366 results about "Telluride" patented technology

A zinc ion-exchanging battery device comprising: (A) a cathode comprising two cathode active materials (a zinc ion intercalation compound and a surface-mediating material); (B) an anode containing zinc metal or zinc alloy; (C) a porous separator disposed between the cathode and the anode; and (D) an electrolyte containing zinc ions that are exchanged between the cathode and the anode during battery charge/discharge. The zinc ion intercalation compound is selected from chemically treated carbon or graphite material having an expanded inter-graphene spacing d₀₀₂ of at least 0.5 nm, or an oxide, carbide, dichalcogenide, trichalcogenide, sulfide, selenide, or telluride of niobium, zirconium, molybdenum, hafnium, tantalum, tungsten, titanium, vanadium, chromium, cobalt, manganese, iron, nickel, or a combination thereof. The surface-mediating material contains exfoliated graphite or multiple single-layer sheets or multi-layer platelets of a graphene material.

A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from (A) non-Li alkali metals; (B) alkaline-earth metals; (C) transition metals; (D) other metals such as aluminum (Al); or (E) a combination thereof; and wherein at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nano-structured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with said electrolyte, and wherein the operation of the battery device does not involve the introduction of oxygen from outside the device and does not involve the formation of a metal oxide, metal sulfide, metal selenide, metal telluride, metal hydroxide, or metal-halogen compound. This energy storage device has a power density significantly higher than that of a lithium-ion battery and an energy density dramatically higher than that of a supercapacitor.

The invention provides a preparation method of an active radical with a surface-enhanced Raman scattering (SERS) effect, belongs to the technical field of spectrum detection, and relates to the preparation technology of the SERS active radical, which is rapid, has high sensitivity and performs a low trace detection function. The preparation method is characterized in that firstly, a nano porous silicon columnar array with a large specific surface area is prepared by utilizing a hydrothermal etching technology; afterwards, a nanowire structure of an II-VI group compound semiconductor (such as zinc oxide, titanium dioxide, cadmium sulfide, cadmium selenide, cadmium telluride, and the like) by utilizing a chemical vapor deposition method; and finally, nano particles of precious metal (such as gold, silver, copper and the like) are finally prepared on the nanowire structure by using a chemical reduction method, so as to obtain an active radical material. The preparation method has a wide application prospect in the aspects of clinical biomolecular fast recognition, trace chemical substance detection, biological sample analysis, and the like. The preparation method has the advantages that the preparation process of each material is simple, the condition is mild and the repetition rate reaches 100 percent.

The invention discloses a dual-mode optical coding probe and a preparation method thereof. The probe is in a three-layer core-shell structure, the first-layer core is a gold nano bar, the second-layer shell is silica, the third-layer shell is a cadmium telluride quantum dot, the second-layer shell is wrapped on the outer side of the first-layer core, the third-layer shell covers the outer side ofthe second-layer shell in a sticking mode, and the outer surface of the first-layer core is stuck with Raman molecules which are wrapped by the second-layer shell. The preparation method of the dual-mode optical coding probe comprises the following steps of: 1, preparing an original gold nano bar solution; 2, preparing gold nano bars marked by the Raman molecules; 3, preparing a gold nano bar andsilica metal medium composite nano ball solution; and 4, preparing the dual-mode optical coding probe. The dual-mode optical coding probe has the joint encoding capacity of fluorescence and SERS (Surface Enhanced Raman Scattering), and enhances the optical coding capacity. The preparation method of the dual-mode optical coding probe has a simple process and high repeatability.

The invention relates to a back contact electrode in a CdTe membrane solar cell structure. The electrode comprises a transparent conductive glass layer, a window layer, a light absorbing layer and a blocking layer and is characterized in that: a graphene membrane layer serving as the back contact electrode is prepared on the back face of an anti-insertion layer; and the thickness of the graphene layer is between 0.1 mu m and 1 millimeter. A preparation method of the back contact electrode comprises preparation of the transparent conductive glass layer, preparation of the window layer, preparation of the light absorbing layer and preparation of the blocking layer and is characterized by comprising the following steps of: adding an adhesive into graphene so as to prepare graphene slurry; and preparing the graphene slurry into a graphene layer. The back contact electrode and the preparation method have the advantages that: a process adopted by the preparation method is compatible with the conventional CdTe cell process, and a new measure for realizing a low-cost, high-performance and large-scale CdTe cell is provided.

An embodiment of the invention provides a detection system and a detection method and aims to effectively improve the problem that, in the prior art, the detection system based on a scintillator detector has limited applicable range. The detection system comprises a zinc cadmium telluride linear-array detector, a processor and a plurality of read-out circuits; the zinc cadmium telluride linear-array detector comprises a zinc cadmium telluride detector which comprises a plurality of pixel units; among the pixel units, a gap is formed between every two pairs of pixel units, and each pixel unit corresponds to one read-out circuit; the zinc cadmium telluride linear-array detector is used for converting X-ray energy detected, into electrical signals; the read-out circuits are used for acquiring the electrical signals corresponding to the pixel units and read counting of the electrical signals the amplitude of each which meets a preset threshold so as to obtain a count value; the processor is used for analytical imaging. The detection system is simple in structure and ingenious in design and high in ray conversion efficiency, has applicable range evidently widened and is convenient to implement and easy to popularize and apply.

The invention relates to a detection method for the content of adenosine in a biological sample. An adenosine probe is formed by mixing ferriferrous oxide magnetic nano-particles with surfaces modified by an adenosine aptamer segment 1 and cadmium telluride quantum dots with surfaces modified with an adenosine aptamer segment 2; the adenosine probe and the adenosine are paired by an alkali group to form an adenosine sandwiched structure, and the adenosine sandwiched structure is separated from the biological sample; the content of the adenosine is quantified by applying ion exchange effect of silver ions and cadmium ions in the cadmium telluride quantum dots in the adenosine sandwiched structure; the method has the characteristics of very high sensitivity, accuracy and precision.

The invention relates to a preparation method and application of a multifunctional nano siRNA (Small Interfering Ribonucleic Acid) carrier system which integrates tumor targeting, pH sensitivity, visualization and the like. The core of the siRNA nano carrier system consists of cadmium telluride quantum dots. A nano carrier shell consists of a tumor targeted gene, a 9 poly-l-arginine peptide chain and PEG (Polyethylene Glycol). The siRNA nano carrier is good in biocompatibility, strong in tumor targeting and high in cell transfection efficiency, and has the characteristics of high quantum yield, strong optical stability, lossless in-position real-time monitoring and the like, so that the system is suitable for being used as a nano transmission system for in vivo gene therapy of tumors.

The invention discloses a preparation method of a photo-induced chemical paper chip for detecting expression of polysaccharides on surfaces of cancer cells. The preparation method comprises the following steps: designing lyophobic wax printing patterns of the paper chip by using Adobe illustrator CS4 software; printing the paper chip by using a wax printer; printing a working electrode, a reference electrode and a counter electrode by using a screen printing technique; growing gold nanoparticles in a working region, then connecting photoelectric material zinc oxide, cadmium telluride quantum dots and gold-grafted meso-porous silicon, modifying HRP-mdsDNA, and providing a built-in light source and binding sites of recognition cells for a photo-induced chemical system; and finally, adding a polysaccharides inhibitor, and detecting expression of the polysaccharides on the surfaces of the tumor cells by change of photocurrent response.

The invention belongs to the technical field of the preparation of the semiconductor material and particularly discloses a method for preparing copper-sulfur compound nano-crystals with controllable morphology based on a chemical vapor deposition method. The method adopts the chemical vapor deposition method, the temperature and pressure of the reaction system and the product collection area are controlled to prepare different morphologies of copper-sulfur compounds such as copper sulfide nano-crystals, copper sulfide nano-rods, copper sulfide nano-sheets and copper sulfide nano-flower-cluster. The method comprises the following specific steps: (1) injecting a solid precursor; (2) controlling the pressure and temperature of the system and injecting a gaseous precursor; and (3) collecting the product. The copper-sulfur compounds prepared by the method are characterized by good monodispersity, high sample purity and the like. The method can also be used to prepare other metal semiconductors such as sulfides, selenides and tellurides; and by changing the reaction conditions of the system, the morphology of the product is regulated and then applied in fields such as the preparation of functional semiconductor elements, photoelectric conversion and catalysis.

The invention belongs to the field of nano material preparation, and in particular discloses a platinum telluride two-dimensional material, i.e., platinum telluride nanosheets. The invention also provides a preparation method of the platinum telluride two-dimensional material; the method comprises the steps of enabling tellurium powder and platinum powder to be volatilized at a temperature not lower than 410 DEG C and a temperature of 1000-1170 DEG C respectively, and enabling the volatilized tellurium and platinum to be deposited on the surface of a substrate by means of chemical vapor deposition under the conditions that the carrier gas flow is 50-400sccm and the temperature is 350-720 DEG C so as to obtain the platinum telluride nanosheets. The invention also relates to the platinum telluride two-dimensional material prepared by the method, optical devices prepared from the platinum telluride two-dimensional material, and especially comprises application of the platinum telluride two-dimensional material in PtTe2 field effect transistors. The platinum telluride nanosheets are good in morphology and are hexagonal and triangular, have thicknesses of 2-40nm and sizes of 1.5-52mu m,and are good in crystallinity; the preparation method is simple and easy to implement.

The invention relates to a universal preparation method for synthesizing a carbon-coated nickel metal compound with various morphologies as a sodium ion battery negative electrode material by utilizing a metal organic framework design. The method comprises the following steps: dissolving an organic ligand, a nickel source and a surface dispersant into a mixed solvent according to a certain ratio,and controlling hydrothermal reaction time to generate nickel-containing metal organic frameworks with different morphologies (solid spheres, core-shell spheres and hollow spheres); the carbon-coatednickel-containing compounds (nickel oxide, nickel phosphide, nickel sulfide, nickel selenide and nickel telluride) with the shape similar to that of a template are synthesized by taking the frameworksas the template and adjusting an anionic ligand and utilizing an ion exchange strategy. The preparation method has the advantages that the morphology is adjustable; the components are rich; conditions are easy to control; the operation is simple; the conversion efficiency is high; the synthesis method has universality and can be expanded to synthesis of other types of carbon-coated metal compounds; and the product has high specific capacity and good rate capability.

The invention discloses a method for preparing bifluorescence emission nano-probes in a post-encoding mode. A fluorescent probe precursor which can be used for post-encoding is synthesized by taking cadmium telluride quantum dots and gold nanoclusters as fluorescence encoding elements and silicon balls as a carrier of the encoding elements according to the fluorescent characteristics of the quantum dots and the gold nanoclusters; and then an optical regulator is added into the precursor in a post-encoding mode to prepare the bifluorescence emission nano-probes. The fluorescence intensity ratio of two encoding elements in the obtained bifluorescence emission nano-probes is relatively large, so that the observation on the change of a fluorescent signal at relatively high resolution is facilitated. The method for preparing the bifluorescence emission nano-probes comprises the following steps of: preparing the quantum dots, wrapping silicon on the quantum dots, synthesizing the gold nanoclusters, synthesizing fluorescent probe precursor microspheres, and preparing the bifluorescence emission nano-probes. The invention has the advantages that the synthetic method is simple; the encoded probes have the irreversibility; the reproducibility of different batches of probes is high; and an effective method for preparing a large number of bifluorescence emission nano-probes which can be used for fluorescent imaging is provided.

The invention discloses a cadmium telluride quantum dot grafted graphene-carbon nanotube composite thin film optical switch material and a preparation method thereof. The optical switch material consists of a graphene-carbon nanotube composite thin film with negative charges, diallyldimethylammonium chloride with positive charges and cadmium telluride quantum dots with negative charges, wherein the graphene-carbon nanotube composite thin film is used as a substrate; the diallyldimethylammonium chloride is electrostatically self-assembled on the substrate; and the diameters of the cadmium telluride quantum dots are in the range of 4 to 6nm. The preparation method disclosed by the invention has a simple process. The quantum dots of the obtained cadmium telluride quantum dot grafted graphene-carbon nanotube composite thin film optical switch material are uniformly dispersed on the film. The obtained cadmium telluride quantum dot grafted graphene-carbon nanotube composite thin film optical switch material has good environmental suitability and stable performance, has the advantages of optical and electric performances capable of being regulated and controlled by changing the type of the quantum dots and the amount of the quantum dots of a load, high photoelectric conversion rate, and the like, and is expected to be used for preparing a photoelectric conversion device with rapid photoresponse performance.

The invention discloses a three-junction laminated thin film solar cell, and belongs to the technical field of solar photovoltaics. The thin film solar cell aims at improving photoelectric conversion efficiency of the thin film cell and allowing the photoelectric conversion efficiency of the thin film cell to be approximate to that of a crystal cell. The thin film solar cell is characterized in that a top cell is an amorphous silicon solar cell, has an intrinsic layer energy gap of 1.7-1.8eV, and absorbs blue sunlight; the middle cell is a cadmium telluride cell, has an energy gap of about 1.45eV, and absorbs green light; and the bottom cell is a copper indium gallium selenide cell, has an energy gap of about 1.05eV, and absorbs red light. A middle layer is introduced, an optical path and optical trap structure is added, the light absorption efficiency is improved, the dividing precision can be improved by a step-by-step dividing method, the series connection and short circuit in a cell module are reduced, the product cost is lowered, and the reject rate is reduced.

A surface-enabled, metal ion-exchanging battery device comprising a cathode, an anode, a porous separator, and a metal ion-containing electrolyte, wherein the metal ion is selected from (A) non-Li alkali metals; (B) alkaline-earth metals; (C) transition metals; (D) other metals such as aluminum (Al); or (E) a combination thereof; and wherein at least one of the electrodes contains therein a metal ion source prior to the first charge or discharge cycle of the device and at least the cathode comprises a functional material or nano-structured material having a metal ion-capturing functional group or metal ion-storing surface in direct contact with said electrolyte, and wherein the operation of the battery device does not involve the introduction of oxygen from outside the device and does not involve the formation of a metal oxide, metal sulfide, metal selenide, metal telluride, metal hydroxide, or metal-halogen compound. This energy storage device has a power density significantly higher than that of a lithium-ion battery and an energy density dramatically higher than that of a supercapacitor.

A process for preparing a mesoporous material, e.g., transition metal oxide, sulfide, selenide or telluride, Lanthanide metal oxide, sulfide, selenide or telluride, a post-transition metal oxide, sulfide, selenide or telluride, and metalloid oxide, sulfide, selenide or telluride. The process comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic or lyotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to form the mesoporous material. A mesoporous material prepared by the above process. A method of controlling nano-sized wall crystallinity and mesoporosity in mesoporous materials. The method comprises providing a micellar solution comprising a metal precursor, an interface modifier, a hydrotropic or lyotropic ion precursor, and a surfactant; and heating the micellar solution at a temperature and for a period of time sufficient to control nano-sized wall crystallinity and mesoporosity in the mesoporous materials. Mesoporous materials and a method of tuning structural properties of mesoporous materials.

The invention discloses an efficient cadmium telluride nanocrystalline Schottky junction solar cell with a modified anode interface and a preparing method of the solar cell. The solar cell is formed by stacking a glass substrate, an anode, an anode interface layer, an optical activity layer and a cathode in sequence. The anode interface layer is added between the anode and the active layer so that anode work function control can be performed, and the anode interface layer is made from Au or MoOX or C60. Anode interface material has high work function. The anode interface material is deposited on an anode substrate in a vacuum evaporation mode or dissolved in organic solvent to prepare solution, and finally, the anode interface layer is formed on the anode substrate. The energy conversion efficiency of the cadmium telluride nanocrystalline Schottky junction solar cell can be obviously improved, the curling phenomenon of an I-V curve is avoided to some extent, the characteristic of a diode is enhanced, and the service life of devices is prolonged. According to the efficient cadmium telluride nanocrystalline Schottky junction solar cell with the modified anode interface and the preparing method of the solar cell, the preparing technology is simple, the main preparing process can be completed in a common fume hood through solution, and the manufacturing cost is greatly reduced.

The invention discloses an ultrafast synthetic method of a Ag2X block thermoelectric material. The ultrafast synthetic method is characterized in that Ag and an X elementary substance are taken as raw materials, high pressure is applied at the normal temperature after the raw materials are mixed uniformly, the mixed materials react and are densified by one step, and the Ag2X block thermoelectric material is prepared, wherein X is Se or Te. The densities of Ag2Se and Ag2Te blocks prepared by the ultrafast synthetic method are above 97%; the relevant preparation time is short, and a technology is simple; in addition, the problem of element volatilization in high-temperature synthetic processes of selenide and telluride is solved; accurate control on components and a microstructure is realized; the thermoelectric properties of obtained products are superior to those of products prepared by the traditional preparation method; ZTmax of obtained Ag2Se is equal to 0.65@107 DEG; ZTmax of obtained Ag2Te is equal to 0.7@127 DEG; and the ultrafast synthetic method lays a good foundation for large-scale preparation and large-scale application of Ag2Seand Ag2Te thermoelectric materials.

The invention provides a preparation method of cadmium telluride. The preparation method comprises the following steps: mixing tellurium and cadmium according to a specified molar ratio, wherein tellurium is excessive relative to cadmium; putting the mixed mixture of tellurium and cadmium into a crucible boat; putting the crucible boat into a quartz tube, vacuumizing, and sealing the quartz tube;putting the sealed quartz tube into a horizontal directional solidification furnace, and carrying out heating and heat preservation in a multi-section heating mode to enable tellurium and cadmium to react; after the reaction is finished, cooling the crucible boat, the quartz tube and the material in the tube to normal temperature, cutting the quartz tube open, taking cadmium telluride obtained through the synthetic reaction out, wherein the purity of the obtained cadmium telluride is 6N. According to the preparation method of cadmium telluride provided by the invention, firstly, the metal cadmium and tellurium are independently treated, so that no large vapor pressure is generated in the production process, and the possibility of pipe explosion in the production process is effectively prevented. Meanwhile, horizontal synthesis and horizontal directional solidification are combined to form one-step preparation of 6N and above high-purity cadmium telluride.