23 results about "Confocal raman spectroscopy" patented technology

The invention discloses a photoacoustic spectrum-confocal Raman spectrum multi-view-field high-dimensional imaging method and a photoacoustic spectrum-confocal Raman spectrum multi-view-field high-dimensional imaging device. Nanosecond pulse laser with adjustable wavelength is generated through a continuous spectrum nanosecond pulser and a narrow-band spectrum tuning module and cooperates with a microscopic detection module, a depth imaging module, a galvanometer system and an electric displacement table to obtain spatial three-dimensional data, a photoacoustic spectrum and a Raman spectrum under multiple view fields; shallow photoacoustic spectrum-Raman spectrum tomography and deep three-dimensional photoacoustic imaging are realized; correcting a photoacoustic spectrum quantitative error by using a spectrum decoupling algorithm, and fusing the multi-view-field data to generate multi-view-field high-dimensional photoacoustic spectrum-Raman spectrum data; high-dimensional data features are extracted based on a 3D convolution instance segmentation network, and quantitative analysis and spatial distribution visualization of blood oxygen, inflammatory factors and the like are achieved. According to the method, the limitation that substances are difficult to analyze in photoacoustic imaging is overcome, the contradiction between the imaging resolution and the penetration depth is solved, and an accurate analysis means is provided for diagnosis of diseases such as knee osteoarthritis and sepsis.

A Raman spectroscopy apparatus comprises an imaging optical system that transmits light from an object to a spectrograph along an optical path. A scanning device intersects, and is movable with respect to, the optical path. Light is directed onto the scanning device to illuminate the object at a plurality of illumination points. The imaging optical system transmits Raman scattered light emitted from the object at the illumination points to an intermediate image plane, the scanning device being located at the intermediate image plane, and transmits the Raman scattered light from the intermediate image plane to the spectrograph. In comparison with conventional confocal Raman spectroscopy, the apparatus can perform Raman analysis of a sample more quickly, and in comparison with conventional line scan Raman spectroscopy the apparatus can perform Raman analysis more accurately.

The application relates to a high-sensitivity confocal Raman spectrum fast measurement method and device based on two-dimensional MEMS micromirror scanning, and belongs to the technical field of microscopic spectrum imaging. The method utilizes two pieces of two-dimensional MEMS micromirrors to realize light beam transverse scanning, omits scanning lenses and tube lenses, utilizes a dichroic light splitting system to realize lossless separation of reflected light and Raman scattering light, utilizes the reflected light to construct a confocal microscopic imaging system, realizes fast high-spatial-resolution detection of the geometric appearance of a sample, utilizes the Raman scattering light to construct a confocal Raman spectrum detection system, for a sample with a relatively smooth surface, single-layer scanning can be carried out to quickly complete Raman spectrum detection of the surface of the sample, and for a sample with a relatively large surface fluctuation, point-by-point focusing can be carried out to realize high-spatial-resolution Raman spectrum detection. The application has the advantages of high sensitivity, fast measurement speed, wide sample adaptability (a sample with a relatively large surface fluctuation can be measured), high integration degree and simple structure.

1. The name of the design product: confocal Raman spectrometer. 2. The use of the design product: for substance discrimination and quantitative measurement. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The present application discloses a negative electrode active material and a manufacturing method thereof, a negative electrode sheet, a lithium ion battery, and a power consumption device, wherein the lithium ion battery includes one or more battery cells including a negative electrode sheet, the negative electrode sheet including a negative electrode current collector and a negative electrode film layer located on at least one surface of the negative electrode current collector and including a negative electrode active material, the negative electrode active material including a core including graphite and a coating layer located on at least a portion of the surface of the core and including an amorphous carbon, the negative electrode active material having an R-value concentration of 2.0 or less in a cumulative distribution curve of R-values ​​obtained using a laser microscopic confocal Raman spectroscopy in area scanning mode. The negative electrode active material provided herein enables batteries to combine high energy density and good dynamic characteristics.

The invention relates to the field of identification of organic pigments on the surfaces of murals, in particular to a sampling identification technology of organic pigment berberine. The method comprises the following steps: firstly, preparing a berberine mural simulation sample, and then sampling the mural simulation sample by using 3D printing hydrogel and 3D printing hydrogel doped with gold nanoparticles. The 3D printing hydrogel doped with the gold nanoparticles is applied to a mural simulation sample for a certain time, and then the mural simulation sample is placed under a confocal Raman spectrometer to measure the sampled gel so as to identify the existence of berberine. Besides, after the 3D printing hydrogel is applied to a mural simulation sample for a certain time, the 3D printing hydrogel is taken down and soaked in a methanol aqueous solution, high performance liquid chromatography and high performance liquid chromatography-mass spectrometry analysis are carried out, and berberine identification is realized through comparison with a standard substance. Microscopic observation and chromatic aberration comparison prove that the sampling method is non-invasive sampling, damage to the surface of a sample can be ignored, and the problem that in-situ identification of the organic pigment is difficult in the current mural identification process is solved.

An optical metrology device simultaneously performs confocal and non-confocal Raman spectroscopy. The optical metrology device includes a double-clad fiber with a core that acts as a confocal pinhole to receive the confocal signal from the Raman response while simultaneously receiving the non-confocal signal from the Raman response over the inner cladding and core of the double-clad fiber. A spectrometer receives the Raman response via the double-clad fiber to detect the confocal spectroscopic signal from the core and to detect the non-confocal spectroscopic signal from the inner cladding and the core.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

To provide a device and a method for generating a non-audible sound capable of improving skin quality.SOLUTION: The skin treatment device 10 mainly includes a detector 12, a generator 14, an output unit 16, and a display / operation unit 18. The detecting unit 12 has a function of detecting skin characteristics, which are characteristics of the skin of the user 20, and includes, for example, a skin viscoelasticity measuring device, a blood flow imaging device, and / or a confocal Raman spectroscopic device. The skin characteristics include, for example, characteristics including a stratum corneum moisture content, a transepidermal water loss (TEWL), a sebum amount, a blood flow rate, and / or a moisture state of the skin. The generation unit 14 can generate non-audible sounds based on the non-audible sound characteristics. The non-audible sound characteristics may include a frequency, a power level, and / or a power pattern of the non-audible sound. The output unit 16 decodes the digital data received from the generating unit 14 and outputs inaudible sounds to the skin of the subject.SELECTED DRAWING: Figure 1

A negative electrode active material, a method for its preparation, a negative electrode plate, a lithium-ion battery, and an electrical apparatus are disclosed. The lithium-ion battery includes one or more battery cells, each containing a negative electrode plate comprising a negative electrode current collector and a negative electrode film layer on at least one surface. The negative electrode film layer includes a negative electrode active material with an inner core of graphite and a coating layer of amorphous carbon. In a cumulative distribution curve of R values obtained via laser microscopic confocal Raman spectroscopy in surface scanning mode, the centralization of R values is ≤2.0. The disclosed negative electrode active material enhances both energy density and kinetic performance of the battery, improving its overall efficiency and cycle life.

The present application relates to a negative electrode active material, its preparation method, a negative electrode plate, a lithium-ion battery, and an electrical apparatus. The lithium-ion battery comprises one or more battery cells, each containing a negative electrode plate. The negative electrode plate includes a negative electrode current collector and a negative electrode film layer on at least one surface. The film layer comprises a negative electrode active material, which comprises an inner core and a coating layer. The inner core is graphite, while the coating layer contains hard carbon. In a cumulative distribution curve of R values under a laser microscopic confocal Raman spectrometer, the R50 value (50% cumulative distribution) ranges from 0.15 to 0.40. This negative electrode active material enhances the battery's energy density, kinetic performance, and cycling performance, making it highly efficient for lithium-ion battery applications.

An optical metrology device simultaneously performs confocal and non-confocal Raman spectroscopy. The optical metrology device includes a double-clad fiber with a core that acts as a confocal pinhole to receive the confocal signal from the Raman response while simultaneously receiving the non-confocal signal from the Raman response over the inner cladding and core of the double-clad fiber. A spectrometer receives the Raman response via the double-clad fiber to detect the confocal spectroscopic signal from the core and to detect the non-confocal spectroscopic signal from the inner cladding and the core.

The invention relates to a single pulverized coal particle three-dimensional chemical imaging method which comprises the following steps: cutting a single pulverized coal particle to obtain pulverized coal slices and a slice sequence of the pulverized coal slices, and performing two-dimensional chemical imaging on each pulverized coal slice based on a microscopic confocal Raman spectrum analysis method to obtain a two-dimensional chemical imaging database of the single pulverized coal particle, and reconstructing a three-dimensional chemical model of the single pulverized coal particles according to the slice sequence and the two-dimensional chemical imaging database. According to the method and the device, the problem of low three-dimensional chemical imaging precision of the single pulverized coal particles is solved, the two-dimensional images of the slices are obtained by carrying out microscopic confocal Raman spectrum analysis on the slices, and the three-dimensional particle model is reconstructed according to the two-dimensional images of the slices and the sequence of the slices, so that the three-dimensional imaging of the solid particles under the high-precision micron scale is realized.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >; wherein the positive electrode film layer does not comprise a conductive agent.

The invention provides a lithium ion secondary battery, a battery device and an electric device. The lithium ion secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the positive pole piece comprises a positive current collector and a positive film layer arranged on at least one side of the positive current collector, the positive film layer comprises a positive active material, and the positive active material comprises lithium-containing transition metal phosphate particles of which at least partial surfaces are provided with carbon coating materials; in a graphitization degree C value cumulative distribution curve obtained by the positive electrode film layer in a surface scanning mode of a laser microscopic confocal Raman spectrometer, the median C50 of the graphitization degree is greater than or equal to 0.95 and less than or equal to 1.20, and the concentration ratio (C90-C10) / C50 of the C value is 0.01-0.04; wherein the graphitization degree C value is IG / ID, IG represents the G peak intensity of the Raman spectrum at the position of 1580 + / -100 cm <-1 >, and ID represents the D peak intensity of the Raman spectrum at the position of 1350 + / -100 cm <-1 >.

The invention belongs to the field of acting force control, and particularly relates to a force control device for calibrating stress through a micro-area confocal Raman spectroscopy and a use method of the force control device. The device comprises a supporting unit, a linear loading unit and a fixing frame, the supporting unit and the linear loading unit are nested in the fixing frame, the fixing frame is provided with a supporting vertical plate and a scale plate, the supporting vertical plate is of a T-shaped frame structure, the supporting unit is installed on the transverse part of the T-shaped frame structure in the transverse direction, and the scale plate is installed on the supporting unit. The linear loading unit is longitudinally mounted at the longitudinal part of the T-shaped frame structure, so that the supporting unit is perpendicular to the linear loading unit, a supporting rod of the supporting unit corresponds to a pressure rod of the linear loading unit, and a test material is arranged between the supporting rod and the pressure rod. In the Raman signal acquisition process, the acting force borne by the test material is kept constant, so that the corresponding relation between the stress of the test material and the Raman peak displacement of the test material is accurately established, further stress calibration is performed, and the problems that the acting force is easy to return and the calibration precision is insufficient in the prior art are solved.

A method for determining glucose concentration in a three-dimensional tumor spheroid in vitro includes: adding a surface-enhanced Raman spectroscopy (SERS)-based glucose nanosensor to a co-culture of cancer cells and stromal cells so as to form a first mixture; adding the first mixture into microwells of a polydimethylsiloxane (PDMS)-based microwell array chip; subjecting the first mixture in the PDMS-based microwell array chip to incubation at 37° C. so as to form the three-dimensional tumor spheroid with the SERS-based glucose nanosensor embedded therein; transferring the three-dimensional tumor spheroid onto a glass slide to allow the three-dimensional tumor spheroid to be mounted thereon; subjecting the three-dimensional tumor spheroid to confocal Raman spectroscopy so as to obtain Raman mapping images of the three-dimensional tumor spheroid; and extracting Raman intensities from the Raman mapping images and mapping the Raman intensities to a calibration curve so as to determine glucose concentration in the three-dimensional tumor spheroid in vitro.