Method for hybrid plasmon-luminescent markers production

FIELD: chemistry.

SUBSTANCE: method consists in formation of metal plasmon nanoparticles on the inorganic luminescent nanoparticles surface, where nanoparticles are previously doped by rare earth metal ions. Plasmon nanoparticles are prepared by reduction of liquid solutions. The colloidal solution of inorganic luminescent nanoparticles in 1.2-dichloroethane is mixed with a supramolecular complex solution [{Au10Ag12(C2Ph)20}Au3PPh2(C6H4)3PPh2)3][PF6]5 in 1,2-dichloroethane to obtain a liquid solution, the liquid solution is recovered by laser radiation with a wavelength corresponding to the absorption band of the supramolecular complex, a power density of from 0.1 to 1 mW/cm2at laser exposure time of 10-60 minutes.

EFFECT: invention enables high chemical purity of markers and small number of processing steps.

5 dwg, 3 ex

 



 

Same patents:

FIELD: printing.

SUBSTANCE: invention relates to documentation expertise and can be used in the forensic, criminalistics and judicial practice in technical expertise of determining the true execution time of details of documents made with ballpoint pen ink, ink for capillary, gel, fountain, "roller" type pens, ink for watercolour pens and ink jet type printers, colouring matters of printers of a matrix type, typewriters, and the impressions of seals (stamps) and other materials of writing. The method of determining the age of strokes of the colouring matters of the details of the documents is that the colouring matter is selected for a control stroke and the control stroke is created, the samples are obtained of the test stroke and the control stroke, which execution date is known. Then the samples are extracted in a solvent and the total colour difference is determined and the difference in lightness for the test and the control strokes with respect to the solvent, receiving the samples of the control and test strokes is repeated at least once in at least one time interval, as well as their extraction in the solvent and determining the total colour difference and the difference in lightness of the test and control strokes, and relative remoteness of the application of the test stroke is determined. At that obtaining the samples of the test and control strokes is carried out by making impressions of the test and control strokes on segments of an absorbent material wetted with a solvent. And as the absorbent material used is cellulose acetate, and as the solvent - methanol. In addition, selection of the colouring matter for the control stroke is preferably carried out by identifying the type of the writing material of the document, measuring the spectral characteristic of the colouring matter of the details of the document, and selection of the colouring matter of the same material type of writing as the colouring matter of the details of the document, and with the spectral characteristics most similar to the spectral characteristic of the colouring matter of the details of the document.

EFFECT: providing the possibility of determining the age of strokes without violation of integrity of the document with minimal changes to the appearance of the document.

2 cl, 4 dwg, 2 tbl

Mercury monitor // 2521719

FIELD: chemistry.

SUBSTANCE: mercury monitor has a sample input unit, a thermal atomiser, an analytical cuvette which can be heated, a gas collector unit and a pumping-out flow activator. The cuvette is optically connected to an atomic absorption spectrometer and has at least one input gas port at the centre thereof and at least two outlet gas ports. The sample input unit is connected to a pumping-in flow activator capable of feeding the analysed sample into the thermal atomiser, and holes are made on the housing of the analytical cuvette on two sides between the window and the closest output gas port with the possibility of feeding air through said holes.

EFFECT: improved consumer properties of the monitor.

6 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medicine, particularly to functional diagnostics in cardiology, and may be used for diagnosing myocardial diseases caused by chronic cardiac failure, or ischemic heart disease, or cardiac defects. The technique is characterised by preparing a blood serum sample by drying serum, milling a dry residue and suspending it in Vaseline oil; examining the sample by infrared spectroscopy within the range of 1200-1000 cm-1, determining the absorption band peak heights with maxima at 1165,1160,1150,1140, 1130, 1100, 1070, 1050, 1040, 1025, 1005 cm-1 and calculating the 14 peak heights relations; comparing the derived peak heights to those in healthy people (norm); after the relations has been compared, the number of the derived relations different from the values specific for healthy people (norm) are summed up; the sum is divided by the total number of the relations - 14, and if the derived relation is 0.21 or more, a myocardial disease is diagnosed.

EFFECT: diagnostic technique provides accurateness and expressiveness; requires no heavy material costs and is easy to implement.

3 ex

FIELD: measurement equipment.

SUBSTANCE: invention related to the field of laboratory medical analysis, analytic instrument-making. The method consists in the fact that parameters of conversion for a system of image recording with specified equipment functions, including the main components of normalised spectral signals r(Λk)=V(Λk)/V(Λ0), where Λ0 - reference spectral section, and coefficients of non-linear multiple regressions between concentrations of chromophores Cq and normalised signals r(Λk) or their projections to space of main components, they determine by means of simulation of radiation transfer into tissues with account of characteristics of the used system of recording and possible ranges of variations of structural and biochemical parameters of the tissue. At the same time the tissue is illuminated with a linearly polarised radiation, a multispectral image is recorded V(x, y, Λk) with polarisation, orthogonal to polarisation of illuminating radiation, additionally they record a multispectral polarised image V(x, y, Λk) with absence of tissue illumination. For each point x, y they produce normalised spectral signals r(Λk) by normalisation of layers of a differential multispectral image V(x, y, Λk)-V(x, y, Λk) to a differential reference layer V(x, y, Λ0)-ν(x, y, Λ0), and concentration of chromophores Cq(x, y) in each point x, y is determined in accordance with corresponding normalised spectral signals using non-linear multiple regressions between Cq and r(Λk) or between Cq and projections r(Λk) to the space of main components.

EFFECT: invention provides for increased accuracy of production of 2D distributions of biological tissue chromophore concentration.

6 dwg, 1 tbl

FIELD: measurement equipment.

SUBSTANCE: method to predict future characteristic value in a system at a future moment of time, including one or more reagents that are exposed to the process. The method includes the stages, at which: they measure multiple characteristics of the specified system into multiple moments of measurement time preceding the specified future moment of time with formation of multiple results of measurements of each characteristic within the period of time; and they predict the value of the specified future characteristic by means of formation of a combination of the specified multitude of measured characteristics by means of summation of the specified multitude of measured characteristics at each moment of time of measurement, multiplied by specified weights used for each measured characteristic at each moment of time of measurement, with formation of the appropriate scalar product and subsequent summation of the specified scalar products.

EFFECT: increased efficiency of analysis procedure.

16 cl, 2 dwg

FIELD: instrument making.

SUBSTANCE: spectrometer comprises optically coupled source of radiation with a wave length corresponding to resonant absorption of a determined element, a polariser, an optic modulator, a phase plate and an atomiser, arranged in the permanent magnetic field, optically coupled monochromator and receiver of radiation, a system of signal registration and processing, electrically connected with the receiver of radiation and synchronised with the optic modulator, and also a device of conversion of radiation optically coupled with the atomiser and the monochromator, made in the form of the optically coupled second polariser and a bundle of light guides with alternating profile, besides, the input end of the bundle of light guides has the shape matching with the profile of the cross section of the bundle of radiation, and the output end has the extended shape, and it is matched with the input slot of the monochromator.

EFFECT: increased illumination of a spectrometer and reduced time of analysis.

3 cl, 3 dwg

FIELD: measurement equipment.

SUBSTANCE: gas analyser comprises a source of light, emitting light with wave length of at least one spectral mercury line, a metering pan, where the measured gas is located, containing mercury, a light receiver, a data processing unit and a calibrating pan installed on the way of the light beam for monitoring of serviceability. To measure mercury content in gas, benzol is used as comparative gas in the calibrating pan.

EFFECT: invention makes it possible to simplify calibration of a gas analyser.

9 cl, 4 dwg

Processing machine // 2484929

FIELD: process engineering.

SUBSTANCE: invention relates to processing machine. Proposed machine, first of all, saw bench, has working surface to accommodate workpiece and working tool attachment fitting. Said working tool attachment fitting can displace relative to working surface. Besides, machine is equipped with recogniser unit. Said unit is intended for recognising availability of definite material in working tool zone by spectral analysis of radiation.

EFFECT: reliable and fast identification of working situation.

13 cl, 12 dwg

FIELD: physics.

SUBSTANCE: apparatus has a light source for generating a plurality of light beams, each of the plurality of light beams having a wavelength range different from the others, as well as a light funnel for directing the plurality of light beams to the analysis region, an aperture for directing the plurality of light beams from the analysis region to the lens. The lens is configured to collect light beams from the analysis region. The apparatus also has a detector which has a plurality of light-sensitive devices, each configured to detect a light beam and generate an output signal indicating intensity of the detected light, and a processor for determining blood characteristics as a function of each generated output signal.

EFFECT: invention makes multiple checks painless and increases intensity of the determined light.

15 cl, 7 dwg

FIELD: physics.

SUBSTANCE: apparatus has means of analysing at least two liquid and/or gas streams, which include at least one light source, at least one optical signal detector and at least one system for analysing the detected signals. At least one of said analysis means is configured to analyse said two streams.

EFFECT: invention enables to minimise the size and additional weight of the apparatus, increase of which is associated with use of equipment employed in methods of analysing different streams, easier control of such a system.

18 cl, 6 dwg

FIELD: electricity.

SUBSTANCE: inventions may be used in lighting systems. A luminophor mixture consists of rare-earth red-emitting phosphor, for example YOE, rare-earth green-emitting phosphor, for example any of LAP, CAT or CBT, and rare-earth blue-emitting phosphor, for example any of BAM and SCAp. The size of 50% of phosphor, i.e. the medium diameter in volume, varies from 12 mcm up to less than 15 mcm. A fluorescent lamp contains electrodes and a glass encapsulation coated with the above mixture at the inner side, sealed hermetically and containing mercury and an inert gas. The luminophor coating is applied in one or two layers, the first layer is up to 40-60% of the weight of the luminophor coating.

EFFECT: inventions ensure an increased efficiency of the fluorescent lamp.

14 cl, 7 dwg, 1 tbl

FIELD: chemistry.

SUBSTANCE: luminescent lithium borate glass based on lithium tetraborate Li2B4O7 contains three dopants and has the following composition: thulium oxide Tm2O3 in concentration of 0.38-0.40 wt %, terbium oxide Tb2O3 in concentration of 0.38-0.40 wt %, europium oxide Eu2O3 in concentration of 0.08-0.09 wt % and lithium tetraborate Li2B4O7 (the balance).

EFFECT: producing luminescent glass with high transparency in the visible range.

1 tbl, 3 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to surgery and diagnostic research methods, in particular to intraoperative visualisation. The targeted delivery of conjugates of nano-sized anti-Stokes phosphori (NAP) with molecules, selectively binding with a target biostructure, subjected to visualisation is carried out. Irradiation of a pathological focus by infra-red radiation in the range of 975-980 nm is carried out. Intraoperative visualisation of the luminescence of the surface and subsurface pathological foci is performed in the blue spectral range by the naked eye. Deep optic probing by means of an optic probe is performed to register the pathological foci, located at the depth, mainly, in the infra-red spectral range.

EFFECT: method provides high sensitivity of the differentiation of the pathological foci from normal tissues, high resolution of visualisation, makes it possible to differentiate the surface and subsurface pathological foci by the naked eye, and the pathological foci, located at the depth, by means of the optic probe.

4 cl, 3 ex, 7 dwg

FIELD: chemistry.

SUBSTANCE: invention relates to polymer-inorganic composite materials based on polymethylmethacrylate and nanoparticles of solid ZrO2 solutions with lanthanides, selected from Eu, Tb and Tm. Such nanocomposites are intended for application in optics and optoelectronics, in particular can be applied as preparations for control and control of fluorimeters and spectrofluorimeters, as well as sensors of ultraviolet radiation. Described is polymer-inorganic nanocomposite material based on polymethylmethacrylate, including 0.9-5 wt % of covalently bound nanoparticles of zirconium dioxide, containing ions of rare earth elements Eu3+ or Tb3+, or Tm3+ in amount 0.1-1 mol. % by any of elements or mixture of zirconium dioxide nanoparticles, containing ions of rare earth elements Eu3+ or Tb3+, or Tm3+ in amount 0.1-1 mol. %. Nanocomposites are obtained by either copolymerisation of methylmethacrylate with surface-functionalised ZrO2, nanoparticles, doped with Eu2O3, or ZrO2, doped with Tb2O3, or ZrO2, doped with Tm2O3, as well as with their combinations, in solution or mass, either mixing already ready PMMA systems - ZrO2(Eu2O3), PMMA - ZrO2(Tb2O3) and PMMA - ZrO2(Tm2O3).

EFFECT: material possesses adjustable spectrum of photoluminescence, realised due to variation of content and composition of covalently bound luminescing ZrO2(Ln2O3) nanoparticles in PMMA matrix, as well as due to selection of exciting light wavelength.

2 cl, 6 dwg, 3 tbl, 3 ex

FIELD: chemistry.

SUBSTANCE: complex silicate of rare earth elements of a composition Sr2Gd8(1-x)Eu8xSi6O26 (0.001≤x≤0.5) in a nanoamorphous state is used as a red glow luminophore.

EFFECT: luminophore possesses the high intensity of red glow, with the intensity of orange glow to red being reduced in comparison with the known luminophores.

3 ex

FIELD: physics, optics.

SUBSTANCE: invention relates to fluorescent materials and specifically to a monocrystalline fluorescent material for white light-emitting diodes. The material is a solid solution of aluminium oxide and yttrium aluminium garnet with cerium and has a composition corresponding to the formula Y3-xCexAl5+yO12+1.5y, where x=0.02-0.05, y=0.17-3.97.

EFFECT: high photoluminescence intensity of the fluorescent material coupled with high operational stability in varying climatic conditions.

2 dwg, 3 ex

FIELD: electricity.

SUBSTANCE: invention relates to light engineering and in particular to composite fluorescent materials used for solid-state achromatic light sources. According to the invention composite fluorescent material is suggested for solid-state achromatic light sources, which contain light-emitting diode that emits within range of 430-480 nm and a mixture of at least two luminophores; the first luminophore has cadmium-orange light emission within the range of 560-630 nm while the second one is taken from aluminate group of earth metals activated with europium. At that at least one light-accumulating luminophore having long-term afterglow, which practically unexcited by primary emission of the light-emitting diode is used as the second luminophore. Mass ratio of cadmium-orange luminophore and light-accumulating luminophore is the following: cadmium-orange luminophore is 10-90%, light-accumulating luminophore is 10-90%.

EFFECT: obtained material is characterised by high brightness and light parameters corresponding to radiation curve of absolutely black body with colour temperature from 2900 up to 6100 K, long-term afterglow and low costs.

5 cl, 1 tbl

FIELD: process engineering.

SUBSTANCE: invention relates to production of luminescent ceramic converter. Proposed method comprises the steps that follow. (a) Integration of precursor material with ore-forming admixture to get raw mix. Note here that ore-forming admixture comprises, in fact, spherical particles of carbon or organic material. (b) Moulding raw mix to make raw billet of ceramic converter. (c) Heating of raw billet to remove ore-forming admixture and to form pre-calcined ceramic material with, in fact, spherical pores. (d) Sintering of pre-calcined ceramic material to form luminescent ceramic converter. Proposed luminescent ceramic converter comprises sintered monolithic ceramic material converting light with first wavelength in light with second wavelength. Ceramic material has, in fact, spherical pores with mean size of 0.5-10 mcm.

EFFECT: controlled distribution of pores and pore sizes on luminescent ceramic converter.

17 cl, 1 tbl, 2 dwg

FIELD: chemistry.

SUBSTANCE: luminescent composite coatings contain polymer binding substances - high-strength heat-resistant poly(o-hydroxyamides) - products of polycondensation of isophthalic acid dichloride with 3,3'-dihydroxy-4,4'-diamino-diphenylmethane or isophthalic acid dichloride with a mixture of 3,3'-dihydroxy-4,4'-diaminodiphenylmethane with bis-(3-amino-propyl)-dimethyl-siloxane in an amide solvent, as well as a mixture of UV and anti-Stokes phosphors based on rare-earth elements. The coatings are dried at 100-120°C for 15-30 minutes after deposition. The coatings are stable over time and withstand cyclic thermal loads from -50 to +300°C.

EFFECT: ensuring stability of properties of the composite and parameters of the formed coating and uniformity of deposited coatings which have high adhesion to lavsan, polyimide, metals, crystals and other substrates.

1 tbl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to lanthanide complexes, particularly the novel compound europium tric[1-(4-(4-propylcyclohexyl)phenyl)decane-1,3-diono]-[1,10-phenanthroline] of formula

,

which can be used as a luminescent material.

EFFECT: obtaining luminescent material in form of optically transparent films, having twice as high luminescence efficiency in the red spectral region compared to the closest analogue and having five times as high light transmission.

2 dwg, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to colloidal chemistry and can be used in luminescent labels, as well as in production of materials for lasers, light diodes, solar panels, and photocatalysts. First, sodium sulfide and silver nitrate are prepared separately. For this purpose 0.01-0.5 g of sodium sulfide and 0.01-0.5 silver nitrate are dissolved in 40-200 ml of cold distilled water. 0.5-20 g of gelatin swell in reactor for 30 min in 100-500 ml of distilled water with temperature from 20-30°C. Obtained gelatin solution is heated to 40-90°C with mixing, 5 ml of 96% ethanol are poured into it. After that, double-stream pouring of prepared solutions of sodium sulfide and silver nitrate is realised, with further heating for 10-20 min with obtaining sol of colloidal silver sulfide quantum dots and cooling to 4-10°C for 10 hours. Obtained jelly is crushed to size of granules 5-10 mm, washed with distilled water at temperature 7-13°C, excess of water is decanted and granules are heated to temperature higher than 40°C.

EFFECT: invention makes it possible to obtain silver sulfide quantum dots with size 1-5 nm in gelatin matrix, luminescent in the range 800-1100 nm.

2 cl, 4 dwg, 2 ex

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