1049results about "From normal temperature solutions" patented technology

The invention discloses a series of alkali metal borate compounds and alkali metal borate crystals as well as a preparation method and application thereof, and belongs to the technical field of photoelectric functional crystal materials. The chemical general formula of the series of compounds and crystals thereof is A3RE (B3O6) 2, wherein A is K, Rb, Cs or NH4; rE = Sc and Y, the molecular weight is 355.93-744.48, the series of crystals belong to a trigonal system, the space group is P321, the cell parameters a = b = 10.5237 (13)-135237 (13), and # imgabs0 # Z = 3. The series of alkali metal borate compounds are synthesized by adopting a solid-phase reaction method or a hydrothermal method, and the series of crystals grow by adopting a high-temperature melt method or a hydrothermal method or a solution method. The series of materials can be used for manufacturing second harmonic generators, upper and lower frequency converters, optical parametric oscillators, polarizing prisms and the like.

The invention discloses a method for regulating the length-diameter ratio of calcium sulfate hemihydrate whiskers prepared from ardealite, and belongs to the field of ardealite resource utilization. According to the invention, carbohydrates, alcohols and other substances containing hydroxyl groups are used as the crystal modifier, and the calcium sulfate hemihydrate whisker is prepared by regulating and controlling phosphogypsum through a normal-pressure hydrothermal method, so that the length-diameter ratio of the whisker is regulated and controlled within a certain range. The method solves the problems that the length-diameter ratio of the whisker in the calcium sulfate hemihydrate whisker product prepared from ardealite is not uniform and cannot be regulated and controlled, the preparation process is tedious, the corrosivity is strong due to excessive salt solution in the reaction system, and the waste liquid has great harm to the environment, and has a good application prospect.

The invention relates to a black-phase all-inorganic perovskite flexible thick film stable at room temperature and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing PbI2, CsI and an organic ammonium salt in an organic solvent to obtain a perovskite precursor solution; filling a polymer filter membrane with the perovskite precursor solution through a vacuum filtration method to obtain a wet flexible thick membrane; the polymer filter membrane is cleaned, and the thickness is 50 microns or above; and carrying out gradient annealing on the wet flexible thick film to obtain the black-phase all-inorganic perovskite flexible thick film which is stable at room temperature. According to the invention, low-dimensional perovskite induced lattice distortion is formed by adding A-site cations, and the flexible thick film which is thermodynamically stable and uniform at room temperature is obtained based on a solvent suction filtration method by regulating and controlling the addition amount of organic ammonium salt and gradient annealing and regulating and controlling the proportion of residual organic ammonium salt of lattices, and is applied to an X-ray detector. High [mu] [tau] product and high sensitivity are realized, and good flexible detection performance is shown.

Disclosed in the present invention is a method for in-situ NH4I-assisted preparation of CsPbI3 colloidal nanoplateles, comprising the following steps: S1. respectively preparing a lead iodide precursor solution, an ammonium iodide precursor solution, and a cesium oleate precursor solution; and S2. mixing the lead iodide precursor solution with the ammonium iodide precursor solution under stirring, adding the cesium oleate precursor solution for reaction to obtain a nanoplatele stock solution, and purifying and separating the nanoplatele stock solution to obtain CsPbI3 nanoplateles. In the present invention, in the method for the in-situ NH4I-assisted preparation of CsPbI3 colloidal nanoplateles, NH4I is used for in-situ replication synthesis of the CsPbI3 nanoplateles, the regulation of the growth kinetics of a system is achieved, the reaction process is more controllable, and the synthesized nanoplateles have a narrower peak width at half height, and a more uniform phase distribution, meeting requirements of light emitting in a red light range.

The invention discloses a low-dimensional organic-alkali metal-copper (I) halide supramolecular scintillator based on crown ether assisted self-assembly, a synthesis method thereof and application of the low-dimensional organic-alkali metal-copper (I) halide supramolecular scintillator in single crystal X-ray imaging. A series of supramolecular scintillators are successfully synthesized by adopting a supramolecular coordination strategy of crown ether (L) and alkali metal ions (M) and a saturated solution volatilization method. By optimizing the crown ether coordination mode, controllable preparation of large-size single crystals is achieved, the optical and X-ray imaging performance of the large-size single crystals is improved, a new thought is provided for research and development of novel high-performance X-ray scintillators, and the application potential of the supramolecular scintillators in the field of high-resolution single crystal X-ray imaging is expanded.

The invention discloses preparation and application of a millimeter-scale high-uniformity bastnaesite single crystal electron probe standard sample, and the preparation method comprises the following steps: taking CeF3 and carbonate as raw materials, carrying out solid phase mixing, carrying out a hydrothermal reaction at 400-500 DEG C under water self-generated saturated vapor pressure, and carrying out programmed cooling, washing and drying to obtain a CeCO3F single crystal which has a millimeter-scale size and does not contain Nd and other rare earth impurities. The spectrum peak overlapping interference in EPMA analysis is eliminated from the source, the internal elements are highly uniformly distributed, and the relative standard deviation (RSD) of the distribution of the key element Ce is less than 1.0%. The method is simple in process, low in cost and mild in condition, the limitation that millimeter-level single crystals are difficult to prepare through a traditional method is broken through, and the obtained single crystal standard sample has the advantages of being high in crystallinity, good in stability, high in matching degree with a natural geological sample matrix and the like, is suitable for electron probe analysis, especially high-precision quantitative analysis of rare earth element Ce and has good application prospects. And the accuracy and reliability of an analysis result can be effectively improved.

A method of producing crystalline cellulose from a cellulosic material includes the step of reacting the cellulosic material in an aqueous slurry comprising a transition metal catalyst and a hypohalite solution.

There is provided a gallium nitride single crystal substrate, which is a gallium nitride single crystal substrate having a diameter of 50 mm or more, with a low-index crystal plane closest to a main surface being (0001), and in which an average density of etch pits during etching applied to the main surface using an alkaline etching solution is less than 1×106 cm−2; and in histograms of diameters of the etch pits in multiple different regions on the main surface, and among peaks appearing in the histograms, when a diameter of a first peak which is a smallest diameter is denoted as a, a diameter of a second peak which is a second smallest diameter is denoted as b, frequency of the first peak (the number of etch pits) is denoted as A, frequency of the second peak is denoted as B, the number of the etch pits constituting the first peak is denoted as α, and the number of the etch pits constituting the second peak is denoted as β, at least one of the following conditions (1), (2), and (3) is satisfied: (1) variation in a / b values in the multiple histograms is within ±5% of an average value. (2) variation in A / B values in the multiple histograms is within ±15% of an average value. (3) variation in α / β values in the multiple histograms is within ±30% of an average value.

The invention relates to a metal oxide precursor and a preparation method and application thereof. The metal oxide precursor is of a single-crystal structure and has N groups of three-level ratio particle distribution, any group of three-level ratio sequentially comprises first-level particles, second-level particles and third-level particles according to particle size decreasing arrangement, and the volume accumulation rate of the metal oxide precursor is eta gt; x1i, X2i and X3i are the particle sizes of the first-stage particles, the second-stage particles and the third-stage particles respectively, and the unit of the X1i, the unit of the X2i and the unit of the X3i are all microns; h is the side length of the stacking volume, and the unit is [mu] m; n is the number of particles contained in a single side of the accumulation volume, and ni = h / X1i; a is equal to 0.56812, b is equal to-1.777, c is equal to 31.029, and d is equal to-0.0289; epsilon is an error coefficient, and 0.99 < = epsilon < = 1.01. The metal oxide precursor provided by the invention has multi-stage proportion particle distribution, meets a specific volume accumulation rate, and can reach a high tap density of 1.3 g / cm < 3 > to 3.4 g / cm < 3 >.

A metal oxide precursor, a preparation method therefor, and a use thereof. The metal oxide precursor comprises dispersed single crystal particles and agglomerate particles partially formed by the single crystal particles; the dispersion degree K of the metal oxide precursor is 0.467 to 0.917, and K=D50 / (η×D90), wherein D50 is the corresponding particle size when the cumulative particle size distribution percentage of the metal oxide precursor reaches 50%, D90 is the corresponding particle size when the cumulative particle size distribution percentage of the metal oxide precursor reaches 90%, η is the volume deviation coefficient, and η is equal to 0.6.

Embodiments can relate to an improved hydroflux, additive or electroless plating assisted densification cold sintering process to densify powdered metals at lower compaction pressures and lower temperatures (e.g., 520 MPa and 140° C.). The process can involve inducing dissolution precipitation mechanisms at powder interfaces by introducing a transport phase (formed by the introduction of water during the process to suppress melting temperatures) that is not an aqueous solution. Particle interfaces in the cold sinter fuse together by the presence of the additional transport phase, thereby reducing the temperatures and pressures needed for compaction. Some embodiments involve the use of elements to form a eutectic at the desired low temperature, thereby stabilizing certain crystal structure shapes of isometric crystal systems, inducing rapid densification, and facilitating pore smoothing. Embodiments of the process can be used to generate a green compact via sintering that exhibits improved green strength.

The invention belongs to the technical field of lead iodide crystal preparation, and discloses a lead iodide crystal and a method for adjusting the preferred orientation of a lead iodide crystal face, the method for adjusting the preferred orientation of the lead iodide crystal face comprises the following steps: step 1, adding an acid solution into a lead iodide solution, and diluting the lead iodide solution until the concentration of lead iodide is 10mM-50mM; 2, the diluted lead iodide solution is subjected to aging treatment, a solid-liquid mixture is obtained, the aging temperature ranges from 25 DEG C to 120 DEG C, the aging pressure is smaller than or equal to 6 Mpa, and the aging time ranges from 2 h to 4 h; and step 3, controlling the cooling rate of the solid-liquid mixture to be 6-10 DEG C / min for cooling, and then separating to obtain solid lead iodide. According to the method disclosed by the invention, the preferred growth condition of the lead iodide crystal face is controlled through concentration control, an aging process and a sectional cooling process under the condition that a complexing agent, a surfactant or a template agent does not need to be additionally added.

The invention provides a preparation method and application of a compound cesium ammonium fluoborate and a cesium ammonium fluoborate nonlinear optical crystal. The chemical formula of the compound is CsNH4B8O12F2; the chemical formula of the crystal is CsNH4B8O12F2, the crystal belongs to a trigonal system, the space group is P321, and the unit cell parameters are as follows: a = b = 6.5858 (4) + / -0.02, c = 7.8163 (6) + / -0.02, alpha = beta = 90 degrees, gamma = 120 degrees and Z = 1. The crystal is grown by adopting a vacuum high-temperature solution method, a room-temperature solution method or a hydrothermal method, and the ultraviolet transmission cut-off edge of the crystal is lower than 190 nm. The nonlinear optical effect of the crystal is about 2.5 times of that of KH2PO4 (KDP), and the shortest I-type phase matching wavelength is 175.5 nm. The crystal has the advantages of simple preparation method, low toxicity of used initial raw materials, small harm to human bodies, stable physical and chemical properties, uniaxial crystal, easiness in application and the like. The method can be widely applied to nonlinear optical devices such as ultraviolet and deep ultraviolet all-solid-state lasers, optical parametric oscillators and the like.

The invention discloses an organic-inorganic hybrid zero-dimensional halide perovskite single crystal material and a preparation method thereof. The chemical formula of the organic-inorganic hybrid zero-dimensional halide perovskite single crystal material is PMA4InCl7.H2O, and the chemical formula of the antimony-doped single crystal material is PMA4InCl7.H2O: Sb, the corresponding single crystal material is obtained through the steps of raw material adding, cooling crystallization, suction filtration, drying and the like. The optical band gap of the PMA4InCl7. H2O is determined to be 4-5 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O shows light blue; the optical band gap of the PMA4InCl7. H2O: Sb is determined to be 3-4 eV through an ultraviolet-visible spectrophotometer, and when the PMA4InCl7. H2O: Sb is irradiated by a 365 nm portable ultraviolet lamp, the PMA4InCl7. H2O: Sb shows bright yellow. The maximum quantum yield measured by an absolute fluorescence quantum yield spectrometer can reach 72%.

The invention discloses a morphology control method for preparing alpha-semi-hydrated gypsum by using desulfurized gypsum in an ethylene glycol-water system, which comprises the following steps: (1) mother liquor preparation: mixing inorganic salt, a crystal modifier and an ethylene glycol water solution to prepare a mother liquor; (2) feeding and crystal transformation: feeding the desulfurized gypsum into the mother liquor, mixing to form turbid liquid with specific solid content, and carrying out crystal transformation reaction under the normal-pressure hydrothermal condition of 80-100 DEG C; and (3) product collection: carrying out solid-liquid separation on the turbid liquid after the crystal transformation reaction, and washing and drying the solid phase to obtain the alpha-semi-hydrated gypsum. The invention provides a morphology regulation method of alpha-semi-hydrated gypsum prepared from desulfurized gypsum in an ethylene glycol water system, which can be used for preparing alpha-semi-hydrated gypsum with four different morphologies of nickel coin shape, short column shape, long rod shape and whisker shape at a relatively high conversion rate, and realizing large-range flexible regulation of average length-diameter ratio from 0.1-80.

The invention belongs to the field of synthesis of luminescent materials, and relates to a preparation method and application of a zero-dimensional manganese-based hybrid halide nanofiber membrane with reversible photoluminescence and radiation luminescence conversion. The synthetic route is as follows: preparing a precursor from 4-dimethylaminopyridine (DMAP) and hydrochloric acid, then synthesizing zero-dimensional organic-inorganic metal chloride with manganese chloride hydrate (MnCl2. 4H2O) and anhydrous manganese chloride (MnCl2), further mixing the zero-dimensional organic-inorganic metal chloride with polyvinylidene fluoride (PVDF), and performing electrostatic spinning to obtain a nanofiber film; compared with the prior art, the stimuli-responsive reversible PL switch flexible fiber membrane prepared by adopting an electrostatic spinning technology has excellent stability and PL switch performance, and can show efficient PL and RL switching under external stimuli. Meanwhile, the flexible nanofiber film produced by the method has the advantages of one-step synthesis, quick response, repeatability, good portability and low cost, so that the flexible nanofiber film becomes a new application of molecular-level dynamic photonic devices for data storage, information security, optical logic gates, flexible X-ray imaging and the like.

The invention belongs to the field of crystal growth of quartz crystals, and particularly provides a plug-in type seed crystal rack which comprises a seed crystal rack upright post assembly, a seed crystal rack ring, a suspension cross beam, a V-shaped fixing groove for mounting a seed crystal plate, a gasket and a fixing piece for fixing the seed crystal rack ring and the seed crystal rack upright post assembly, a plurality of mutually parallel suspension cross beams are arranged in the seed crystal frame ring, a plurality of mutually parallel V-shaped fixing grooves are formed in each suspension cross beam, and gaskets are arranged in notches of the V-shaped fixing grooves. According to the invention, a plurality of seed wafers can be hung conveniently, and the adhesion of the grown quartz crystal and the stainless steel fixing groove can be prevented.

The invention relates to the technical field of desulfurization gypsum treatment, in particular to a process for preparing high-purity calcium sulfate whiskers from desulfurization gypsum. The invention discloses a process for preparing high-purity calcium sulfate whiskers from desulfurized gypsum, which comprises the following steps: adding water to prepare the desulfurized gypsum into slurry, and adding a dispersing agent for dispersing; an oxidizing agent is added into the slurry for an oxidation reaction, solid-liquid separation is performed after the oxidation reaction is completed, and oxidized gypsum and oxidized liquid are obtained; dissolving the oxidized gypsum by using an acid solution to obtain acid-soluble slurry; adding an additive and a regulator into the acid-soluble slurry, and carrying out hydrothermal reaction to obtain regulated slurry after the reaction is finished; and carrying out solid-liquid separation on the adjusted slurry, and then rinsing and drying to obtain the calcium sulfate whiskers. According to the process disclosed by the invention, the high-purity calcium sulfate whisker can be obtained, and the problems of difficulty in impurity removal, difficulty in morphology control and possibility of secondary pollution in a traditional method are solved.

The invention relates to an extensible preparation method of an ultrathin two-dimensional MOF / GO / MOF (MGM) sandwich-shaped single-crystal nanosheet and application of the ultrathin two-dimensional MOF / GO / MOF (MGM) sandwich-shaped single-crystal nanosheet in the fields of electrochemical energy storage, electrocatalysis and the like. According to the method, large-scale controllable synthesis of the ultrathin two-dimensional MGM sandwich-shaped single-crystal nanosheet is realized through assistance of graphene oxide (GO) and ethylene glycol (EG). The preparation method comprises the following specific steps: preparation of a GO dispersion liquid, preparation of a # imgabs0 # mixed dispersion liquid, preparation of the MGMX ultrathin nanosheet, and preparation of the MGMX-ABDC, MGMX-FBDC and MGMX-BPDC two-dimensional monocrystal ultrathin nanosheets through a one-pot method. The method disclosed by the invention has the advantages of simple and convenient process, high efficiency, strong expandability and the like, is suitable for various MOF ligand systems, remarkably solves the technical bottleneck that the two-dimensional MOF is difficult to prepare on a large scale, and has a good industrial application prospect.

The invention relates to the technical field of semiconductors, and particularly discloses a structure optimization method of a seed rod for liquid phase method silicon carbide crystal growth. Comprising the following steps: 1) horizontally dividing a graphite support into an upper-layer structure and a lower-layer structure, integrating the top of the upper-layer graphite support and a graphite rod, adhering a seed crystal to the lower surface of the lower-layer graphite support, and detachably and fixedly connecting the upper-layer graphite support and the lower-layer graphite support; 2) arranging at least one first cushion layer between the upper graphite support and the lower graphite support, and adjusting the axial temperature gradient of the back surface of the seed crystal by controlling the number of the first cushion layers; and (3) arranging a second cushion layer, and enabling the temperature of the lower graphite support to be uniformly distributed by utilizing the second cushion layer. The structure of the seed crystal rod is optimized, the graphite support is subjected to split type structural design, axial temperature distribution of silicon carbide crystals can be finely adjusted by adding different numbers of first cushion layers, and radial temperature distribution of the graphite support can be adjusted by adding second cushion layers; the split type graphite support saves manufacturing cost, and avoids the problem of eccentricity generated by assembling the graphite support and the graphite rod.

The invention relates to the field of KAP crystals, in particular to an elliptical KAP crystal and a preparation method thereof. Through MOFs in-situ growth, atomization spraying induced molecular orientation assembly and ultraviolet light initiated crosslinking, the mechanical strength, the super-hydrophobicity and the irradiation stability are improved, meanwhile, the optical performance of the crystal is kept, and a brand new solution is provided for application of the KAP crystal in the emerging fields of ocean sensing, flexible photoelectricity and the like.

Embodiments can relate to an improved hydroflux, additive or electroless plating assisted densification cold sintering process to densify powdered metals at lower compaction pressures and lower temperatures (e.g., 520 MPa and 140° C.). The process can involve inducing dissolution precipitation mechanisms at powder interfaces by introducing a transport phase (formed by the introduction of water during the process to suppress melting temperatures) that is not an aqueous solution. Particle interfaces in the cold sinter fuse together by the presence of the additional transport phase, thereby reducing the temperatures and pressures needed for compaction. Some embodiments involve the use of elements to form a eutectic at the desired low temperature, thereby stabilizing certain crystal structure shapes of isometric crystal systems, inducing rapid densification, and facilitating pore smoothing. Embodiments of the process can be used to generate a green compact via sintering that exhibits improved green strength.

The invention provides a method for preparing high-purity calcium sulfate dihydrate whiskers from fluorgypsum. The preparation method comprises the following steps: drying the fluorgypsum and preparing fluorgypsum powder; mixing the fluorgypsum powder with a sodium acetate solution, and reacting to obtain a mixed solution; performing solid-liquid separation on the mixed solution to obtain a first filtrate; adding sodium sulfate into the first filtrate, and aging to obtain a filter cake; washing and drying the filter cake to obtain high-purity calcium sulfate dihydrate whiskers; wherein the phase of the high-purity calcium sulfate dihydrate whisker is a gypsum phase, the content of calcium sulfate dihydrate is greater than 98%, the whiteness is greater than 94, the diameter of the whisker is 5-20 microns, the length-diameter ratio is 15-40, and the microscopic morphology is fibrous. The anhydrous calcium sulfate in the fluorgypsum is directly and completely utilized, and the method has important significance on reduction of the fluorgypsum.

The invention belongs to the technical field of chiral material preparation, and particularly relates to a one-dimensional bismuth-based chiral perovskite crystal and a preparation method and application thereof. The general formula of the chiral perovskite crystal is (R-beta-MPA) 2BiI5 or (S-beta-MPA) 2BiI5, the chemical formula of the chiral perovskite crystal is C18H28BiI5N2, the R-beta-MPA represents (R)-(+)-beta-methyl phenylethylamine, the S-beta-MPA represents (S)-(-)-beta-methyl phenylethylamine, the R-beta-MPA represents (R)-(+)-beta-methyl phenylethylamine, and the S-beta-MPA represents (S)-(-)-beta-methyl phenylethylamine. The crystallographic data of the (R-beta-MPA) 2BiI5 include that the crystal belongs to an orthorhombic crystal system and a P212121 space group, and the cell parameters are as follows: alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 90 degrees; the crystallographic data of the (S-beta-MPA) 2BiI5 comprises that the crystal belongs to an orthorhombic crystal system and a P212121 space group, and the cell parameters are as follows: alpha is equal to 90 degrees, beta is equal to 90 degrees, and gamma is equal to 90 degrees.

The invention provides an antimony-based chalcogenide film with (hk1) dominant orientation and a preparation method and application thereof, and belongs to the technical field of semiconductor photovoltaic materials. According to the method, the crystal orientation of the antimony-based chalcogenide film is regulated and controlled by doping PbI2 in situ under the simple solution method (water bath or hydrothermal) deposition condition, and research results show that the solution method is adopted to introduce PbI2, so that the antimony-based chalcogenide film can be remarkably induced to preferentially grow along the (hk1) direction, grain boundary scattering and inter-chain potential barriers are effectively weakened, and the crystal orientation of the antimony-based chalcogenide film is improved. The carrier longitudinal migration and collection efficiency is improved, so that the VOC loss is reduced, and the final battery performance is improved; the method provided by the invention not only provides a new thought for preparing the high-orientation antimony-based chalcogenide film, but also lays a technical foundation for design and optimization of a bottom battery material in a future laminated battery.

The present invention relates to single-crystal spherical carbon nanoparticles that are single-crystals, are spherical, and have an average particle diameter of 1 nm to 30 nm. The single-crystal spherical carbon nanoparticles of the present invention can generate fluorescence with a high fluorescence quantum efficiency when excited by a light in wide wavelength range from ultraviolet light to visible light, and have fluorescence quantum efficiency of 10% or more compared to conventionally known carbon nanoparticles. The single-crystal spherical carbon nanoparticles can be used for drug delivery, because they do not have toxicities to living organisms that compound semiconductors made of cadmium, selenium, tellurium, and the like have. Furthermore, since the single-crystal spherical carbon nanoparticles are spherical, they can be densely packed as electrode materials for solar cells and secondary ion batteries, and can be used for negative electrode for lithium ion batteries or electrode material for solar cells.

To provide a process for forming drug crystals of narrow size distribution and desire dimensions and morphology.SOLUTION: The present invention relates to a process for providing corticosteroid crystals of desired size distribution and morphology, the process comprising the steps of: providing recrystallized ultra-large columnar crystals having aspect ratios of more than 1 and less than 20, the aspect ratio of a given columnar crystal being the ratio of a longest dimension along a lengthwise axis relative to a shortest dimension of a transverse plane perpendicular to the lengthwise axis; and sizing the recrystallized ultra-large columnar crystals to provide a collection of sized crystals having target dimensions, wherein the sizing includes segmenting at least a part of the recrystallized ultra-large columnar crystals along the respective lengthwise axes while retaining the dimensions of the transverse plane perpendicular to the lengthwise axis.SELECTED DRAWING: None

The invention provides a fleroxacin salicylic acid drug salt single crystal prepared from acetylsalicylic acid and a preparation method thereof. The preparation method comprises the following steps: dissolving acetylsalicylic acid and fleroxacin in 8-15 mL of a solution formed by mixing one, two or more than two solvents of water, ethanol and methanol according to a certain molar ratio; and putting the mixed solution in a constant-temperature water bath at 40-80 DEG C, and stirring for 1-5 hours. And after full reaction, volatilizing the mixed solution in a suitable environment to obtain colorless blocky crystals after 1-30 days, namely the fleroxacin salicylic acid drug salt single crystals. The crystal can effectively improve the solubility, moisture absorption stability and permeability of fleroxacin. Compared with fleroxacin, the fleroxacin salicylic acid drug salt single crystal has the advantages that the bacteriostatic effect and the inflammatory factor level reducing effect are improved, and the fleroxacin salicylic acid drug salt single crystal has good antibacterial and anti-inflammatory effects.

The invention belongs to the field of bionic electronic materials and application, and discloses a dipeptide amino acid sequence with a piezoelectric effect, a dipeptide piezoelectric fiber film is prepared from the dipeptide amino acid sequence through a drop casting method, a meniscus driving method and an electric field induction meniscus driving method, and the obtained fiber film is assembled into an application example of a piezoelectric generator. The amino acid sequence of the dipeptide with the piezoelectric effect is Fc-L-Phe-L-Phe-OH, in the formula, Fc is a ferrocene benzoic acid group, Phe represents phenylalanine, and L represents the chirality of used amino acid. The dipeptide micron fiber thin film which is large in area and closely arranged is prepared by utilizing a drop casting method, a semilunar driving method and various methods of introducing a regulation and control electric field in a semilunar driving method membrane preparation process. The obtained fiber film is assembled into a piezoelectric generator of a sandwich structure, the piezoelectric output performance of the piezoelectric generator is closely related to the preparation method of the fiber film, and the piezoelectric performance of the dipeptide fiber film can be remarkably improved through an electric field induction meniscus driving method.