105 results about "Molecular self-assembly" patented technology

The invention belongs to the technical field of perovskite solar cells, and provides a dibenzofuranyl carbazole derivative and a preparation method and application thereof.The dibenzofuranyl carbazole derivative takes dibenzofuranyl carbazole as a functional group, molecular ordered accumulation is optimized, and hole mobility is remarkably improved; an alkyl carbon chain is used as a linking group, a phosphate group at the tail end is an anchoring group, perovskite interface defects can be effectively passivated, the energy loss at the interface can be reduced, single molecule self-assembly can be realized, the cell performance can be improved, and as a self-assembly monomolecular layer hole transport material, a perovskite solar cell has relatively high photoelectric conversion efficiency, and the photoelectric conversion efficiency can be improved. The service life is long; and the stability is high.

The invention provides a self-assembled monomolecular layer hole transport material based on a polycarbazole derivative and a preparation method and application thereof, and the self-assembled monomolecular layer hole transport material has a structure as shown in a formula I. The self-assembled monomolecular layer hole transport material is simple in structure, high in hole transport property, strong in interface passivation ability, high in thermal stability, and suitable for large-scale application; a polycarbazole derivative is taken as a mother nucleus, an alkyl / aryl chain is taken as a linking group, phosphoric acid is taken as an anchoring group, and rigid conjugated large-plane polycarbazole with a specific structure is taken as the mother nucleus, so that molecular accumulation can be improved, and the hole transport performance of the material can be improved. By taking a phosphate group as a tail end, single-molecule self-assembly can be realized, a perovskite interface can be passivated, the energy loss at the interface is reduced, and the battery performance is improved.

The invention provides a laminated solar cell and a preparation method and application thereof. The laminated solar cell comprises a bottom cell, a tunneling composite layer and a top cell which are laminated in sequence, the tunneling composite layer comprises a first single-molecule self-assembly layer and a second single-molecule self-assembly layer which are arranged in a stacked mode in the direction away from the bottom cell, and the first single-molecule self-assembly layer and the second single-molecule self-assembly layer transmit charges with opposite electrical properties. The first single-molecule self-assembly layer and the second single-molecule self-assembly layer which are opposite in electrical property are introduced to serve as tunneling composite junctions in the laminated solar cell, tunneling recombination of carriers between the top cell and the bottom cell can be achieved, and the laminated solar cell has the advantages of being low in material cost, low in parasitic absorption, low in damage to a substrate and the like; therefore, a good foundation is laid for the preparation of a high-efficiency and low-cost laminated solar cell, and the laminated solar cell has excellent photoelectric properties.

The invention relates to the field of electrochemiluminescence imaging analysis, and particularly discloses a single-particle electrochemiluminescence imaging method by adjusting the thickness of a molecular self-assembly layer, which is used for solving the problems of serious non-specific luminescence of an electrode substrate, incapability of finely regulating an interface structure, poor stability and the like in single-particle electrochemiluminescence imaging. The method comprises the following steps: preparing an insulating molecule self-assembly layer with gradient thickness, optimizing a fixing process of gold nanoparticles, determining the position of a single particle, carrying out ECL imaging acquisition on the single particle, and optimizing the thickness of the molecule self-assembly layer. According to the method, the thickness of a molecular self-assembly layer is precisely regulated and controlled, a nano-particle fixing and ECL system is optimized, and a single-particle ECL imaging device is built, so that the signal-to-noise ratio of single-particle electrochemical imaging can be increased, and background interference caused by non-specific luminescence of an electrode substrate is effectively inhibited.

The invention discloses a high-dispersion cobalt-based catalyst and a preparation method and application thereof, and belongs to the technical field of cobalt-based catalysts.The preparation method comprises the steps that tetracarboxyl cobalt phthalocyanine and nitrogen-defect carbon nanotubes serve as raw materials, a pre-assembled compound is formed in an organic solvent through molecular self-assembly, then programmed microwave heating is conducted on the pre-assembled compound, and the high-dispersion cobalt-based catalyst is obtained. According to the high-dispersion cobalt-based catalyst and the preparation method thereof disclosed by the invention, a means of combining a specific molecular precursor and carrier defect engineering is utilized, a'molecular anchor-anchor positioning 'pre-connection system is constructed through liquid-phase pre-assembly, and a programmed microwave energy accurate input principle is supplemented, so that the high-dispersion cobalt-based catalyst is obtained. The key technical problems that when the cobalt-based catalyst is prepared through an existing microwave method, metal atoms are prone to agglomeration, the active site structure is uncontrollable, and the catalytic performance is ordinary are successfully solved.

The invention discloses a multi-stage cooperative processing technology for a tinned pin oxide layer of a plastic package device, and belongs to the technical field of electronic component packaging. The process comprises the following steps of: (1) low-temperature plasma pretreatment: under a vacuum condition, adopting mixed gas of argon and nitrogen, and generating plasma through a radio frequency power supply to carry out irradiation treatment on the surface of a pin; (2) composite reduction treatment: soaking the device in a citric acid-ascorbic acid composite solution with the pH value of 2.8-3.5; and (3) molecular self-assembly protection: carrying out surface coating by adopting an ethanol solution of gamma-aminopropyltriethoxysilane, and curing to form an anti-oxidation protection layer. According to the method, effective removal and protection reconstruction of the oxide layer are achieved through a three-stage cooperative processing mechanism, the pin welding qualification rate can be increased to 98.5% or above, and the temperature in the processing process is always lower than the glass-transition temperature of a plastic packaging material.

A near-atomic-scale electrolytic machining method based on an interface self-assembly biomask comprises the steps that firstly, hydroxylation pretreatment is conducted on the surface of an anode of a workpiece, then the surface of the anode is covered with an organic solvent phase containing phospholipid monomers, water-phase electrolyte drops are introduced, molecular self-assembly driving force at an oil-water-metal three-phase interface is utilized, and the surface of the anode of the workpiece is subjected to near-atomic-scale electrochemical machining. And rapidly forming a layer of ultrathin, continuous and stable support phospholipid bilayer mask on the surface of the workpiece in situ. Then, biological nanochannels are embedded in the biomimetic mask to construct a confinement ion transport path. And finally, a precise pulse electric field is applied, electrolyte ions are driven to be strictly limited in the nanometer channel and transmitted to the surface of the workpiece, local anodic dissolution is triggered, and therefore localized material removal of the nanometer scale or even the near-atomic scale is achieved. According to the method, the technical bottleneck that the high-quality phospholipid bilayer is difficult to prepare on the high-surface-energy metal surface is solved, and a new way is provided for ultra-precision electrolytic machining.

The present invention belongs to the field of biomedicine. Provided are an organic molecular self-assembly serving as a carrier-free system, and a preparation method therefor and the use thereof. Provided is a self-assembly, which is composed of steroidal molecules, and by means of optimizing the molecular structures of these steroids and critical aggregation concentrations thereof, a carrier-free system formed via self-assembly of the steroidal molecules is prepared. The carrier-free system can be loaded with a drug to prepare a drug nanocomposite. In the nanocomposite, the efficacy of the drug is improved, and the effects of reducing toxicity and improving efficacy can be achieved. If the steroid molecules used are themselves biologically active, the pharmacological activity of the steroid molecules remains unaffected after being prepared into the drug nanocomposite. The carrier-free system has the advantages of both a carrier-free nano-preparation and a nano-preparation using a conventional material as a carrier.

The invention relates to the field of biological materials, in particular to an amphiphilic block copolymer self-assembled biomimetic membrane and a molecular membrane anchoring method and application. Wherein the biomimetic membrane is formed by self-assembly of membrane forming molecules; the film-forming molecule comprises an amphiphilic triblock copolymer, the configuration of the amphiphilic triblock copolymer is a hydrophilic chain segment A-hydrophobic chain segment B-hydrophilic chain segment A, and the amphiphilic triblock copolymer is modified by an organic silicon surfactant and then is self-assembled into the amphiphilic triblock copolymer biomimetic film. And the biological nanopore protein is promoted to be embedded into the biomimetic membrane by adopting anchoring molecules through a molecular membrane anchoring method, so that the application of the biomimetic membrane in preparation of a biosensor is realized. An organic silicon surfactant is added as a bridge, polarity repulsion between the substrate and the polymer is eliminated, and the triblock polymer is stably attached to the surface of the substrate. Anchoring molecules are adopted to form covalent bonds with the surface of the membrane and biomacromolecules to realize anchoring, so that the stability is extremely high, the elution resistance and the environmental interference resistance are high, and the method is suitable for biosensors.

The invention discloses a supramolecular self-assembled fiber as well as a preparation method and application thereof in cells. The supramolecular self-assembled fiber is obtained by mixing a cis, cis-cyclohexane-1, 3, 5-triformyl hydrazine mother solution, a p-formylphenylboronic acid mother solution and a 5-(2-aminophenyl) tetrazole mother solution in a phosphate buffer solution; the application of the supramolecular self-assembled fiber in cells comprises the following steps: inoculating a pore plate with Haila cells, gently and horizontally shaking, culturing, washing, incubating in a complete DMEM (Dulbecco Modified Eagle Medium) solution of 5-(2-aminophenyl) tetrazole, and washing to obtain pretreated cells; and further incubating and washing the pretreated cells in a complete DMEM (dulbecco's modified eagle medium) solution containing cis, cis-cyclohexane-1, 3, 5-triformyl hydrazine and p-formylphenylboronic acid, so as to obtain the cells enriched with the boron element. Compared with a small molecular boron carrying agent, the supramolecular self-assembled fiber prepared by the invention realizes effective boron element enrichment, and has the advantages of high affinity to tumor cells, good stability and low biotoxicity.

The application discloses a kind of iron monatomic catalysts with controllable sulfur content and coordination mode and its preparation method and application, nitrogen-allyl thiourea and thiocyanic acid are respectively used as sulfur-containing organic ligand and sulfur-containing supramolecular precursor, chelate with iron ion, and use the hydrogen bond interaction between melamine and cyanuric acid, complete supramolecular self-assembly process;And high-temperature pyrolysis is carried out under argon atmosphere, and iron monatomic catalysts with controllable sulfur content and coordination mode can be prepared.The application also includes the application of iron monatomic catalysts with controllable sulfur content and coordination mode in removing organic pollutants such as p-chlorophenol and antibiotics in water.Iron monatomic catalysts with controllable sulfur content and coordination mode can improve the activation efficiency of persulfate, the content and selectivity of active oxygen species generated, and achieve efficient degradation of p-chlorophenol under different anion-cation, humic acid and pH conditions, while having good recycling performance.

The invention discloses a flaky supramolecular chiral copper catalyst based on molecular self-assembly and application thereof, and belongs to the technical field of asymmetric catalysis, the flaky supramolecular chiral copper catalyst is prepared by the following preparation method: dissolving L-ThrC10-20 in a solvent, and stirring to obtain a methanol solution of the L-ThrC10-20; adding ultrapure water into the system, and stirring to obtain a sheet-shaped supramolecular assembly body L-ThrC10-20-NS; and adding Cu < 2 + >, and stirring to obtain the flaky supramolecular chiral copper catalyst L-ThrC16-NS-Cu (II). According to the invention, the flaky supramolecular chiral copper catalyst L-ThrC10-20-NS-Cu (II) assembled on the basis of L-ThrC10-20 and Cu < 2 + > is successfully constructed for the first time, and the catalyst shows obvious enantioselectivity in a Diels-Alder reaction and can be used for efficiently catalyzing to generate an S-endo configuration product.

The invention provides a retarder, retarded acid and a preparation method and application thereof, and relates to the technical field of acidification transformation of carbonate reservoirs in oil and gas field development, the retarder comprises the following components in percentage by mass: 50%-70% of a main polymer, 15%-25% of a film-forming acceleration component, 10%-15% of an acid-resistant stable component and 5%-10% of a dispersing aid; the main body polymer is a quadripolymer and is formed by copolymerizing a cationic monomer, a bidentate anchoring monomer, a supramolecular self-assembly monomer and an acid-resistant monomer, the cationic monomer is methacryloyloxyethyl trimethyl ammonium chloride or acryloyloxyethyl trimethyl ammonium chloride, the bidentate anchoring monomer is phthalic anhydride modified acrylate, and the supramolecular self-assembly monomer is a supramolecular self-assembly monomer. The supramolecular self-assembly monomer is carbamido ethyl methacrylate, and the acid-resistant monomer is 2-acrylamide-2-methylpropanesulfonic acid; the retarder is obviously superior to the conventional retarded acid in the aspects of stability, film-forming speed, retarding effect, effective acting distance and reservoir protection.

The invention relates to an environment intelligent response type easily-degradable coated controlled-release fertilizer for dry farmland and a preparation method of the easily-degradable coated controlled-release fertilizer. The easily-degradable coated controlled-release fertilizer is prepared by uniformly spraying a layer of controlled-release coating material which is sensitive to temperature and humidity on the surfaces of urea or compound fertilizer particles. The coating material is prepared from a temperature and humidity dual-sensitive composition and an interpenetrating network polymer through an emulsion interfacial polymerization reaction under a heating condition. The temperature and humidity double-sensitive composition is formed by molecular self-assembly of a temperature and humidity low-sensitive organic material and a temperature and humidity high-sensitive organic material; the invention fundamentally solves the problem that the controlled-release fertilizer is difficult to release at low temperature and drought in spring and quick to release at high temperature and high humidity in summer on dry field crops, is more accurate in nutrient supply and demand matching, can realize that the fertilizer is only applied once per plant under the condition of high and stable yield of the dry field crops, and can meet the requirements of simultaneous sowing of seed and fertilizer and lateral deep fertilization; the method has the outstanding advantages of time saving, labor saving, fertilizer saving, easy degradation of the membrane material, environmental friendliness and the like, and has a very wide application prospect.

The invention belongs to the technical field of solar cells, and discloses a perovskite solar cell and a method for improving thermal management of the perovskite solar cell. A high-thermal-conductivity p-type inorganic spinel mineral material CuBi2O4 is doped in an organic hole transport layer micromolecule self-assembly material of the perovskite solar cell to form an organic-inorganic mixed hole transport layer; the device is optimized by regulating and controlling the proportion of the organic micromolecule self-assembly material to the organic micromolecule self-assembly material, and the defect that the heat conduction efficiency of the organic micromolecule self-assembly material is poor is overcome. An inorganic material with high thermal conductivity and an organic material with low thermal conductivity are mixed, the organic-inorganic mixed hole transport layer is prepared by adopting a spin coating process, and the mixed transport layer can effectively transfer heat energy generated by the perovskite solar cell in a photoelectric conversion process to an electrode. While the efficiency of the perovskite solar cell is improved, the thermal management capability of the perovskite solar cell is enhanced, and the operation stability is improved.

The preparation method of the agar nanogel interface modification spray is prepared from the following raw materials by weight: agarose 35-70 parts, Tween 80 40-50 parts, dimethyl silicone oil 60-150 parts, and tetrahydrofuran 50-120 parts. The preparation method comprises the following steps: S1: placing agarose into heated deionized water to obtain an agarose aqueous solution, adding Tween 80 and dimethyl silicone oil to obtain a coarse emulsion; S2: ultrasonic dissolving the coarse emulsion to obtain a fine emulsion, cooling and centrifuging, taking the lower liquid, adding tetrahydrofuran to obtain an agar nanogel mixture; S3: rotary evaporation and drying the mixture to obtain agar nanogel; and S4: adding the gel into ethanol or water to obtain the agar nanogel interface modification spray. The agar nanogel spray formed based on the molecular self-assembly strategy has a hexagonal phase columnar structure, the spray can form a modified layer with excellent light-heat conversion efficiency and water transport performance on the water surface, and can significantly enhance the evaporation efficiency.

The invention discloses a wafer-level ultra-flat clean graphene electron microscope grid and a preparation method and application thereof. The method comprises the following steps: placing a target transmission electron microscope grid on the surface of a two-dimensional material on a hard growth substrate; a substance capable of generating molecular self-assembly is dissolved in a low-surface-tension organic solvent to prepare a fitting solution, the fitting solution is dropwise added to the surface of the structure, and tight fitting at the normal temperature is achieved after the solution is volatilized; etching to remove the hard growth substrate; and finally, washing with deionized water and isopropanol. According to the method disclosed by the invention, by utilizing the self-assembly effect of molecules and the characteristic of a low-surface-tension solvent, glue-free and normal-temperature transfer is realized, polymer residues are avoided, and the ultra-flatness and high cleanliness of the graphene surface are ensured; the method has the advantages of high universality, simple process and high yield, and is particularly suitable for batch production of 4-inch wafers.

The application discloses a kind of high-stable carbene-alkynyl probe molecule self-assembly interface and preparation method thereof, and systematically proposes the stability change of highly ordered monomolecular self-assembly interface under different experimental environments.The construction method includes: design and synthesis have with carbene-alkynyl as bonding assembly group probe molecule (CB-C≡C);Second, CB-C≡C molecule is self-assembled on gold nano surface by gold-carbene bond, gold-alkynyl bond, forms gold-carbene-alkynyl trident assembly sensing interface.And by electrode surface in situ combination ferrocene (Fc) electrochemical response group, generate gold-carbene-alkynyl-Fc molecular self-assembly interface, and systematically evaluate in different determination environments containing high concentration glutathione (5-10mMGSH), 25-50 DEG C, pH2-10 Interface high stability.The application utilizes this new CB-C≡C self-assembly molecular probe can realize high-stable determination under different determination environments for up to 90 days.

The invention belongs to the technical field of molecular electronics, and particularly relates to a method for constructing a fixed-area molecular tunnel junction and an electrical property testing method.The method comprises the steps that a circular array mask is prepared, a gold target is deposited on the surface of a glass sheet, and a circular gold array is obtained; the gold-glass transparent array electrode is soaked in a molecular solution, when molecule self-assembly is completed, the surface is washed and dried, and the gold-glass transparent array electrode with the surface containing a self-assembly monomolecular film is obtained; preparing a gallium-indium alloy electrode; the gold-glass transparent array electrode is placed on an objective table, the tip of the gallium-indium alloy electrode is in contact with the circular gold array, the other end of the gallium-indium alloy electrode is led out to be in contact with the metal probe electrode, a current test loop is formed, and a fixed-area molecular tunnel junction is formed; compared with a traditional metal electrode, the gold-glass transparent array electrode has the advantage that adverse factors such as personal errors of molecular junction electrical property test results are effectively reduced.

The invention relates to a supramolecular self-assembly hydrophobic surfactant as well as a preparation method and application thereof, and belongs to the technical fields of supramolecular self-assembly, surface modification engineering and hydrophobic coatings. The surfactant comprises a fluorine-containing compound and absolute ethyl alcohol, and the fluorine-containing compound is self-assembled in the absolute ethyl alcohol to form uniformly dispersed nano small particles; the fluorine-containing compound is obtained by reacting 4-aldehyde imidazole with hexamethylene diisocyanate and then grafting the reaction product on 1H, 1H, 2H, 2H-perfluoro-1-alcohol. Self-assembly in absolute ethyl alcohol is achieved through non-covalent interaction of fluorine-containing compounds, a nano-scale lotus leaf bionic structure is constructed, and the nano-structure material has hydrophobicity and also has a lotus leaf-imitated microcosmic hydrophobic structure and has good hydrophobicity. And when the catalyst is used for Al surface modification, the hydrophobic protection performance of Al can be improved, and a large number of active sites are reserved.

The invention relates to the field of batteries, and particularly discloses a reversed-phase micro-micelle electrolyte system for an aqueous battery as well as a preparation method and application of the reversed-phase micro-micelle electrolyte system. The electrolyte system is composed of tris (trimethylsilane) phosphate, isopropanol, metal salt and water, and a reverse micelle structure with the average hydration size of 1-2 microns is formed through molecular self-assembly among the components. The unique structure limits water molecules in micelles and near an electrode interface, and cooperates with a firm SiO2-P2O5 inorganic interface layer generated on the surface of an electrode in situ to jointly inhibit side reactions such as decomposition of water, so that an electrochemical stability window of an electrolyte system at-20-60 DEG C is 5.0-6.0 V. When the composite material is applied to a water-based zinc ion battery, the super-long cycle life under high voltage and wide temperature range can be realized at the same time, and a new scheme is provided for developing a water-based energy storage device with high performance and high safety.

The application discloses a kind of self-assembly hydrogel, preparation method and application, belong to material field.The application claims to protect a kind of self-assembly hydrogel, it is formed by glycyrrhizic acid, five gallate glucose and paeonol by molecular self-assembly;Wherein, the mass ratio of glycyrrhizic acid and five gallate glucose, paeonol is (10~60) :(1~8) :(2~8).The self-assembly hydrogel provided by the application is suitable for skin, raw material is natural, biocompatibility is good, mechanical and storage stability is excellent, can release paeonol and the transdermal effect is good, three components synergistically improve atopic dermatitis and other skin inflammation, and clinical value is high.In addition, the preparation process of the self-assembly hydrogel of the application is simple, can be prepared using conventional one-pot method, easy to produce.Therefore, the self-assembly hydrogel of the application has the prospect of developing into paeonol sustained-release delivery system, paeonol transdermal sustained-release preparation or skin inflammation treatment drug.

The present disclosure pertains to a 3D scaffold for cell growth and proliferation. In particular, the present disclosure provides a method of producing an artificial 3D scaffold to support stem cell growth and later their differentiation, by converting biodegradable amphiphilic copolymers (star polymer) into nanowire scaffolds, through a molecular self-assembly process. The invention also relates to the use of said scaffold for cell culture and / or transplantation.

The invention provides a self-assembled monomolecular layer hole transport material of an indenocarbazole derivative and a preparation method and application thereof, the hole transport material has a structure shown in a formula I. The self-assembled monomolecular layer hole transport material is simple in structure, high in hole transport property, strong in interface passivation ability and high in thermal stability, and can be applied to the field of hole transport. Indenocarbazole with a rigid conjugate large plane is used as a parent nucleus, so that molecular accumulation can be improved, and the hole transport performance of the material can be improved. By taking a phosphate group as a tail end, single-molecule self-assembly can be realized, a perovskite interface can be passivated, the energy loss at the interface is reduced, and the battery performance is improved. When the synthesized material is used as a hole transport layer of an inverted perovskite solar cell, gt can be obtained without doping; and meanwhile, the service life of the perovskite solar cell is greatly prolonged, the stability of the perovskite solar cell is greatly improved, and industrialization of the perovskite solar cell is expected to be achieved.

This invention belongs to the field of flame retardant polymer materials, and specifically relates to a phytic acid-modified piperazine pyrophosphate and zinc borate synergistic flame retardant polypropylene and its preparation method. The composition by mass percentage is: polypropylene (PP): 73-75%; phytic acid-modified piperazine pyrophosphate (PM@PAPP): 24-26%; zinc borate: 0.5-2%. This invention uses piperazine pyrophosphate as the core and, through a liquid-phase supramolecular self-assembly process, in-situ coats the surface with a supramolecular network formed by phytic acid and melamine to prepare a core-shell structured phytic acid-modified piperazine pyrophosphate. This core-shell structure is then compounded with zinc borate, and melt-blended and hot-pressed to obtain a flame-retardant polypropylene composite material. This composite material improves the compatibility between the material and the flame retardant, inhibits the release of toxic fumes, and forms a continuous, dense char layer, enhancing the material's thermal stability and fire safety performance. It solves the problems of traditional flame retardants, such as large dosage requirements, easy migration, insufficient foaming, and poor smoke suppression effects.

A method for preparing an MOFs flame retardant modified by layer-by-layer self-assembly of an intumescent flame retardant is provided. The method mainly includes the steps of preparing MOFs, a positive electrolyte solution, and a negative electrolyte solution; dispersing the MOFs in the negative electrolyte solution; dispersing an obtained mixture in the positive electrolyte solution; obtaining a first double-molecule self-assembled layer on surfaces of the MOFs; and repeating the above operations for several times to obtain an MOFs flame retardant modified by intumescent self-assembled layers. The modified MOFs flame retardant of the present disclosure has excellent flame retardancy, flame retardant synergism, and dispersibility, and the defects of poor dispersibility and low flame retardant efficiency of MOFs flame retardants are overcome. A great application prospect is achieved.

The invention relates to the technical field of papermaking, in particular to a preparation method of ultrathin high-strength paper-based adhesive tape base paper. The preparation method comprises the following steps: mixing softwood pulp and hardwood pulp, forming base paper by adopting a double-net dehydration process, and forming a covalent cross-linked network in a paper sheet by adopting a cellulose reactive coupling agent with an o-benzoquinone structure and a multi-sulfydryl compound based on a sulfydryl-benzoquinone click chemistry and interface supramolecular assembly multi-bonding enhancement system; meanwhile, a dual intelligent enhancement system based on a biomacromolecule self-assembly body and a dynamic metal coordination network is established, and dynamic reversible crosslinking is constructed through a polyelectrolyte compound and a Fe < 3 + >-tannic acid coordination network; a multifunctional surface treatment technology combining a zwitterionic polymer brush and bionic in-situ mineralization is developed, a sulphobetaine methacrylate polymer brush grows through a surface-initiated atom transfer radical polymerization method, amorphous silicon dioxide is induced to be mineralized, and the adhesive tape body paper prepared through the method is high in strength.

The application relates to a preparation method of an Sb4 self-assembled structure and belongs to the technical field of nanometer materials. A gold single crystal substrate is prepared; antimony powder is evaporated and deposited on the gold single crystal substrate to obtain a substrate and Sb4 molecular self-assembled chains deposited on the substrate, and the deposition process controls the temperature of the gold single crystal substrate to be 25-30 DEG C; the substrate and the Sb4 molecular self-assembled chains deposited on the substrate are subjected to first temperature rising to a growth temperature for heat preservation treatment to obtain small-area and dispersed Sb4 molecular self-assembled islands; then, the small-area self-assembled islands prepared are used as nucleation sites for growth, that is, the antimony powder is evaporated and deposited on the surface of the gold single crystal substrate with the small-area self-assembled islands to obtain a gold single crystal substrate with coexistence of small-area Sb4 molecular self-assembled islands and Sb4 molecular self-assembled chains, and the deposition process controls the temperature of the substrate to be 25-30 DEG C; the obtained gold single crystal substrate with coexistence of small-area Sb4 molecular self-assembled islands and Sb4 molecular self-assembled chains is subjected to second temperature rising to a growth temperature for heat preservation treatment to obtain large-area Sb4 molecular self-assembled islands. The Sb4 molecular self-assembled structure prepared by the application has regular shape structure, and the width of the self-assembled structure is mostly above 100 nm.

Disclosed is an electro-femtofluidic flow sensor that infers volumetric flow by translating pressure-induced membrane deflection into resistance changes measured with Wheatstone bridge circuitry (300). The device comprises first and second membranes (102, 104) enclosing an electrically conductive fluid (110); first and second Wheatstone bridges (300), each having a variable resistor Rv formed by a portion of the electrically conductive fluid (110) and fixed resistors R1-R3; and at least one processor (302) that, when the sensor is fluidically connected in series with a flow channel carrying a fluid, computes membrane deflection from bridge outputs and estimates flow rate. To address in-situ nanoprinting feedback and control on opaque substrates used in molecular self-assembly, the electro-femtofluidic flow sensor enables femtoliter-per- second measurements. By enabling real-time, ultralow-flow sensing under opaque conditions, the approach may support new nanofabrication modalities and the creation of molecular-level machines for biomedical and other applications.