined by having an SEC-HPLC Band III / II ratio of at least 0.5, having SEC-HPLC Band III plus Band II area of at least 70% of the total area and having SEC-HPLC Band I content no more than 5% and containing betaine (trimethylglycine), calcium and / or strontium are disclosed. Also disclosed are the methods of making these compositions and the use thereof in consumer acceptable antiperspirant vehicles such as aerosols, gels, roll-on, sticks and soft solids.
Owner:SUMMIT RES LAB
Image processing and analysis of individual nucleic acid molecules
InactiveUS20030036067A1Improve throughputQuick buildBioreactor/fermenter combinationsBiological substance pretreatmentsMicroscope slideImaging processing
A method for observing and determining the size of individual molecules and for determining the weight distribution of a sample containing molecules of varying size, which involves placing a deformable or nondeformable molecule in a medium, subjecting the molecule to an external force, thereby causing conformational and / or positional changes, and then measuring these changes. Preferred ways to measure conformational and positional changes include: (1) determining the rate at which a deformable molecule returns to a relaxed state after termination of the external force, (2) determining the rate at which a molecule becomes oriented in a new direction when the direction of the perturbing force is changed, (3) determining the rate at which a molecule rotates, (4) measuring the length of a molecule, particularly when it is at least partially stretched, or (5) measuring at least one diameter of a spherical or ellipsoidal molecule. Measurements of relaxation, reorientation, and rotation rates, as well as length and diameter can be made using a light microscope connected to an image processor. Molecule relaxation, reorientation and rotation also can be determined using a microscope combined with a spectroscopic device. The invention is particularly useful for measuring polymer molecules, such as nucleic acids, and can be used to determine the size and map location of restriction digests. Breakage of large polymer molecules mounted on a microscope slide is prevented by condensing the molecules before mounting and unfolding the molecules after they have been placed in a matrix.
Owner:WISCONSIN ALUMNI RES FOUND
Method and apparatus for characterizing solutions of small particles
A method and apparatus is described by which means molecules in suspension may be characterized in terms of the size and mass distributions present. As a sample solution is separated by centrifugal means, it is illuminated at a particular radial distance from the axis of rotation by a fine, preferably monochromatic, light beam. Despite the high resolution of such devices, a key problem associated with most separators based upon use of centrifugal forces is the difficulty in deriving the absolute size and / or molar. mass of the separating molecules. By integrating means to detect light scattered, over a range of scattering angles, from samples undergoing centrifugal separation, molecular sizes in the sub-micrometer range may be derived, even in the presence of diffusion. Adding a second light beam at a displaced rotational angle, preferably of an ultraviolet wavelength, that intersects the sample at the same radial region as the first beam permits determination of the molecular concentration at that region. Combining the light scattering data with the associated concentration permits the determination of the associated molar mass. In a preferred embodiment, the light beam and detectors may be controlled to scan synchronously the sample radially during separation.
Owner:WYATT TECH
Optical information recording medium, reproducing method thereof, and manufacturing method thereof
InactiveUS20060072434A1Suppress noiseHigh densityMechanical record carriersRecord information storageHigh densityImage resolution
Super-resolution technology was proposed for generating marks smaller than the optical resolution in order to record data at high density on the optical disk. However, the achievable high density of the super-resolution technology was limited due to fluctuation of the region exhibiting the super-resolution effect due to the grain size or the molecular size comprising the super-resolution film. However fluctuation in the region exhibiting the super-resolution effect is reduced by utilizing recording marks possessing their own super-resolution effect and also by separating the recording marks from each other.
Owner:HITACHI LTD
Block copolymers
It is to provide a block copolymer that can form a microphase separation structure even with a small molecular size, and that can form a microphase separation structure with a small domain size.It is a block copolymer represented by the formula A-C-B (wherein A represents a segment which is a homopolymer or random or block copolymer consisting of at least 1 kind or repeat units represented by formula (II);B represents a segment which is a homopolymer, or random or block copolymer consisting of at least 1 kind of repeat units represented by formula (III);C represents A, B or A-B; however, at least 1 segment of eachA has a water-repellent group, or at least 1 segment of each B has a polar group); which block copolymer has a mass average molecular weight of 50,000 or less, and that can form a microphase separation structure.
Owner:NIPPON SODA CO LTD
Entropic trapping and sieving of molecules
Nanofluidic entropic traps, comprising alternating thin and thick regions, sieve small molecules such as DNA or protein polymers and other molecules. The thick region is comparable or substantially larger than the molecule to be separated, while the thin region is substantially smaller than the size of the molecules to be separated. Due to the molecular size dependence of the entropic trapping effect, separation of molecules may be achieved. In addition, entropic traps are used to collect, trap and control many molecules in the nanofluidic channel. A fabrication method is disclosed to provide an efficient way to make nanofluidic constrictions in any fluidic devices.
Owner:CORNELL RES FOUNDATION INC
Method of forming a nanogap and method of manufacturing a nano field effect transitor for molecular device and bio-sensor, and molecular device and bio-sensor manufactured using the same
InactiveUS20060154400A1Material nanotechnologyNon-rotating vibration suppressionSelf-assembled monolayerThin layer
The present invention relates to a method of forming a nanogap, a method of manufacturing a nano field effect transistor for a molecular device or a bio-sensor, and a fabrication thereof, and more particularly, to a method of forming a high reproductive nanogap using a thin layer with a molecular size or a size which is similar to that of a molecule and a nano field effect transistor manufactured by the method of forming the nanogap. The method of forming a nanogap according to the present invention comprises steps of (a) forming sequentially an insulating layer, a first metal layer and a hard mask on a silicon substrate; (b) etching partially the first metal layer using the mask as an etching mask; (c) forming a self-assembled monolayer (SAM) on a side surface of the first metal layer to form a nanogap on the silicon substrate; (d) depositing metal on the entire structure including the mask to form a second metal layer; (e) removing the metal deposited on the hard mask using a lift-off process by etching the mask formed in step (a) and (f) etching the SAM formed in step (c) to form the nanogap.
Owner:KOREA ADVANCED INST OF SCI & TECH
Functionalized TGF-beta fusion proteins
This disclosure relates to TGF-beta family protein fusions that display substantial native TGF-beta family protein function while also having an additional functionality conveyed by the addition of a functionalizing peptide domain. Such functionalizing peptide domain can be a tag peptide (e.g., an epitope tag, a purification tag, a molecular size differentiation tag, etc.) or a passenger or targeting protein. Also provided are methods of making these fusions, as well as methods of using them for diagnosis and diagnosis of various conditions, in measuring and monitoring levels of the fusion molecule in experimental systems and subjects, and in measuring and detecting receptor proteins.
Owner:GOVERNMENT OF THE UNITED STATE OF AMERICA AS REPRESENTED BY THE SEC OF THE DEPT OF HEALTH & HUMAN SERVICES THE
Silicon-containing polycarboxylate superplasticizer as well as preparation method and use thereof
The invention discloses a silicon-containing polycarboxylate superplasticizer. The silicon-containing polycarboxylate superplasticizer is characterized by having a molecular structural formula (IV) as shown in the specification, wherein a and b are both greater than 0. C is greater than or equal to 0, and d is greater than 0; M1 is an organic silicon monomer structure of which the molecular structure contains a plurality of organic silicon molecules cross-linked by use of Si-O-Si bonds; M2 is one or both of -H and -Na; M3 is one or both of -H and -Na; M4 is one or both of ester monomers or ether monomers. According to the silicon-containing polycarboxylate superplasticizer, the organic silicon structure is introduced into the structure of the common polycarboxylate superplasticizer. A double-bond organic silicon monomer of a large molecular size is prepared by virtue of the hydrolysis reaction, and then the prepared organic silicon monomer is used in a polycarboxylate superplasticizer synthesis system, and therefore, the molecular size of the polycarboxylate superplasticizer is increased and then the polycarboxylate superplasticizer cannot come into the intercalation structure of soil easily, and furthermore, the effects of resisting soil and retarding consumption are achieved.
Owner:SHANGHAI TAIJIE CHEM
Low-temperature hot-seal adhesive and preparation method thereof
ActiveCN101914360AHeat seal strength is not lowReasonable workmanshipFlexible coversWrappersEpoxyAcrylic resin
The invention discloses a low-temperature hot-seal adhesive, which consists of the following raw materials in percentage by weight: 10 to 30 percent of main resin, 5 to 15 percent of auxiliary resin, 0.2 to 3 percent of plasticizer, 0.2 to 1 percent of surface modifier and 60 to 80 percent of solvent. The main resin is one or two of a polyester resin, a plastic polyurethane resin and a plastic acrylic resin with the molecular size of between 15,000 and 25,000; and the auxiliary resin is one of a vinyl chloride copolymer resin, a plastic polyurethane resin and an epoxy resin with the molecular size of between 10,000 and 20,000. The low-temperature hot-seal adhesive has the advantages that: 1, the adhesive has low-temperature hot-seal property, and the hot-seal strength is not lower than that of a common hot-seal adhesive for an aluminum foil; and 2, the adhesive has hot-seal diversification, can seal PVC, PC and PS sheets, and meets the requirement on hot-seal strength.
Owner:JIANGSU ZHONGJIN MATAI MEDICINAL PACKAGING
Separation apparatus, method of fabricating the same, and analytical system
InactiveUS20060011480A1High resolutionLow costSludge treatmentVolume/mass flow measurementMolecular sizeBiomedical engineering
A separation apparatus (100) has a separation channel (112), a partition wall (301a) and a partition wall (301b), wherein each of the partition wall (301a) and the partition wall (301b) has a capture portion (300) formed thereon. Molecules having a size acceptable by the capture portions (300) provided on the partition wall (301a) and the partition wall (301b) are captured by the capture portion (300) and reduced in the travel speed through the separation channel (112), and this makes it possible to precisely separate the sample depending on the molecular size.
Owner:NEC CORP
Fluid conduit
The present invention relates to a fluid conduit, and to a multi-conduit umbilical for use in the transportation of chemicals with small molecular size and shape e.g. methanol ethanol and other hydrocarbon fluids used in the oil industry. The conduit comprises a flexible fluid hose encapsulated by at least one metallized layer which is formed and arranged to minimize permeation of a fluid being transported in the fluid hose. In use in a multi-conduit umbilical the metallised layer minimizes permeation into adjacent fluid hoses containing chemicals. The invention is characterized in that the fluid hose(s) have differing levels of encapsulation and thereby permeation, along a given length according to the operational requirements of the fluid conduit / umbilical. Typically such fluid conduits / umbilicals will have lengths in excess of 100 km.
Owner:OCEANEERING INT SERVICES
Dilution limiting device
InactiveUS20080283019A1Reduce lubricationLubrication of auxillariesLubricant conduit arrangementsChemical physicsMolecular size
An anterior chamber receives a mixture fluid, in which a lubricant oil and a fuel are mixed. A semipermeable separation film is permeable to the fuel component in the anterior chamber and is not permeable to the lubricant oil in the anterior chamber due to a molecular size difference between the lubricant oil and the fuel, so that the semipermeable separation film selectively separates the fuel component from the mixture fluid. A posterior chamber is placed on an opposite side of the semipermeable separation film, which is opposite from the anterior chamber. The posterior chamber receives the separated fuel component, which is separated by the semipermeable separation film.
Owner:PROFORM FINISHING PROD LLC +2
Solid phase technique for selectively isolating nucleic acids
InactiveUS20060003357A1High purityIncrease ionic strengthMicrobiological testing/measurementNucleic acid reductionPurification methodsMagnetic bead
A method of isolating target nucleic acid molecules from a solution comprising a mixture of different size nucleic acid molecules, in the presence or absence of other biomolecules, by selectively facilitating the adsorption of a particular species of nucleic acid molecule to the functional group-coated surface of magnetically responsive paramagnetic microparticles is disclosed. Separation is accomplished by manipulating the ionic strength and polyalkylene glycol concentration of the solution to selectively precipitate, and reversibly adsorb, the target species of nucleic acid molecule, characterized by a particular molecular size, to paramagnetic microparticles, the surfaces of which act as a bioaffinity adsorbent for the nucleic acids. The target nucleic acid is isolated from the starting mixture based on molecular size and through the removal of magnetic beads to which the target nucleic acid molecules have been adsorbed. The disclosed method provides a simple, robust and readily automatable means of nucleic acid isolation and purification which produces high quality nucleic acid molecules suitable for: capillary electrophoresis, nucleotide sequencing, reverse transcription cloning the transfection, transduction or microinjection of mammalian cells, gene therapy protocols, the in vitro synthesis of RNA probes, cDNA library construction and PCR amplification.
Owner:WHITEHEAD INST FOR BIOMEDICAL RES
Estimating molecular size distributions in formation fluid samples using a downhole nmr fluid analyzer
ActiveUS20140225607A1Electric/magnetic detection for well-loggingMaterial analysis by using resonanceTime domainNMR - Nuclear magnetic resonance
A method for estimating a property of subsurface material includes extracting a sample of the material using a downhole formation tester and performing a plurality of nuclear magnetic resonance (NMR) measurements on a sensitive volume in the sample where each measurement in the plurality is performed in a static homogeneous magnetic field with a pulsed magnetic field gradient that is different in magnitude from other NMR measurements to provide a waveform signal. The method further includes transforming each received waveform signal from a time domain into a frequency domain and comparing the frequency domain signal to a reference to provide proton chemical-shift information related to a chemical property of one or more molecules in the sample and transforming the frequency domain signals into a complex number domain that quantifies waveform signal amplitude changes to provide one or more diffusion rates with each diffusion rate being associated with a corresponding frequency.
Owner:BAKER HUGHES INC
Natural perfume refining fluid suitable for cigarette fluid of electronic cigarettes and cigarette fluid and preparation method thereof
ActiveCN105029681ARemove ingredients that are unfavorable to smoking tasteEfficient removalTobacco treatmentSolubilityLiquid smoke
The invention discloses natural perfume refining fluid suitable for cigarette fluid of electronic cigarettes and cigarette fluid and a preparation method thereof, and belongs to the technical field of cigarette fluid of electronic cigarettes. Separation and impurity removal are performed on natural perfume such as extract, tincture and absolute oil through a macroporous adsorption resin column chromatography technology, high-boiling-point components such as monosaccharide and disaccharide and macromolecular components such as protein, polysaccharide and pectin in the natural perfume are simultaneously and effectively removed according to the differences of polarities and molecular sizes of all the components in the mixture, the components unfavorable for the smoking mouthfeel of the electronic cigarettes are removed, and the problem that charring flavor is generated due to the fact that the substances are deposited on heating wires is solved; meanwhile, the solubleness of the natural perfume in propylene glycol and glycerinum is improved, therefore, the cigarette fluid of the electronic cigarettes becomes clear and bright, the emission performance of perfume is significantly improved, the sweet greasy feeling is reduced, and the sensory effect is significantly improved.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC
Non-interpenetrating chiral MOF stationary phase, its preparation method and application in enantiomer separation in HPLC
InactiveCN103331151ARaw materials are cheap and easy to getEasy to operateAmino compound purification/separationOther chemical processesEnantiomerStructural formula
The invention relates to a non-interpenetrating chiral MOF (metal organic framework) stationary phase, its preparation method and application in enantiomer separation in HPLC (high-performance liquid chromatography). The stationary phase is a non-interpenetrating chiral three-dimensional porous framework complex with a structural formula as {[ZnL].H2O}n. An asymmetric structural unit {[ZnL].H2O} of the complex is composed of a Zn<2+>, an L ligand and a guest water molecule. The L ligand is -NH- containing chiral pyridine carboxylic acid, its chemical composition is [(N-(4-pyridylmethyl)-L-leucine.HBr)], and its molecular formula is C12H19BrN2O2. Chiral amino acid and 4-pyridylaldehyde are selected as raw materials to synthesize the-NH- containing pyridine carboxylic acid chiral ligand by a one-step process. The ligand and zinc acetate are adopted as raw materials to undergo room temperature diffusion so as to obtain the MOF stationary phase. The material provided in the invention has uniform chiral helical channel, uniform aperture and orifice, and can be used for separation of chiral drugs and other enantiomers. The separation is selectively dependent on the size of a separated enantiomer molecular size, but is not dependent on the functional group of the separated enantiomer. Thus, the non-interpenetrating chiral MOF stationary phase has the characteristics of traditional zeolite molecular sieve separation.
Owner:SHANDONG NORMAL UNIV
Process for preparing bismuth silicate nano powder and use
InactiveCN1821088AImprove performanceExpand the photoresponse rangeSilicon compoundsBismuth compoundsSolventOxygen
The present invention relates to preparation process and application of nanometer Bi12SiO20 powder. The preparation process of nanometer Bi12SiO20 powder includes the first dissolving Bi salt in one solvent to form Bi containing solution of Bi salt concentration 0.5-5 M, adding organic Si compound in the Bi / Si molar ratio of 12 into the Bi containing solution to form homogeneous sol through full stirring, evaporating the sol at normal or negative pressure to obtain dry precursor powder, and final sintering the precursor powder in aerobic condition to obtain the nanometer Bi12SiO20 powder. The present invention realizes the homogeneous mixing of initial materials in molecular size, so as to prepare nanometer Bi12SiO20 powder with high purity and high crystallization degree in relatively low temperature and relatively short time. The nanometer Bi12SiO20 powder has high photocatalytic activity and may be used in photocatalysis to degrade one pollutant.
Owner:SHANGHAI JIAO TONG UNIV
Catalytic cracking process of a stream of hydrocarbons for maximization of light olefins
ActiveUS8933286B2Maximize productionHigh activityCatalytic crackingMolecular sieve catalystsMolecular sizeLow sodium
A process is described for maximization of light olefins, preferably ethylene, by the catalytic cracking of feeds of saturated hydrocarbons, with molecular size in the range from 4 to 6 carbon atoms. The process uses a catalyst based on a zeolite of type ZSM-5 with low sodium content and modified with nickel, with concentration by weight of nickel, expressed in the form of oxide, in the range from 0.1% to 20% relative to the weight of zeolite in the catalyst, and operating conditions that involve a temperature between 400° C. and 650° C. and feed partial pressure between 0.1 and 1.0 MPa, so that the product recovered is rich in light olefins, with ethylene / propylene ratio in the range from 0.25 to 2.00.
Owner:PETROLEO BRASILEIRO SA (PETROBRAS)
Protein Hydrolysate Compositions Stable Under Acidic Conditions
InactiveUS20110097448A1Dough treatmentFatty substance preservation using additivesProtein hydrolysatesMolecular size
The present invention provides protein hydrolysate compositions, processes for making protein hydrolysate compositions, and food products comprising protein hydrolysate compositions. The protein hydrolysate compositions generally comprise a mixture of oligopeptides having an average molecular size of less than about 10,000 Daltons, wherein at least about 60% of the oligopeptides are soluble at a pH of less than about 7.0.
Owner:SOLAE LLC
Solid state membrane channel device for the measurement and characterization of atomic and molecular sized samples
InactiveUS20060292041A1Effectively protect and insulateSimple manufacturing processMaterial analysis by electric/magnetic meansMaterial analysis by optical meansMembrane channelOptoelectronics
The present invention relates to an apparatus for characterization of molecules through measurement of various electrical characteristics. The apparatus has a substrate on which is formed a thin film layer. Further, the apparatus has an insulation layer formed on the thin film layer. The thin film layer has a defined channel bored therethrough, the substrate has an aperture bored therethrough, and the insulation layer has a hole formed therethrough.
Owner:ADVANCED RES
Supported polyoxometallate crystalline catalyst and preparation method thereof
InactiveCN101869851AImprove stabilityNo weatheringOrganic-compounds/hydrides/coordination-complexes catalystsCrystalline materialsMolecular size
The invention belongs to the technical field of chemical materials, and relates to a supported polyoxometallate crystalline catalyst and a preparation method thereof. The crystalline material is formed by using a three-dimensional porous metal-organic frame as a main body with a supported Keggin type polyoxometallate in the pore canal and is prepared by reaction of polyoxometallate with trimesic acid, copper salt and ammonium salt under the condition of hydrothermal self-generated pressure. The component formula is as follows: Hx[(Cu4Cl)3(BTC)8]2[POM].(C4H12N)6.yH2O, wherein BTC is trimesic acid, and POM is Keggin type polyoxometallate. The material has greater specific surface area and can realize that the catalyst and a reactant are contacted in molecular size. At the same time, the material has high stability, simple preparation method, low cost and is easy to recycle.
Owner:NORTHEAST NORMAL UNIVERSITY
Preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles
The invention discloses a preparation method of bonding polyaniline on surfaces of styrene-acrylate copolymer emulsion particles, relating to the field of preparation of styrene-acrylate emulsion which is chemically modified on the surface of conductive polyaniline. The styrene-acrylate emulsion containing a phosphoric acid functional group is firstly prepared by adopting a miniemulsion polymerization method, and then a suspension and dispersion solution which bonds the polyaniline on the surfaces of the styrene-acrylate copolymer emulsion particles is prepared by aniline in-situ oxidation polymerization. The functional emulsion obtained by the method disclosed by the invention has the following advantages: the polyaniline is dispersed in the styrene-acrylate copolymer emulsion in a molecular size; and excellent interface bonding force exists between the polyaniline and a matrix of a styrene-acrylate copolymer due to electrostatic interaction.
Owner:YANGZHOU UNIV
Method of forming a nanogap and method of manufacturing a nano field effect transitor for molecular device and bio-sensor, and molecular device and bio-sensor manufactured using the same
InactiveCN1828849AHighly integratedImprove performanceMaterial nanotechnologyNanostructure manufactureSelf-assembled monolayerThin layer
The present invention relates to a method of forming a nanogap, a method of manufacturing a nano field effect transistor for a molecular device or a bio-sensor, and a fabrication thereof, and more particularly, to a method of forming a high reproductive nanogap using a thin layer with a molecular size or a size which is similar to that of a molecule and a nano field effect transistor manufactured by the method of forming the nanogap. The method of forming a nanogap according to the present invention comprises steps of (a) forming sequentially an insulating layer, a first metal layer and a hard mask on a silicon substrate; (b) etching partially the first metal layer using the mask as an etching mask; (c) forming a self-assembled monolayer (SAM) on a side surface of the first metal layer to form a nanogap on the silicon substrate; (d) depositing metal on the entire structure including the mask to form a second metal layer; (e) removing the metal deposited on the hard mask using a lift-off process by etching the mask formed in step (a) and (f) etching the SAM formed in step (c) to form the nanogap.
Owner:KOREA ADVANCED INST OF SCI & TECH
Spiral wound carbon membrane and preparation method thereof
ActiveUS20110168624A1Reduce manufacturing costEasy to controlMembranesSemi-permeable membranesSpiral woundMolecular size
Disclosed is a spiral wound carbon membrane and preparation method thereof. The spiral wound carbon membrane is composed of one or more integral and windable membrane layers composed of a porous support and carbon materials containing fillers filled in the surface, pores and gaps thereof. The spiral wound carbon membrane has a developed ultramicropore porous structure with superior mechanical strength and toughness, and can be directly used to separate a gas mixture with different molecular sizes or liquid mixture.
Owner:DALIAN UNIV OF TECH +1
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