124 results about "Raman Optical Activity Spectroscopy" patented technology

To provide a composition for chemical mechanical polishing and a polishing method that can effectively suppress contamination of foreign matters during manufacturing and can polish the surface of a semiconductor substrate to a flat surface.SOLUTION: The composition for chemical mechanical polishing according to the present invention contains (A) abrasive grains including silica and (B) a liquid medium, in the (A) component, when the peak intensity of 490 cm-1 derived from a 4-membered ring measured by Raman spectroscopy is x and the peak intensity of 800 cm-1 derived from a multi-membered ring measured by Raman spectroscopy is y, x / y is 4.5 to 6.0, and the (A) component has at least one functional group selected from those represented by the following general formulae (1) to (4), -SO3-M+ (1), -COO-M+ (2), -NR1R2 (3), -N+R1R2R3M- (4).SELECTED DRAWING: None

A system and method for determining charge variants in monoclonal antibodies using raman spectroscopy is disclosed.

An optical measurement system, the optical measurement system comprises optics, wherein the optics include a collection path and an illumination path and an objective lens. The optics is configured to acquire Raman spectrums of one or more structural elements located at a measurement site of the sample while being set-up to apply one or more optics parameters that comprise an illumination angle out of a set of multiple illumination angles that correspond to a numerical aperture of the objective lens. Each of the one or more structural elements has a dimension that ranges between one tenth of nanometer to one hundred microns; an optical spectrometer; a Raman detector that is downstream to the optical spectrometer; and a control unit that is configured to determine an expected radiation pattern to be detected by the Raman detector when the optics are set-up to apply the one or more optics parameters.

Provided is an optical filter capable of reducing the dependency on the angle of light incidence. An optical filter 1 includes a hydrogenated silicon-containing film 4, wherein in a Raman spectrum of the hydrogenated silicon-containing film 4 measured by Raman spectroscopy a ratio (SiH / SiH2) obtained from a ratio between an area of a peak derived from SiH and an area of a peak derived from SiH2 is 0.7 or more.

The invention discloses a method for rapidly detecting a liquid phase diffusion coefficient of an analyte based on surface enhanced Raman spectroscopy of a microchannel, which ingeniously combines the characteristics of nondestructive, non-contact, label-free, rapid and sensitive laser confocal Raman spectroscopy with the characteristics of trace, high-throughput analysis and self-injection of a microfluidic technology. Wide application prospects are realized.

The invention discloses a method for measuring the number of layers of a two-dimensional material by utilizing Goos-Haenchen displacement, which comprises the following steps: establishing a Goos-Haenchen displacement theoretical database when a horizontal polarized light beam is reflected on the surfaces of the two-dimensional materials with different layers at different incident angles according to a theoretical relation model of the two-dimensional materials with different layers and the Goos-Haenchen displacement; enabling the horizontal polarization incident light beam to be incident to the surface of the measured two-dimensional material at a certain incident angle; measuring Goos-Hanchen shift generated by the reflected light beam under the condition; sequentially changing the incident angles to obtain a group of Goos-Hanchen shift measurement data under different incident angles; and comparing and analyzing the measured data with theoretical data in a Goos-Hanchen shift theory database to obtain the number of layers of the measured two-dimensional material. Compared with a traditional two-dimensional material layer number measuring method, such as a Raman spectrum method, an atomic force microscopy method and a transmission electron microscope method, the method is easy to operate and high in measuring efficiency, does not damage a sample and has a good application prospect.

A positive electrode active material, a method of manufacturing the same, and a rechargeable lithium battery are provided. The positive electrode active material includes a first particle including a compound represented by Chemical Formula 1 and having a first average particle diameter. A ratio (ID / IG) of an intensity (ID) of a D peak at a wavenumber of about 1340 + / -10 cm <-1 > in a Raman spectrum obtained from Raman spectroscopy to an intensity (IG) of a G peak at a wavenumber of about 1590 + / -10 cm <-1 > in a Raman spectrum obtained from Raman spectroscopy is in a range of about 0.5 to about 1.5. Chemical formula 1Lia1Fex1B1y1PO4

The invention discloses a qualitative and quantitative detection method for graphene in a fiber fabric based on microwave assistance, and relates to the technical field of nano material analysis and detection. The qualitative and quantitative detection method comprises the following steps: adding a solvent and a dispersing agent into a fiber fabric sample, carrying out microwave-assisted dissolution treatment, adding the obtained mixture into a microwave-vortex ultrasonic-centrifugal integrated treatment system, and carrying out vortex dispersion, ultrasonic stripping and gradient centrifugal separation to obtain enriched graphene precipitate; the graphene precipitate is uniformly mixed with an internal standard substance silicon carbide, Raman spectroscopy is adopted for testing, qualitative analysis is carried out by analyzing the characteristics of a G peak and a 2D peak, and quantitative calculation is carried out on graphene according to the intensity ratio of a D peak to a silicon carbide characteristic peak. The method is efficient and accurate, and effectively solves the problems of low treatment efficiency, high cost, environmental pollution, easy damage of graphene structure and insufficient quantitative analysis precision of a traditional method.

A liquid (2) measurement chamber extension (10) for spectrophotometric characterization of a liquid (2) in a polymer container (3) by a NIR spectrophotometer (1) or a Raman spectrophotometer (1), the measurement chamber extension (10) comprising an adapter plate (11) having an adapter opening (11'); a container holder (7); and an optical element (5) selected from a mirror and a waveguide; the adapter (11) is configured to cover a measurement chamber (20) of the NIR spectrophotometer (1) or the Raman spectrophotometer (1) in a light-tight manner, the adapter opening (11') surrounding a measurement window of the NIR spectrophotometer (1) or the Raman spectrophotometer (1) to allow the NIR spectrophotometer (1) or the Raman spectrophotometer (1) to measure the spectrophotometric characterization of the liquid (2) in the polymer container (3). a measurement chamber extension (10) configured to provide exposure of the liquid (2) to a measurement light beam emitted from a measurement chamber (20) of a spectrophotometer (1) through the measurement window; the container holder (7) configured to bring the optical element (5) in close proximity to the polymer container (3) containing the liquid (2) to provide loss-free transmission or transflective of the measurement light beam from the optical element (5) to a detector of the NIR spectrophotometer (1) or the Raman spectrophotometer (1), the container holder (7) comprising a clamp (13) configured to hold a tubular section (3a) of the polymer container (3) to enable reproducible measurement conditions.

To provide a novel evaluation method that can evaluate the thickness of a heteroepitaxial layer of a heteroepitaxial substrate without destruction in a short time in the wide range regardless of whether light can transmit the heteroepitaxial substrate.SOLUTION: An evaluation method for a heteroepitaxial substrate including a heteroepitaxial layer on a surface of a substrate includes irradiating the heteroepitaxial substrate with laser light, acquiring Raman spectrum by Raman spectroscopy, obtaining Raman signal intensity (ISub) of the substrate and Raman signal intensity (IEpi) of the heteroepitaxial layer from the Raman spectrum, and evaluating the thickness of the heteroepitaxial layer on the basis of the ISub and the IEpi.SELECTED DRAWING: Figure 1

Provided are a carbon support, a metal-supported catalyst, and an electrode that each improve power generation performance of a fuel cell under low humidity operating conditions, and a fuel cell that improves power generation performance under low humidity operating conditions. The present invention relates to a carbon support for supporting catalyst metal particles, the carbon support having: an oxygen content of 2.6 wt% or more, and having a carbon structure exhibiting one or more of the following characteristics (i) to (v) in a Raman spectrum obtained by Raman spectroscopy: (i) one or more of 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, the half-peak width at half maximum of 37 cm <-1 > or less in a G band having a peak top near the Raman shift of 580 cm <-1 >; (ii) the half-peak width at half maximum of a D band having a peak top in the vicinity of Raman shift of 1,340 cm <-1 > is 38 cm <-1 > or less; (iii) the half-peak width at half maximum of a 2D band having a peak top near the Raman shift of 2,700 cm <-1 > is 57 cm <-1 > or less; (iv) the ratio of the strength of the D band to the strength of the G band is 1.6 or more; and (v) the ratio of the intensity of the 2D band to the intensity of the G band is 0.3 or more.

Monitoring device, system and method for detecting an element in a fluid. The monitoring device (1) comprises a particle sensor (139), a VOC sensor (132) that includes a compartment (131), a lens (133) and a laser emitter (135) and a concave mirror (134) optically coupled with the lens (133). The particle sensor (139) electrostatically filters particles in a fluid sample (101b), provides a filtered fluid sample (101a) to the compartment (131), and provides particle data in the fluid sample. The concave mirror (134) concentrates laser light refracted by the filtered fluid sample (101a) in the compartment (131) and directs said concentrated laser light to a measurement area (132a) of the VOC sensor (132). The VOC sensor (132) collects spectrophotometric data (102a) based on Raman spectrography on the filtered fluid sample (101a) from the compartment (131).

Provided is a chemically strengthened crystallized glass which has excellent moisture resistance.　With respect to a Raman spectrum of the chemically strengthened crystallized glass obtained by Raman spectrometry, when A1 is the peak area of 380-440 cm-1 and A2 is and the peak area of 520-570 cm-1, the maximum value of A2 / A1 in the depth range of 0-3 µm from the surface is 2.2 or less. The chemically strengthened crystallized glass contains Li2Si2O5 crystals.

The invention discloses a system and method for satellite communication. Aspects of wireless communications are described including a radio frequency (RF) amplifier chip configured for transmitting or receiving data, the chip including a first substrate including a first material and a second substrate including a second material different from the first material. The first substrate and the second substrate may be lattice matched such that an interfacial region between the first substrate and the second substrate exhibits an sp3 carbon peak at about 1332 cm <-1 >, having a full width at half maximum of no greater than 5.0 cm <-1 >, as measured by Raman spectroscopy. In some aspects, the first substrate and the second substrate allow the chip to transmit or receive data at a transmission rate of at least 500 megabits per second and a frequency of at least 8 GHz. In some aspects, the RF amplifier chip is part of a satellite transmitter.

A Raman spectroscopy method for determining the concentrations of at least one target component enclosed in a medium containing a given combination of multiple components, providing a reference spectrum of the component for each component of the medium; based on Raman peaks included in the reference spectra, identifying Raman peaks that occur at less than a predetermined minimum spectral distance from each other as interfering peaks; determining a component spectrum for each component by eliminating each Raman peak included in the reference spectrum of the respective component that was identified as an interfering peak; based on the component spectra, determining synthetic spectra of samples of the medium that include different concentrations of the components;and based on the synthetic spectra, determining and providing a model for determining the concentrations of each component based on measured spectra of samples of the medium.;

To provide handheld biological analyzers and related biological analytics methods based on Raman spectroscopy.SOLUTION: A biological classification model configuration is loaded into a computer memory of a handheld biological analyzer. The biological classification model configuration includes a biological classification model configured to receive a Raman-based spectra dataset defining a biological product sample as scanned by a scanner. A spectral preprocessing algorithm is executed to reduce a spectral variance of the Raman-based spectra dataset. The biological classification model identifies a biological product type based on the Raman-based spectra dataset and further based on a classification component selected to reduce at least one of (1) a Q-residual error or (2) a summary-of-fit value of the biological classification model. The biological classification model configuration is transferrable to and loadable on other configurable handheld biological analyzers.SELECTED DRAWING: Figure 1

A method of Raman spectroscopy for determining concentrations of at least one target component included in a medium including a given combination of multiple components includes: for each component of the medium, providing a reference spectrum of the component; based on Raman peaks included in the reference spectra, identifying Raman peaks that occur within less than a predetermined minimum spectral distance from each other as disturbing peaks; for each component, determining a component spectrum by eliminating each Raman peak included in the reference spectrum of the respective component identified as a disturbing peak; based on the component spectra, determining synthetic spectra of samples of the medium including different concentrations of the components; and based on the synthetic spectra, determining and providing a model for determining concentrations of each target component based on measured spectra of samples of the medium.

This invention discloses an endoscopic device for thyroid surgery based on fluorescence lifetime and Raman spectroscopy imaging, comprising: a light source assembly, an endoscope probe, a fluorescence lifetime image signal acquisition module, a Raman spectroscopy signal acquisition module, and a color image acquisition module; a host unit, including a control unit and an image processing unit; and a display for displaying an image fused with the Raman spectroscopy signal, the fluorescence lifetime image signal of cancerous tissue, and the color image, as well as an image fused with the Raman spectroscopy signal and the color image. This invention utilizes Raman spectroscopy to visualize the autofluorescence of the parathyroid glands, enabling precise localization of the parathyroid glands. Raman spectroscopy can also locate regional lymph nodes and adipose tissue in the central thyroid region, and combined with fluorescence lifetime imaging, it can provide the conformational state of fluorophores in the neck tissues, marking cancerous tissues and providing real-time optical auxiliary localization for differentiating various anatomical tissues during thyroid endoscopic surgery.

The invention discloses an optical fiber sensor system for in-situ high-temperature Raman spectroscopy. The system comprises an excitation source, a spectrograph and a Raman probe. The Raman probe includes at least one optical fiber coupled to an excitation source and to a spectrometer. The at least one optical fiber transmits laser excitation from the excitation source to the sample and collects light scattered by the sample for analysis by the spectrometer. An outer lens arrangement positioned at a distal end of the at least one optical fiber of the Raman probe optically couples the at least one optical fiber to the sample and physically separates the at least one optical fiber from the sample during sampling. The spectrometer performs Raman spectroscopy of the sample based on the light collected by the at least one optical fiber.

A method (100) and a system (400) for determining the quality of a battery cell are disclosed. The method (100) includes the steps of: receiving (102), by a processor (502) of a control unit (406), from a spectrometer (402), an input Raman spectrum of the battery cell representing intensity values ​​for a wavelength range; comparing (104), by the processor (502), at least one feature extracted from the input Raman spectra with at least one model feature of a quality determination module; and, based on the comparison, determining (106), by the processor (502), whether the integrity state of the battery cell is faulty or fault-free. The system (400) includes a spectrometer (402) and a control unit (406) communicatively connected to the spectrometer (402).

A conductive composition includes a binding resin and a conductive polymer, wherein the conductive polymer has a quinoid structure and a benzoid structure, and wherein a ratio of a half-width value of a peak intensity corresponding to the benzoid structure to a half width of a peak intensity corresponding to the quinoid structure in Raman spectra obtained by Raman spectroscopy is 0.5 to 12.

To provide a catalysis having high initial activity and durability with respect to an oxygen reduction reaction and an oxygen evolution reaction.SOLUTION: A catalysis contains a carbon carrier and a transit metal containing catalysis which is carried by the carbon carrier. The catalysis indicates a D1 band in the vicinity of Raman shift 1,350 cm-1 in Raman spectrum, indicates a G band in the vicinity of Raman shift 1,590 cm-1 and indicates a peak of a specific boron atom of bond energy 192.0±0.3 eV that is obtained by performing peak separation on B1s spectrum in XPS spectrum. The catalysis has the following characteristics: (p1) D1-FWHM according to the Raman spectroscopy is 112 cm-1 or less and a specific B / C% based on XPS is 0.7% or more; (p2) D1-FWHM is 52 cm-1 or more to 112 cm-1 or less and the specific B / C% is 0.1% or more; and (p3) an ID1 / IG ratio according to the Raman spectroscopy is 1.06 or more and the specific B / C% is 0.7% or more; or (p4) an ID1 / IG ratio is 1.06 or more to 1.99 or less and the specific B / C% is 0.1% or more.SELECTED DRAWING: None

To provide a structural component with a highly durable protective film against plasma. [Solution] The structural member 10 comprises a base material 100 and a protective film 200 covering the surface 110 of the base material 100. The protective film 200 mainly contains yttria, and in the Raman spectrum of the protective film 200 obtained by Raman spectroscopy, 370 cm⁻¹ -1 The half-width of the peak at nearby wavenumbers is 23 cm. -1 That's all.

Anode material, and battery. Anode material includes graphite and carbon layer located on at least part of surface of graphite. Particle surface and particle section of anode material are respectively tested by Raman spectroscopy, peak area ratio of D characteristic peak within range of 1300 cm−1 to 1350 cm−1 to G characteristic peak within range of 1500 cm−1 to 1580 cm-1 is ID / Ig, ratio of ID / IG measured on the particle surface is A, and ratio of ID / IG measured on particle section is B, and 1.22<A−B≤2.10. Anode material improves lithium-ion transport kinetics, initial Coulombic efficiency, and cycle performance.

According to an embodiment, an electrode is provided which includes an active material-containing layer, and the active material-containing layer contains an active material, a first conductive agent, and a second conductive agent. The integrated intensity I D of the D band of the first conductive agent in the Raman spectrum G and the integrated intensity I D of the G band G has a ratio I D / I G of 0.5 < I D / I G < 2, and for the second conductive agent, 0 < I D / I G < 0.5. In the constituent material mapping image obtained by Raman spectroscopy for the active material-containing layer, the occupied area S1 of the first conductive agent relative to the occupied area Sa of the active material satisfies 0.1 < S1 / Sa < 1.0, the occupied area S2 of the second conductive agent relative to the occupied area Sa of the active material satisfies 0.8 < S2 / Sa < 10, the distance between the centers of gravity R1 of the first conductive agent relative to the distance between the centers of gravity Ra of the active material satisfies 1.0 < R1 / Ra < 1.5, the distance between the centers of gravity R2 of the second conductive agent relative to the distance between the centers of gravity Ra of the active material satisfies 0.5 < R2 / Ra < 1.0, and the relationship R1 > R2 > R1-2 is satisfied for R1, R2, and the distance between the centers of gravity R1-2 between the first conductive agent and the second conductive agent.

To provide a carbon carrier which achieves effective maintenance of performance of a metal-supported catalyst, and to provide a metal-supported catalyst, an electrode and a battery in which performance is effectively maintained.SOLUTION: Wherein a volume of pores having pore diameters in a range of more than 77K and 0nm or less, which is obtained by a DFT method from a nitrogen-adsorption isotherm at a temperature of 70nm, is 0. 70cm3 / g or less, A volume of pores having pore diameters less than 5nm is 0. 31cm3 / g or more, a true concentration obtained by a constant volume expansion method is 1. 9g / cm3 or more, and a half width at half maximum of a D band having a peak top near a Raman shift 1340cm of - 1 is 50cm of - 1 or less.SELECTED DRAWING: None

The present invention relates to an apparatus and method for non-invasive in vivo measurement, by Raman spectroscopy, of glucose present in interstitial fluid in the skin of a subject. The apparatus c

A negative electrode 6 according to the present disclosure comprises a long negative electrode mixture layer 6b. The negative electrode mixture layer 6b contains graphite as a negative electrode active material. The negative electrode mixture layer 6b includes a first end region 61 including a first end 64a in the width direction, a second end region 62 including a second end 64b in the width direction, and a central region 63 including a center 64c in the width direction. The Raman spectrum ID / IG ratio of the first end region 61 is greater than the Raman spectrum ID / IG ratio of the central region 63. The "Raman spectrum ID / IG ratio" as used herein is the ratio of a peak intensity ID of a D band appearing in the vicinity of Raman shift 1348 cm-1 to a peak intensity IG of a G band appearing in the vicinity of Raman shift 1575 cm-1 in a Raman spectrum that is obtained by analyzing the surface of the negative electrode mixture layer by Raman spectroscopy.

Provided is a secondary battery with which excellent battery characteristics can be obtained. This secondary battery is provided with: a positive electrode; a negative electrode including a negative electrode active material, a negative electrode binder, and a negative electrode conductive agent; and an electrolyte solution. The negative electrode active material contains a silicon-containing material, the negative electrode binder contains an N-vinyl acetamide polymer, and the negative electrode conductive agent contains a fibrous carbon material. In analysis of the negative electrode conductive agent using Raman spectroscopy, an absorption peak is detected within a Raman shift range of 120 cm-1 to 300 cm-1, and the half-value width of the absorption peak is 10 cm-1 or more.

In this specification, a method for determining virus particles having encapsulated nucleic acid in an aqueous sample using Raman spectroscopy is reported, which includes preparing a sample and irradiating the sample with a light source, measuring the total intensity of Raman scattered light for each of a first plurality of preselected wavenumbers and / or wavenumber ranges to obtain a first data set regarding the sample, performing a first set of mathematical data processing steps on the first data set, and determining virus particles having encapsulated nucleic acid in the sample based on the output of the first set of mathematical data processing steps, wherein the first set of mathematical data processing steps includes principal component analysis and the determining step is based on a first principal component.