42 results about "Coffee ring effect" patented technology

The invention discloses a photoresist micro-lens array preparation method and system, and relates to the field of micro-nano optical device manufacturing. The preparation method of the photoresist micro-lens array comprises the following steps: carrying out chemical mechanical polishing treatment on a silicon wafer, spin-coating photoresist on a substrate to form a cylindrical array, and eliminating solvent gradient through pre-drying; forming a fluorocarbon nano film on the surface of the photoresist through plasma deposition so as to reduce the surface energy of the photoresist; realizing hot reflux of the photoresist based on gradient annealing, wherein the gradient annealing comprises a preheating section, a main reflux section and a stable section; on the basis of the preheating section, glass transition stress is avoided, fluorine-containing gas and inert gas are synchronously introduced into the main backflow section to act on a plasma sheath layer, so that the flowing direction of photoresist is regulated and controlled, and the edge coffee ring effect is inhibited; the stable section synchronously performs plasma assistance to lock the shape; and the precision and the consistency of the micro-lens array are improved through segmented temperature regulation and control and a plasma auxiliary technology.

The invention provides an enzyme protective agent for a continuous glucose sensor and the continuous glucose sensor, the enzyme protective agent comprises the following components: poloxamer and a zwitterionic polymer, and the mass percent concentration of the poloxamer is 0.1%-2%, and the mass percent concentration of the zwitterionic polymer is 0.5%-5%. By adopting the technical scheme provided by the invention, the poloxamer and the zwitterionic polymer are introduced, so that an enzyme layer coating process can be optimized, a coffee ring effect can be inhibited, and the consistency and monitoring accuracy of the sensor can be improved; and on the premise of keeping the signal transmission performance of the sensor unchanged, the activity and long-term stability of the biological enzyme preparation in the production, storage, transportation and use processes are remarkably improved.

According to the enhanced Raman detection platform, the preparation method and the detection method provided by the invention, the enhanced Raman detection platform comprises an SERS substrate, a patterned micro-nano structure with a hydrophilic region is formed on the surface of the SERS substrate through a femtosecond laser etching technology, and a to-be-detected analyte molecular solution can form nearly spherical liquid drops in the patterned micro-nano structure region and is enriched in the hydrophilic region; the hydrophilic area is covered with the microsphere array film; according to the method, the patterned micro-nano structure substrate with the surface super-hydrophobic / hydrophilic function is designed and prepared by applying a femtosecond laser etching technology, so that the'coffee ring effect 'that analyte molecules are dispersed towards the edge in a sample dripping or soaking sample preparation process is effectively solved; the purposes of reducing the sample gathering area and enriching analytes are achieved; mesoscale dielectric microspheres with sub-diffraction limit scale light field focusing capability are introduced and coupled with hot spots on an SERS substrate, so that SERS signals are further enhanced, and ultra-sensitive detection of ultra-trace substance molecules is realized.

The invention discloses an efficient and uniform perovskite passivation layer processing method and a solar cell, in particular to a perovskite passivation layer processing method combining physical vapor deposition, solvent-assisted induction and an air knife drying technology, and the method combines the physical vapor deposition, the solvent-assisted induction and the air knife drying technology. The problems that in an existing perovskite passivation layer preparation method, control over the thickness of a passivation layer is not accurate, a passivation solvent possibly causes damage to a perovskite interface, and the passivation layer is not uniform due to the coffee ring effect in large-area preparation are solved.

The application provides a preparation method of a perovskite quantum dot ink, comprising the following steps: blending decahydronaphthalene, n-octane and white oil to obtain a ternary mixed solvent through stirring; and adding a solute into the ternary mixed solvent to obtain a mixed solution, wherein the solute is perovskite quantum dots and organic ligands arranged on surfaces of the perovskite quantum dots, so that the solute is uniformly dispersed in the ternary mixed solvent to obtain the perovskite quantum dot ink. The application forms a self-outer-to-inner Marangoni flow through a three-solvent system, and balances a self-inner-to-outer capillary flow of a coffee ring effect, so that the coffee ring is eliminated.

The application provides a kind of hole transport layer, a kind of perovskite solar cell and preparation method, the hole transport layer is polytriarylamine film, the polytriarylamine film is dissolved in carbon tetrachloride and toluene asymmetric binary solvent system by polytriarylamine, is prepared by coating, thermal annealing;In the asymmetric binary solvent system, the volume ratio of carbon tetrachloride and toluene is 100:1 to 1:100.By using carbon tetrachloride and toluene asymmetric binary solvent system to prepare polytriarylamine hole transport layer, effectively inhibit coffee ring effect, improve film flatness and density, reduce interface defects, significantly improve the photoelectric conversion efficiency and long-term thermal and humid stability of perovskite solar cell and assembly.

The application relates to the technical field of electronic information materials, in particular to a high-stability coffee ring resistant nano-silver jet printing ink, a preparation method and application. According to weight percentage, the preparation raw material of the nano-silver jet printing ink comprises 20-30% of nano-silver particles and the balance of mixed solvents; the nano-silver particles are zero-dimensional spherical particles coated with a stabilizer; and the mixed solvents comprise a first solvent, a second solvent, a third solvent and a fourth solvent with different boiling points. The application is innovative, and the specific four-component solvent compound system, the step-by-step filtration process and the rapid infrared sintering process are synergistically combined, so that the coffee ring effect is fundamentally inhibited while the excellent printing stability is ensured, and the high-performance ink with high uniformity and high-precision conductive patterns is obtained.

The invention belongs to the technical field of nano material preparation and printing, and particularly relates to indium phosphide quantum dot ink as well as a preparation method and application thereof. According to the preparation method disclosed by the invention, the indium phosphide quantum dot core is firstly synthesized, and then the acrylic acid / polyacrylic acid / acrylate derivative ligand is used for carrying out surface treatment on the indium phosphide quantum dot, so that the surface passivation and stability improvement of the indium phosphide quantum dot and the optimization of the rheological property of the ink are synchronously realized, and the quantum efficiency is improved; the photoluminescence quantum yield is increased by 80% to 100% compared with that of similar InP / ZnSe quantum dots which are not treated by acrylic acid and the like. Indium phosphide / zinc selenide quantum dots treated by acrylic acid and the like are dispersed in an organic solvent to adjust the adaptive concentration to obtain the quantum dot ink, the ink does not need to be added with an additional rheology modifier or a film-forming polymer, the coffee ring effect can be effectively inhibited during drying, and preparation of high-resolution micro-patterns is achieved. The material can be directly used as a color conversion layer to be integrated with a blue micron light-emitting diode chip to form a display device.

The invention provides a nano metal conductive network / polymer substrate flexible transparent electrode based on coordination bonding and a preparation method thereof, and relates to the field of flexible electronic materials.The method comprises the steps that S1, the surface of a hydrophobic substrate is coated with metal nanowire dispersion liquid, and a micron-sized conductive network is formed through self-assembly by means of the coffee ring effect; s2, preparing a substrate solution for forming a coordination bonding effect with a metal material; and S3, embedding the micron-sized conductive network in the step S1 into the substrate solution prepared in the step S2, and drying and stripping to form the embedded electrode. The method is simple in process and suitable for large-area preparation, and the obtained electrode has the advantages of being high in visible light transmittance, low in sheet resistance, excellent in mechanical stability, rapid in thermal response and the like. The flexible transparent electrode can replace traditional FTO, ITO and other brittle conductive substrates, and has wide application prospects in the fields of flexible solar cells, light-emitting displays, wearable optoelectronic devices and the like.

The invention discloses a method for uniformly forming a film by using magnetic self-driven particles to assist functional material ink and application. The method comprises the following steps: depositing the functional material ink doped with the magnetic self-driven particles on a substrate under the condition that a magnetic field is externally applied, and then drying the functional material ink; the magnetic self-driven particles are prepared from the following raw materials: a magnetic material coated with a hydrophilic polymer and a functional material, wherein the functional material comprises at least one of a conductive polymer and a functional photovoltaic material; the magnetic field comprises at least one of a low-frequency alternating magnetic field of 1-10 Hz and a high-frequency magnetic field of 50-100 Hz. By doping the magnetic self-driven particles in the functional material ink and regulating and controlling the external magnetic field, the coffee ring effect is effectively inhibited, and uniform drying and film forming of the functional material suspension are realized.

The invention discloses a method for preparing a micro-nano quantum dot light-emitting diode based on an electrically programmable surface energy lamination. According to the method, photoetching and developing are avoided, residues are not introduced, erosion to an organic layer is avoided, and the process environment compatibility is good. The inside of the pixel is oleophylic, the outside of the pixel is oleophobic, then an alternating non-uniform electric field is applied to generate field induced dielectric enrichment (FiDEF), quantum dots at the boundary are enriched towards the inner side of the pixel to sharpen the boundary, the coffee ring effect is avoided, and dark current and optical crosstalk are remarkably reduced through cooperation of long-term lyophobic outside the pixel, edge densification and outer ring passivation.

The present application relates to a kind of coffee ring effect auxiliary graphene microdrop printing high-efficiency preparation terahertz micro-ring array method, first by ultrasonic dispersion process preparation stable dispersion and significant coffee ring effect graphene ink;Then using piezoelectric nozzle jet and deposit single graphene microdrop, by controlling substrate material and temperature parameter to enhance microdrop coffee ring effect, make solute gather in microdrop edge in large quantities, form high-resolution micro-ring structure unit;Repeat the above deposition process, print periodic graphene microdrop dot matrix, obtain micro-ring array after completely drying;Finally, graphene terahertz micro-ring array is prepared after heat treatment.Due to the smaller graphene sheet size can accelerate edge solute pinning, and promote solute to be tightly packed in microdrop edge, therefore, the ultrasonic process parameter combination in step 1 and its small sheet size graphene ink produced, can enhance microdrop coffee ring effect, be conducive to the formation of graphene micro-ring of the present application.

The invention discloses a wearable SERS (Surface Enhanced Raman Scattering) sensor with an asymmetric Janus structure as well as a preparation method and application of the wearable SERS sensor. According to the sensor, an asymmetric double-layer structure is constructed through ultraviolet polymerization and a spin-coating technology, an adhesion layer (AA / HACC hydrogel) has humidity responsiveness and high adhesion, and a detection layer (CCNF / Au NCs) inhibits a coffee ring effect and ensures uniform distribution of nanoparticles. The detection limit of the hydrogel is as low as 0.027 [mu] M (L-phenylalanine), the RSD is less than or equal to 7.63%, the cell survival rate is greater than 95%, and these results jointly prove the excellent performance of the hydrogel in the aspects of sensitivity and stability. In addition, due to the characteristic of rapid preparation through photopolymerization, large-scale production can be realized. Therefore, the asymmetric Janus-SERS hydrogel sensor is suitable for early screening of glaucoma, dynamic monitoring of tear metabolites and personalized diagnosis and treatment of chronic diseases, has high sensitivity, biocompatibility and antibacterial performance, and has clinical transformation potential.

The application provides a method for determining the content of silicate in salt lake brine. + The method comprises the following steps: removing boric acid, boric acid salt and metal cations except Na from the salt lake brine to be measured by an adsorption resin and an imprinted hydrogel in sequence; obtaining a linear regression equation according to the mass concentration of silicate in a reference solution and the peak area of the Raman spectrum of the reference solution; and finally, scanning the coffee ring of the solution to be measured by using a Raman spectrometer, obtaining the peak area, and substituting the peak area into the linear regression equation to obtain the content of silicate in the salt lake brine to be measured. The boric acid, boric acid salt and metal cations in the salt lake brine to be measured are removed first, which can reduce the interference of salinity and other substances on the detection result, simplify the preparation process of the salinity matrix, reduce the amount of reagent used, fully combine the separation and enrichment characteristics of the coffee ring effect and the high-resolution detection of the Raman spectrum, and quickly and accurately determine the content range of silicate in the salt lake brine.

The invention belongs to the related technical field of laser-induced plasma emission spectroscopy, and discloses a method for inhibiting coffee ring effect and correcting LIBS (laser-induced breakdown spectroscopy) matrix effect, which comprises the following steps: respectively introducing a first element and a second element which have similar characteristics with precipitated and non-precipitated elements in to-be-detected chlorate, and respectively preparing into a solution A and a solution B; mixing and oscillating to form a uniform suspension, and heating and drying the uniform suspension to obtain a sample; ablating the sample based on an LIBS technology, collecting original spectral data, and obtaining a distribution area of each element to be detected; dividing the distribution area into a settling area and a non-settling area, respectively selecting a first element and a second element as internal standard elements for the two areas, selecting an internal standard spectral line according to spectral line information of the internal standard elements, and finally performing quantitative analysis by using an internal standard method. According to the method, the coffee ring effect and the matrix effect can be effectively inhibited while the advantages of high efficiency and convenience of LIBS are reserved, so that the stability and quantitative performance of an LIBS detection spectrum are improved.

The invention provides an SEM sample preparation method for micro-nano sample morphology characterization. According to the SEM sample preparation method, the adopted solvent is at least one of acetone, ethanol and methanol, and the solvents are liquid with low tension, low boiling point, high vapor pressure and low viscosity; the included angle between the conductive substrate and the horizontal plane is 15-45 degrees; the rapid evaporation effect is achieved by using specific solvents such as acetone, ethanol and methanol, and the micro-nano sample can be uniformly distributed on the conductive substrate in a manner of dropwise adding the dispersion liquid to the surface of the conductive substrate which is obliquely placed at an included angle of 15-45 degrees, so that the coffee ring effect is avoided, and the uniformity and integrity of the surface structure of the micro-nano sample are ensured. The method reduces the particle aggregation of the micro-nano sample, improves the surface quality of the micro-nano sample, is suitable for high-resolution morphology observation, can present a clearer and finer micro-nano structure especially in SEM, AFM and other characterization, and is beneficial to accurate analysis of the structural characteristics of the micro-nano sample.

The invention relates to a preparation method of an interface modification layer based on a coffee ring effect, the interface modification layer based on the coffee ring effect prepared by the preparation method and a solid-state battery, and the preparation method comprises the following steps: spraying a metal salt precursor solution on the surface of a high-temperature solid-state electrolyte; a plurality of annular structures are formed on the surface of the solid electrolyte, and the interface modification layer is prepared. According to the preparation method provided by the invention, the coffee ring effect is utilized, the metal salt precursor solution is rapidly evaporated and decomposed on the surface of the solid electrolyte, and a plurality of ring structures are formed on the surface of the solid electrolyte to prepare the interface cross-linking layer, so that the interface contact between the solid electrolyte and the lithium metal negative electrode is remarkably improved; the interface impedance is obviously reduced; moreover, compared with the existing methods such as magnetron sputtering, thermal evaporation, chemical vapor deposition and construction of a composite negative electrode, the method has the advantages of simplicity in operation, low cost, no sacrifice of the specific capacity of the negative electrode and good cycle performance of the battery.

The application discloses a film layer printing method and device, electronic equipment and storage medium. The application can divide the to-be-printed unit in the substrate into multiple sub-regions, and control the printing nozzle of the printing device to print the material in the sub-region, so as to form a film layer. In the application, the to-be-printed unit in the substrate is divided into multiple sub-regions according to the size information of the to-be-printed unit, and then the printing nozzle is controlled to print the sub-region, so that the flowing time of the material in the to-be-printed unit is reduced, the distribution of the material in the to-be-printed unit is more uniform, the generation of the coffee ring effect is avoided, and the thickness of the film layer is effectively ensured to be more consistent. Therefore, the stability of the device can be improved.

The invention belongs to the field of particle suspension evaporation, and relates to a particle suspension evaporation method and system based on a vibration substrate. According to the method, particle suspension liquid drops are deposited on a vibration substrate, and the substrate is driven to generate periodic vibration with specific frequency and amplitude, so that the liquid drops enter a resonance state. Under the resonance condition, complex convection is formed in the liquid drops, single circulation driven by evaporation is broken, the trend that particles continuously migrate to the edge is remarkably weakened, and therefore the coffee ring effect is effectively restrained. Compared with the prior art, the method has the advantages that the structure is simple, the operation is convenient, uniform deposition of particles can be realized without adding a surfactant or special surface modification, and the method has good universality and wide application prospect, and is suitable for the fields of biological detection, ink-jet printing, functional coating, micro-nano device manufacturing and the like.

The invention discloses an SERS (Surface Enhanced Raman Scattering) detection method for constructing a hot-spot ordered multilayer nano array based on temperature-driven shrinkage liquid drops, which comprises the following steps of: changing the surface tension of a gas-liquid interface by utilizing temperature change to generate a thermal capillary effect or a Malangori effect, and regulating and controlling the dynamic shrinkage process of the nano sol liquid drops; the target molecules are actively transported into the uniformly distributed hot spot ordered multi-layer nano array structure, coffee rings caused by the reduction of the uniformity of the nano array are avoided, and then a target object signal is detected under a Raman spectrometer. Circulating convection is generated through the synergistic effect of the Malangori effect and the coffee ring effect, and the nano particles in the contracted liquid drops can circularly flow in the centers and the edges of the liquid drops. Therefore, an ordered multi-layer nano array with uniformly distributed hot spots can be constructed in a liquid drop shrinkage process, and meanwhile, high-sensitivity and high-stability detection of SERS of target molecules in the hot spots can be realized.

The invention provides a preparation method and application of a self-assembled silver nanowire array for read-only memory, belongs to the field of metal nano material preparation, and solves the problems that the arrangement and the structure of silver nanowires are difficult to accurately control by a traditional self-assembled silver nanowire deposition method, the overall performance of a device is influenced, and the device performance is influenced. The preparation method comprises the following steps: carrying out ultrasonic treatment on a prepared silver nanowire solution, sucking a proper amount of the solution by using a pipette, putting the solution into preparation equipment consisting of a substrate and a baffle plate to generate a multi-ring mode coffee ring effect, and carrying out ultrasonic treatment on the prepared silver nanowire solution; in addition, data storage is realized innovatively through welding among the silver nanowires, and the silver nanowires can be welded only by applying voltage, so that resistance is reduced, data storage is realized, special materials and structures are not needed, and due to the high resistance of the silver nanowire array, the data storage performance is greatly improved. And the power consumption required for writing and reading the data is low.

This invention discloses a multifunctional atomizing agent for ancient book restoration, its preparation method, and its application, belonging to the field of ancient book preservation technology. The atomizing agent is a mixed solution containing chitosan quaternary ammonium salt and zirconium carbonate. The method for treating ancient books using this atomizing agent is as follows: after cleaning the ancient books to remove impurities, they are placed in a sealed deacidification device. The mixed solution of chitosan quaternary ammonium salt and zirconium carbonate is atomized and then introduced to spray the pages of the ancient books. The books are then dried in a ventilated environment at ambient temperature to complete the treatment. The atomizing agent and treatment method of this invention have multifunctional effects on ancient books, including deacidification, strengthening, consolidation, antibacterial properties, and anti-aging. It avoids the uneven treatment caused by the coffee ring effect and phenomena such as yellowing and fading. Furthermore, it simplifies the ancient book restoration process, enabling one-step atomization, significantly shortening the processing flow, reducing processing operations, shortening the processing cycle, and significantly improving processing efficiency.

The present application relates to the technical field of coating, in particular to a method for inhibiting coffee ring effect. The present application is based on the synergistic effect of gravity affecting the distribution of solid particles in a liquid containing particles, solvent surface tension and evaporation rate to inhibit coffee ring effect. The present application adopts a specific drying method of inverting the wet coating layer downward. Under the influence of gravity, the liquid droplets form an inverted cone, and the solid particles are affected by gravity and concentrated at the bottom of the cone. The solid particles flowing to the edge flow downward after reaching the edge, and the cycle continues, so that the solid particles gradually dry and fix to the substrate surface. By controlling the volume fraction of volatile organic solvent in the solvent and the drying temperature, the control of the solvent surface tension and the evaporation rate is realized, and the coffee ring effect is effectively inhibited, and a uniform coating is obtained. The method provided by the present application is simple and effective, and is suitable for different substrate surfaces, solvents and solid particles, and has wide application range and wide application scenarios.

The utility model provides a display panel and a display device. The display panel comprises a substrate, a first light-emitting unit, a second light-emitting unit and a third light-emitting unit, the first light-emitting unit, the second light-emitting unit and the third light-emitting unit are arranged on the substrate, the light-emitting wavelength of the first light-emitting unit is larger than that of the second light-emitting unit, and the light-emitting wavelength of the second light-emitting unit is larger than that of the third light-emitting unit. Each light-emitting unit comprises an anode, a functional part and a light-emitting part; by reducing the ink printing amount of the light-emitting part in the second light-emitting unit, the average thickness of the light-emitting part in the second light-emitting unit is larger than 65 nm and smaller than 80 nm, the coffee-ring effect of the second light-emitting unit is relieved, the flatness of the surface of the side, away from the substrate, of the light-emitting part is improved, the uniformity of a film layer is improved, and the light-emitting efficiency is improved. And the performance and the service life of the display device are improved.

The invention discloses a perovskite precursor solution for preparing a flexible photovoltaic module and application thereof, and belongs to the technical field of solar cells. The technical problems to be solved are that a perovskite precursor prepared from a perovskite precursor solution cannot be arranged in order, so that a grain boundary has defects, and a prepared perovskite film cannot be industrially produced in air and is poor in stability. The key point of the technical scheme is that a perovskite precursor solution prepared by adopting a specific solvent combination and proportion and a perovskite material is moderate in volatilization rate, uniform film formation is facilitated, and the coffee ring effect or pinhole defect caused by rapid drying is avoided. The controllable crystallization rate provides enough time to enable the perovskite precursor to be arranged in order, and the grain boundary defect is reduced, so that the performance of the subsequently prepared flexible photovoltaic module is improved.

The invention discloses a Raman spectrum myocardial infarction screening method, a Raman spectrum myocardial infarction screening system, Raman spectrum myocardial infarction screening equipment and a medium, and belongs to the field of biomedical spectrum detection. The method comprises the following steps: collecting a trace peripheral whole blood sample, mixing with an SERS (Surface Enhanced Raman Scattering) reagent, dispensing, depositing and drying, and preparing a to-be-detected sample by utilizing a coffee ring effect; collecting the Raman spectrum to obtain original data; self-adaptive dual-channel interference elimination processing is carried out on original data to obtain a pure biomarker spectrum, and the processing fuses physical correction based on a standard spectrum library and data driving correction based on an adversarial auto-encoder; microcosmic, mesoscopic and macroscopic biomarker features are extracted from the pure spectrum and aggregated to generate a multi-dimensional feature vector; and finally, inputting the feature vector into a lightweight deep learning model to obtain a risk probability and finish grading evaluation. According to the method, rapid and high-precision myocardial infarction screening of trace whole blood without centrifugation is realized, and the accuracy and practicability of instant detection are remarkably improved.

An embodiment of the present application provides a display panel. The display panel generates an electric field on the pixel electrode. In the display panel provided by the present application, since opposite poles that generate the electric field are specially designed, a distance between the opposite poles that generate the electric field is constant everywhere, thereby improving uniformity of the electric field. Such electric field assisted deposition of a light-emitting functional layer material and drying of the light-emitting functional layer can suppress a coffee ring effect.

The invention discloses a preparation method of a perovskite solar cell scraped by a multi-component solvent. The preparation method comprises the following steps: S1, scrape-coating a hole transport layer on a conductive substrate; s2, sequentially blade-coating a perovskite active layer and an electron transport layer on the hole transport layer; s3, sequentially arranging a cathode modification layer and an electrode layer on the electron transport layer; and a solvent for forming the electron transport layer is selected from at least two of orthodichlorobenzene, chlorobenzene and chloroform. According to the invention, the PCBM electron transport layer is prepared by using the composite solvent, so that the problem of coffee ring effect caused by rapid volatilization of a single solvent is solved, the film forming uniformity of PCBM is improved, and the power conversion efficiency of the perovskite solar cell is improved; and meanwhile, the PCBM electron transport layer is prepared by adopting a blade coating process, so that the problem of PCBM agglomeration is solved, and the power conversion efficiency of the perovskite solar cell is effectively improved.

The invention provides a nano-diamond seed crystal planting method and application of the nano-diamond seed crystal planting method in CVD diamond growth. The nano-diamond seed crystal planting method comprises the following steps that S1, surface-modified nano-diamond is dispersed in a low-boiling-point organic solvent to form dispersion liquid; s2, dropwise adding the dispersion liquid to the surface of low-temperature deionized water, and diffusing the organic solvent to form a monomolecular layer film; s3, the substrate is immersed in deionized water for pulling, and the monomolecular layer thin film is completely attached to the substrate; and S4, drying the monomolecular layer film. According to the invention, the huge interfacial tension difference between an organic solvent and a high-surface-tension water phase is utilized, the nano-diamond is compressed in the solvent volatilization process to form a compact single-layer film, the van der Waals force agglomeration limitation is broken through, and liquid-liquid interfacial tension driven self-assembly is realized; by modifying the surface of the nano-diamond, the dispersity and interface behavior of the nano-diamond in an organic solvent are regulated and controlled, and the coffee ring effect and agglomeration problems are solved; solvent diffusion is controlled through a low-temperature water phase, organic solvent diffusion is accelerated, a monomolecular layer thin film is formed, nanoscale precision arrangement is achieved, and high-crystal-quality diamond can be conveniently prepared.

The present invention is for achieving the technical objective of providing a quantum dot composition for providing: a quantum dot film having a uniform film thickness and low thickness variation; and a quantum dot film in which the coffee ring effect is reduced. Provided, in order to achieve said technical objective, are a quantum dot composition, a quantum dot film, and a display device, the quantum dot composition comprising: quantum dots; carboxylic acid having a melting point of 25°C or lower, and having a branched aliphatic hydrocarbon group; and a solvent.