9 results about "Coulomb repulsion" patented technology

The application relates to a gold nanoparticle array preparation method with strong stability and reusability, high cysteamine-stabilized gold nanoparticles are prepared first, the spacing between the gold nanoparticles is changed by utilizing the coulomb repulsion between the gold nanoparticles, then the gold nanoparticle solution is added dropwise to a glass surface modified by gamma-glycidoxypropyltrimethoxysilane to react, stable covalent bonds are formed, and gold nanoparticle arrays with uniform distribution on the glass surface can be obtained after the reaction. The preparation does not require high temperature, the experimental operation is simple and convenient, the gold nanoparticles are arranged in order and closely, have high detection sensitivity, have strong ultraviolet absorption capacity, good stability, reusability, salt resistance and low background interference, and can be reused. The gold nanoparticle array can realize detection analysis on high-salt-content samples in surface-assisted laser desorption ionization mass spectrometry and be used for rapid analysis of small molecule compounds in positive and negative ion dual modes.

The invention belongs to the field of mass spectrum ionization, and particularly relates to a photoinduced Penning ionization mass spectrum method. Photoelectrons generated by a photoelectric effect accelerate in an electric field to obtain enough energy, helium He, neon Ne and argon Ar in ground states are excited to metastable states, and the energy of the metastable states of the neutral atoms is higher than 10.6 eV (He excitation energy is 20.62 eV and 19.82 eV); the excitation energy of Ne is 16.72 eV, and the excitation energy of Ne is 16.62 eV; the excitation energy of Ar is 11.72 eV and 11.55 eV), sample molecules with ionization energy higher than photon energy and incapable of being ionized by traditional photoionization can be ionized through Penning ionization, so that the reduction of mass spectrum resolution, sensitivity and quantitative capacity caused by a space charge effect caused by coulomb repulsion among too strong reagent ions in an ion transmission process is avoided, and the detection sensitivity is improved. And damage of too strong reagent ions to the ion detector. The sensitivity can be improved by about 5 times for sample molecules ionized by traditional photo ionization energy, such as toluene, with ionization energy lower than photon energy.

The present application relates to a method for compressing the divergence angle of electron beam by using a ring-shaped electron gun, which produces a peripheral ring-shaped electron beam by using a hollow ring-shaped cathode electron gun, and realizes effective control of the divergence angle of the electron beam by using the Coulomb repulsion of the inner electron beam, and can realize different compression amounts of the divergence angle by changing the current, energy and transmission distance of the outer electron beam.

The application relates to a solid-state electrolyte prediction screening method and system based on an improved bond valence site energy method, which comprises the following steps: obtaining the crystal structure of a solid-state electrolyte, constructing a three-dimensional calculation grid of a migration ion in a unit cell by using the crystal structure, calculating a global potential energy surface by using an improved BVSE model, and determining a migration energy barrier; the improved BVSE model is obtained by introducing a Coulomb repulsion term between migration ions in an original BVSE model; identifying migration ion sites based on the global potential energy surface, calculating the site energy of each migration ion site, obtaining characteristic Coulomb repulsion energy, and performing equivalent surface analysis and simple harmonic vibration analysis to obtain an equivalent surface surrounding volume and a site vibration frequency; and comparing the migration energy barrier, the characteristic Coulomb repulsion energy, the equivalent surface surrounding volume and the site vibration frequency with preset screening criteria to screen out potential solid-state electrolyte materials. The application can promote high-throughput screening of solid-state electrolyte materials.

Disclosed are a method for preparing a AgNPs@SASP substrate material and application thereof. The present disclosure uses cyclohexane as an organic phase and ethanol as an inducer, and uses the interfacial tension of an organic / water interface for self-assembly to arrange the nanoparticles in a single layer. The addition of a low-dielectric solvent as an inducer reduces the charge density on the nanoparticles. As a result, the van der Waals force combined with the reduction of the Coulomb repulsion force cause the nanoparticles to reassemble at the organic / water interface to form a new equilibrium, and a SERS platform of AgNPs in a two-dimensional array is prepared. SERS detection and peak attribution analysis of different food-borne pathogen spores are carried out, and qualitative analysis is carried out by a multivariate statistical method to realize the rapid identification of spore-forming bacteria.

This invention provides a method for sorting diamond micropowder morphology based on charged dispersion and rotating disk projectile, belonging to the field of diamond micropowder sorting technology. The method includes drying pretreatment, quantitative feeding, negative corona charging and deagglomeration, laminar flow steady-flow conveying, rotational acceleration and projectile sorting, zoned collection, electrostatic elimination and packaging, adaptable to sorting requirements with particle sizes ranging from 1 to 30 μm. It achieves non-destructive deagglomeration of agglomerates through the Coulomb repulsion force generated by controllable negative corona charging, and achieves precise crystal form separation by combining the aerodynamic trajectory differences of rotating disk projectile, while zoned collection ensures sorting consistency. This invention adopts a fully dry, continuous design, requiring no water or organic solvents. After sorting, the purity of each crystal form is ≥90%, and the crystal form integrity rate is ≥99%, solving the problems of low sorting accuracy and easy crystal form damage in existing technologies, and is suitable for large-scale industrial applications.

The invention provides a uniform humidification method and system based on negative ion boosting spraying. The method for adjusting the space humidity comprises the steps of environment parameter sensing, control parameter decision making, energizing water mist generation, space spraying and self-adaptive adjustment and humidification stopping. The provided space humidity adjusting system comprises a sensing module, a control module, a water system module, an ion system module and a coupling spraying module. According to the space humidity adjusting method and system, the water mist and the negative ions are combined to form the energizing water mist, water mist particles repel each other through coulomb repulsive force between the negative ions, continuous and driving diffusion power is obtained, the problem that a traditional humidifier is wet near and dry far is solved, and uniform humidity distribution of a large space is achieved.

The present disclosure provides methods and systems for generating heat from nuclear fusion. The methods and systems utilize host materials (such as metal nanoparticles) to host fusionable materials (such as deuterium). The host materials and / or fusionable materials are irradiated with electromagnetic radiation that induces phonon vibrations in the host material and / or fusionable materials. The phonon vibrations screen the Coulombic repulsion between fusionable material nuclei, thereby increasing a rate of nuclear fusion even at relatively low temperature and pressures. The methods and systems give rise to nuclear fusion reactions which produce energy or heat. The heat may be converted into useful energy using systems and methods for efficient heat dissipation and thermal management.

This invention relates to the field of additive manufacturing technology, specifically to an inorganic non-metallic particle-reinforced metal matrix composite material and its electron beam additive manufacturing method. This invention systematically solves the problem of powder blowing of dielectric insulating inorganic non-metallic particles in additive manufacturing by addressing electrostatic repulsion through surface metallization, mitigating thermal stress through composite powder optimization, and reducing heat input through process parameter control. It avoids the accumulation of surface charge in inorganic non-metallic particles under electron beam bombardment, which generates Coulomb repulsion and causes spatter leading to defects in the composite material, thus ensuring the uniform distribution of inorganic non-metallic particles during the printing process. Simultaneously, it solves the problem of large density differences between inorganic non-metallic particles and metal powder, leading to particle agglomeration or sedimentation and resulting in uncontrollable spatial distribution of the reinforcing phase. This has significant practical implications for the further application of high-volume-fraction inorganic non-metallic particle-reinforced metal matrix composites in electron beam additive manufacturing.