36results about How to "Avoid the Coffee Ring Effect" patented technology

The invention discloses an electroluminescent display panel, a preparation method thereof and a display device. The preparation method comprises the steps of forming an anode in each sub-pixel of a substrate and a pixel defining layer between the sub-pixels; spraying ink and an anti-solvent on the anode of each sub-pixel by adopting an ink-jet printing process; performing ultrasonic treatment anddrying treatment on the substrate sprayed with the ink and anti-solvent to form an organic electroluminescent layer; and forming a cathode on the organic electroluminescent layer so as to form an electroluminescent display panel. The anode of each sub-pixel is sprayed with the ink and anti-solvent by adopting the ink-jet printing process, and a solute is separated out according to principles thatthe anti-solvent is mutually dissolved with a solvent and that the solute is not dissolved or slightly dissolved in the anti-solvent. The solute is enabled to be uniformly dispersed through the ultrasonic treatment, and then the solvent and the anti-solvent are removed through the drying treatment, so that the uniformity of the film thickness of the prepared organic electroluminescent layer is enabled to be improved, and a coffee-ring effect of the organic electroluminescent layer is avoided.

The invention discloses a preparation method of a graphene material resistance type gas sensing array and an application method thereof. The preparation method comprises the following steps: adding ametal salt solution into a graphene oxide solution, adjusting a pH value of the mixed solution, carrying out ultrasonic dispersion, incubating the mixed solution on an oscillator for 4 to 12h, carrying out washing with deionized water and carrying out dispersion with deionized water to obtain a metal ion-induced graphene oxide self-assembled suspension, and changing configuration conditions to prepare a plurality of parts of metal ion-induced graphene oxide self-assembled suspensions; adding the plurality of parts of metal ion-induced graphene oxide self-assembled suspensions to interdigitalsof a multi-site fork-shaped electrode array respectively, carrying out natural drying, placing a product in reducing steam at a temperature of 60 to 120 DEG C for 3 to 30 minutes. With the disclosed preparation method, the uniform loading of the graphene material on the substrate is realized and the provided resistance type gas sensing array has the recognition capability on single gas and complexgas. The preparation method can be used for preliminary diagnosis of diseases, personal health monitoring and food and public safety monitoring.

The invention discloses a hole injection layer ink for inkjet printing and its application in organic light-emitting display. The ink is prepared by mixing a PEDOT aqueous solution and isopropyl alcohol. The ink is ink-jet-printed into a PEDOT film by an inkjet printer in a region where an organic light-emitting display pixel is formed on a substrate subjected to oxygen plasma treatment or carbontetrafluoride plasma treatment. The composition and preparation method of the PEDOT ink of the invention are simple, the auxiliary solvent has stable performance, low content and strong volatility, and is easy to dry and remove after being printed into a film. Surface roughness and electrical property change of the PEDOT film will not be caused by excessive drying time. The PEDOT film has high uniformity, no obvious thin intermediate and thick edges, and avoids the coffee-ring effect. Moreover, the matching ability between the height of an etched separation pillar and multiple functional layers is improved. The hole injection layer ink has a good application prospect.

The invention provides a method for measuring the coverage rate of a quantum dot surface ligand. The coverage rate Ki of the organic ligand containing sulfydryl on the quantum dot surface is determined by an oxidation-reduction method. The method can be used for quality evaluation of the quantum dot. If the Ki is less than 2*10<-10> mol / cm<2>, the quality of the quantum dot is poor; and solution or ink configuration can not be carried out until the Ki value is improved. With the provided method, the result is accurate; and the operation is simple. Furthermore, with the method, the high stability of the quantum dot surface ligand content is ensured; the solubility of different batches of quantum dots is guaranteed; a coffee ring effect caused by different drying rates in quantum dot solution preparation for a film is avoided; add the pixel resolution and uniformity of the brightening voltage and the photoelectric efficiency of the quantum dot display panel can be improved.

A recoatable and antireflection superhydrophobic coating and its preparation method and application belong to the field of material surface treatment. The preparation method is as follows: mix ethanol and chain-type nano-silica sol to obtain solution A; mix ethanol and tetraethyl orthosilicate, add ammonia and stir, then age, then add tetraethyl orthosilicate and stir to obtain a solution B: Mix solution A and solution B and stir to obtain solution C; add modifier and surfactant to solution C and stir to obtain super-hydrophobic coating, and use activated molecular sieve to remove water. The preparation process of the invention is simple, and the preparation process is environmentally friendly and pollution-free. The prepared coating can be dip-coated many times. The coating has good film-forming properties, high light transmittance, fast drying, and good super-hydrophobic effect. It can be used for automotive rearview mirrors, automotive windshields, electronic product glass, architectural glass, solar energy Battery glass, clothing, shoes and other occasions make the coated substrate have multiple functions such as waterproof, anti-fog, anti-fouling, self-cleaning and so on.

The invention provides a method for measuring the coverage rate of a quantum dot surface ligand. The coverage rate Ki of the organic ligand containing sulfydryl or nitrogen on the quantum dot surfaceis determined by potentiometric titration. The method can be used for quality evaluation of the quantum dot. If the Ki is less than 2*10<-10> mol / cm<2>, the quality of the quantum dot is poor; and solution or ink configuration can not be carried out until the Ki value is improved. With the provided method, the result is accurate; and the operation is simple. Furthermore, with the method, the highstability of the quantum dot surface ligand content is ensured; the solubility of different batches of quantum dots is guaranteed; a coffee ring effect caused by different drying rates in quantum dotsolution preparation for a film is avoided; add the pixel resolution and uniformity of the brightening voltage and the photoelectric efficiency of the quantum dot display panel can be improved.

The invention provides a super-hydrophobic automatic positioning SERS a preparation method and application thereof, and relates to the technical field of Raman spectrum detection. The invention provides a preparation method of a super-hydrophobic automatic positioning SERS spectrum detection platform. The preparation method comprises the following steps: forming an arc-shaped groove in the surface of a substrate; etching after removing the oxide layer on the surface of the arc-shaped groove to form a micro-nano structure surface; and evaporating fluorosilane on the surface of the micro-nano structure to obtain the super-hydrophobic automatic positioning SERS spectrum detection platform. The super-hydrophobic automatic positioning SERS spectrum detection platform provided by the invention is simple and convenient in preparation process, low in cost and convenient for actual use; the detection platform provided by the invention is combined with the surface enhanced Raman spectroscopy to detect the trace analyte, so that the coffee ring effect can be effectively avoided, the detection sensitivity is relatively high, and the stability and uniformity are relatively good.

The invention discloses an electroluminescent display panel, its preparation method and a display device. By forming each anode in each sub-pixel of a base substrate and forming a pixel-defining layer between each sub-pixel, an inkjet printing process is used to print The anode of each sub-pixel is sprayed with ink and anti-solvent, and the base substrate sprayed with ink and anti-solvent is ultrasonically treated and dried to form an organic electroluminescent layer, and a cathode is formed on the organic electroluminescent layer to form an electroluminescent layer. Luminescent display panel. Since the inkjet printing process is used to spray ink and anti-solvent on the anode of each sub-pixel, the solute is precipitated by the principle that the anti-solvent and the solvent are mutually soluble and the solute is insoluble or slightly soluble in the anti-solvent. The solute is uniformly dispersed by ultrasonic treatment, and the solvent and anti-solvent are removed by drying treatment, so that the uniformity of the film thickness of the prepared organic electroluminescent layer is improved, and the coffee ring effect of the organic electroluminescent layer is avoided.

The invention relates to the technical field of gas sensors, and discloses an embedded three-dimensional structure micro heating plate which comprises a silicon-based substrate and an electrode layer. A cavity is formed in the surface layer of the silicon-based substrate; the electrode layer comprises a heating electrode and a measuring electrode, and the heating electrode and the measuring electrode are embedded in the cavity. According to the micro heating plate, the embedded electrode layer is adopted, the electrode layer is supported through the cavity structure, and the mechanical stability is good. As the heating electrode is embedded in the cavity, the heating space is optimized into an embedded cavity structure from a plane structure which is completely exposed in the environment, the influence of environmental airflow on the central heating area is small, heat convection is carried out in the cavity, and heat radiation on the inner wall of the cavity is constant and uniform, so that the heat loss is slow, the heat loss is low, and the power consumption of the micro heating plate can be reduced. According to the micro heating plate, the good mechanical stability is ensured under the condition that the power consumption is reduced.

The invention relates to an ink, a preparation method thereof and a gas sensor film. Wherein, the preparation method of described ink comprises the following steps: providing anisotropic α-Fe 2 o 3 Nanoparticles; in the α-Fe 2 o 3 The surface of nanoparticles forms SnO with mesoporous structure 2 shell, resulting in α-Fe with a core-shell structure 2 o 3 / SnO 2 Nanocomposite particles; the α-Fe with core-shell structure 2 o 3 / SnO 2 The nanocomposite particles are dispersed in water to obtain a dispersion liquid, and then a solvent is added and mixed uniformly to obtain the ink. The ink prepared by the method is uniform and stable, and is suitable for inkjet printing. The ink combines two gas-sensitive materials into one body, can suppress the coffee ring effect, and improves the uniformity and sensitivity of the gas-sensitive sensor film.

The invention proposes a method for measuring the coverage ratio of ligands on the surface of quantum dots. Determination of the coverage rate K of ligands of organic ligands containing sulfhydryl groups or nitrogen on the surface of quantum dots by potentiometric titration i , which can be used to evaluate the quality of quantum dots. If K i less than 2*10 ‑10 mol / cm 2 , the quality of quantum dots is not good, and K i Increase the value before proceeding with applications such as solution or ink dispensing. Adopt this method to determine quantum dot surface ligand coverage rate, result is accurate, easy to operate, further, can guarantee the stability of quantum dot surface ligand content by the method of the present invention, can guarantee the solubility of different batches of quantum dots, avoid The coffee ring effect caused by the different drying rates when the quantum dot solution is prepared into a film can improve the uniformity of the pixel resolution, turn-on voltage, and photoelectric efficiency of the quantum dot display panel.

Embodiments of the present invention provide a display substrate, a method for fabricating the same, and a display device. The display substrate includes a base substrate on which a pixel defining layer is provided, and a space for accommodating the pixel defining layer is formed between the pixel defining layers. In the pixel area of ​​the pixel ink, a light-to-heat conversion layer for converting light energy into heat energy is arranged on the pixel defining layer to ensure that the pixel ink has a uniform thickness after film formation and avoids coffee ring effect.

The invention relates to a making method of an activity detection two-dimensional code, and belongs to the field of biochemical detection. The purpose of the invention is to provide the making method of the activity detection two-dimensional code, having the advantages of simplicity, information loading and accurate and effective detection result. The method comprises the following steps: editing content information, and using a computer two-dimensional code generator to make a two-dimensional code; preparing functional ink; using the prepared functional ink and a solution to be detected to generate a two-dimensional code on a detection substrate; and scanning the displayed two-dimensional code by a device after a reaction is complete and color development becomes stable in order to obtain detection information. The steps of the method are simple, the made activity detection two-dimensional code is displayed through the color development reaction of the functional ink and the solution to be detected and is identified by the device to obtain relevant information, the reaction can be completely carried out on a paper base, and the activity detection two-dimensional code can be widely applied to the field of biological detection and chemical detection.

The invention provides an organic light-emitting device and a manufacturing method thereof. The organic light emitting device includes a thin film transistor substrate, a pixel electrode layer, a pixel defining layer and a pixel layer in order from bottom to top. Wherein, the pixel layer is formed by spraying pixel ink on the pixel electrode layer in the pixel defining groove by inkjet printing and drying to form a film, and the pixel ink contains a hydrophobic solvent to be hydrophobic. The manufacturing method of the organic light-emitting device includes the steps of: providing a thin film transistor substrate, manufacturing a pixel electrode layer, manufacturing a pixel definition layer, and manufacturing a pixel layer. In the present invention, adding a hydrophobic solvent to the pixel ink to make it hydrophobic can solve the coffee ring effect in the inkjet printing process, make the film surface of the pixel layer uniform, and thereby improve the luminous performance.

The invention discloses a hole injection layer ink for inkjet printing and its application in organic light-emitting display. The ink is prepared by mixing PEDOT aqueous solution and isopropanol. The ink is printed into a PEDOT film by an inkjet printer on the region of the organic light-emitting display pixel on the substrate that has been treated with oxygen plasma and carbon tetrafluoride plasma. The composition and preparation method of the PEDOT ink of the present invention are simple, the performance of the co-solvent is stable, the content is low and the volatility is strong, and it is easy to dry and remove after printing and forming a film, and will not cause rough surface of the PEDOT film and changes in electrical properties due to too long drying time. . The PEDOT film has high uniformity, and there is no obvious phenomenon of being thin in the middle and thick at the edge, which avoids the coffee ring effect. Moreover, the height matching between the etched isolation column and multiple functional layers is improved. It has a good application prospect.

The invention provides a method for rapidly detecting bacterial endotoxin based on surface-assisted laser desorption ionization mass spectrometry. The method prepares a zinc ferrite chitosan compositeand takes the zinc ferrite chitosan composite as a matrix, and a method for rapidly detecting the bacterial endotoxin based on an organic mass spectrometry technology is developed to overcome a coffee-ring effect of a traditional organic matrix and facilitate the rapid detection of the bacterial endotoxin. The method has the advantages that no complex sample pretreatment is needed, the sample consumption amount is small (about 0.1muL), the sample preparation is simple, the time consumption is less, the salt tolerance is good, and the reproducibility is good and the like, and has a good application prospect in the fields of food and drug safety.

The invention discloses a chip sintered product, a sub unit, an IGBT packaging module and a preparation method. The chip sintered product comprises a first molybdenum sheet, a second molybdenum sheetand a chip placed between the first and second molybdenum sheets; at least one of the first and second molybdenum sheets is a prefabricated molybdenum sheet; the prefabricated molybdenum sheet is a molybdenum sheet with a prefabricated nanometer silver film on the surface; in addition, at least one surface of the chip is in contact with the prefabricated nanometer silver film; by adoption of the prefabricated nanometer silver film, distribution uniformity of nanometer silver particles in the subsequent pressuring and sintering process can be improved effectively, a "coffee ring effect" can beavoided, and thermal resistance can be lowered; meanwhile, it is ensured that nano-scale holes are uniformly distributed in a sintering layer obtained by sintering, and by virtue of the nano-scale holes, stress generated between the chip and the molybdenum sheet can be lowered effectively, and the shearing strength of the chip sintered product is improved; and by adoption of the chip sintered product and the IGB packaging module with low thermal resistance and high shearing strength, the sintering layer obtained by sintering the prefabricated nanometer silver film has high compactness, and thenano-scale holes are distributed.

The invention belongs a thin film producing technic field, in particular, a boundary slef-restriction thin film producing method. The method comprises steps of firstly forming an obstructing layer on a glass or plastic substrate, forming a thin film above the obstructing layer by using a solution or a suspension of a film forming material of the obstructing layer having solubility or dispersibility and by a printing method, etc., forming a boundary at edges of a film-forming region by a self-bank effect, then performing anneal process on the substrate based on request, and removing the obstructing layer. The formed boundary slef-restriction thin film has a continuous boundary and a good film thickness uniformity. The produced thin film can be used in a printed circuit board (PCB), an organic light emitting diode (OLED), an organic field effect tube (OFET), a color filer (CF), a micro-lens, etc.