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 discloses a novel pyrimidine derivative, a preparation method and application thereof in anti-rumor medicine. A chirality structure is introduced into a molecule, a hydrogen isotope deuterium is introduced to the portion, likely to be metabolized, in the molecule, and sulfur, selenium, sulfoxide and other atoms or perssads are introduced into the molecule. An anti-tumor activity experiment (for tumor cells with c-Met expression) on the cell level proves that the compound has the excellent anti-tumor activity, and the stability of the anti-tumor compound is obviously improved.

The invention provides a method for improving the uniformity of grid oxide thickness. The method is carried out in a quartz tube device, comprising the steps of: introducing a certain flow ratio of deuterium gas and oxygen into the quartz tube, and igniting the deuterium gas React with oxygen to generate D2O, which neutralizes with Si-O-dangling bonds on the wall of the quartz tube to form Si-O-D, thereby avoiding the Si-O-dangling bonds on the wall of the quartz tube from affecting the growth of gate oxide Uniformity of thickness. According to the present invention, the deuterium D2 passed into the quartz tube and the D2O generated by the ignition reaction of oxygen can effectively neutralize the Si-O dangling bonds on the wall of the quartz tube to form a Si-O-D structure. Since the chemical reaction rate of deuterium is lower than that of isotopic hydrogen, the formed Si‑O‑D structure can exist stably in the quartz tube. In the DCE oxidation process of the subsequent gate process, it can avoid breaking the chemical balance of HCl, thereby reducing the activation of Cl-, and making the thickness of the gate oxide generated in the gate oxide oxidation process more uniform.

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.

The invention relates to an online analysis method for hydrogen sulfide gas sulfur isotope in natural gas. The method includes the following steps: collecting natural gas samples; heating the oxidation furnace of the element analyzer to 1020°C; raising the temperature of the chromatographic column box to 50°C; introducing the reference gas into the stable isotope ratio mass spectrometer, and adjusting the mass-to-charge ratio to 66 The magnetic field at the center of the peak, and save the magnetic field value; connect the cylinder containing the natural gas sample to the sampling valve and put it into the fume hood, turn on the power of the fume hood; take the natural gas sample with an air-tight sampling needle; inject the natural gas sample into the In the sample port; the natural gas sample flows into the high-temperature oxidation tube with the carrier gas, and is oxidized into CO2, H2O, SO2 gas, and the mixed gas is carried by the carrier gas and flows through the dehydration tube to remove moisture; the mixed gas after removing moisture flows through the gas phase After the chromatographic column is separated, it enters the stable isotope ratio mass spectrometer through the continuous flow interface to measure the sulfur isotope composition and generate a spectrum to obtain the measurement result.

In an aspect, an electrochemical hydrogen isotope recycling apparatus for recycling a feedstream comprising a single isotope of hydrogen, comprising: an electrochemical recycling unit, the unit comprising an anode; a cathode; an isotope-treated, cation exchange membrane operatively disposed between the anode and cathode, the isotope-treated, cation exchange membrane having heavy water containing the isotope of hydrogen therein, the unit configured to receive the feedstream containing the single isotope of hydrogen; wherein the single isotope is deuterium or tritium and when the single isotope is deuterium, the heavy water comprises D2O and when the single isotope is tritium, the heavy water is T2O.

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.