130 results about "Ion distribution" patented technology

A system for controlling RF power supplies applying power to a load, such as a plasma chamber, includes a master power supply and a slave power supply. The master power supply provides a control signal, such as a frequency and phase signal, to the slave power supply. The slave power supply receives the frequency and phase signal and also receives signals characteristic of the spectral emissions detected from the load. The slave RF power supply varies the phase and power of its RF output signal applied to the load. Varying the power controls the width of an ion distribution function, and varying the phase controls a peak of the ion distribution. Depending upon the coupling between the RF generators and the load, different spectral emissions are detected, including first harmonics, second harmonics, and, in the case of a dual frequency drive system, intermodulation distortion.

A plasma reactor is described that includes a vacuum chamber defined by an enclosure including a side wall and a workpiece support pedestal within the chamber defining a processing region overlying said pedestal. The chamber has at least a first pair of ports near opposing sides of said processing region and a first external reentrant tube is connected at respective ends thereof to the pair of ports. The reactor further includes a process gas injection apparatus (such as a gas distribution plate) and an RF power applicator coupled to the reentrant tube for applying plasma source power to process gases within the tube to produce a reentrant torroidal plasma current through the first tube and across said processing region. A magnet controls radial distribution of plasma ion density in the processing region, the magnet having an elongate pole piece defining a pole piece axis intersecting the processing region.

The invention provides a lithium metal secondary battery negative electrode. The lithium metal secondary battery negative electrode comprises graphene foam and metal lithium compounded in the graphenefoam. The graphene foam is combined with the metal lithium, and the graphene foam is filled with the metal lithium; by taking the three-dimensional graphene foam as the framework, the liquid-state metal lithium can be automatically adsorbed in the three-dimensional graphene foam based on the lithium affinity property of the oxygen-containing functional group on the surface of reduced graphene oxide, while the three-dimensional graphene foam is formed by criss-cross flake graphene to form a porous structure, so that a relatively large specific surface area is formed, lithium can be well limited in the internal space, and volume expansion of a lithium negative electrode can be reduced; and meanwhile, the flake graphene also can influence the re-distribution of electric field in the battery,so that the lithium ion distribution on the surface of the electrode can be influenced, formation of dendritic crystal can be suppressed, improvement of the coulombic efficiency of the lithium negative electrode can be facilitated, and the obtained lithium metal negative electrode has relatively high flexibility.

The present invention relates to an ultraviolet detector and manufacture method thereof, in which a buffer layer is formed on a baseplate and a P-type GaN layer is formed on the baseplate by using epitaxial method. By availing ion-distribution-and-vegetation technology, a first N-type GaN layer is vegetated and invested in the P-type GaN layer by distributing and vegetating Si⁺ ions in that layer, and a second N-type GaN layer having a thicker ion concentration is invested in the N-type GaN layer. Finally, an annular and a circular metallic layer are formed between the P-type GaN layer and the first N-type GaN layer as well as inside the second N-type GaN layer, respectively, to serve for respective ohmic contact layers. The present invention is characterized in that an incident light can project upon a depletion layer of the GaN planar structure to have the detection efficiency significantly improved.

The invention discloses a composite separator for a lithium battery. The composite separator is applicable to a lithium ion battery or a metal lithium battery. The composite separator is formed by combining a substrate layer and an inorganic lithium ion conductor layer, wherein the inorganic lithium ion conductor layer employs an inorganic lithium ion conductor material with lithium ion conductivity larger than 1.0*10<-8>S cm<-1> under a temperature of 20-120 DEG C, the inorganic lithium ion conductor material exists in the substrate layer in a form of one or more of particle, cylinder, pipe and line, the substrate layer provides a basic separator framework, lithium ions can be induced to be uniformly deposited by the lithium ion conductor layer, and the mechanical property and the thermalstability of the separator are improved. The composite separator is simple in preparation method, lithium dendrites growth caused by non-uniform lithium ion distribution can be effectively suppressed, and the cycle efficiency and the safety of the battery within a wide temperature range are greatly improved; and by matching a high-capacity positive/negative electrode material, the cycle lifetimeof the lithium battery can be prolonged, the energy density and the safety of the lithium battery can be improved, and the industrial process is promoted.

The present invention discloses doped and modified lithium iron phosphate LiFePO4 preparing process, which includes the following steps: heating certain amount of deionized water and phosphoric acid to 60-90 deg.c in some reaction container, adding and dissolving cupric oxide powder, adding iron powder while stirring to react until reach pH 3-4, dropping lithium hydroxide solution slowly for complete reaction until reach pH 6.5-7, spray drying the resultant to obtain the precursor, and roasting at 700-800 deg.c to obtain doped and modified LiFePO4, with the whole process being completed under the protection of nitrogen. The present invention is one precipitating synthesis process capable of obtain LiFePO4 with small size, high purity and no hetero phase. Adding cupric oxide powder results in obvious doping effect and homogeneous doping ion distribution.

The invention discloses a method for inhibiting dendritic crystal growth when metal lithium is used as a battery negative electrode. The specific process of the method comprises the following steps: attaching a nitrogen-containing material to a substrate material with a three-dimensional bracket structure, and then depositing metal lithium between the nitrogen-containing material and the substratematerial. On one hand, the specific surface area of the electrode current collector can be increased, the actual current density of the electrode surface is reduced to prolong the dendritic crystal growth time, and dendritic crystal growth is inhibited; on the other hand, under the action of the protective layer, lithium ion distribution is adjusted, the phenomenon that the local lithium ion concentration is too high is reduced, dendritic crystal growth is inhibited, and meanwhile, the protective layer has the effect of physically inhibiting dendritic crystal growth.

In a plasma reactor chamber a ceiling electrode and a workpiece support electrode, respective RF power sources of respective VHF frequencies f1 and f2 are coupled to either respective ones of the electrodes or to a common one of the electrodes, where f1 is sufficiently high to produce a center-high non-uniform plasma ion distribution and f2 is sufficiently low to produce a center-low non-uniform plasma ion distribution. Respective center ground return paths are provided for RF current passing directly between the ceiling electrode and the workpiece support electrode for the frequencies f1 and f2, and an edge ground return path is provided for each of the frequencies f1 and f2. The impedance of at least one of the ground return paths is adjusted so as to control the uniformity of the plasma ion density distribution.

The invention relates to a photo-cured solid state composite electrolyte and a preparation method thereof, and belongs to the technical field of alkali metal batteries. The electrolyte is prepared byuniformly mixing a polymer prepolymer, a photoinitiator, an inorganic solid electrolyte, a salt and an ionic liquid in a light shielding condition, and then carrying out ultraviolet curing under an inert atmosphere. The electrolyte has gradient distribution characteristics due to the gravity sedimentation effect of the inorganic solid state electrolyte in the preparation process, so that the defect that the PEO is directly contacted with the positive electrode and is easy to oxidize can be solved; meanwhile, the metal ion distribution of the surface of the battery electrolyte and the surface of the metal negative electrode can be adjusted, high compatibility of the alkali metal negative electrode and the positive electrode is achieved, and relatively low over-potential and long-term cycling stability in the constant-current polarization can be shown; the impedance of the electrolyte and the electrode interface is relatively small, and the impedance is almost not increased along with the increase of the storage time of the battery; and the method has the advantages that the preparation process is simple, the conventional equipment is used, the raw materials are easy to obtain, the method is safe and pollution-free, and the method is suitable for large-scale batch production.

The invention discloses a device and method for instantaneous measurement of an ion velocity distribution function and belongs to the technical field of measurement of ion velocity distribution functions. The device and method for instantaneous measurement of the ion velocity distribution function aim to solve the problem that according to an existing multi-grid probe measurement method, in order to depict an iron distribution function, current is measured by continuously changing the adjustable voltage, and thus the iron distribution function cannot be measured in real time. According to the device for instantaneous measurement of the ion velocity distribution function, a direct-current power supply supplies an accelerating field to particles, a magnetic field coil provides a magnetic deflection field for the particles which are accelerated through the accelerating field, and a charge collection plate collects the moving particles with the moving direction changed through the magnetic deflection field. According to the method for instantaneous measurement of the ion velocity distribution function, the current density of particle beams at different positions is obtained through currents sensed by different particle collection areas on the charge collection plate, and thus the real-time ion velocity distribution function is obtained. The device and method are used for instantaneous measurement of the ion velocity distribution function.

The invention discloses an ion implantation analogy method, which comprises the following steps: firstly, getting the measured ion implantation distribution curve of the different ion implantation section; secondly, setting the analogue function with TCAD tool, fitting the distribution curve of the ion implantation, getting the distribution analogue basic curve of the ion implantation and acquiring the analog basic data; extracting the analog parameter from the analog basic data, acquiring the analog parameter data series by the analog calculation, forming the parameter matrix of the ion implantation; imitating the different ion implantation processes with the parameter matrix of the ion implantation and acquiring the distribution serial curve of the ion implantation; at last, getting the influence regularity of the ion implantation distribution in the material produced by the parameter variation of the ion implantation by the ion implantation distribution serial curve. The invention can provides the process control window of the ion implantation, which optimizes the process designing of the ion implantation, reduces the analog operating time, and reduces the research cost.

The invention provides a mass spectrometry detecting method for a serum polypeptides, comprising sample preparation, data-independent mass spectrometry acquisition, and data processing. According to the mass spectrometry detecting method for the serum polypeptides, a data-independent mass spectrometry acquisition method for serum peptidomics samples is developed, and the parent ion distribution ofthe sample by pre-analytical experiment on serum samples is obtained, thereby obtaining an optimal variable isolation window. Each condition and each step cooperate with each other by optimizing thepreparation method of the polypeptideomics sample, the mass spectrometry acquisition method, and the data processing method, and finally, the number of the detection of the polypeptide, the reproducibility of the identification, and the quantitative accuracy are significantly improved. The method of the invention has the characteristics of high throughput, high reproducibility, and high accuracy,and is suitable for analysis of large-scale clinical serum samples and detection of disease markers, thereby having wide application prospects and great market value.

The invention provides a charging effect simulation method at a tail region of a spacecraft. The method comprises the following steps: establishing a fitting expression of a polar region precipitated electron spectrum, which is the relation for the variation of aurora electron flux phi with energy E, wherein the relation is expressed through superposition of power law distribution phip (E), maxwellian distribution phim (E) and Gaussian distribution phiG (E), and fitting the polar region precipitated electron spectrum; establishing an ion distribution characteristic spectrum in a background plasma environment; testing secondary electron emission spectrums of different surface materials of the spacecraft; performing process simulation of the charging effect at the tail region of the spacecraft by using a Particle-In-Cell (PIC) method based on the three-category spectrum. The method has the advantages that the simulation process is clear, the simulation result conforms to the actual monitored charging situation and the like.

The invention provides a method of preparing an on-insulator material with an accurate and controllable stripping position, which comprises the following steps: S1, a Si substrate is provided, and a doped single crystal layer is grown epitaxially on the surface, wherein the thickness of the doped single crystal layer is more than 15nm; S2, a single crystal thin film is grown epitaxially on the surface of the doped single crystal layer; S3, a SiO2 layer is formed on the surface of the single crystal thin film; S4, ion injection is carried out to enable ion peaks to be distributed within a preset range below the SiO2 layer; and S5, a substrate whose surface is provided with an insulated layer is provided to be bonded with the SiO2 layer on the surface of the single crystal thin film to form a bonding sheet, annealing is carried out to enable the bonding sheet to be striped at a preset position, and the on-insulator material is obtained. Effects of absorbing the injected ions by the thick doped single crystal layer are used, the injection depth is controlled, a stripping interface is the upper surface of the doped single crystal layer, or the lower surface of the doped single crystal layer, or the ion distribution peak position, and the purpose of accurately controlling the stripping position is achieved.

The invention discloses a compound microprobe for in-situ measurement of STM image and chloride ion concentration distribution. The compound microprobe consists of a Pt microelectrode and an Ag microelectrode placed in parallel in double-tube glass tube to form the double electrodes. An end pipeline of the double-tube glass tube envelops segments of the Pt microelectrode and the Ag microelectrode by drawing. A tip of the double tube glass tube is grinded into a cone surface of 30 to 60 degrees. The tip surface of the Pt microelectrode and the tip surface of the Ag electrode are both exposed on the cone surface and the Ag microelectrode is located above the Pt microelectrode. The surface of the tip end of the Ag microelectrode forms an Ag or AgCl end surface by chlorination. The invention also provides a method of preparing the compound microprobe. The compound microprobe is high in measuring accuracy and easy to use, and has the functions of STM image scanning and micro-area two-dimensional chloride ion distribution measurement.

Imaging mass spectrometry (IMS) has become a prime tool for studying the distribution of biomolecules in tissue. Although IMS data sets can become very large, computational methods have made it practically feasible to search these experiments for relevant findings. However, these methods lack access to an important source of information that many human interpretations rely upon: anatomical insight. In this work, this need is addressed by (1) integrating a curated anatomical data source with an empirically acquired IMS data source, establishing an algorithm-accessible link between them; and (2) demonstrating the potential of such an IMS-anatomical atlas link by applying it toward automated anatomical interpretation of ion distributions in tissue.

The invention discloses a large-area ultrathin single crystal and a rapid growth method thereof. The method comprises the following steps of preparing flow matrix by utilizing phosphor powder and an oxide medium as raw materials or phosphor powder, an oxide medium and rare earth oxide as raw materials; and then performing crystal growth, thereby obtaining the single crystal. The method has the following advantages that luminescent ions are uniform in distribution and controllable in concentration, the single crystal is large in area and ultrathin, ultra-short in growth cycle, low in growth temperature, low in cost and high in yield.

The invention discloses a fluorescence labeling method for rapidly detecting the free calcium ion distribution in rice anther. The method comprises: (1) carrying out embedding freezing and slicing on rice anther, and pasting the slice containing the rice anther tissue onto a slide glass; (2) adding a Fluo-3AM fluorescence probe incubation liquid in a dropwise manner, carrying out dark incubation for 1-120 min in an incubator with a temperature of 4-37 DEG C, adding a fluorescence quenching slicing sealing liquid in a dropwise manner, and covering with a cover glass; and (3) observing the slice loading the Fluo-3AM fluorescence probe by using a fluorescence microscope. According to the present invention, the method is rapid and accurate, is suitable for the works requiring large batch detection and research, and can be applied to the detection of the free calcium ion distribution in other plant tissues.

The invention relates to zinc silicate manganese green emitting fluorescent powder and the manufacture method. It includes the following steps: adding SiO2 or silica slurry into zinc nitrate and urea water solution to make suspension, manganese sulfate solution, dropping excessive ammonia to generate precipitate; keeping temperature of precipitate in air or inert gas and gaining the fluorescent powder after processed. The feature is that the grain size is normally 1um, and has equally manganese ion distribution, and the keeping temperature declines about 200 degree centigrade. The invention has good emitting performance and persistent quality.

The invention relates to a diphenylethene group dual cyano benzene two-photon fluorescence probe for detecting and displaying intracellular Hg ions, and the probe is prepared by performing nucleophilic substitution on mercaptoethanol and 2,5-di(4-[di(2-chloroethyl)amino]styryl)para-phthalonitrile. Laser excitation of 810nm can avoid photoinduced toxicity of cells. In a range of pH being 4.5-13, the probe has good selectivity on the Hg ions, and Na, K, Ca, Mg and Mn ions have no interference with detection, and the Hg ions of micro molarity can be detected. Fluorescence intensity is reduced after complexing of probe molecules and the Hg ions, and the content of the Hg ions can be subjected to two-photon fluorescence detection. A two-photon fluorescence microimaging experiment shows that the probe has good permeability on fibroblasts and other cells, has no toxic or side effects on the cells and is particularly suitable for the detection of intracellular Hg ion concentration change and Hg ion distribution.