222 results about "Fourier transform infrared spectroscopy" patented technology

Ta₂O₅ and Al₂O₃ thin films were fabricated by pulsed plasma-enhanced chemical vapor deposition (PECVD) with simultaneous delivery of O₂ and the metal precursor. By appropriately controlling the gas-phase environment self-limiting deposition at controllable rates (˜1 Å/pulse) was obtained. The process was insensitive to substrate temperature, with a constant deposition rate observed from 90-350° C. As-deposited Ta₂O₅ films under these conditions displayed good dielectric properties. Performance improvements correlate strongly with film density and composition as measured by spectroscopic ellipsometry and Fourier transform infrared spectroscopy. Pulsed PECVD eliminates the need for gas actuation and inert purge steps required by atomic layer deposition.

The presence of large amounts of non-diamond carbon in detonation synthesized nanodiamond (ND) severely limits applications of this exciting nanomaterial. An environmentally-friendly process is disclosed to selectively remove sp²-bonded carbon from ND. The content of up to 96% of sp³-bonded carbon in the oxidized samples is comparable to that found in microcrystalline diamond and is unprecedented for ND powders. Transmission electron microscopy and Fourier transform infrared spectroscopy studies show high purity 5-nm ND particles covered by oxygen-containing surface functional groups. The surface functionalization can be controlled by subsequent treatments. In contrast to current purification techniques, the disclosed process does not require the use of toxic or aggressive chemicals, catalysts or inhibitors and opens avenues for numerous new applications of nanodiamond.

The present invention generally relates to semiconductor processing, and in particular to methods and systems for analyzing photolithographic reticle defects that include detecting soft defects on a reticle and analyzing the material composition of the defects for a particular chemical signature. Specifically, the present invention scans and images a soft defect via an optical inspection scan of a reticle, mills the defect using a Focused Ion Beam, and analyzes the defect for signatures using Electron Spectroscopy for Chemical Analysis and/or Fourier Transform Infrared Spectroscopy. The present invention thus provides for real-time analysis of the chemical composition of a soft defect on a reticle without the need for a defect identification navigation system. According to an aspect of the present invention, reticle defects can be monitored without removal of a pellicle, thus facilitating increased throughput and decreased cost in reticle repair and/or cleaning. According to another aspect of the invention, signatures occurring in trace amounts can be removed via employing a Focused Ion Beam in a non-reactive gas environment.

The present invention provides pharmaceutically acceptable salts having local anesthetic and anti-inflammatory activities. The preferred pharmaceutically acceptable salt is a diclofenac salt of lidocaine. Diclofenac is a non-steroidal anti-inflammatory drug (“NSAID”). Lidocaine is a local anesthetic. Other NSAID (except the salicylic acid derivatives of NSAID) can be used to replace diclofenac and/or other local anesthetics can be used to replace lidocaine. The pharmaceutically acceptable salts are crystalline compounds, which are distinctively different from either the NSAID alone or the local anesthetic alone, as indicated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), High Performance Liquid Chromatography (HPLC) and Fourier-Transformed Infrared Spectroscopy (FTIR) analyses. These pharmaceutically acceptable salts are suitable for use in topical treatment or parenteral injection to treat patients with localized pain, including muscle pain, joint pain, pain associated with herpes infection, and wound pain (such as surgical wound, burn wound etc.).

The invention discloses a method for synthesizing a novel tetracyclic diterpene compound from stevioside, which is cost-efficient and feasible. The compound is represented by a general formula (I), wherein the definitions of R1, R2, X, Y are shown in the specification. The invention discloses a potential application value of the compound in the aspects of anti-tumor and anti-inflammation and a detailed preparation method of the compound as well as physical data of Fourier transform infrared spectroscopy (FT-IR), hydrogen nuclear magnetic resonance spectroscopy (1 HNMR), mass spectrometry (MS) and the like.

The invention belongs to the technical field of analysis equipment and discloses an online solid waste incineration treatment analysis system. Gases such as NO, NO2, CO, CO2, HCL, SO2 and O2 in exhausted flue gas are measured after refuse combustion. According to the online monitoring system, solid waste incineration flue gas is subjected to sampling analysis along a sampling probe, an electric heating type heat tracing sampling pipe, a sampling pump, a pretreatment unit and a Fourier transform infrared spectroscopy (FTIR) analyzer sequentially. In order to guarantee reliable and stable operation of the system, the monitoring system also comprises an analyzer purging protection unit, a probe blowback unit and a calibration unit. In the gas analysis process, the temperature is high in the whole process, the component loss is low, the measurement accuracy is high, and the system equipment can be prevented from being subjected to condensate corrosion by acid gases under unforeseen circumstances due to the protection unit. Moreover, the FTIR Fourier external analyzer has extremely high expansion capability, and analysis components can be increased according to the requirement.

The invention discloses a method for evaluating the running status of a composite insulator in the technical field of monitoring for composite insulators of transmission lines. The method comprises the following steps of: acquiring a numerical value of each micro parameter of the composite insulator; determining test results of a scanning electron microscope (SEM), a Fourier transform infrared spectroscopy (FTIR) and thermally stimulated current (TSC) respectively; optimizing weight values corresponding to the test results by utilizing a back propagation (BP) neural network algorithm; and calculating the running status of the composite insulator. Results obtained by action caused by changes in a plurality of items of micro performance are combined to comprehensively evaluate the running status of the composite insulator, so that the aim of accurately evaluating and mastering the running status of the insulator is fulfilled.

The invention discloses a method for measuring purity values and uncertainty degrees of standard substances of phenol and hydroquinone. The method comprises the following steps: screening raw materials for purity qualification; performing qualitative confirmation on to-be-measured samples by combining a gas chromatography-mass spectrometry with a Fourier transform infrared spectroscopy; measuring the purity of the to-be-measured samples by combining three methods different in principle including a GC method, an HPLC method and a DSC method; sub-packaging the to-be-measured samples; checking uniformity and stability; calculating to obtain the uncertainty degree caused by purity measurement; calculating the uncertainty degree caused by the uniformity and the stability according to step four; and synthesizing all the uncertainty degrees to obtain a total uncertainty degree. The method provided by the invention has accurate qualification, reduces system error, adopts a strict statistical data processing method and a comprehensive uncertainty degree evaluation method, ensures accuracy, stability and traceability of measured values, and obtains high-purity standard substances of phenol and hydroquinone.

The invention discloses a fluorescent probe for dopamine determination. The fluorescent probe for the dopamine determination is characterized in that with L-arginine as a carbon source, one-step synthesis of carbon quantum dots with strong fluorescence emission is achieved through a hydrothermal method; the carbon quantum dots are characterized by such things as ultraviolet absorption spectrum (UV), fluorescence spectrum (PL), fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS), and fluorescent properties of the synthetic carbon quantum dots and the fact that the surface of the same contains a large number of functional groups such as hydroxyl groups and carbonyl groups are confirmed; according to the fluorescence quenching effect of dopamine on C-dots(carbon dots), the C-dots are used as a fluorescent probe for detecting the dopamine, and experimental conditions such as pH (hydrogen ion concentration), carbon point usage, reaction temperature andtime are optimized; a quantitative detection method for the dopamine is established under the optimal detection conditions, and the detection limit is as low as 93 nanometers, which proves that the method can be used for sensitive detection of dopamine in actual samples.

The invention relates to a pneumatic tire having excellent mechanical properties by using a rubber composition containing a polybutadiene rubber having a high cis-1,4 bond content, a low vinyl bond content and proper number average molecular weight and molecular weight distribution, and more particularly to a pneumatic tire characterized in that a rubber composition including a polybutadiene with a cis-1,4 bond content of not less than 99.0% and a vinyl bond content of not more than 0.3% as measured by a Fourier transform infrared spectroscopy is used in any one of tire members.

An interferometer for Fourier transform infrared spectroscopy includes a fixed assembly including a housing, a beam splitter, and a mirror fixedly positioned relative to each other. A movable assembly includes a housing, a mirror, and a motor coil, fixedly positioned relative to each other. A first flat spring has an opening for providing an unobstructed optical path of radiation therethrough. A first end of the first flat spring is secured to the fixed assembly and a second end of the first flat spring is secured to the movable assembly for providing movement of the movable assembly relative to the fixed assembly via the first flat spring. An optical relationship between the beam splitter, the mirror of the fixed assembly, and the mirror of the movable assembly is maintained independent of a distance between the movable assembly and the fixed assembly.

The invention relates to a method for automatically eliminating vapor interference in Fourier transform infrared spectroscopy gas detection. The method is characterized by comprising the steps of monitoring the vapor concentration in a gas cell in real time from a specified waveband by adopting a tunable laser absorption spectrum technology, automatically introducing pure nitrogen into to-be-detected gas in the gas cell according to the vapor concentration, enabling the vapor concentration of mixed gas in the gas cell to reach a predetermined concentration value, subtracting a vapor reference spectrum under the predetermined concentration acquired in the preliminary measurement by utilizing a subtraction method, eliminating the vapor interference, calculating the concentration of each component in the to-be-detected gas diluted by nitrogen, calculating a dilution ratio of the to-be-detected gas caused by nitrogen according to the vapor concentration values of the gas in the gas cell before and after pure nitrogen is introduced, and calculating the concentration of each component in the to-be-detected gas before being diluted. By adopting the method, the capability of the Fourier transform infrared spectroscopy technology for automatically and rapidly eliminating the vapor interference in the gas detection can be realized, and the unknown polluted gas can be rapidly detected.

A system and a method are provided for calculating the cetane number, pour point, cloud point, aniline point, aromaticity, and/or octane number of a crude oil and its fractions from the density and Fourier transform infrared spectroscopy (FTIR) of a sample of the crude oil.

Thermoplastic polyolefin blends with a good stiffness/impact balance, as well as enhanced surface durability, contain semi-crystalline polypropylene resin component, a propylene-based elastomer component, and an optional but preferred styrene-based elastomer component. The propylene-based elastomer (PBE) is characterized as having at least one of a) a plurality of identifying band positions at 998 cm⁻¹, 974 cm⁻¹, and 733 cm⁻¹, as measured by Fourier Transform Infrared Spectroscopy (FTIR); or one or more glass transition temperatures (Tg) from about −15° C. to −35° C., as measured by Differential Scanning Calorimetry. The surface of articles made from such a thermoplastic blend shows increased scratch resistance and a decrease in stress whitening.

The invention provides a cyclodextrin supramolecular polymer/Fe3O4 magnetic nanoparticle complex. The complex is prepared by the following steps: firstly, crosslinking beta-cyclodextrin with pyromellitic dianhydride to synthesize a cyclodextrin supramolecular polymer (beta-CDSP); coprecipitating the beta-CDSP and FeCl3.6H2O and FeCl2.4H2O under an alkaline condition by a one-pot method, so as to obtain the complex. An X-ray diffraction (XRD) method, a transmission electron microscope (TEM) method, a Fourier transform infrared spectroscopy (FTIR) method and a thermogravimetric analysis (TGA) method are applied for characterizing to verify that the beta-CDSP is grafted to Fe3O4 magnetic nanoparticles. The complex has the advantages of low synthesis cost, environment friendliness, no toxicity, abundant hydroxide radicals, free carboxyl and better magnetic properties, and can be used as an adsorption material for adsorption cation type triphenylmethane dye pollutants; malachite green serves as a model molecule for study on adsorption properties, and results show that the complex has a good adsorption effect on the malachite green and has a potential application prospect on the aspect of the adsorption material of environmental pollutants.

A spectrometer configurable for field analyses of chemical properties of a material is provided. The spectrometer includes: at least one sensor adapted for providing Fourier transform infrared spectroscopy (FTIR) surveillance and at least another sensor for providing Raman spectroscopy surveillance. The spectrometer can be provided with a user accessible instruction set for modifying a sampling configuration of the spectrometer. A method of determining the most likely composition of a sample by at least two technologies using the spectrometer is also provided.

This invention is concerned with a butadiene-based polymer having a high cis-1,4 bond content, a low vinyl bond content and a molecular weight distribution of a specified range, and more particularly a butadiene-based polymer having a 1,3-butadiene monomer unit, characterized in that a cis-1,4 bond content and a vinyl bond content in the 1,3-butadiene monomer unit as measured by a Fourier transform infrared spectroscopy (FT-IR) is not less than 98.0% and not more than 0.3%, respectively, and a ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) is 1.6-3.5.

This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I):

(wherein a is a mountain peak value around 1130 cm⁻¹ in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm⁻¹, and c is a valley peak value around 911 cm⁻¹, and d is a valley peak value around 736 cm⁻¹) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)×100≧99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)×100≦0.

Perfluoroelastomers curable by the peroxidative route with a glass transition temperature below -10°C and an amount of -COF end groups in the polymer below the sensitivity limit of the method described in this invention using Fourier transform IR spectroscopy.

A polymer-brush-based, surface-modification strategy for friction and wear reduction in hard contact under boundary-lubrication conditions is proposed, specifically for a non-aqueous environment. Surface-initiated Atom Transfer Radical Polymerisation (SI-ATRP) was employed for the synthesis of three different oil-compatible, hydrophobic polymer brushes based on alkyl methacrylates. This study presents polymerisation kinetics, chemical characterization by means of Fourier transform infrared spectroscopy (FTIR) and surface morphologies observed in atomic force microscopy (AFM). The lubrication properties of the anchored polymers were evaluated macroscopically by means of ball-on-disk methods and on the nanonewton scale by lateral force microscopy (AFM/LFM) and showed significant reduction in friction up to contact pressures as high as 460 MPa. The frictional response of surface-grafted polymers is shown to depend strongly on the compatibility of the polymer with the chosen lubricating fluid. Their good tribological performances have also been proven with watchmaking lubricants. These results do make the prevent invention a suitable candidate for a watchmaking application (such as at the balance pivot or the escapement) in order to increase the efficiency and reliability of the movements.

The invention discloses a method for analyzing glass fiber in paper, which sequentially comprises the steps of: burning out a paper sample; putting into a muffle furnace to calcine; naturally cooling into room temperature in the muffle furnace after calcining; putting the sample into a micro-light microscope to observe; judging whether the other fibers are existed; if the other fibers are not existed, soaking and washing with concentrated hydrochloric acid or concentrated nitric acid, washing to be clean with deionized water, drying, cooling, and weighing; and if the other fibers are existed, soaking and washing with the concentrated hydrochloric acid or the concentrated nitric acid, washing to be clean with the deionized water, drying, and analyzing with the fourier transform infrared spectroscopy to test the content of the glass fiber.

The invention relates to black-bone chicken peptide and iron chelate. The black-bone chicken peptide and iron chelate is made by adding ascorbic acid in black-bone chicken peptide solution and chelating the black-bone chicken peptide solution and ferrous salt at the constant temperature under pH 3-6. The chelate is subjected to structural identification by Fourier transform infrared spectroscopy. Ferrous ions in the black-bone chicken peptide, and iron chelate and NH2+ and -COO- in polypeptides form coordinate bonds. Therefore, the black-bone chicken peptide and iron chelate is novel peptide and iron chelate. The materials of the black-bone chicken peptide and iron chelate are safe and nontoxic. No harmful substances in the preparation process occur. The process is simple, and the cost is low. The black-bone chicken peptide and iron chelate is applicable to preparation of functional foods and health foods such as iron supplements and the like.

A device and method of use are provided for measuring the concentration of fatty acid methyl ester (FAME) in jet fuel to a limit of detection of 1 ppm. The device measures concentration of FAME in jet fuel via Fourier transform infrared spectroscopy (FTIR) with a spectral resolution of 1 cm⁻¹. The device can use an infrared light emitting diode (IR LED) and mercury cadmium telluride (MCT) detector in which the spectral output of the IR LED and the spectral response of the MCT detector is centered on the spectral absorbance of an ester bond, a defining spectral characteristic of FAME. Other IR LEDs with differing spectral outputs can be used to measure the presence and/or concentration of different analytes in different fluids.