54 results about "Van der Waals force" patented technology

The invention relates to the technical field of electronic elements, in particular to a ternary compound for a memristor array and a preparation method of the ternary compound. The ternary complex comprises A, B and C, A is a guest molecule of a pyridine derivative with an amino terminal, B is a bridging molecule, and C is a host molecule with a cucurbituril structure. A, B and C are self-assembled in an aqueous solution through Van der Waals force and hydrophobic interaction among molecules to form a ternary complex; the host molecule C has a barrel-shaped cavity structure, and the guest molecule A and the bridging molecule B are included in the barrel-shaped cavity structure. The ternary complex forms a supramolecular chain junction at the end part of the graphene electrode, so that the graphene electrode with different gaps can be adapted, and the molecular connection success rate of the array is greatly improved. The preparation method of the ternary complex is simple, convenient, easy to operate and suitable for large-scale production.

The invention discloses a water treatment dosing method and dosing system based on alumen ustum detection, relates to the technical field of water treatment, and aims at monitoring equivalent parameters of alumen ustum forms in real time, enabling the alumen ustum forms to be equivalent to spherical particles and ignoring the influence of Brownian motion and fluid shearing on alumen ustum mechanics. Van der Waals force among alumen ustum particles is deduced according to equivalent parameters of alumen ustum forms, and then Zeta potential is deduced. The current metal particle concentration is determined according to the Zeta potential, and the steady-state dosage is adjusted according to the current metal particle concentration. According to the method, the DLVO mechanical field and the electrochemical potential distribution and control theory are fused, a multi-physics field coupling model is constructed, real-time updating of force field parameters under spatio-temporal data driving is achieved, a sensing-decision-execution closed-loop control chain is formed, and the system response speed is remarkably increased.

The invention relates to the technical field of manipulators with finger-shaped piece chucks, in particular to a magneto-rheological bionic bristle contact pad, a grabbing manipulator and a grabbing control method. According to the magnetorheological bionic bristle contact pad, Van der Waals force passively generated based on a bristle structure is organically combined with the characteristic that the state of the magnetorheological fluid can be rapidly changed, and rigidity control over bionic bristles is achieved by means of the characteristic of the magnetorheological fluid; when being applied to a manipulator, the self-adaptive grabbing device can be self-adaptive to the surface of a grabbed object and generate dry adhesion, the grabbing force can be accurately controlled and kept in the grabbing process, the self-adaptive grabbing device can be self-adaptive to the surface of the grabbed object, the surface of the grabbed object is not damaged, meanwhile, the grabbing force can be controlled in the grabbing process, and the grabbing efficiency is improved. And the grabbing quality and efficiency are improved.

A nonlinear optical crystal structure is provided. The nonlinear optical crystal structure includes a plurality of two-dimensional material films, wherein the plurality of two-dimensional material films are stacked in a direction perpendicular to a two-dimensional plane thereof, and two-dimensional material films adjacent to each other are bonded by van der Waals forces, each of the plurality of two-dimensional material films is a crystal with a center-inversion-asymmetric crystal structure, and has a predetermined lattice orientation parallel to the two-dimensional plane in a direction parallel to the two-dimensional plane, there is a non-zero twist angle between the two-dimensional material films adjacent to each other, and the twist angle is an included angle between predetermined lattice orientations of the two-dimensional material films adjacent to each other in the same two-dimensional plane, and a thickness of each of the plurality of two-dimensional material films is greater than 5 nm.

The invention belongs to the technical field of organic electronics, and discloses a preparation method of a spatially conjugated organic molecule based on a bis-hexaphenylbenzene anchoring group and application of the spatially conjugated organic molecule in the field of organic monomolecular wires. The space conjugated organic molecule based on the bis-hexaphenylbenzene anchoring group has a structure shown as I-II as follows: # imgabs0 # hexaphenylbenzene has a unique space conjugated structure, so that electrons can be transmitted not only along a valence bond conjugated channel, but also along a space conjugated channel, and the space conjugated organic molecule has a plurality of electric conduction channels, so that the space conjugated organic molecule can be used as a space conjugated organic molecule. Hexaphenylbenzene and a gold electrode are anchored through Van der Waals' force, and a molecular wire is constructed. The preparation method is simple and applicable, and has a good application prospect in the field of organic monomolecular wires.

The application discloses a method for constructing sub-nanometer plasmonic nanocavity, comprising the following steps: (1) preparing a flexible metal nanometer array film; (2) constructing a spacing layer on the exposed metal side of a flexible metal nanometer array film, and then placing another flexible metal nanometer array film on the exposed metal side of the spacing layer, so that the two flexible metal nanometer array films are adsorbed and attached by Van der Waals force, thereby obtaining a plasmonic nanocavity, which allows polarized excitation, realizes the enhancement of molecular signal and carries out the research on adsorption form. Compared with the chemical synthesis method, the application is more accurate and easy to realize in the control of structure gap, and the substrate is more uniform; compared with the nanometer gap prepared by photolithography and ion beam, the substrate process of the application is simple, easy to operate and short in time consumption, and the structure has a controllable sub-nanometer gap. The method has simple preparation process, high repeatability and stability.

The present invention provides a graphene nanoribbon embedded between two-dimensional material layers and a preparation method thereof. The structure of the graphene nanoribbon includes: a substrate with atomic-level flatness, formed by sequentially parallel stacking of at least two atomic layers, and the adjacent two atomic layers are bonded by van der Waals forces; at least one longitudinal section formed by extending the substrate by one or more atomic layer thicknesses along the thickness direction of the substrate from the substrate surface; at least one graphene nanoribbon that breaks through the van der Waals forces between any two adjacent atomic layers exposed at the longitudinal section and is embedded between the two atomic layers and encapsulated by the substrate material. The formed graphene nanoribbon is embedded in a substrate with atomic-level flatness and isolated from the external environment, enabling the graphene nanoribbon to have physical properties close to those of intrinsic nanoribbons and a regular edge structure; in addition, the preparation method is simple to operate, has a low cost, and can be mass-produced, having good industrialization value.

The application discloses a three-dimensional ferroelectric material based on two-dimensional ice stacking and preparation and application thereof, and belongs to the technical field of ferroelectric materials and multifunctional devices. The material is a three-dimensional periodic crystal structure of monoclinic P21 space group, water molecules in the material form a completely saturated network through hydrogen bonds, and there is no suspended hydrogen; interlayers are coupled through van der Waals force to form a multi-level cooperative ferroelectric sequence of "in-plane hydrogen bond ferroelectric + interlayer van der Waals ferroelectric". The material has the characteristics of a wide-bandgap semiconductor (band gap 5-6 eV), extreme anisotropic mechanical properties (Z-axis Young's modulus 48.6 GPa, Eyx=0.973), moderate bulk modulus (12.23 GPa), good acoustic performance (sound velocity 2638 m / s) and extremely high pressure stability (0-3000 GPa structure is complete, 1190 GPa metalization transition). The material can be widely applied in the fields of X-ray optical devices, ferroelectric memories, deep ultraviolet photoelectric detectors, extreme high-pressure sensors, directional stress sensors, mechanical logic devices, surface acoustic wave filters, multifunctional integrated microsystems and multi-parameter composite sensing networks, and opens up a new direction for pure water-based functional materials.

The invention relates to an intermolecular force adjusting method, a quantum simulation method, a quantum simulation device, quantum simulation equipment and a medium. The adjusting method comprises the following steps: determining a first vibration frequency of a target chemical bond in a target molecule; the mirror surface distance between two face-to-face reflectors arranged in the optical resonant cavity is adjusted, so that the second vibration frequency of the optical resonant cavity is the same as the first vibration frequency; injecting a target molecule into the optical resonant cavity; van der Waals force between target molecules is changed by finely adjusting the mirror surface distance between the two reflectors. According to the invention, the interaction force between ions (or molecules) trapped in the ion trap can be accurately adjusted, so that the fidelity of the quantum logic gate and the quantum entanglement efficiency are improved, the expandability of quantum calculation of the ion trap is realized, and crosstalk errors are reduced.

The invention discloses a multi-surface adhesion device with angle tolerance and an adhesion test system thereof, and relates to the technical field of bionic adhesion. The adhesion device comprises an upper substrate layer, a lower substrate layer, a buffer layer located between the upper substrate layer and the lower substrate layer, a bionic nano array layer arranged on the surface of the upper substrate layer and a connecting structure penetrating through the buffer layer. The bionic nano array layer is composed of mushroom-shaped microstructures, and lossless and reversible adhesion is achieved through Van der Waals force. The buffer layer can deform along with the angular deviation of the target surface, and an angle tolerance of 0-15 degrees is provided. The testing system comprises a fixing frame, a simple pendulum suspension mechanism, an angle adjusting structure and a collision impulse control structure, and is used for simulating working conditions under different angles and impact conditions and carrying out standardized quantitative testing on the adhesion performance. Repeatable and lossless adhesion of the surfaces of various materials is achieved, stable performance can be kept within the range of 120-150 DEG C, and the method is suitable for surface fixing, temporary mounting and reinforcing tasks in a complex environment.

The invention belongs to the field of selenium compounds, and particularly relates to a layered Cu2Se material and a preparation method and application thereof. The layered Cu2Se material comprises two layers of selenium and a Se-Cu-Se repeating layer unit formed by copper located between the two layers of selenium, wherein the atomic ratio of Cu to Se in the Se-Cu-Se repeating layer unit is 2: 1; and the Se-Cu-Se repeating layer units are repeatedly arranged in the thickness direction. According to the layered Cu2Se material, Se-Cu-Se is taken as a repeated layer unit, and layers are combined together by Van der Waals force, so that a layered quasi-two-dimensional structure with crystal preferred orientation is formed. The lamellar quasi-two-dimensional structure is relatively low in stripping energy and is about easy to strip, and Se becomes unstable after stripping, so that two-dimensional copper can be prepared.

The invention discloses a cucurbit [5] uril-based framework material as well as a preparation method and application thereof, and belongs to the crossing field of supramolecular chemistry and functional materials. The preparation method comprises the following steps: dissolving potassium salt and cucurbit [5] uril in distilled water; then adding a 3, 3 '-disulfo-[1, 1'-biphenyl]-4, 4 '-dicarboxylic acid ligand, and stirring to obtain a mixed solution; the mixed solution is subjected to a heating reaction, then cooling, filtering and drying are conducted, and the cucurbit [5] uril-based framework material is obtained, and the chemical formula is C396H360K18N180O198S18. Through coordination of an organic ligand containing a sulfonic acid group and metal ions, in combination with non-covalent interaction of hydrogen bonds, Van der Waals force and the like, and through optimal regulation and control of a material ratio, pH and temperature, a honeycomb three-dimensional porous framework structure with high stability is successfully constructed. By utilizing the fluorescence characteristic and the structural characteristic, the efficient recognition of Fe < 3 + > and Pb < 2 + > heavy metal ions and norfloxacin antibiotics in a water body can be realized. The problems that in the prior art, when heavy metal ions and antibiotics in water are detected, operation is tedious, and cost is high are solved.

The embodiment of the invention provides a composite fiber material and a preparation method and application thereof. The composite fiber material comprises: a substrate comprising cotton fibers; the active component is located on at least part of the surface of the substrate, the active component comprises a first active metal and a ligand, the first active metal comprises at least one of copper and iron, and the ligand comprises at least one of tetra (4-carboxyphenyl) porphyrin and 2, 3, 6, 7, 10, 11-hexahydroxybenzophenanthrene; the metal organic framework layer is connected with the active component through Van der Waals force, and the metal organic framework layer is a porphyrin metal framework layer. The composite fiber material provided by the embodiment of the invention can be used for preparing a sensor for detection of colorimetric / fluorescent bimodal sensing, and the detection limit and accuracy can be improved.

The invention provides a preparation method of an Au-ZnIn2S4 / MoS2 photoelectrochemical biosensor and an application of the Au-ZnIn2S4 / MoS2 photoelectrochemical biosensor. Comprising the following steps: step 1, preparing a ZnIn2S4 thin film; step 2, preparing a ZnIn2S4 / MoS2 composite thin film; and step 3, preparation of the Au-ZnIn2S4 / MoS2 photoelectrochemical biosensor. The invention also relates to an application of the Au-ZnIn2S4 / MoS2 photoelectrochemical biosensor. According to the preparation method, the MoS2 layer and the ZnIn2S4 thin film are efficiently combined to form a ZnIn2S4 / MoS2 heterojunction, so that the compounding of photo-induced electrons and holes is effectively inhibited; wherein Van der Waals force generated between the MoS2 layer and the ZnIn2S4 film is beneficial to adsorption of an aptamer of serotonin, so that the sensitivity and the specificity of the sensor are improved; in the combination process of the MoS2 layer and the ZnIn2S4 thin film, the hydrophilicity of the ZnIn2S4 thin film is improved by the MoS2 layer, so that serotonin is detected by the biosensor.

The invention relates to the technical field of biomedical detection, in particular to a preparation method and application of a biosensor for catalyzing hairpin assembly cascade amplification based on PDA-SiO2 nanoparticles. F-B-H1 and H2 free hairpin DNA probes of a 3 '-end fluorescence receptor (BHQ-1) are attached to the surfaces of the PDA-SiO2 nanoparticles, so that a PDA-SiO2 nanoparticle-based catalytic hairpin (CHA) probe is assembled through Van der Waals force between the PDA-SiO2 nanoparticles and a suspended single-chain part of the hairpin DNA probes. Based on target trigger signal amplification and the strong fluorescence quenching capability of PDA-SiO2, the method is used for ultrasensitively and conveniently monitoring CT-DNA in living cells; by integrating the PDA-SiO2 nano particles and the CHA technology, the low detection limit of the CT-DNA is realized.

The invention relates to the technical field of graphene nano composite materials, in particular to a graphene / metal nano composite material and a preparation method and application thereof, a plurality of nano metal particles are compounded on the surface of graphene powder, each nano metal particle is provided with at least one unsaturated d orbital domain, and the surface of each nano metal particle is provided with at least one unsaturated d orbital domain. The electrons of the unsaturated d orbital domain are coupled with the pi electrons on the surface of the graphene, and the graphene is intrinsic graphene. According to the graphene / metal nano composite material, bonding strength far higher than Van der Waals force can be formed by coupling electrons of unsaturated d orbital domains of metal particles and pi electrons on the surface of intrinsic graphene, the high quality of graphene can be maintained, the graphene can be tightly combined with the metal particles, and the graphene / metal nano composite material can be used for preparing the graphene / metal nano composite material. The electric conduction and heat conduction performance of the composite material is remarkably improved, and the calculation result of artificial intelligence multi-scale simulation is met.

The invention discloses a microsphere lens probe and a two-dimensional material transfer and performance test method based on the microsphere lens probe, and belongs to the technical field of micro-nano operation and characterization. The two-dimensional material in-situ multi-parameter testing method is provided for solving the problem that an existing two-dimensional material transferring mode can cause damage to materials and meeting the requirement for two-dimensional material in-situ multi-parameter testing. The center of the lower surface of the front end of a probe support of the microsphere lens probe is connected with the head end of a probe beam, the tail end of the probe beam is provided with a through hole, the lower portion of the through hole is correspondingly connected with a high-transmittance microsphere, and the high-transmittance microsphere is provided with a polymer soft substrate; the two-dimensional material transfer method is realized based on the microsphere lens probe, and comprises the following steps: fixing a two-dimensional material on a sample table, and enabling the sample table to reach a preset temperature; the microballoon lens probe is controlled to approach the two-dimensional material, Van der Waals force assisted nondestructive pickup of the two-dimensional material is realized by using the polymer soft substrate, and two-dimensional material transfer is realized. The device is used for operating and testing the two-dimensional material.

The invention relates to a Ti3C2Tx / Fe2O3 / CNTs humidity-sensitive material and a preparation method thereof, Ti3C2Tx is used as a template, through hydrothermal reaction with FeCl3, Fe2P3 is generated and is self-assembled to the surface of Ti3C2Tx, a Ti3C2Tx / Fe2P3 material is finally formed, the Ti3C2Tx / Fe2P3 material and a uniform aqueous dispersion of carbon nanotubes ( / CNTs) are fully mixed, the materials are assembled together through Van der Waals force, and the Ti3C2Tx / Fe2O3 / CNTs composite material is obtained. Ti3C2Tx has abundant surface properties and excellent structural stability, an ideal platform is provided for generation of Fe2O3 nanoparticles, and CNTs are connected with all Ti3C2Tx / Fe2P3 lamellar structures to form a continuous and stable conductive network. A network structure formed by connecting the CNTs is like an electron transmission'highway ', so that the overall resistance change of the material caused by water molecule adsorption / desorption can be extremely sensitively transmitted out, and the signal response of the sensor is amplified. According to the preparation method, the humidity sensitive material with high sensitivity and excellent responsiveness can be obtained, the preparation process is simple, and the humidity sensitive material can be practically applied to the fields of industry, environmental monitoring, medical treatment and the like.

The invention discloses a ferroelectric Cu-Asp MOF material. The crystal structure formula of the material is [Cu (Asp) (H2O)] infinity, cu < 2 + > in the asymmetric unit is in a hexa-coordinate irregular octahedral configuration, the crystal structure is a two-dimensional layered structure formed by assembling a one-dimensional chain structure under the action of Van der Waals force, then the two-dimensional layer is further stacked to form a three-dimensional blocky structure, the crystal of the material is rod-shaped, and the length is 50-1000 [mu] m; the preparation method comprises the following steps: step 1, preparing an anhydrous copper chloride solution and an L / D-Asp solution; 2, adding the L / D-Asp solution in the step 1 into an anhydrous copper chloride solution to obtain a mixed solution; step 3, dropwise adding a NaOH solution into the mixed solution to obtain a mixed solution with an acidic pH value; continuously reacting the mixed solution with acidic pH, and pouring out the supernate to obtain a blue rod-like single crystal; the Cu-Asp MOF prepared by the preparation method disclosed by the invention has the characteristics of high purity, high crystallinity and clear rodlike morphology; meanwhile, the method has the advantages of being easy to operate and environmentally friendly.

The application discloses a graphene preparation method based on interlayer stress resonance. Macroscopic mechanical rotation energy is converted into high-frequency and directional stress energy which can precisely act on the van der Waals force between graphite layers through a series of carefully designed physical processes. Under specific rotation conditions, unstable vortex structures (such as Taylor vortex flow) are generated in the confined fluid. When the stress wave formed by the vortex in the viscoelastic fluid is coupled with the intrinsic vibration frequency between the graphite layers, resonance phenomenon is triggered. The resonance can amplify the strain energy between the graphite layers, so that the interlayer van der Waals force is efficiently and selectively overcome under the condition of energy input far lower than the in-plane fracture threshold of carbon-carbon bond, and the graphene is exfoliated to obtain large and few-layer graphene.

The invention relates to a sensing layer, a humidity sensor comprising the sensing layer, a preparation method and application. The sensing layer has electric response to humidity change and is composed of a few-layer black phosphorus film layer and gold nanoparticles distributed on the few-layer black phosphorus film layer; and the gold nanoparticles are adsorbed on the black phosphorus film layer through Van der Waals force. According to the sensing layer with the electric response to the humidity change, the black phosphorus and the gold nanoparticles are utilized, the defect that the black phosphorus is prone to oxidation is overcome, the stability of the sensing layer in different environments (such as a use environment and a manufacturing environment) is improved, meanwhile, the humidity sensing performance of the sensor layer is improved, the resistance response is in the range of 1.8-10 kilohms, and the sensing layer has the good application prospect. The sensitivity is correspondingly in a range of 1500-4000%, and the stability reaches more than 7 days under the maximum relative humidity of 65%-90%.

The invention discloses a calixarene derivative and a preparation method and application thereof, the structure of the calixarene derivative is as shown in formula I: R1 is CO2-NH4 < + >; r2 is any one of straight-chain alkyl, branched-chain alkyl, straight-chain alkyl containing double bonds and branched-chain alkyl containing double bonds. According to the invention, iodobalix [4] arene and an alkynyl-containing phenyl compound are connected through a Sonogashira coupling reaction to construct an extended aromatic macrocyclic skeleton, and then an ionic water-soluble structure is obtained through upper edge ester group hydrolysis. The calixarene derivative has the following innovative advantages that the depth and the volume of a cavity are remarkably increased, and large-volume guest molecules can be efficiently included; the extended cavity realizes effective inclusion of guest molecules through hydrophobic interaction and Van der Waals force; an upper edge carboxylate radical ion group specifically recognizes a cationic object through electrostatic interaction, so that the multi-site recognition function of enzyme is simulated; the water solubility is enhanced, and the method is suitable for the biological medicine fields of drug delivery, ion sensing and the like.

The invention discloses a high-performance multispectral organic photoelectric detector based on cage molecule passivation, and belongs to the field of photoelectric detectors. The organic photoelectric detector comprises a metal electrode, an electron transport layer, a rear-end BHJ layer, a first cage-shaped molecule non-contact passivation layer, a carrier selective permeation layer, a second cage-shaped molecule non-contact passivation layer, a front-end BHJ layer, an electron transport layer and a transparent conductive substrate which are sequentially arranged from bottom to top, wherein the first cage-shaped molecule non-contact passivation layer and the second cage-shaped molecule non-contact passivation layer are made of Kuburg cage-shaped molecule series materials. The cage-shaped molecule non-contact passivation layers are formed on the front-end BHJ layer and the rear-end BHJ layer through spin coating, and the non-contact passivation layers effectively cover defect sites, such as unpaired free radicals, fracture bonds or impurity clusters, on the surfaces of the BHJ layers through physical adsorption or Van der Waals force, so that dark current is reduced, the high-noise spectral density is reduced, and the detection rate is improved.

The invention discloses a graphene preparation method based on interlayer stress resonance. Macroscopic mechanical rotation energy is converted into high-frequency and directional stress energy capable of accurately acting on Van der Waals force between graphite layers through a series of well-designed physical processes. Under a specific rotation condition, an unstable vortex structure (such as Taylor vortex) can be generated in a limited fluid, and when a stress wave formed by the vortex in a viscoelastic fluid is coupled with an intrinsic vibration frequency between graphite layers, a resonance phenomenon can be caused. The resonance can amplify the strain energy between the graphite layers, so that the Van der Waals' force between the layers is efficiently and selectively overcome under the energy input condition far lower than the in-plane fracture threshold of the carbon-carbon bond, the graphene is delaminated, and the large-piece and few-layer graphene is obtained.

The application provides a sample preparation method for fine samples, and belongs to the field of sample preparation. After pretreatment of the fine sample, a dispersing medium suitable for the mineral properties of the fine sample is selected and a dispersing agent is added to prepare a dispersion liquid. Then, the fine sample to be measured is added, and a sample suspension is prepared through stirring and segmented ultrasonic treatment. After adding a stabilizing agent and oscillation, drying is performed. The method can realize efficient and mild sample preparation for fine powder samples with a particle size of 1nm-100um. By adding the dispersing agent and the stabilizing agent, the surface tension between the fine sample particles can be effectively reduced, the agglomeration phenomenon caused by the van der Waals force, electrostatic attraction and other effects between the particles can be inhibited, the suspension stability of the fine sample in the dispersing medium can be improved, the fine sample can be uniformly dispersed, and the technical problems of uneven dispersion, fine sample structure damage and fine sample pollution caused by the easy agglomeration of the fine sample in the existing sample preparation method for fine samples are solved.

The application discloses a preparation method of a double-targeting graphene-based biological nanopharmaceutical transport system and application thereof. Graphite is dispersed in a mixed solution of sulfuric acid and phosphoric acid, and KMnO4 is added for reaction, and after the reaction, graphene oxide powder GO is obtained through treatment; the GO is dispersed in a solvent, and magnetic targeting molecules are generated on the surface of the graphene oxide through a chemical co-precipitation method, so that GO / magnetic nanoparticles are obtained; the GO / magnetic nanoparticles are dispersed in a polar solvent, and through covalent bond, electrostatic interaction, hydrogen bond and / or van der Waals force, a receptor-mediated active targeting molecule is fixed on the surface of the GO / magnetic nanoparticles, so that double-targeting modified graphene oxide composite material is obtained; the composite material is dispersed in a coupling agent and an activator, and a dicarboxylic acid compound containing a disulfide bond is added for reaction, and after the reaction, the double-targeting graphene-based biological nanopharmaceutical transport system is obtained through treatment and drying. The application constructs a graphene-based biological nanopharmaceutical transport system with high stability, strong targeting and controllable release capacity, and realizes efficient loading of drugs, tumor microenvironment response release and multi-target point synergistic precise delivery.

The invention belongs to the technical field of optical fiber sensors, and particularly relates to an optical fiber microcavity sensor for microplastic unmarked detection, a preparation method of the optical fiber microcavity sensor, an optical fiber sensing system and application. The optical fiber microcavity sensor comprises a surface hydroxylated optical fiber microcavity, a polylysine layer modified on the surface of the hydroxylated optical fiber microcavity, and a DNA aptamer combined on the polylysine layer. The configuration of the aptamer is soft and flexible, the aptamer can be matched with the surface appearance and characteristics of the micro-plastic to the greatest extent, the aptamer can be adsorbed with the micro-plastic through Van der Waals force and hydrophobic interaction, and the resonant wavelength change of the optical fiber micro-cavity sensor caused by specific binding of the aptamer adsorbed on the surface of the optical fiber micro-cavity and the micro-plastic is utilized for detection. The detection sensitivity to the microplastics is 95.6 nm / % in the range of 0.02-0.1% (w / v); the method has the advantages of good specificity, real-time monitoring, high sensitivity, no mark and capability of realizing in-situ detection of the micro-plastics in the water body.

The present invention relates to a method for regulating intermolecular forces and a quantum simulation method, device, equipment and medium, wherein the regulating method comprises: determining a first vibration frequency of a target chemical bond in a target molecule; adjusting the mirror spacing between two face-to-face reflectors arranged in an optical resonant cavity so that a second vibration frequency of the optical resonant cavity is the same as the first vibration frequency; injecting a target molecule into the optical resonant cavity; and changing the van der Waals force between target molecules by fine-tuning the mirror spacing between the two reflectors. The present invention can accurately regulate the interaction force between ions (or molecules) trapped in an ion trap, thereby improving the fidelity of quantum logic gates and the efficiency of quantum entanglement, realizing the scalability of ion trap quantum computing, and reducing crosstalk errors.

The invention discloses a spiropyrane-based dynamic photoresponse supramolecular lanthanide series metal gel material as well as a preparation method and application of the spiropyrane-based dynamic photoresponse supramolecular lanthanide series metal gel material, and belongs to the technical field of dynamic luminescent materials. A plurality of non-covalent interactions (hydrogen bonds, pi-pi accumulation, Van der Waals force and metal coordination) are introduced for coordination and ordered self-assembly to form the spiropyrane-based dynamic photoresponse supramolecular lanthanide series metal gel material, and the spiropyrane-based dynamic photoresponse supramolecular lanthanide series metal gel material belongs to supramolecular gel. Fluorescence resonance energy transfer between lanthanide ions (Tb < 3 + >) and spiropyrane ligand double-luminescence centers realizes dynamic fluorescence change under supramolecular gel time dependence, and a microenvironment of gel similar to a solvent is beneficial to rapid ring opening isomerization of the spiropyrane ligand, so that the prepared dynamic supramolecular gel material has the characteristics of obvious fluorescence color change, high contrast ratio, high sensitivity, high sensitivity and the like. The method has the advantages of high response speed and the like, and has wide application potential and prospect in the advanced anti-counterfeiting field.

The invention relates to a multi-component alloy two-dimensional van der Waals Ga-based magnetic crystal, preparation and application, and belongs to the technical field of nano magnetic materials. The magnetic crystal material is (Fe < 1-x > Ax) a (Ga < 1-y > By) b (Te < 1-z > Cz) c, wherein x, y and z are all greater than 0 and less than or equal to 0.9; a is equal to 2-6, b is equal to 0.1-2, and c is equal to 0.1-5; a is Ti, V, Cr, Mn, Cu or Zn, B is Al or In, and C is S, Se, Br, I or Sb. The multi-component alloy two-dimensional Van der Waals Ga-based magnetic crystal provided by the invention is a layered material, layers are connected through weak Van der Waals force, a multi-layer to single-layer nanosheet can be obtained through mechanical stripping, and a nano-scale spinning electronic device is easy to further prepare. According to different types and proportions of doped elements, the crystal respectively shows ferromagnetism or antiferromagnetism, and has a wide application prospect in spintronics.