30 results about "Isotopes of hydrogen" patented technology

A method for processing a semiconductor fin structure is disclosed. The method includes thermal annealing a fin structure in an ambient containing an isotope of hydrogen. Following the thermal annealing step, the fin structure is etched in a crystal-orientation dependent, self-limiting, manner. The crystal-orientation dependent etch may be selected to be an aqueous solution containing ammonium hydroxide (NH₄OH). The completed fin structure has smooth sidewalls and a uniform thickness profile. The fin structure sidewalls are {110} planes.

The invention relates to an quantitative determination method of the isotope of hydrogen, hydrogen deuteride and hydrogen deuterium, which comprises using neon gas to be carrier gas, leading a gas chromatograph to adopt a double-strut double-temperature system, choosing 50 DEG C sampling temperature, sampling through an injector or a gas sampling valve, and the sampling quantity is 0.1-2.2mL, sample gas which is separated by a gas-chromatography column generates electrical signals through a detector, recording the pear areas of hydrogen, hydrogen deuteride and deuterium gas of chromatogram peaks through a chromatogram working station after the electrical signals are magnified through a front magnifier, adopting a volume correction factor normalization method or an external standard method to measure the content of hydrogen (H2), hydrogen deuteride (HD) and deuterium (D2), and getting detection results. The invention has the advantages of excellent separation effect of hydrogen isotope and high detection sensitivity, the detection of the pureness of deuterium gas can reach more than 99.99%, hydrogen deuteride (HD) and deuterium (D2) are sampled in big dosage, the peaks are not overlapped, thereby guaranteeing the quantitative detection of high-purity deuterium gas, and standard gas is not needed to be prepared in the process of detecting. The method simplifies the operation process, which is convenient for on-line detection of deuterium gas in the process of producing.

A carbon hydrogen structure (C: H) is one of the basic structures in the pharmaceutical chemistry structure and a formed C-H bond is the basic chemical bond. The invention discloses a preparation method and an application of deuterated drugs which can change the chemical bond energy and the hydrogen bond energy in the structure of pharmaceutical compound. The hydrogen atom (H) in pharmaceutical compound structure is substituted by the A deuterium atom (D) which is the isotope of hydrogen, therefore changing the molecular structure and the bond energy of the substituted pharmaceutical compound so as to form a new deuterated drug. The deuterated drugs can be used for pharmacokinetics research, can obviously enhance the disease-preventing or treating function of the drugs, and can reduce the toxic and side effect of the drugs.

The invention relates to an isotope based surface water pollution source analytical method, which comprises the steps of: 1) sampling: laying sampling points and conducting sampling according to industry standards; 2) isotope detection: taking isotopes of hydrogen, oxygen, carbon and nitrogen, namely D, <18>O, <13>C, and <15>N as the indexes; employing an isotope ratio mass spectrometer to detect the ratios of isotopes of hydrogen, oxygen, carbon and nitrogen, namely D, <18>O, <13>C, and <15>N in samples, and conducting comparison with international standard substances, and working out isotope ratios of the samples; and 3) data analysis: drawing a hydrogen and oxygen isotope ratio diagram according to the ratios of isotopes of hydrogen and oxygen, namely D and <18>O in source and convergence samples; selecting analysis nodes, calculating a pollution source contribution rate through a source convergence isotope ratio of the nodes, and determining a new pollution source by judging whether the source convergence isotope ratio of outflow nodes is balanced, and then making use of analysis of the isotopes of carbon and nitrogen, namely <13>C and <15>N to verify the accuracy of the result. The method provided by the invention has the advantages of improving the accuracy and efficiency.

The invention relates to a method and a device for concentrating and enriching stable isotopes 2H, 18O and 13C. The method comprises the steps of: by taking compounds respectively containing stable isotopes 2H, 18O and 13C as materials, carrying out purification treatment, adding to a heavy isotope concentration tower group formed by a plurality stages of gas-liquid mass transfer towers connected in series; continuously and partially vaporizing and partially condensing in the gas-liquid mass transfer towers connected in series by weak vapor pressure difference between light and heavy isotopes of hydrogen, oxygen, and carbon elements, and gradually concentrating and purifying corresponding heavy isotope. Each tower disclosed by the invention adopts different operation pressures and coupling utilization of heat between the towers; over 30-40% of energy consumption can be saved; a composite structure mass transfer component composed of a liquid collecting distributer, a Dixon mass transfer component, a corrugated mass transfer component and the like is adopted inside the tower; the device is easy to amplify; the device of producing heavy 2H, 18O or 13C isotope at a large scale just needs to be connected with 2-8 gas-liquid mass transfer towers in series; over 50% of investment is saved in comparison with the same scale of device, and the towers adopt a single tandem cascade technology; and the method is simple in flow and easy to control and operate.

The invention discloses a novel Tepotinib derivative and a preparation method thereof and an application of the derivative in an antitumor drug. According to the invention, a chiral structure is introduced in molecules, a hydrogen isotope deuterium is introduced in an easily metabolical part in the molecules, and atoms of sulfur, selenium and sulfoxide or groups are introduced in the molecules. The antineoplastic active experiments (having c-Met-expressed tumor cells) on a cell level proves that the compound has excellent antineoplastic activity, and the stability of the antineoplastic compound is obviously increased.

An electrochemical hydrogen isotope recycling apparatus for recycling an isotope of hydrogen includes an electrochemical recycling unit, the unit comprising: an anode; a cathode; and an isotope-treated, proton exchange membrane operatively disposed between the anode and cathode, the isotope-treated, proton exchange membrane having heavy water containing the isotope of hydrogen therein, the device configured to receive a feedstream containing the isotope of hydrogen. A process by which high purity hydrogen isotope products are produced using an electrochemical membrane process in which all conventional water containing components are pre-processed using a heavy water containing the isotope of hydrogen.

An industrial apparatus 10 and/or method, such as an electrochemical hydrogen isotope recycling apparatus and/or method, includes an apparatus 49 and/or process by which gaseous D₂ is recovered in a reactor 3 from a gas stream via a reaction in the reactor with another molecule to form a useful chemical compound containing D.

The invention discloses a method for separating a hydrogen isotope mixed gas, which comprises the following steps in sequence: using a positive pressure inert gas to press a transition metal salt solution from one end of a porous layer open-tube chromatographic column; After the other end of the column flows out, the inert gas is purged the porous layer open-tube chromatographic column at room temperature for 12 hours; the porous layer open-tube chromatographic column is put into the chromatographic oven, heated and dehydrated, and cooled to obtain the required porous layer open-tube chromatographic column. The above-mentioned porous layer open-tube chromatographic column is placed in a liquid nitrogen Dewar, neon gas is used as a carrier gas, and the hydrogen isotope mixture gas passes through the porous layer open-tube chromatographic column to realize the separation of hydrogen isotopes. The separation method of the invention has the characteristics of simple method, good separation effect, short separation time and the like.

The invention discloses the application of ultra-microporous metal-organic framework materials in isotope separation of hydrogen. The ultra-micro porous metal-organic framework material is SIFSIX-3-Zn, used for the effective separation of hydrogen isotopes at low temperature, and the chemical formula of the SIFSIX-3-Zn is Zn (pyr) 2(SiF6). Application of the ultra-microporous metal-organic framework material in the isotope separation of hydrogen enables the separation and purification of D2, H2 in the hydrogen isotope, and the preparation method of the ultra-microporous metal-organic frameworkmaterial is simple. The material can be synthesized in large volumes, and has the advantages of cheap raw materials and low price, and can be widely applied to the industrial hydrogen isotope separation.

The invention discloses a method for forming a self-alignment metal silicide. The two times of annealing technologies are adopted, hydrogen isotope gas is introduced in the first time of annealing technology, the hydrogen isotope gas is used for reacting with trace oxygen in the atmosphere to eliminate the oxygen, metal layers such as Ni are prevented from being oxidized, and therefore surface defects (such as a pyramid shape) of the metal silicide are reduced or avoided, and the metal silicide with a flat appearance and good uniformity is formed; isotope atoms in the introduced hydrogen isotope gas can enter the interface of the metal silicide and a silicon substrate and are combined with Si to form a new key which can be hardly fractured, and therefore the defects at the interface are overcome and reduced, and the interface state (Dit) is improved.

An exothermic fusion reactor is described that uses metal-oxygen transmutation. The process comprises a negatively-charged environment; a moderator comprising at least one noble gas; a metal, including isotopes of hydrogen; and a facilitator comprising at least one element selected from the group consisting of oxygen, carbon, nitrogen, fluorine, phosphorus, sulfur, chlorine, selenium, bromine, iodine, or combinations thereof.

The invention discloses a method for forming self-aligned metal silicide. The method has the advantages that double-step annealing processes are implemented, isotope gas of hydrogen is introduced in the second annealing process, the isotope gas of the hydrogen and trace oxygen in atmosphere react with each other, accordingly, the oxygen can be eliminated, the metal silicide can be prevented from being oxidized, surface defects (such as pyramid shapes) of the metal silicide can be reduced or prevented, and the metal silicide which has flat morphology and is excellent in uniformity can be formed; isotope atoms in the introduced isotope gas of the hydrogen can enter interfaces of the metal silicide and a silicon substrate and can be combined with Si to form new keys which are difficult to break, accordingly, defects at the interfaces can be repaired and reduced, and interface states (Dit) can be improved.

The invention relates to the technical field of fuel elements, and particularly discloses a gas absorbing device for a fuel element. The gas absorbing device for the fuel element comprises a fuel element coating material adopting a cylindrical case structure as well as a gas absorbing structure which is fixed in the fuel element coating material and can absorb hydrogen and isotopes of hydrogen, wherein the gas absorbing structure is located at the upper or lower part of a fuel pellet zone of the whole fuel element. With the adoption of the gas absorbing device for the fuel element, the content of gases such as the hydrogen, the isotopes of the hydrogen and the like in the fuel element can be decreased, risks of hydrogenation and damage to the cladding of the fuel element are reduced, emission of the isotopes of the hydrogen and pollution are reduced, and meanwhile, adverse effects on the performance of the fuel element can be avoided.

The invention relates to a high-performance low-cost titanium-based hydrogen storage alloy improved by scandium vanadium iron and a preparation method thereof, and belongs to the field of hydrogen storage alloy. The general formula of the titanium-based hydrogen storage alloy improved by the vanadium iron is Ti0.95Sc0.05 (Mn0.7-xCr0.3Mx) 2, wherein M=FeV50 or FeV80, and x is greater than or equal to 0 and less than or equal to 0.7. The reversible hydrogen storage capacity of the hydrogen storage alloy is higher than that of a Ti1-xZrxMnCr series alloy and that of a Ti1-xScxMnCr series alloy; and the cost of the hydrogen storage alloy is lower than that of the two series alloys. The hydrogen storage alloy can be applied to separation of hydrogen, separation and storage of isotopes of hydrogen, catalysts and nickel-hydrogen batteries.