638 results about "Self assembled" patented technology

The invention belongs to the technical field of perovskite solar cells, and provides synthesis and application of a novel self-assembled monomolecular hole transport material with conjugated extended tail ends. According to the self-assembled monomolecular hole transport material, a carbazole group is used as a terminal core, an aromatic ring is introduced to the terminal of carbazole to extend a conjugated structure, an alkyl chain is used as a connecting unit, phosphoric acid or acetic acid is used as an anchoring group, and the self-assembled monomolecular hole transport material with conjugated extended terminal is formed. And the stability, the hole transport property, the hole extraction capability and the interface passivation capability of the material are improved. Experiments show that the self-assembled monomolecular hole transport material has an HOMO energy level matched with a perovskite layer, and hole transport is facilitated. When the self-assembled monomolecular hole transport material disclosed by the invention is applied to a trans-perovskite solar cell with a band gap of 1.53 eV, the photoelectric conversion efficiency as high as 26.11% is obtained, and excellent device stability is shown.

The invention belongs to the technical field of micro-nano processing, and particularly relates to a preparation method and application of a metal micro-nano tube array. Comprising the following steps: preparing a metal layer on the surface of a substrate; coining glue is sprayed on the surface of the metal layer, then coining is conducted through a template, and a micro glue column array is formed after curing; a plasma etching process is adopted, the micro glue column array is used as a mask, the metal layer exposed out of the gaps in the bottom of the micro glue column array is etched, and a structure with the micro glue columns wrapped by metal is formed; and removing the rubber columns in the structure of the metal-coated micro rubber columns to obtain the metal micro-nano tube array. According to the invention, a residual-layer-free imprinting technology is adopted, the problem of glue layer residue in traditional imprinting is avoided, and the etching uniformity is improved. A plasma dynamic balance process is adopted, the side wall redeposition effect of etching by-products is utilized, and the metal micro-nano tubes are formed in a self-assembly mode. The prepared metal micro-nano tube array has high aspect ratio compatibility, and the nano tube array with the aspect ratio as high as 10: 1 can be realized.

The invention discloses a modified hole transport layer and a preparation method thereof, a perovskite solar cell and a power utilization device, and belongs to the technical field of solar cells. The modified hole transport layer comprises a hole transport layer and a modified layer arranged on the surface of one side, far away from a substrate, of the hole transport layer; the material of the hole transport layer comprises a self-assembly single-layer material and an organic amine salt; and the material of the modified layer comprises organic amine salt. The organic amine salt is used as an additive to modify the self-assembled single-layer material to prepare the hole transport layer, and the organic amine salt is further used as a surface treating agent to modify the hole transport layer, so that the problems of distribution uniformity and surface wettability of the self-assembled single-layer material can be solved; the efficiency of the large-area perovskite assembly is effectively improved, and the large-area processing requirement is met.

The invention discloses a perovskite solar cell, a preparation method thereof, a cell module and a laminated cell. The perovskite solar cell comprises a composite hole transport layer and a perovskite light absorption layer, the perovskite light absorption layer is located on one side of the composite hole transport layer, and the composite hole transport layer comprises polyvinyl acetate and an SAM material. Therefore, the polyvinyl acetate is of a cross-linked network structure and can play a role in stabilizing the SAM material and inhibiting the SAM material from diffusing to the perovskite light absorption layer, so that the stability of the self-assembled monomolecular layer is improved, and the stability of the perovskite solar cell is improved; in the perovskite solar cell, carbonyl oxygen in polyvinyl acetate can be coordinated with uncoordinated metal ions in the perovskite light absorption layer to realize passivation of a bottom interface of the perovskite light absorption layer, so that interface recombination is reduced, and the performance of the perovskite solar cell is improved.

The invention provides a self-assembled hypha flexible carbon electrode material and a preparation method and application thereof, and belongs to the technical field of battery packs. The preparation method of the self-assembled hypha flexible carbon electrode material comprises the following steps: treating basswood with white rot fungus mycelia, crushing and roasting to obtain porous basswood / hypha composite carbon powder; and putting the porous basswood / hypha composite carbon powder and a carbon nanotube into a sterilized conical flask containing a potato glucose culture solution, inoculating gloeophyllum trabeum, performing activation culture, adding a dopamine hydrochloride aqueous solution, performing polymerization after ultraviolet irradiation, taking out and tabletting to obtain the self-assembled hypha flexible carbon electrode material. In the preparation process of the self-assembled hypha flexible carbon electrode material, the flexible carbon electrode material is synthesized by taking porous basswood / hypha composite carbon powder as a matrix, taking gloeophyllum trabeum hypha as an adhesive, taking polydopamine as a reinforcing agent and adding carbon nanotubes as a conductive reinforcing material, so that the technical problem of poor cycle performance of a lithium ion battery is solved.

The invention discloses a modified thermal insulation coating and a preparation method and application thereof, and belongs to the field of building energy-saving materials. One modified compound is a thermo-sensitive polyelectrolyte layer-by-layer self-assembled alumina microsphere formed by alternately depositing polyethyleneimine and polyacrylic acid through electrostatic interaction, and the polyelectrolyte layer can dynamically swell or shrink along with the temperature to adjust the heat conductivity coefficient; and the other is magnesium silicate nanofiber coated with silicon dioxide and then grafted with fluorosilane, the hydrophobicity is improved by utilizing the low surface energy of the fluorosilane, and meanwhile, the binding force with a polymer interface is enhanced. The coating further comprises fumed silica, a dispersing agent, a defoaming agent and other auxiliaries. The preparation method comprises the following steps: sequentially adding the components into a high-speed dispersion machine, mixing, adjusting the viscosity, filtering and packaging. The coating has the advantages of intelligent temperature-sensitive adjustment, low heat conductivity, strong adhesion and weather resistance; the material is suitable for long-acting heat preservation in the fields of buildings, industrial equipment and cold chains.

The invention discloses a preparation method and application of circumferentially limited supercritical foaming self-packaging TENG, and the preparation method comprises the following steps: uniformly mixing a PDMS precursor and a curing agent, pouring the mixture into a mold, and putting the mold into a vacuum oven for curing to obtain a PDMS film; adhering the PDMS film to the middle position of the PI film through a double-sided nickel conductive adhesive tape, then putting the PDMS film into a mold, putting a thermoplastic elastomer on the upper layer, and performing hot pressing by using a vacuum auxiliary hot press to obtain a prefabricated sample; putting the prefabricated sample into a supercritical foaming reaction kettle, controlling the temperature to 70-130 DEG C, injecting supercritical fluid into the foaming reaction kettle, after the prefabricated sample and the supercritical fluid form a saturated and stable blending system, maintaining for 0.8-1.5 hours, taking out the blended system, and naturally cooling to room temperature, so as to obtain the TENG. The preparation method has the beneficial effects that the self-assembled and self-packaged TENG with the bionic dome structure is successfully prepared through cooperation of a supercritical fluid technology and a limited foaming strategy, and the technical scheme of the self-assembled and self-packaged TENG obtains breakthrough progress in the aspects of the preparation process, the structural design and the environmental adaptability.

The invention provides a trans-perovskite solar cell containing a fluorine arene phosphoric acid function compensation layer and a preparation method thereof, and the solar cell comprises a conductive substrate, a hole transport layer, a self-assembly monomolecular layer, a function compensation layer, a light active layer, an electron transport layer, a hole blocking layer and a back electrode which are sequentially stacked from bottom to top. The material of the function compensation layer is fluorine-containing aromatic hydrocarbon phosphoric acid. The fluorine-containing aromatic phosphoric acid provided by the invention can make up the anchoring defect on the basis of a self-assembled monomolecular layer, and can effectively passivate the defect at the bottom of perovskite through a plurality of active sites at the same time; the problem of non-ideal performance and stability caused by excessive defects at the self-assembled monomolecular layer / perovskite buried bottom interface of the trans-perovskite solar cell is solved, and a valuable scheme is provided for commercialization of the trans-perovskite solar cell in the future.

The invention relates to a high-throughput screening method and system for a self-assembled single-layer thermal interface material and a medium. The high-throughput screening method comprises the following steps: constructing an interface heat transport simulation system based on a self-assembled monomolecular layer; screening set preparation is carried out on the end group structure, and an end group screening set and a pre-calculation set are constructed; carrying out molecular dynamics simulation on the self-assembled monomolecular layer corresponding to the pre-calculation set to obtain a physical association index; training a machine learning model by taking the physical association index as a machine learning objective function; carrying out machine learning prediction on the uncalculated screening candidate data set based on the trained machine learning model, and carrying out parallel screening of physical association indexes to obtain a simulation verification set; and carrying out molecular dynamics simulation for verification. Compared with the prior art, high-throughput screening of the self-assembled single-layer thermal interface material is achieved, and the method has important significance on solid-liquid interface heat conduction characteristic regulation and control design under data driving.

The invention discloses a method for preparing a silicon-carbon composite negative electrode material through an electrostatic self-assembly technology, and belongs to the technical field of lithium ion battery negative electrode materials. According to the invention, lignin is used as a biomass carbon source and lauryl sodium sulfate (SDS) and poly (diallyldimethylammonium chloride) (PDDA) are used as activators through a simple electrostatic self-assembly technology; a proper amount of nano silicon and PDDA are subjected to in-situ adsorption, and lignin and SDS are subjected to in-situ adsorption; a self-assembly process is carried out through the positive and negative charge attraction effect among colloidal particles, so that effective compounding of the nano silicon particles and the biomass carbon is realized; and performing vacuum drying, and performing one-stage sintering in a tubular furnace to obtain the silicon-carbon composite negative electrode material. Based on the problems of non-uniform particle size, easy agglomeration and great abrasion of a silicon-carbon composite material in a traditional mechanical synthesis technology, the invention improves the compounding efficiency of the silicon-carbon material and improves the problems of volume expansion of a silicon negative electrode, slow migration rate of lithium ions, poor cycle performance and the like.

The invention relates to a hole transport layer material for an inverted perovskite solar cell, the inverted perovskite solar cell and application, the hole transport layer material is a self-assembled monomolecular layer hole transport material, and the self-assembled monomolecular layer hole transport material comprises an organic compound with the following general formula: # imgabs0 #, r1 and R2 represent independently substituted C6-C15 aryl groups, and the substituent group is a methoxy group or a methylthio group; according to the inverted perovskite cell, holes of the hole transport layer can be reduced, the film forming quality can be improved, and the defects of the lower interface of the perovskite photosensitive layer can be passivated, so that the open-circuit voltage (Voc) and the fill factor (FF) of the inverted perovskite cell are effectively improved, and the photoelectric conversion efficiency of the perovskite cell is effectively improved; and the photoelectric conversion efficiency of the perovskite solar cell is optimal.

The invention discloses an electrode assembly and a preparation method thereof, a self-assembled solid-state battery and a preparation method thereof, and an electric device. The method for preparing the electrode assembly comprises the following steps: (1) preparing a composite solid electrolyte material: the composite solid electrolyte material comprises an inorganic material, a thermoplastic elastomer and a lithium salt, the inorganic material comprises an inorganic ceramic material and / or an inorganic solid electrolyte, and the composite solid electrolyte material is obtained by dry mixing; and (2) applying the composite solid electrolyte material between a pole piece and a release layer for hot pressing so as to obtain the electrode assembly. By adopting the method, the electrode assembly which is good in solid-solid interface contact, high in ionic conductivity, excellent in thermal stability, uniform and compact in solid electrolyte layer thickness, smooth in surface and free of pores can be prepared, and the interface problem in the solid-state battery assembling process is effectively solved; and meanwhile, a flexible solid-state battery interface can be constructed through one-step hot press molding, the interface impedance is reduced, and batch production of the electrode assembly is realized.

The invention discloses aramid nanofiber insulation paper with a self-assembled layered structure and a preparation method thereof.The preparation method comprises the steps that firstly, a modified basalt filler with ZIF-8 on the surface is prepared through a surface in-situ growth method, and then stably existing modified basalt fiber / aramid nanofiber dispersion liquid is obtained through an in-situ coating method; and finally, carrying out vacuum filtration to form the modified basalt / aramid nanofiber insulation paper with the self-assembled layered structure. The obtained insulation paper has low thermal conductivity, high breakdown strength, excellent mechanical properties and electrical insulating properties, can be used in the fields of electronic thermal management, buildings and the like, and has extremely high use value.

The invention discloses a hole transport layer, a preparation method thereof and a solar cell. The hole transport layer comprises an SAM (single self-assembled monomolecular layer) material and a buried material, and the buried material comprises F-type phosphate group-containing molecules. According to the invention, the technical problems of poor coverage of a hole transport material SAM on a transparent conductive oxide (TCO) substrate and weak transmission capability in a perovskite cell or a laminated cell in the prior art can be solved. The hole transport layer is more uniform, the interface transmission loss is smaller, and the filling factor and the conversion efficiency are remarkably improved when the hole transport layer is used for the solar cell.

The present invention relates to a photovoltaic crystalline silicon waste treatment technology, and in particular to a method for preparing a carbon-coated porous silicon-based lithium battery negative electrode material from photovoltaic crystalline silicon waste, comprising the following steps: 1) reducing the size of the photovoltaic crystalline silicon waste to a submicron level; 2) dissolving the treated photovoltaic crystalline silicon waste in a CH3CH2OH solution of NaOH, filtering, washing, drying, sintering and oxidizing the product, and finally etching it with a NaOH solution at room temperature to obtain porous silicon particles; 3) mixing the obtained porous silicon particles and CaCO3 in deionized water, ultrasonically dispersing to obtain a self-assembled porous silicon-CaCO3 particle precursor, centrifuging and washing to complete solid-liquid separation, and pyrolyzing the precursor with citric acid as a carbon source under an inert gas atmosphere to obtain the carbon-coated porous silicon-based lithium battery negative electrode material. The method of the present invention can not only effectively utilize the crystalline silicon waste generated in a silicon wafer cutting process, but also reduce the cost of preparing the silicon negative electrode material. At the same time, the design of the porous carbon coating structure also solves the problem of insufficient stability of the silicon-based lithium battery negative electrode material.

A self-assembled modified composite material, and a preparation method therefor and the use thereof. The self-assembled modified composite material comprises modified desulfurized gypsum which uses fly ash as a carrier and a lanthanum-based material which is self-assembled and adsorbed onto the fly ash. The composite material has a good phosphorus removal effect and a low cost, and the efficiency of phosphorus removal can reach 99.9%; moreover, the composite material has a fluorine removal effect, and the removal rate of fluorine ions can reach 98%. In the composite material, the desulfurized gypsum is combined with the fly ash, and therefore the adsorption performance of the fly ash is effectively incorporated. Moreover, the lanthanum-based material is self-assembled onto the modified desulfurized gypsum which uses the fly ash as a carrier, thereby forming a composite material having a uniform coordination structure. The composite material has a relatively large specific surface area, which further enhances the adsorption performance of the composite material and broadens the application range thereof. Therefore, the comprehensive resource utilization of industrial waste residues is achieved, and a new direction is provided for the resource utilization of solid waste.

The invention relates to a large-area methylamine-free perovskite photovoltaic module and a preparation method thereof. The photovoltaic module comprises a substrate, a hole transport layer, a perovskite active layer, an interface passivation layer, an electron transport layer and a metal electrode, the hole transport layer is a nickel oxide / organic hole material composite layer; the organic hole material comprises PTAA, P3HT, MoO3 or a self-assembled monomolecular layer. The perovskite solar cell provided by the invention has remarkable advantages in performance and stability, and especially has excellent long-term stability under high-humidity and high-temperature conditions.

The invention provides a composite hole transport layer, a preparation method and application thereof, a perovskite battery and a preparation method thereof, and belongs to the technical field of perovskite batteries. The composite hole transport layer comprises a first hole transport layer and a second hole transport layer. The first hole transport layer comprises nickel oxide; and the second hole transport layer comprises thiazole blue and carbazole self-assembled monomolecules. The nickel oxide, the thiazole blue and the carbazole self-assembled monomolecules are adopted, and the thiazole blue molecules and the carbazole self-assembled monomolecules generate a pi-pi effect, so that the arrangement uniformity of the SAM molecules can be improved, and a more compact and flat interface single layer is induced to be formed. Meanwhile, N atoms in thiazole blue molecules are combined with nickel oxide to reduce high-valence nickel, so that an interface trap between nickel oxide and perovskite is passivated, a bifunctional passivated molecular bridge facing a nickel oxide end and a perovskite end is formed, the bottom interface of the perovskite battery is remarkably adjusted, and the performance of a device is improved.

The invention relates to the technical field of solar cells, in particular to a perovskite solar cell based on a mixed self-assembly monomolecular layer and a preparation method of the perovskite solar cell. The perovskite solar cell based on the hybrid self-assembly monomolecular layer comprises a hybrid self-assembly monomolecular hole transport layer; the mixed self-assembly monomolecular hole transport layer contains polymerized SAM and monomolecular SAM; the mass ratio of the polymerized SAM to the monomolecular SAM is (1-10): 1. Two self-assembled monomolecular materials with different end groups are mixed to serve as the hole transport layer, and meanwhile, the photoelectric property and the mechanical property of the flexible f-PSCs are optimized; according to the flexible perovskite solar cell, agglomeration of a traditional SAM material is reduced, the coverage degree difference of the SAM material on the substrate is improved, meanwhile, the adhesive force between the perovskite layer and the flexible substrate is improved, and the photovoltaic performance and mechanical stability of the flexible perovskite solar cell are improved.

The invention discloses a tripterine-sophocarpidine self-assembled nanoparticle and application thereof in preparation of an anti-tumor drug, and belongs to the field of biological medicine. The nanoparticles are formed by self-assembly of the tripterine and the sophocarpidine through supramolecular interaction, the molar ratio of the tripterine to the sophocarpidine is 1: 1-1: 3, and the self-assembly system effectively solves the problems of low Cst solubility, poor bioavailability, rapid in-vivo removal and the like; the inhibition effect on triple negative breast cancer (TNBC) is remarkably enhanced through the synergistic effect of Cst and Mar, and a new strategy is provided for expanding the application of a traditional Chinese medicine carrier-free self-assembly nano drug delivery system in the anti-tumor field.

The invention relates to a solar cell and a preparation method thereof. The solar cell comprises a light absorption layer, a hole modification layer and a hole transmission layer which are arranged in a stacked mode. The hole modification layer is located between the light absorption layer and the hole transmission layer; the material of the hole modification layer comprises at least one of self-assembled monomolecular layer materials and at least one of polyoxometallate. According to the solar cell, the hole extraction capability of the hole transport layer can be improved, the hole mobility of an interface is improved, and the high photoelectric conversion efficiency of the solar cell is further achieved.

The invention discloses a method for in-situ lossless repair of an attenuated lithium manganate positive electrode material, which specifically comprises the following steps: adding the attenuated lithium manganate material into a lithium hydroxide solution, supplementing lithium to an original value by a hydrothermal method, repairing the component and structure defects of attenuated LiMn2O4 by combining high-temperature roasting, and recycling and regenerating lithium manganate particles with severely attenuated capacity. The lithium manganate positive electrode material is directly recovered by the lossless method, and the chemical components and crystallinity of the invalid positive electrode material in various health states are reconstructed, so that the invalid positive electrode material can be repeatedly used in the lithium ion battery. Finally, the treated recycled powder material is coated by a metal organic framework (MOFs) self-assembly method, so that the electrochemical performance of the treated powder material is further improved. The method is simple, environmentally friendly and low in energy consumption, has obvious advantages compared with a traditional hydrometallurgy battery recovery method, and lays an important foundation for sustainable manufacturing of energy materials.

The invention discloses a nitrogen-doped multilayer rose-shaped hard carbon material as well as a preparation method and application thereof, and belongs to the technical field of battery materials. A precursor of the nitrogen-doped multi-layer rose-shaped hard carbon material is prepared by adopting a solid-liquid self-assembly method, and then the precursor is calcined, so that the final nitrogen-doped multi-layer rose-shaped hard carbon material can be obtained. The prepared nitrogen-doped porous carbon material has more mesopores and defects, is unique in structure and uniform in shape, and can be used as a sodium ion battery negative electrode material. The nitrogen-doped multilayer rose-shaped hard carbon material prepared by the invention is a material with immunity to environmental influence, belongs to a mesoporous carbon material with stable chemical components and controllable shape in the porous field, has the advantages of regular structure, relatively good stability and the like, and has the properties of high capacity, good rate and the like as a negative electrode material.

The application belongs to the technical field of porous adsorption membrane materials, and discloses a titanium lithium ion porous adsorption membrane material and a self-assembly preparation method and application thereof. The preparation method comprises the following steps: dissolving a film-forming polymer in a dispersion liquid containing MXene nanosheets to form a uniform precursor liquid; the MXene nanosheet is a carbide, nitride or carbonitride of a transition metal with a single-layer structure; dispersing a titanium lithium composite oxide in the precursor liquid to form a casting solution; coating the casting solution on a support, and then performing phase inversion by using pure water to obtain a matrix film; placing the matrix film in a lithium elution liquid for immersion washing, replacing lithium ions in the matrix film, and causing a self-assembly reaction of the titanium lithium composite oxide in the matrix film, so that the titanium lithium ion porous adsorption membrane material is obtained. The application innovatively introduces MXene nanosheets and a polysulfone matrix film, fixes the MXene nanosheets on the polysulfone matrix film as an in-situ growth substrate of the titanium lithium composite oxide, and the obtained membrane material has a high adsorption capacity.

The invention discloses a self-assembly antibacterial polypeptide generation method based on a pepGPT model, a storage medium and equipment, and the method employs an MCTS model to carry out the following cycle processes: selecting a target node, expanding child nodes of the target node based on the pepGPT model, simulating and generating a random sequence, and evaluating and obtaining a reward value of the random sequence based on a discrimination model. Performing back propagation to update statistical information of each node on the search path; and ending until a preset time or a preset number of iterations is reached, and outputting the self-assembled antibacterial polypeptide meeting a preset reward value by the MCTS model. According to the method, intelligent prediction of the multifunctional polypeptide is realized, and the search and generation efficiency and classification accuracy of the self-assembled antibacterial polypeptide are improved.

The invention discloses a preparation method of a bacteriostatic bamboo fiber composite material, and relates to the technical field of bacteriostatic bamboo fiber composites.The preparation method comprises the following steps that firstly, bamboo fibers are subjected to biological enzyme degumming treatment and dried till the water content is smaller than or equal to 5%; 2, a periodic nanorod array is formed on the surface of the bamboo fiber through a laser-induced self-assembly technology, the laser wavelength is 266-1064 nm, the pulse frequency is 10-50 kHz, the height of nanorods is 50-200 nm, and the density is 10-30 nanorods per mu m < 2 >. Through laser wavelength and pulse frequency, the height and density of the nano-column are accurately regulated and controlled, the nano-column pierces a bacterial cell membrane, the overall bacteriostasis rate is improved, the stress dispersion and tensile strength of the nano-column are obviously improved, the nano-column structure is combined with fluorination modification, the hydrophobic contact angle is better, and bacterial breeding caused by liquid retention is reduced.

A method of making a razor blade by forming a cutting edge on a substrate having an outer bonding surface. A first self-assembled monolayer having a non-fluorinated organic material is deposited on the outer bonding surface of the substrate.

The invention relates to self-assembled microgel, a microgel assembled stent and a preparation method and a preparation device of the self-assembled microgel and the microgel assembled stent. The preparation method of the self-assembled microgel comprises the following steps: mixing a first solution and a second solution to obtain a pre-crosslinked product; mixing and emulsifying the pre-crosslinked product and a third solution to obtain a full-water-phase emulsified product; performing low-temperature condensation treatment on the all-water-phase emulsified product to obtain a low-temperature gel product; and further crosslinking the low-temperature gel product to obtain the self-assembled microgel. The invention provides the preparation method of the controllable reversible self-assembled microgel and the microgel assembled stent based on dynamic interaction of Schiff base and the like, the process is simple, the cost is relatively low, the equipment threshold requirement is low, the whole-process time consumption is relatively short, and the obtained product is high in cleanliness, high in safety, simple and convenient in form and easy to store and transport, and has a wide application prospect; and a new solution thought is provided for the fields of life science research and biomedicine.

The present invention discloses a low-detection-limit MEMS acetylene gas sensor and a preparation method thereof, which includes respectively preparing a SiO2-Si3N4 double-layer composite film on the front and back surfaces of a Si substrate; depositing an insulating layer on the front composite film, using self-assembled monolayer SiO2 microspheres as a template, cooperating with radio frequency sputtering of metal oxide SnO2, and preparing a SnO2 porous film by ultrasonically removing the SiO2 microspheres in acetone. On this basis, Au is evaporated by electron beam evaporation technology, and heat treatment is carried out to form agglomerated particles; a sensitive electrode and a lead pad, a heating electrode and a lead pad are obtained on the front surface of the silicon wafer, and a back groove is etched to obtain a sensor with an adiabatic groove. The Au nanoparticles modified SnO2 porous film has high consistency, fast sensor response speed and low power consumption, meeting the requirements of ultra-low detection limit and volume limitation in acetylene detection.

This invention in one aspect relates to a method of synthesizing a self-assembled mixed-dimensional heterostructure including 2D metallic borophene and 1D semiconducting armchair-oriented graphene nanoribbons (aGNRs). The method includes depositing boron on a substrate to grow borophene thereon at a substrate temperature in an ultrahigh vacuum (UHV) chamber; sequentially depositing 4,4″-dibromo-p-terphenyl on the borophene grown substrate at room temperature in the UHV chamber to form a composite structure; and controlling multi-step on-surface coupling reactions of the composite structure to self-assemble a borophene / graphene nanoribbon mixed-dimensional heterostructure. The borophene / aGNR lateral heterointerfaces are structurally and electronically abrupt, thus demonstrating atomically well-defined metal-semiconductor heterojunctions.