External direct current field self-assembly manufactured adjustable equal dimension triangular hole inorganic films

Soft chemistry method for preparing ultrathin HfO* or ZrO* gate dielectric membrane

The invention discloses a soft chemical method for making an ultrathin HfO2 or ZrO2 gate dielectric membrane. The method successfully prepares HfCl4 or ZrCl4 precursor sol with better stability and evenness through a simple and feasible technological line; moreover, the sol has longer storage life; an ultrathin HfO2 or ZrO2 membrane with a leveling-off surface is made on a Si substrate through adopting the precursor sol and the soft chemical method under room temperature; and a gate dielectric membrane with excellent electrical properties is obtained through post annealing. The method has simple making process and low cost and has superiority in the micro-electronic field, thereby having important application prospects.

Two-dimension non linearity optics ultra crystal lattice bistable device and making method

The present invention relates to a two-dimension nonlinear optical super crystal lattice bistable device and its manufacturing method. A crystal with larger Kerr effect coefficient is used, and in its interior a volume grating structure is etched. Said crystal can be selected from such crystals of lithium tantalate, potassium dihydrogen phosphate, lithium niobate, barium titanate, sodium tantalate and iron-doped and cobalt-doped crystals, also can be selected from ADP and barium titanate, etc. Its manufacturing method includes deep synchronous X photoetching technique, ion-beam etching, conventional volume holographic grating writing-in method and heat-fixing technique.

Tantalum-doped zinc oxide nano powder photocatalyst, preparation method and use thereof

The invention discloses a tantalum-doped zinc oxide nano-powder photocatalyst and a preparation method and application thereof. The preparation method for the photocatalyst comprises the following steps: soluble zinc salt is dissolved in deionized water to form a zinc salt solution, and proper amount of citric acid is added into the solution to obtain a transparent solution A; then proper amount of tantalum precursor solution is added with proper amount of glycol to form a solution B; the two solutions are mixed, added with PVP and nitric acid in the stirring process, and stirred for 0.5 to 1hour to obtain a transparent solution; the transparent solution is heated, evaporated to 50 to 70 percent of the prior mass, then added with a dispersant and a stabilizer, stirred, and then placed inthe air to be aged and dried to form a powder precursor; and then the annealing treatment is performed to obtain a sample. The photocatalyst can catalytically decompose an organic dye under sunlight,ultraviolet ...

Method for preparing multiple high-purity anisotropic gold nano particle

Soft chemistry method for preparing ultrathin HfO* or ZrO* gate dielectric membrane

Setting method of cascade connection superlattice laser and dual wavelength laser based on intermittent oscillation

The configuration method of a all-solid state white light laser based on intermittent-oscillation double-wavelength laser and cascade superlattice comprises following steps: constituting a efficient and stable white light laser by selecting a Nd<3+>-doped intermittent-oscillation double-wavelength laser as the fundamental wave light source and by adopting an optical superlattice with two different cascade structures as a nonlinear crystal to output red, green and blue laser beams in proper proportions; and disposing the optical superlattice with cascade structure in a temperature control furnace, wherein the optical superlattice has two segments; the first segment has a multichannel structure to achieve 1,319 nm frequency doubling and frequency tripling to obtain a 660 nm red light output and a 440 nm blue light output; the second segment is a periodical structure to achieve 1,064 nm quasi-phase matching frequency doubling to obtain a 532 nm blue light output; and the power ratio between ...

Method for synthesizing zinc oxide particle

The invention discloses a synthesis method of zinc oxide particles, which includes the following steps: preparing three elements solution of sodium hydroxide, polyvinylpyrrolidone and n-amyl alcohol; stirring zinc nitrate alcohol solution while adding the three elements solution, continuously stirring for 10 to 30 minutes at 30 to 40 DEG C, then standing silent for 24 to 72 hours; carrying out centrifugation on the reaction solution after standing and removing liquid, thereby, the zinc oxide particles of high purity are achieved. The invention uses the polyvinylpyrrolidone as promoting agent and guiding agent for the crystallization of oxide zinc, which not only realizes the crystallization of zinc oxide at room temperature, but also realizes the regulation of luminescence band-gap of zinc oxide particles through the simple change of experimental parameters to lead the free regulating of zinc oxide appearance among the structures of single layer, quasi double layer, double layer and one ...

Zinc titanite photocatalyst, preparation method and use thereof

The invention discloses a zinc titanite photocatalyst, as well as the preparation method and the application thereof. The preparation method of the zinc titanite photocatalyst comprises the following steps: firstly, a titanium source and dissolvable zinc salt are respectively dissolved in ethanol and ethylene glycol; then the two solutions are mixed; a bit of acetylacetone and surface active agent are added during the stirring process; and the reaction system is well mixed after 0.5-2 hours of stirring. The solution stands by in the air, and then reacts after 12-24 hours of aging; the reaction temperature is 160-190 DEG C; the reaction time lasts for 60-120 minutes; and then a white turbid solution is obtained. The reaction product is obtained by adopting the centrifugal separation technology; acetone is firstly used for ultrasonic cleaning; and then the reaction product is dried under 110-170 DEG C after ethanol is used for washing by 3-5 times, thereby a precursor powder can be obtained ...

Method for preparing adjustable uniform hole polystyrene monolayer film

The invention relates to a preparation method of a polystyrene single-layer film with adjustable even pores, which includes the following steps: first, polystyrene spherocolloid aqueous suspension with excellent monodispersity is diluted to 0.1 percent to 10.0 percent of volume fracton; the single-layer film which is lined periodically in long range order is formed by pulling a base with an improvement pulling method at a certain speed of 0.1 to 100 mu m/s which matches with the evaporating speed of a base liquid film solvent in the film formation environment. The polystyrene micro spheres ofthe single-layer film form triangular pores which are lined periodically and with the pore diameter adjustable by the solution of gel micro spheres with different diameter. The preparation method of the single-layer film with adjustable and even pores of the invention is simple and has high quality, and the pore diameter can be controlled conveniently.

Preparing rare-earth ion doped LN, LT optical super lattice material and its application

A pulling method or ordinary-temp polarization method for preparing the rare-earth ion (Er, Pr and Ho) dopped optical super-lattice LN or LT crystal is disclosed. Said super-lattice material integrates the excellent optical non-linear characteristics of LN or LT with rich optical spectrum of rare-earth ions, so it can realize quasi-phase matched frequency multiplication and the upper-conversion of frequency at same time, resulting in outputting upper-conversion and frequency-multiplyied light beams at the same time.

Zinc titanite photocatalyst, preparation method and use thereof

The invention discloses a zinc titanite photocatalyst, as well as the preparation method and the application thereof. The preparation method of the zinc titanite photocatalyst comprises the following steps: firstly, a titanium source and dissolvable zinc salt are respectively dissolved in ethanol and ethylene glycol; then the two solutions are mixed; a bit of acetylacetone and surface active agent are added during the stirring process; and the reaction system is well mixed after 0.5-2 hours of stirring. The solution stands by in the air, and then reacts after 12-24 hours of aging; the reaction temperature is 160-190 DEG C; the reaction time lasts for 60-120 minutes; and then a white turbid solution is obtained. The reaction product is obtained by adopting the centrifugal separation technology; acetone is firstly used for ultrasonic cleaning; and then the reaction product is dried under 110-170 DEG C after ethanol is used for washing by 3-5 times, thereby a precursor powder can be obtained ...

Method for generating high-frequency ultrasonic waves based on dielectric body superlattice

The invention discloses a method for generating high-frequency ultrasonic waves based on a dielectric body superlattice and belongs to the field of electroacoustic energy transduction. The superlatticThe invention discloses a method for generating high-frequency ultrasonic waves based on a dielectric body superlattice and belongs to the field of electroacoustic energy transduction. The superlattice takes a piezoelectric crystal as a medium. An arranged two-dimension modulating structure provides a plurality of reciprocal lattice vectors at the same time and can realize multidirectional multi-fe takes a piezoelectric crystal as a medium. An arranged two-dimension modulating structure provides a plurality of reciprocal lattice vectors at the same time and can realize multidirectional multi-frequency and multimode ultrasound output at high frequency in an alternative electric field, wherein the ultrasonic waves at different frequency have different propagation directions and can be used irequency ...

Period and field electrical funing method in quasi-phase matching optical parametric process and its application

A method for selectively applying electric field to super-lattice optical LN or LT material features that a periodical electric field is used during preparing specimen to modulate the refractivity of the specimen, realizing the electro-optical tuning of QPM optical parametric procedure and greatly increasing the tuning speed and precision of device. It can make the OSLLN or LT, or associated devices practical.

Preparation of super-lattice acoustic material and ultrahigh frequency acoustic device

Piezoelectric material is grown up on substrate. The piezoelectric material (including LiNbO3, LiTaO3, PbTiO3, BaTiO3, Li3BO7, SiO2, ZnO, PZT, TeO2, Bi12GeO20, and BisTiO4) and non-piezoelectric dielectric material (including MgO, TiO2, SrTiO3 and Al2O3) are selected and MOCVD method is used to grow one-by-one combined acoustic super-lattice material. It is also possible to grow any two piezoelectric materials. The period width is 0.1-3 micrometer and number of periods is 10-100.

Variable cycle acoustics superlattice and ultra-high-requency wideband acoustic/optical device

The ultra-high-frequency acousto-optic device made of acoustic super lattice material features that the device is made up of multi-layer composite material including ferroelectric single crystal with 180 deg. domain reversing structure, piezoelectric and non-piezoelectric materials prepared by MOCVD or PLD method, or piezoelectric materials with different piezoelectric coefficients, and acousto-optical interaction medium by cold-pressure welding of indium or ultrasonic welding. Conducting electrode is coated or grown on both surfaces of acoustic super lattice material.

Method for generating high-frequency ultrasonic waves based on dielectric body superlattice

The invention discloses a method for generating high-frequency ultrasonic waves based on a dielectric body superlattice and belongs to the field of electroacoustic energy transduction. The superlattice takes a piezoelectric crystal as a medium. An arranged two-dimension modulating structure provides a plurality of reciprocal lattice vectors at the same time and can realize multidirectional multi-frequency and multimode ultrasound output at high frequency in an alternative electric field, wherein the ultrasonic waves at different frequency have different propagation directions and can be used independently. The frequency, propagation direction and sound wave mode of high-frequency ultrasonic waves generated by the method can be designed and modulated by the two-dimension structure periodically and symmetrically. The method has the advantages of simplicity, high efficiency and integration.

Method for preparing single dispersion triangular nano silver slice

Preparation of submicron/micron micro lens array on polymer surface

Method for preparing micrometer and submicron probe arrays

The invention discloses a method of preparing a micrometer and sub-micrometer needle array. The method adopts the self-assembly technology and integrates the filling, cutting and controllable corrosion technologies. First, the self-assembly technology is adopted to technically assemble the micrometer/sub-micrometer fiber; and then the polymeric compound is filled, finally the micrometer and sub-micrometer needle array is prepared by the cutting and the controllable corrosion technologies. The invention has the advantages of low cost, no need of complicate equipments and technologies, capability of quick batch production, large area of needle array, smooth needle surface, adjustable diameter, length and taper, etc., and is widely applicable in the detecting, sensing, optical, biology and medicine fields, etc.

Method for preparing large-area two-dimensional super-structure material

The invention discloses a method for preparing a large-area two-dimensional super-structure material, comprising the following steps: large-area single domain two-dimensional packed hexagonal colloid crystal is arrayed on a substrate; the physical deposition method for angle identification is adopted, the colloid crystal obtained in the last step serves as a mask plate, triangular metal nano particles are deposited on the substrate by penetrating through pores among the colloid crystal microballoons; the colloid crystal microballoons are removed to obtain the super-structure material with the two-dimensional metal nano structure. In the invention, colloid microballoons of different dimensions can be chosen to conveniently regulate dot matrix period and size of the triangular; angle and time of nano particle deposit can be adjusted to control the length of the bottom margin of two partially overlapped subunits and the thickness of the subunits so as to adjust electromagnetic response of ...

Periodic metal/dielectric structural photon crystal with three-dimensional band gap and preparing mehtod thereof

具有三维光子带隙的周期金属/介电结构光子晶体及制备方法

In the present invention, the composite dielectric ball in metal/dielectric material is arranged according to close-packed mode at three-dimensional space. The core of this composite dielectric ball is spherical metal granule as outer layer is dielectric wrapping layer, or the core is supporting ball made of organic or inorganic material, middle sandwich layer is metal ball shell and outer layer is dielectric wrapping layer.

Method for preparation of quasi-period micron super crystal lattice and its application on laser frequency conversion

The present invention relates to a quasiperiodic arrangement method of quasiperiodic micron superlattice, and it is characterized by that it uses electric domain of ferroelectric domain monocrystal material to make guasiperiodic structure, and the selection of the quasiperiodic parameters is implemented under the condition of that the reciprocal space and reciprocal lattice vector meet the phase-matching in parametric process for coupled laser. Its applicable parametric process includes double frequency, sum frequency, difference frequency and optical parametric amplification and oscillation.Said invented use value lies in that it finds out a method capable of simulaneously meeting phase-matching of several parametric processes, and uses single crystal to implement the above-mentioned several processes, and can obtain high effective output.

Method for preparing large-area two-dimensional super-structure material

The invention discloses a method for preparing a large-area two-dimensional super-structure material, comprising the following steps: large-area single domain two-dimensional packed hexagonal colloid crystal is arrayed on a substrate; the physical deposition method for angle identification is adopted, the colloid crystal obtained in the last step serves as a mask plate, triangular metal nano particles are deposited on the substrate by penetrating through pores among the colloid crystal microballoons; the colloid crystal microballoons are removed to obtain the super-structure material with thetwo-dimensional metal nano structure. In the invention, colloid microballoons of different dimensions can be chosen to conveniently regulate dot matrix period and size of the triangular; angle and time of nano particle deposit can be adjusted to control the length of the bottom margin of two partially overlapped subunits and the thickness of the subunits so as to adjust electromagnetic response of the ...

Preparing of rare-earth iron doped LN, LT optical super lattice material and its use

Method for enwrapping ferric oxide by silicon dioxide

The invention discloses a process for coating ferric oxide with silicon dioxide, which comprises the procedures that ferric oxide particles are homogeneously dispersed into mixed solution of ethanol and ammonia, then the mixture is added into n-pentanol solution of polyvinylpyrrolidone in the condition of stirring, the mixture is continuously stirred for 6-24hours, after the reaction liquid is centrifugated, the fluid portion is removed, thereby ferric oxide particles coated by silicon dioxide are achieved. The invention employs restriction of polyvinylpyrrolidone to water and perfect adsorption effect of polyvinylpyrrolidone to ferric oxide, successfully locates hydrolysis reaction of ethyl orthosilicate on the surface of the ferric oxide, thereby the ferric oxide is coated homogeneously. Thickness of layer of the silicon dioxide can be constantly increased by simply increasing mass ratio of ethyl orthosilicate and ferric oxide particles. The invention has the advantages of low costs and ...

构筑二维有序分布硅量子点图形化纳米结构的方法

A method for building two-dimension orderly distributed Si quantum spot graphic nanameter structure is to process a phase-shift grating form board on the film of a-Si or a-SiNx: H/a-Si: H/a-SiNx: H then to crystallize it by laser interference, the laser beam arrives at surfaces of a-Si film or a-SiNx: H/a-Si: H/a -SiNx: H via the form board to form beam spots of two dimension periodic distribution of the energy density to make a -Si: H film to realize localized crystallization, that is to form nanometer Si quantum spot array of two-dimension space orderly distributed in the film.

A work electrode of dye sensitization solar battery

The invention discloses a working electrode of a dye-sensitized solar cell, which is characterized in that the interior of the working electrode of the dye-sensitized solar cell is added with a conductive micro-channel so as to enhance capture and collection efficiency of electron and avoid electron hole recombination, thus improving the efficiency and other performance indicators of the solar cell. The invention has novel design and feasible preparation, therefore the invention is an effective way for improving the efficiency of the dye-sensitized solar cell.

Method for preparing single-phase BiFeO3 ceramics through hardening process

The present invention relates to a method for preparing single-phase BiFeO3 ceramic by utilizing quenching process. It is characterized by quickly cooling sintered BiFeO3 ceramic. Said method includes the following steps: weighing Bi2O3 powder and Fe2O3 powder according to the mole ratio of 1:1, ball-grinding for 4-12 hr according to 100-500 rpm, uniformly mixing two powdes, drying the above-mentioned mixed powder, pressing the mixed powder into thin sheet, then placing proper quantity of the above-mentioned mixed powder into Al2O3 crucible, placing the thin sheet into the crucible, and using correspondent powder to cover the thin shet to make the thin sheet and powder be in sealed state, then placing the above-mentioned crucible into heating furnace, heating to sintering temperature, heating speed is 2-8 deg.C/min, sintering temperature is 830-920 deg.C and sintering time is 30-60 min., after sintering process is completed, promptly quenching so as to obtain the invented product.

Method for preparing micrometer and submicron probe arrays

The invention discloses a method of preparing a micrometer and sub-micrometer needle array. The method adopts the self-assembly technology and integrates the filling, cutting and controllable corrosion technologies. First, the self-assembly technology is adopted to technically assemble the micrometer/sub-micrometer fiber; and then the polymeric compound is filled, finally the micrometer and sub-micrometer needle array is prepared by the cutting and the controllable corrosion technologies. The invention has the advantages of low cost, no need of complicate equipments and technologies, capability of quick batch production, large area of needle array, smooth needle surface, adjustable diameter, length and taper, etc., and is widely applicable in the detecting, sensing, optical, biology and medicine fields, etc.

Preparing LT, doping LN crystal with periodic electric domain at room temp. and use

The scheme solved by the invented technology adopts 0.2-0.5 mm thickness LT cut or doped LN single-domain chip, the minus or plus C surfaces are all finish ground and polished, On+ C surface the metal grid with A=3-20 mu meter period is made as electrode by utilizing photolithographic technique, the flat electrode is plated on the corresponding region of -C surface. High voltage rectangular pulse is positively applied between the two electrodes, its intensity E=20KV-30KV/mm. The applied time is the pulse width and is about 10 ms-1s.

A surface plasmon crystal and a preparation method thereof

Preparing LT, doping LN crystal with periodic electric domain at room temp. and use

Tantalum-doped zinc oxide nano powder photocatalyst, preparation method and use thereof

The invention discloses a tantalum-doped zinc oxide nano-powder photocatalyst and a preparation method and application thereof. The preparation method for the photocatalyst comprises the following steps: soluble zinc salt is dissolved in deionized water to form a zinc salt solution, and proper amount of citric acid is added into the solution to obtain a transparent solution A; then proper amount of tantalum precursor solution is added with proper amount of glycol to form a solution B; the two solutions are mixed, added with PVP and nitric acid in the stirring process, and stirred for 0.5 to 1 hour to obtain a transparent solution; the transparent solution is heated, evaporated to 50 to 70 percent of the prior mass, then added with a dispersant and a stabilizer, stirred, and then placed in the air to be aged and dried to form a powder precursor; and then the annealing treatment is performed to obtain a sample. The photocatalyst can catalytically decompose an organic dye under sunlight, ultraviolet ...

Method for preparing triangular nano palladium slice

Method for preparing adjustable uniform hole polystyrene monolayer film

The invention relates to a preparation method of a polystyrene single-layer film with adjustable even pores, which includes the following steps: first, polystyrene spherocolloid aqueous suspension with excellent monodispersity is diluted to 0.1 percent to 10.0 percent of volume fracton; the single-layer film which is lined periodically in long range order is formed by pulling a base with an improvement pulling method at a certain speed of 0.1 to 100 mu m/s which matches with the evaporating speed of a base liquid film solvent in the film formation environment. The polystyrene micro spheres of the single-layer film form triangular pores which are lined periodically and with the pore diameter adjustable by the solution of gel micro spheres with different diameter. The preparation method of the single-layer film with adjustable and even pores of the invention is simple and has high quality, and the pore diameter can be controlled conveniently.

Method for enwrapping ferric oxide by silicon dioxide