54 results about "Boron doped carbon" patented technology

Boron-doped carbon-based hardmask etch processing is described. In an example, a method of patterning a film includes etching a boron-doped amorphous carbon layer with a plasma based on a combination of CH₄/N₂/O₂ and a flourine-rich source such as, but not limited to, CF₄, SF₆ or C₂F₆.

In one embodiment, a method is proposed for etching a boron dope hardmask layer. The method includes flowing a process gas comprising at least CH₄ into a processing chamber. Forming a plasma in the process chamber from the process gas and etching the boron doped hardmask layer in the presence of the plasma. In other embodiments, the process gas utilized to etch the boron doped hardmask layer includes CH₄, Cl₂, SF₆ and O₂.

The invention relates to a method for preparing boron-doped porous carbon spheres. The method comprises the following steps: 1) dissolving a saccharide carbon source and boric acid in water, and carrying out mixing and stirring by a certain ratio, so as to obtain a transparent solution; 2) adding a silicon-based pore former so as to form a boron-doped porous carbon sphere precursor solution; 3) subjecting the obtained precursor solution to a (aerosol assisted) spray drying process, so as to obtain solid-state boron-doped carbon sphere precursor particles; 4) subjecting the obtained solid particles to pyrolysis in an inert atmosphere, so as to obtain a mixture, of which a pore template SiO2 is embedded in boron-doped carbon spheres; 5) removing the silicon-based pore former from the mixture, and carrying out drying, thereby obtaining the boron-doped porous carbon spheres. According to the method, the problems of the existing boron-doped carbon material technologies that the raw material cost is high, the preparation process is miscellaneous, the boron doped amount is low, and large-scale industrial production is difficult are solved, and an alternate material, which is superior to commercial graphite, of negative poles of lithium-ion batteries is provided.

The invention relates to the field of carbon quantum dot preparation and in particular relates to a method for preparing boron-doped carbon quantum dots by a one-step solvothermal method and an application of the boron-doped carbon quantum dots. The preparation method comprises the steps of putting hydroquinone into a stainless steel high pressure reactor with a polytetrafluoroethylene lining, adding acetone according to the proportion of hydroquinone to acetone being 1.0g:5mL, and then dropping boron tribromide into the reactor slowly; putting the sealed reactor into an air dry oven, heating the reactor at 150-220 DEG C for 1-5 hours, and then cooling the reactor to the room temperature; concentrating and evaporating the mixed liquid in the reactor to dryness by using the mode of rotary evaporation, thus obtaining the boron-doped carbon quantum dots. The boron-doped carbon quantum dots prepared by the method can be used for detecting the contents of hydrogen peroxide and glucose.

The invention relates to a catalyst carrier, a supported catalyst and a preparation method and application thereof and mainly solves the problem that metal nanoparticles are prone to gathering, growing and shedding in the process of multiphase catalytic reaction due to weak interaction force between a carbon material and loaded metal nanoparticles. A boron doped carbon material is obtained by adopting biomass sugar and a born-containing compound as precursors and performing high-temperature calcining, so that the above problem is well solved. The doped carbon material highly interacts with themetal nanoparticles; when the doped carbon material serving as a carrier loads the metal nanoparticles, the metal nanoparticles can be dispersed uniformly, gathering and shedding of the metal nanoparticles in the process of catalytic reaction are effectively contained, and activity and stability of the catalyst are improved remarkably. The doped carbon material is extensive in raw material source, low in cost, easy to obtain, simple in preparation process and good in application prospect and is an ideal metal nanoparticle carrier material.

The invention relates to a preparation method of boron-doping carbon nitride as well as a product and application thereof. By virtue of a hydrothermal reaction way of melamine and boric acid, on one hand, boron atoms have chemical reaction with melamine, so that the boron and carbon-nitrogen elements are mixed in an atomic level; on the other hand, the hydrothermal reaction is performed for the melamine in an acid environment, so that a supermolecule-like structure is formed, and the separation of a carbon nitride lamina structure in the subsequent roasting process can be facilitated; and a precursor synthesized in the reaction is roasted to prepare boron-doped carbon nitride which is uniform in doping and has a thinner lamina structure. The boron-doping carbon nitride prepared by adoptingthe preparation method of the invention is uniform in element doping, thinner in lamina, better in optical catalysis, simple in preparation operation, low in difficulty and suitable for enlarged production.

Fabricating a composite material part comprises the steps of making a consolidated fiber preform, the fibers of the preform being carbon or ceramic fibers that are coated in an interphase formed by at least one layer of pyrolytic carbon (PyC) or of boron-doped carbon (BC). Obtaining a partially densified consolidated fiber preform, where partial densification comprises forming a first matrix phase on the interphase, the first matrix phase comprising a plurality of layers of self-healing material alternating with one or more layers of PyC or of BC. Continuing densification by dispersing carbon and/or ceramic powder within the partially densified consolidated preform and by infiltrating molten silicon or a liquid composition formed for the most part of silicon.

The invention discloses a TiO2 mesoscopic crystal based trypsin photoelectrochemical detection method. According to the method, a polyethylenimine(PEI)-sensitized TiO2 octahedral anatase mesoscopic crystal is utilized as a photoactive substrate material, and a signal amplification function on the substrate material by boron-doped carbon quantum dot labeling peptide (B-CODs@petide) is utilized to prepare a photoelectrochemical sensor to be applied to trypsin detection. Based on the stability and excellent conductivity of PEI, PEI and OAM can be compounded to accelerate the transfer rate of photo-generated electrons and improve photocurrent signals; through the introductions of B-CODs with the competitive light capturing ability and space hampered peptide chains, the photocurrent signals can be significantly reduced; when a modified electrode is incubated in a trypsin solution, trypsin can conduct catalytic hydrolysis on peptide bonds, and B-CODs@petide can be released from the surface of the electrode, so as to improve the photocurrent signals; the photocurrent signals and the trypsin concentration are linear in the range of 1*10<-7> to 1.0 mg/mL. The method can be used for monitoring screening of various proteases and inhibitors in early diagnoses of different diseases.

The invention relates to a preparation method of solid carbon dot fluorescent powder with high quantum yield. The preparation method comprises the following steps: weighing raw materials according tothe following constituents in parts by weight: 0.25 to 1 part of potassium hydrogen phthalate, 0.5 part of sodium azide and 0.25 to 1 part of boric acid; mixing the raw materials, then dissolving themixture in a formaldehyde solution ultrasonically, putting the mixed solution in a microwave oven for heating at the power of 225 to 750 W for 4 to 10 min, and completely evaporating the liquid at theend of reaction to obtain white powder which is nitrogen and boron-doped carbon dots (NBCDs). The preparation method is low in cost, high in preparation speed and easy to operate; the quantum yield (QY) of the prepared solid luminous NBCSs is extremely high, and the absolute solid luminous QY of the NBCSs is 67.7 percent.

The present invention relates to a composite for lithium-sulfur battery, containing a boron-doped carbon substrate and sulfur loaded; as well as a process for preparing said composite, an electrode material and a lithium-sulfur battery comprising said composite.

Transistor architectures and fabrication processes generate channel strain without adversely impacting the efficiency of the transistor fabrication process while preserving the material quality and enhancing the performance of the resulting transistor. Transistor strain is generated is PMOS devices using a highly compressive post-salicide boron doped carbon capping layer applied as a blanket over on at least the source and drain regions. The stress from this capping layer is uniaxially transferred to the PMOS channel through the source-drain regions to create compressive strain in PMOS channel.

The present disclosure generally relates to processing chamber seasoning layers having a graded composition. In one example, the seasoning layer is a boron-carbon-nitride (BCN) film. The BCN film may have a greater composition of boron at the base of the film. As the BCN film is deposited, the boron concentration may approach zero, while the relative carbon and nitrogen concentration increases. The BCN film may be deposited by initially co-flowing a boron precursor, a carbon precursor, and a nitrogen precursor. After a first period of time, the flow rate of the boron precursor may be reduced. As the flow rate of boron precursor is reduced, RF power may be applied to generate a plasma during deposition of the seasoning layer.

The invention relates to a preparation method of a boron-doped p type carbon nanotube with a high seebeck coefficient. The preparation method comprises the following steps: carrying out boron doping onto the carbon nanotube under a high temperature by using B2O3 as a boron source, wherein atoms B in B2O3 and atoms C in the carbon nanotube generate the following replacement reaction: XB2O3<+>(2+3x) C (nanotubes) to 2BxC (nanotubes)+3xCO; and then, washing, filtering and drying to obtain the boron-doped carbon nanotube (BxC). Percentage of atoms B in the boron-doped carbon nanotube (BxC) can be remarkably increased by increasing a ratio of a reactant B2O3 to the carbon nanotube, and maximum value of x can reach 0.1. According to the preparation method disclosed by the invention, reaction steps are simple and controllable, thermo-electric effect of the boron-doped carbon nanotube is remarkably strengthened and seebeck coefficient is greatly increased; moreover, the greater the x value is, the more obvious the improved seebeck coefficient is. Internal current carriers of the prepared boron-doped carbon nanotube focus on p type current carriers, so that the seebeck coefficient can reach up to 24.05 mu V/K which is increased by about 35% in comparison with that of the original carbon nanotube. The boron-doped carbon nanotube prepared by the method disclosed by the invention can be widely applied to a novel thermoelectric energy material based on temperature difference power generation.

The invention discloses a production method of boron doped carbon quantum dots. The production method sequentially comprises the following steps: adding hydrotalcite which is sieved by a 20-50 mesh sieve to a sodium tetramethylborate solution with the mass percentage concentration of 0.1-1% according to a ratio of sodium tetramethylborate to hydrotalcite of 1-1.5 mol:1 g, stirring hydrotalcite and the sodium tetramethylborate solution in 60-70 DEG C constant temperature water bath for 5-6 h, ageing the obtained solution for 12-24 h, carrying out solid-liquid separation, washing the above obtained precipitate with deionized water 2-3 times, and drying the washed precipitate to obtain sodium tetramethylborate modified hydrotalcite; putting the sodium tetramethylborate modified hydrotalcite in a vacuum tubular furnace, heating the sodium tetramethylborate modified hydrotalcite under a vacuum condition to 400-600 DEG C, carrying out vacuum calcining for 2-4 h, and cooling the obtained calcined powder to room temperature; and adding the calcined powder to a hydrochloric acid solution with the mass percentage concentration of 20-40% according to ratio of 10-15 mL:1 g, stirring the calcined powder and the hydrochloric acid solution for 3-4 h until hydrotalcite sheets are completely dissolved, and carrying out high speed centrifuge in order to obtain the boron doped carbon quantum dots. The method has the advantages of simple materials and mild conditions.

The invention relates to a preparation method of a phosphate potential boron-doped carbon-wrapped phosphoric acid iron-lithium material. According to the preparation method, phosphoric acid iron, a lithium source, boric acid, oxalic acid and a carbon source which are taken as raw materials are prepared into a carbon-wrapped mixed primary raw material in a liquid phase through water bath stirring, and the carbon-wrapped mixed primary raw material is subjected to rapid high-temperature thermal treatment to generate a carbon-wrapped boron-doped lithium iron phosphate LiFeP1-xBxO4/C (x is greater than or equal to 0.05 and less than or equal to 0.20) anode material. The lithium iron phosphate anode material prepared by using the preparation method has the advantages that crystal grains grow sufficiently, the grain appearance is regular, and excellent electrochemical property is achieved. The preparation method provided by the invention has the advantages of simplicity and easiness in synthesis process, environmental-friendliness, easiness in in-scale production and industrialization.

The invention discloses a porous boron-doped carbon-loaded platinum nanoparticle catalyst based on an electrostatic spinning technology, and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: adding a surfactant coated with platinum nanoparticles, a boron-containing compound and a high-molecular polymer into an organic solvent, and carrying out stirring at 60-80 DEG C for 2-4 hours to form a viscous mixed solution; transferring the obtained viscous mixed solution into an injector, and carrying out spinning under the conditions that a voltage is 14-18 kV and a propelling speed is 1-2.5 mL/h to obtain a blocky spun material; and oxidizing the obtained blocky spun material in an air atmosphere at 180-250 DEG C for 1-3 hours, andcarrying out high-temperature calcination on the obtained oxidized material in a high-purity gas atmosphere at 700-1000 DEG C for 2-4 hours so as to obtain the catalyst disclosed by the invention. The catalyst provided by the invention is low in preparation cost, has relatively high electrocatalytic activity and super-strong stability when applied to preparation of ozone through electrolysis of water, and obviously improves the current efficiency of the preparation of ozone through electrolysis of water.

Electrodes, including anodes and/or cathodes, comprising a three-dimensional boron-doped carbon nanotube macro-material are disclosed. The anode and/or cathode can be prepared using chemical vapor deposition, using a metal foil, such as a copper foil, as a substrate, and in other embodiments, or can be adhered to a metal foil following preparation. The anode and/or cathode are porous, and a portion of the pores can be filled with appropriate anode or cathode active materials. Preferred active materials for the anode comprise lithium metal or lithium-containing alloys. Preferred active materials for the cathode comprise lithium salts, such as lithium oxide or lithium sulfide, Batteries, capacitors and supercapacitors comprising these anodes and/or cathodes are also disclosed.

The invention relates to a preparation method for a carbon nanotube heterostructure. The method comprises the steps of: taking an Si sample as the anode and platinum as the cathode, electrolyzing the anode and cathode in an electrolyte solution formed by mixing of deionized water, ethanol absolute and hydrofluoric acid to form taper holes on the Si surface; synthesizing an Fe3O4 nanoparticle catalyst by a high temperature liquid phase technique; dissolving ferric acetylacetonate into oleic acid grease and diol, and carrying out high-temperature pyrolysis in a phenyl ether environment; dripping the prepared Fe3O4 nanoparticle solution on the porous silicon surface, and performing natural drying in the air; placing the well prepared porous silicon sample in a vacuum chamber, conducting base vacuum pumping and introducing H2, opening a microwave source to perform pretreatment, raising the temperature of the substrate to a predetermined temperature through a heating system and plasma bombardment together; after pretreatment, introducing CH4 and B2H6 gas to prepare a boron doped carbon nanotube; stopping introducing B2H6, and increasing the CH4 flow to prepare the pure carbon nanotube. The method provided by the invention is simple and is low in cost. The obtained heterostructure has stable performance, and stronger optical and electrical properties.

Systems and methods for processing a substrate include arranging a substrate including a film layer on a substrate support in a processing chamber. The film layer includes a boron doped carbon hard mask. A plasma gas mixture is supplied and includes molecular hydrogen, nitrogen trifluoride, and a gas selected from a group consisting of carbon dioxide and nitrous oxide. Plasma is struck in the processing chamber or supplied to the processing chamber for a predetermined stripping period. The plasma strips the film layer during the predetermined stripping period and the plasma is extinguished.