280results about "Analysis using electron paramagnetic resonanace" patented technology

The invention relates to a method and a device (100) for generating a useful signal (11) from a signal (5') emanating from a spin-based quantum system (4), comprising exciting the spin-based quantum system (4) by an electromagnetic field (3) which oscillates between two states at a modulation frequency, detecting the signal (5') emanating from the spin-based quantum system (4) to obtain a measurement signal (7), multiplying the measurement signal (7) with a modulation signal (9) which oscillates between two modulation signal states at the modulation frequency to generate a modulated measurement signal (7'), and demodulating the modulated measurement signal (7') to generate the useful signal (11).

The invention relates to a method and a device for evaluating a measurement signal emanating from a spin-based quantum system, comprising exciting the spin-based quantum system by a pulsed excitation light (320), detecting the measurement signal emanating from the spin-based quantum system, integrating the measurement signal over an integration window (331) containing a signal time of a first light pulse (322) to obtain a signal value, integrating the measurement signal over an integration window (332) containing a signal time of a second light pulse (322) to obtain a reference value, wherein the first and second light pulses are two time-displaced light pulses of the excitation light (320), and determining a measured value from the signal value and the reference value.

The invention provides a fluorescent / photo-thermal dual-mode sensor constructed based on an entropy-driven DNA molecular machine as well as a construction method and application of the fluorescent / photo-thermal dual-mode sensor, and belongs to the technical field of sensor construction and analytical testing. The fluorescent / photo-thermal dual-mode sensor is constructed on the basis of Ag (at) Au NPRs with good photo-thermal performance, CdTe QDs with strong fluorescence signals, a Fe3O4 (at) SiO2 nano material with superparamagnetism and an entropy-driven DNA molecular machine signal amplification strategy capable of being specifically combined with miRNA; the fluorescence detection range of the fluorescence / photo-thermal dual-mode sensor is 1 fM to 50 pM, the detection limit is 0.34 fM, the photo-thermal detection range is 1 pM to 1 nM, and the detection limit is 0.5 pM; the fluorescent / photo-thermal dual-mode sensor is simple in construction method, convenient and rapid in detection and high in selectivity, has very good practicability and has very good application in miRNA detection.

An acoustically driven ferromagnetic resonance (ADFMR) device has a piezoelectric element comprised of piezoelectric material, first and second electrodes arranged in a vertical stack with the piezoelectric element to activate the piezoelectric element to generate an acoustic wave, a radio frequency voltage source electrically connected to the first electrode, a magnet comprised of a magnetostrictive material to receive the acoustic wave, the magnet being in the vertical stack with the first and second electrodes and the piezoelectric element, wherein the acoustic wave resonates at a ferromagnetic resonance of the magnetostrictive material, and a readout circuit to detect a change in the acoustic wave by detecting g one of an output voltage amplitude, a change in impedance or a reflection of the acoustic wave in the magnet to measure an unknown magnetic field in which the ADFMR device resides and as experienced at the magnetostrictive element.

A sensor element for checking the authenticity of a planar data carrier, in particular a banknote, has a spin resonance feature. The sensor element contains a magnetic core having an air gap, into which the planar data carrier can be inserted for authentication and which defines an axial direction extending between the adjoining surfaces of the magnetic core, a polarization device for generating a static magnetic flux in the air gap, a modulation device for generating a time-varying magnetic modulation field in the air gap, and a resonator for exciting the spin resonance feature of the data carrier to be checked. The modulation device is formed by at least one planar coil arranged in the air gap, which planar coil has one or more turns about the axial direction of the air gap in one plane. The disclosure also relates to a checking device having such a sensor element.

A sensor element for testing a flat-surface data carrier has a spin resonance feature. The sensor element includes a magnetic core with an air gap, into which the flat-surface data carrier can be inserted for testing, a polarization device for generating a static magnetic flux in the air gap, and a resonator device for exciting the spin resonance feature of the data carrier to be tested in the air gap. The resonator device contains at least two stripline resonators, which are designed and configured to be operated at different excitation frequencies.

A method for extracting information about one or more magnetic sources includes obtaining a first plurality of signals corresponding to magnetic sensor data generated by one or more magnetometers in an unshielded environment at a first time; receiving second information of a direction and a magnitude of a first known magnetic field applied to the one or more magnetometer, the first plurality of signals is acquired while the first known magnetic field is applied and wherein the first known magnetic field encodes directional information of the one or more magnetic sources into the first plurality of signals; extracting the information comprising three-dimensional spatial information of the one or more magnetic sources, respective orientations and strengths of the one or more magnetic sources based on the first information, the second information, and the plurality of signals corresponding to the magnetic sensor data.

A sensor element is for testing a planar data carrier with a spin resonance feature. The sensor element includes a magnetic core having an air gap into which the planar data carrier can be inserted for testing purposes, a polarization device for generating a static magnetic flux in the air gap, and a resonator device for exciting the spin resonance feature of the data carrier to be tested in the air gap. The resonator device has at least two stripline resonators positioned at different positions in the air gap. The polarization device generates an in-homogeneous magnetic flux in the air gap so that the static magnetic flux has a first field strength at the position of a first stripline resonator and a second, different field strength at the position of a second stripline resonator.

A diamond magneto-optical sensor includes: a diamond that includes a color center with an electronic spin and is irradiated with excitation light, and an irradiation unit that irradiates the diamond with the excitation light of the color center and electromagnetic waves for magnetic resonance, wherein the irradiation unit receives modulated light having been subjected to amplitude modulation, and a modulation frequency of the modulated light is included in a microwave frequency band.

The invention belongs to the technical field of petroleum and natural gas mineral geochemical experiment research, and discloses a research method for a mechanism of extracting elemental gold in hydrothermal fluid from crude oil. In-situ visualization experiments are carried out in a transparent fused quartz capillary tube, and analysis is carried out in combination with a scanning electron microscope, an energy dispersion X-ray spectrum and a transmission electron microscope, so that continuous evolution of water droplets near an interface of oil and a solution containing HAuCl4 at a high temperature is successfully proved. According to the method disclosed by the invention, hydration electrons released in a conversion process from OH <-> to OH < * > in the water droplets are extracted, the hydration electrons and H2O2 formed in the droplets have a synergistic effect, Au3 < + > is promoted to be reduced to form natural gold atoms, the atoms are gathered into nano-scale and micron-scale gold particles in a droplet coalescence process, and a clear and reasonable mechanism is provided for formation of elemental gold in crude oil extraction hydrothermal fluid.

The invention relates to the technical field of free radical detection, and provides an in-situ electrochemical electron paramagnetic resonance spectrum test assembly and a detection method.The in-situ electrochemical electron paramagnetic resonance spectrum test assembly comprises a pool body and two electrodes, a containing cavity is formed in the pool body, and the containing cavity is used for containing a mixed solution to be detected. And the cell body is provided with a liquid injection hole and two electrode holes which are communicated with the accommodating cavity and the outside. The two electrodes are inserted into the containing cavity, one part of one electrode extends out of the cell body through one electrode hole, and one part of the other electrode extends out of the cell body through the other electrode hole. According to the in-situ electrochemical electron paramagnetic resonance spectrum testing assembly, the electrodes are inserted into the accommodating cavities and extend out of the pool body through the corresponding electrode holes, so that the electrodes are connected with a power supply and electrify and electrolyze a mixed solution in the accommodating cavities, and the electrolysis requirement in the free radical detection process is met; the method can be simultaneously suitable for free radical detection processes without electrolysis or needing electrolysis, and is better in applicability.

An electron paramagnetic resonant (EPR) instrument able to determine chemical properties of a sample using paramagnetic resonance is provided. In one embodiment, the instrument is able to measure the paramagnetic concentration of a wide variety of practical substances, ranging from food and beverages to biological specimens and solid-state electronic materials. The disclosed device can be portable and perform a measurement faster than commonly used techniques to quantify this parameter, including methods that use vibrating sample magnetometers and currently available electron paramagnetic resonance spectrometers.

The invention belongs to the technical field of terahertz, relates to terahertz communication, and particularly discloses a quasi-optical resonant cavity and a terahertz pulse compression system. According to the invention, the pulse generation module and the coupling compensation module are connected in parallel and are connected to the common reflector through the common coupler, so that function decoupling is realized. In a pulse compression stage, the common coupler introduces an incident terahertz wave beam into two optical paths, and destructive interference occurs between two paths of leakage signals by adjusting the coupling compensation module, so that zero coupling loss is realized, and the problem of large energy loss is solved. Meanwhile, the pulse generation module can independently adjust the optical path of the pulse generation module to control the pulse width, and the adjustment process does not affect the optimized interference condition, so that the high robustness of adjustment is ensured. In the output stage, energy is released by switching the state of the common coupler. Compared with the prior art, low-loss accumulation and robust pulse width continuous adjustment are realized at the same time, so that the terahertz pulse compression effect is remarkably improved.

A method for quantitatively analyzing endosomal escape efficiency of drug delivery particles includes measuring magnetic resonance signals (MR signals) reflected upon emission of electromagnetic waves (for example, radio waves) into cells having iron oxide-carrying particles ingested thereinto, with the aid of a magnetic resonance imaging device, and obtaining a change rate of magnetic relaxation with time from the measurements.

A sensor element is for testing a planar data carrier that has a spin resonance feature. The sensor element includes: a magnetic core having an air gap into which the planar data carrier can be inserted for testing purposes; a polarization device for generating a static magnetic flux in the air gap; and a resonator device for exciting the spin resonance feature of the data carrier to be tested in the air gap. The resonator device has a stripline resonator and a supply structure for the stripline resonator and is designed to generate a high-frequency field with circular polarization owing to the geometry of the stripline resonator and / or the geometry of the supply structure.

A diamond magneto-optical sensor (100) includes: a diamond (102) including a color center with an electronic spin, a transmission circuit (106) that transmits electromagnetic waves, and an irradiation unit that irradiates the diamond (102) with electromagnetic waves transmitted by the transmission circuit (106), wherein the transmission circuit (106) includes an impedance converter (108) that reduces or increases, with respect to the irradiation unit, the impedance of an electromagnetic source (110) for outputting electromagnetic waves.

The invention relates to an optical waveguide (LWL) comprising a sensor element (SE), wherein: the sensor element (SE) has a carrier material (TM); a plurality of diamonds (DM) are embedded in the carrier material (TM); one or more or all diamonds (DM) of these diamonds (DM) have NV centres (NVZ) and / or other paramagnetic centres; and the NV centres (NVZ) of the sensor element (SE) and / or the other paramagnetic centres of the sensor element (SE) emit at least fluorescent radiation (FL) when irradiated with pump radiation (LB). The invention is characterised in that the carrier material (TM) is a radiation-cured carrier material (TM). This allows for a series production process that can self-adjust and has a high Cpk value. In order to ensure the functionality of the devices constructed therewith, it is necessary that: the carrier material (TM) is substantially transparent to radiation with a pump radiation wavelength (λpmp) of the pump radiation (LB) with which the NV centres (NVZ) and / or the other paramagnetic centres are pumped; and the carrier material (TM) is substantially transparent to radiation with a fluorescence wavelength (λn) of the fluorescent radiation (LB) of the NV centres (NVZ) and / or the other paramagnetic centres.

An inductive assembly is provided that can be used to achieve a large effective volume for excitation and detection and high concentration sensitivity, preferably with low power consumption. [Solution] The present invention relates to an inductive array particularly for use in an oscillator arrangement for generating and / or detecting magnetization of a sample, having a plurality of inductive segments, each of which has an inductive element and a connection circuit electrically connected to the inductive element for electrically connecting to adjacent inductive segments.

To perform nuclear magnetic resonance sensing for accurately detecting a low-level NMR signal and having high resolution.SOLUTION: A nuclear magnetic resonance sensing unit 1 applies a high frequency magnetic field based on an RF signal to an object and generates an observation signal of a frequency obtained by shifting from RF signal frequency by NMR signal frequency. A mixer unit 6 generates an IF demodulation signal including the NMR signal. A lowpass filter 7 transmits low-frequency band components of the IF demodulation signal. A digitizing device 21 causes: a physical field generator to generate magnetic field and the like corresponding to the IF demodulation signal transmitting through the lowpass filter 7; an optical quantum sensor unit to generate light corresponding to the magnetic field and the like using a sensing member; a photoelectric element to convert the light into a sensor signal; and an analog / digital converter to digitize the sensor signal. The optical quantum sensor unit performs quantum operation to the above-mentioned sensing member to cause the sensing member to generate light corresponding to the above-mentioned magnetic field and the like.SELECTED DRAWING: Figure 1

The invention relates to a sensor element (1), comprising: a crystal with colour centres, in particular a diamond crystal (2) with NV centres (7). The sensor element (1) has a lens (3) on which the crystal is fixed, wherein the lens (3) has an orientation aid (5) for fixing the crystal to the lens (3) with a predefined orientation, and wherein the lens (3) is transmissive for excitation light (9) for exciting the colour centres, in particular the NV centres (7), and / or is transmissive for fluorescent light (6) which is generated during the excitation of the colour centres, in particular the NV centres (7). The invention also relates to an optical sensor, in particular a magnetometer (12), comprising: a sensor element (1) which is designed as described above, and a magnetic field generator (14) for generating an offset magnetic field (B0) in the region of the crystal, preferably in the region of the diamond crystal (2), wherein the offset magnetic field (B0) is oriented along a magnetic field axis (15).

The invention relates to a compound of formula (I) wherein n = 1 or 2, A and A'are independently selected from the group consisting of the following substituents (II-a) and (II-b), R and R 'are independently selected from H and a linear or branched C1-C3 alkyl group, Z is selected from a linear or branched C1-C4 alkyl group and an aryl group optionally substituted by a linear or branched C1-C3 alkyl group and / or by a hydroxyl group, and the structural unit of formula (N) is selected from the following structural units (III-a), (III-b), (III-c), (III-d) and (III-e) wherein for each structural unit (III-a), (III-b), (III-c), (III-d) and (III-e), Ra, Rb, Rc and Rd are independently selected from a linear or branched C1-C4 alkyl group. .

The invention relates to the field of electron paramagnetic resonance spectrum testing equipment, in particular to a sampling device for in-situ testing of an electron paramagnetic resonance spectrum. A sample introduction device for electron paramagnetic resonance spectrum in-situ testing comprises a micro-fluidic chip, a clamping assembly, a sample introduction pipe A, a sample introduction pipe B and a split type injection pump, and a sample introduction port A, a sample introduction port B and a sample outlet are formed in the micro-fluidic chip; one end of the sample injection pipe A is communicated with the sample injection port A, and the other end of the sample injection pipe A is communicated with the split type injection pump; one end of the sample injection pipe B is communicated with the sample injection port B, and the other end of the sample injection pipe B is communicated with the split type injection pump; a sample outlet of the micro-fluidic chip is communicated with a quartz test tube. Rapid switching of reactant concentration or solvent proportion can be achieved by controlling the flow speed of the A / B tube, a tedious sample preparation process is not needed, and the suitability and flux of electron paramagnetic resonance spectrum in-situ testing can be greatly improved.

The invention provides a method for characterising the state of health of at least one electrochemical element (24) of a battery (20), the battery (20) being a battery having a paramagnetic element with a solid or gel electrolyte, the method comprising a step of: - acquiring data relating to the at least one electrochemical element (24), the data comprising a spectrum obtained via the use of an electron paramagnetic resonance technique or an image obtained via the use of an electron paramagnetic resonance technique; and - analysing the acquired data to detect the presence or absence of an abnormal structure of the paramagnetic element in the at least one electrochemical element (24).

A method for time-resolved pump-probe resonance spectroscopy, comprising the steps of:-exposing a sample (4) to a radio frequency pump pulse (20), where the radio frequency pump pulse (20) drives a resonance, where the resonance is electron spin resonance and / or nuclear magnetic resonance, where the sample (4) is located within a magnetic bias field (22); -detecting the sample (4) with an electron detection beam (7) from the electron source (6); detecting a detection beam characteristic of the electron detection beam (7) by means of a detector unit (8), the detection beam characteristic being dependent on a magnetic moment (25) of the sample (4), the magnetic moment (25) being dependent on the driven resonance, the detector unit (8) being configured to detect the detection beam characteristic of the electron detection beam (7) at a temporal resolution for time-resolved detection of the driven resonance; and determining a property of the resonance, in particular a state of the resonance, preferably a change in the state of the resonance, on the basis of the detected probe beam property.

Disclosed is a method for characterising a sample (E), said method comprising magnetically coupling the sample to a microwave resonator (RHS) such that the coupling dominates the relaxation dynamics of an electron spin (SEL) of a paramagnetic centre of the sample, and determining, by nuclear-magnetic-resonance spectroscopy, coefficients Cij of coupling between a nuclear spin of the sample, called the probe nuclear spin (SNi), and other nuclear spins (SNj, SNk) of the sample, said method employing indirect detection of a state of said probe nuclear spin (SNi), through counting of microwave photons, of respective noise signals (SBS) produced by the return to equilibrium of said electron spin (SEL). An apparatus for implementing such a method is also disclosed.

The invention refers to a quantum sensor device for measuring a magnetic field using fluorescence dependence on the magnetic field, the quantum sensor device (18) comprising a substrate made of single-crystal diamond, and nitrogen atoms in the substrate, the nitrogen atoms being partially present in the form of negatively charged nitrogen-vacancy (NV-) centres, wherein a ratio of the concentration of NV- centres to the concentration of the nitrogen atoms in the substrate is at most 14%.

The invention relates to a method for detecting in-situ free radicals in a hydroxylamine nitrate catalytic decomposition process, which comprises the following steps: 1, catalytic decomposition: catalyzing a hydroxylamine nitrate solution to decompose by using a metal supported catalyst to obtain a decomposition solution; step 2, OH <-> detection: adding an OH <-> free radical scavenger solution into the decomposition liquid obtained in the step 1 to obtain a stable OH <-> free radical adduct, namely a DMPO-OH <-> free radical adduct; step 3, NO. Detection: adding a NO. Free radical scavenger solution into the decomposition liquid obtained in the step 1 to obtain a stable NO. Free radical adduct, namely an (MGD) 2-Fe < 2 + >-NO. Free radical adduct; 4, EPR detection, wherein OH. Free radical adducts and NO. Free radical adducts obtained in the step 2 and the step 3 are detected through an electron paramagnetic resonance instrument. The detection method has the characteristics of proper magnetic field penetration depth, no background interference, continuous and repeated detection and the like.

A high-frequency magnetic field generator 2 applies microwave to a magnetic resonance member 1. A magnet 3 applies a static magnetic field to the magnetic resonance member 1. An irradiating device 12 irradiates the magnetic resonance member 1 with incident light of a specific wavelength. An FT 4 senses a measurement target magnetic field using a primary coil 4a and applies an application magnetic field corresponding to the sensed measurement target magnetic field to the magnetic resonance member 1 using a secondary coil 4b. A pillar-shaped light guide member 41 guides the incident light to the magnetic resonance member 1, and a pillar-shaped light guide member 42 guides fluorescence that the magnetic resonance member 1 emits from the magnetic resonance member 1. Further, the magnetic resonance member 1 is arranged between an end surface of the light guide member 41 and an end surface of the light guide member 42 in a hollow part of the secondary coil 4b of the FT 4 and in a hollow part of the aforementioned magnet 3.