CN105950134A - Material for fabricating high-definition and high-sensitivity identification fingerprints and fingerprint identification method - Google Patents
Material for fabricating high-definition and high-sensitivity identification fingerprints and fingerprint identification method Download PDFInfo
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- CN105950134A CN105950134A CN201610305157.4A CN201610305157A CN105950134A CN 105950134 A CN105950134 A CN 105950134A CN 201610305157 A CN201610305157 A CN 201610305157A CN 105950134 A CN105950134 A CN 105950134A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/117—Identification of persons
- A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
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- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
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- C09K11/88—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing selenium, tellurium or unspecified chalcogen elements
- C09K11/881—Chalcogenides
- C09K11/883—Chalcogenides with zinc or cadmium
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0069—Electro-spinning characterised by the electro-spinning apparatus characterised by the spinning section, e.g. capillary tube, protrusion or pin
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- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
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- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
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- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/90—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
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- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
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Abstract
The invention relates to a material for fabricating high-definition and high-sensitivity identification fingerprints and a fingerprint identification method. The material for fabricating high-definition and high-sensitivity identification fingerprints comprises a fingerprint carrying object, namely, a nano-nylon film, and a quantum dot which is used for identifying the fingerprints through fluorescent developing and synthesized with a high-temperature organic-phase synthesis process; the nano-nylon film is prepared from a nylon type polymer material taken as a main spinning material, is obtained through electrostatic spinning and is provided with crude and fine fibers distributed in a staggered manner. The material is used for the fingerprint identification method, the process is simple and convenient, the quantum dot need not be further modified or treated with cyanoacrylate or other fluorescent reagents, and fingerprint display with high fluorescent contrast can be obtained within short time, and a fingerprint third-level structure including sweat-gland pores can be displayed clearly.
Description
Technical field
The invention belongs to field of new, be specifically related to a kind of make high-resolution, the material of sensitive identification fingerprint and fingerprint identification method.Can be applicable to nano material analytical technology and fingerprinting detection technique field.
Background technology
Fingerprint is the lines that finger tips refers to that on abdominal part, concavo-convex skin is constituted.And the finger fold ridge design that fingerprint of diving stays after referring to finger contact object on object plane.These decorative patterns objectively can not needed just can demonstrate primary morphology through certain process means by naked eyes identification, so being referred to as latent fingerprint.Owing to individual fingerprint has uniqueness and an invariance, therefore fingerprint recognition will become the most attractive and determine means.Generally fingerprint is after stamp, and the material staying object plane surface is less, and wherein the moisture of 99% can evaporate rapidly, and in the material of residue about 1%, about 50% is the inorganic matter such as sodium chloride, potassium chloride, and fingerprint manifestation is not almost worth by they；But but can reach clearly to present the ability of fingerprint after the organic principles such as the oils and fats only deposited, aminoacid and fluorescent material effect, therefore finding the reagent highly sensitive with fingerprint organic residue effect is to improve fingerprint manifestation rate and an important process of definition.
Present stage physics manifests extraction means mainly has powder appearance method, cryogenic technique to manifest extraction method, vacuum metal deposition, manifest extraction method, laser appearance method, optical check method etc..Chemistry manifests extraction means and is changed into visible or recognizable mainly by the feature of newly-generated material by non-visible or None-identified fingerprint.The most commonplace chemical appearance method has iodine fumigation, silver nitrate method, 1,2,3-indantrione monohydrate, DFO method, " 502 " glue method etc..The authentication method of the latent fingerprint of tradition exists a lot of not enough, such as insufficient sensitivity, the most affected by environment etc..Secondly the complicated loaded down with trivial details preprocessing process of traditional method needs, such as cyanoacrylate process or vacuum metal deposition, also to utilize expensive optical device observing and analyze in fingerprinting process.
Fluorescence quantum nano material has the excellent photoluminescent property such as emission spectrum continuously adjustabe, wide, the fluorescence lifetime length of absorption spectrum, has become as the attractive reagent improving developing latent finger prints extraction effect.Patent CN200810056422 discloses " using the method that quantum point type photoluminescent reagent manifests latent fingerprint ", and golden nanometer particle and CdSe/CdS core-shell nano material are successively deposited on fingerprint lines by it by many metalidings, it is achieved latent fingerprint shows.Golden nanometer particle is combined on fingerprint secretions by many metalidings the most in acid condition by electrostatic interaction, subsequently another kind nanoparticle (Au, Ag or quantum dot) is grown in golden nanometer particle surface.But the method needs multiple water-bath and time immersion different in size, and pH also must be maintained at 2.5 3.0.Patent CN201010569046 discloses " preparation method of fingerprint manifestation Water Soluble Compound InP/ZnS fluorescence quantum ", and it is immersed in water miscible InP/ZnS shows latent fingerprint by being loaded with the adhesive tape of fingerprint.Patent CN201210154555 discloses " application in fingerprint manifestation of the ZnX semiconductor-quantum-point of a kind of polyamide-amide dendrimer cladding ".These methods use surface to be combined by electrostatic interaction with part quantum dot and the fingerprint composition of carboxyl or amino to reach to manifest fingerprint purpose.But the quantum dot quantum productivity of synthesis in water is low, half-peak is wide, less stable.Comparatively speaking, the nanoparticle crystal defect of organic synthesis is few, and fluorescence property is excellent.But usually, if the compositions such as the direct quantum dot solution that the carrier such as glass, the aluminium foil etc. that are loaded with fingerprint are immersed in organic synthesis, the protein in fingerprint and fat dissolve in organic solvent, fingerprint lines is seriously damaged thus cannot show fingerprint.Prior art has been reported that will smoke carrier with cyanoacrylate.After the most first carrier being carried out the process of cyanoacrylate surface, then carrier is immersed in organic synthesis quantum dot, but complex procedures, and cyanoacrylate processes overlong time exhibit and can become Chalk shape.Additionally cyanoacrylate processes and is not particularly suited for porous surface.
Summary of the invention
The technical problem to be solved is to provide and a kind of makes high-resolution, the material of sensitive identification fingerprint and fingerprint identification method.The method is easy, quick, accurate, lossless and can preserve for a long time.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
There is provided a kind of and make high-resolution, the material of sensitive identification fingerprint, the quantum dot that the high temperature organic synthesis method including fingerprint carrying object nano-nylon thin film with for fluorescence developing identification fingerprint synthesizes；Described nano-nylon thin film is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered.
By such scheme, described Nylon-type polymer is nylon 6, nylon66 fiber, nylon 11, nylon 56, nylon 12, NYLON610, nylon 612, Stanyl (DSM)., nylon 1010, nylon 7, nylon 9, nylon 13, the one in nylon 9 T, or the mixture of any two or three polymer.Described polymer includes the mixture of homopolymer, block copolymer, random copolymer, the mixture of two kinds of different homopolymer, homopolymer and the mixture of block copolymer and homopolymer and random copolymer.
By such scheme, the preparation method of described nano-nylon thin film: Nylon-type polymer material and inorganic salts additive are dissolved in a solvent, is configured to uniform spinning liquid；Spinning liquid being carried out electrostatic spinning, obtains nano-nylon thin film, the process conditions of electrostatic spinning are: voltage 5～50KV, receiving range 3～25cm, spinning liquid fltting speed 0.1～10mL/h, temperature 10～50 DEG C.
By such scheme, in described nano-nylon thin-film material, the average diameter of nylon fiber is 50-80nm.
By such scheme, the kind of described quantum dot is CdS, CdSe monokaryon quantum dot, CdSe/ZnS, CdSe/CdS/ZnS core-shell quanta dots, CdxZn1 – xS、CdSe/CdxZn1 – xS alloy quantum dot, X value is one or more in 0-1, and the surface ligand of quantum dot is: one or more in trioctylphosphine (TOPO), tri-n-octyl phosphine (TOP), tributylphosphine (TBP), 1-octadecylene (ODE), oleyl amine (Oleylamine), oleic acid (Oleic acid).
By such scheme, the quantum dot that the described high temperature organic synthesis method for fluorescence developing identification synthesizes exists in the form of a solution, and the solvent of dispersion quantum dot solution includes but not limited to hexane, dichloromethane, petroleum ether, heptane.
There is provided a kind of and make high-resolution, the method for sensitive identification fingerprint, comprise the following steps:
(1) nano-nylon thin film is used to make fingerprint carrying object, finger is pressed lightly on fingerprint carrying object, or the smooth surface that fingerprint carrying object is pressed against fingerprint obtains carrying the nano-nylon thin film of latent fingerprint, described nano-nylon thin film is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered；
(2) in the solution of the quantum dot that the nano-nylon thin film carrying fingerprint that step (1) obtains is put into the synthesis of high temperature organic synthesis method, soaking 10s～5min under room temperature, in immersion process, concussion is loaded with the nano-nylon thin film of fingerprint；
(3) deionized water cleans the nano-nylon thin film being loaded with fingerprint, is placed on darkroom after drying, shoots into fingerprint image with 300～400nm ultraviolet excitations.
By such scheme, described Nylon-type polymer is nylon 6, nylon66 fiber, nylon 11, nylon 56, nylon 12, NYLON610, nylon 612, Stanyl (DSM)., nylon 1010, nylon 7, nylon 9, nylon 13, the one in nylon 9 T, or the mixture of any two or three polymer.Described polymer includes the mixture of homopolymer, block copolymer, random copolymer, the mixture of two kinds of different homopolymer, homopolymer and the mixture of block copolymer and homopolymer and random copolymer.
By such scheme, the preparation method of described nano-nylon thin film: Nylon-type polymer material and inorganic salts additive are dissolved in a solvent, is configured to uniform spinning liquid；Spinning liquid being carried out electrostatic spinning, obtains nano-nylon thin film, the process conditions of electrostatic spinning are: voltage 5～50KV, receiving range 3～25cm, spinning liquid fltting speed 0.1～10mL/h, temperature 10～50 DEG C；
By such scheme, in described nano-nylon thin-film material, the average diameter of nylon fiber is 50-80nm.
By such scheme, the solvent in described step (1) is the one in formic acid, acetic acid, dichloromethane, or the mixing of any two or three solvent.
By such scheme, in described spinning liquid, the mass fraction of Nylon-type polymer is 3～40wt%.
By such scheme, described inorganic salts additive is NaCl, CaCl2, LiCl, KBr, NaNO3In one, or any two or three inorganic salt mixing.In spinning liquid, additive mass fraction is 0.1～5wt%.
By such scheme, described in have the smooth surface of fingerprint be glass plate or PET plate or steel plate etc..
By such scheme, the kind of described quantum dot is CdS, CdSe monokaryon quantum dot, CdSe/ZnS, CdSe/CdS/ZnS core-shell quanta dots, CdxZn1 – xS、CdSe/CdxZn1 – xS alloy quantum dot, X value is one or more in 0-1, and the surface ligand of quantum dot is: one or more in trioctylphosphine (TOPO), tri-n-octyl phosphine (TOP), tributylphosphine (TBP), 1-octadecylene (ODE), oleyl amine (Oleylamine), oleic acid (Oleic acid).
By such scheme, the solvent of dispersion quantum dot solution includes but not limited to hexane, dichloromethane, petroleum ether, heptane.
Beneficial effects of the present invention:
(1) present invention carries out electrostatic spinning by Nylon-type polymer is made spinning major ingredient, obtains the nano-nylon thin-film material that thickness fiber is staggered.Then as latent fingerprint carrying object, porosity and ultra-high surface area because of its molecular scale having, composition in fingerprint easily diffuses into inside thin film, introducing from there through Electrostatic Absorption (electret material) improves the carrying fingerprint object absorption to nanoparticle, enhances the sensitivity level of fingerprint recognition.Finally, press nano-nylon thin film by finger or nano-nylon is pressed lightly on pore-free surface (such as glass plate, steel plate, PET plate) on fingerprint, can be transferred on electrostatic spinning nano thin film, operating process is easy, it is not necessary to modify quantum dot further, also need not process through cyanoacrylate or other fluorometric reagents.
(2) short time can obtain the fingerprint of high fluorescent contrast and shows.
(3) can transfer to the latent fingerprint on other surfaces detect on thin film, widen its range of application.
(4) can clearly indicate and include fingerprint 3 level structure of sweat pore.
Accompanying drawing explanation
Fig. 1 is that the present invention adds inorganic salt to fiber morphology impact.A () is fiber morphology and diameter Distribution before adding.B () is for adding 1.5wt% fiber morphology and diameter Distribution.
Fig. 2 is that embodiments of the invention 1 nano-nylon thin film is dived fingerprint tertiary structure display figure, and right figure is the enlarged drawing of left figure boxed area.
Fig. 3 is that embodiments of the invention 1 nano-nylon thin film is dived finger scan Electronic Speculum.
Fig. 4 is that embodiments of the invention 2 nano-nylon thin film is dived fingerprint display effect.
Fig. 5 is that embodiments of the invention 3 nano-nylon thin film is dived fingerprint display effect.
Detailed description of the invention
These embodiments are merely to illustrate the present invention rather than limit the scope of the present invention.After having read the content that the present invention lectures, the present invention can be made various changes or modifications by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
Embodiment 1:
A kind of make high-resolution, the material of sensitive identification fingerprint, the CdSe/ZnS quantum dot that high temperature organic synthesis method including fingerprint carrying object nano-nylon thin film with for fluorescence developing identification fingerprint synthesizes, quantum dot surface part is tri-n-octyl phosphine (TOP) and oleic acid (Oleic acid), and CdSe/ZnS quantum dot is dispersed in chloroform formation chloroformic solution；
Described nano-nylon thin film is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered, and preparation method is as follows:
(1) nylon 6 and additive NaCl being added in solvent formic acid, magnetic agitation 12h obtains homogeneous spinning liquid.Wherein the mass fraction of nylon 6 is 9wt%, and the addition of inorganic salt is the 0.1wt% of solution gross mass.
(2) spinning liquid being carried out electrostatic spinning, the process conditions of electrostatic spinning are: voltage 8kV, receiving range 5cm, spinning liquid fltting speed 0.1mL/h, temperature 20 DEG C.Use high speed rotary-drum as receiving device.Obtain nano-nylon thin film.
The method identifying fingerprint:
With finger by fingerprint on above-mentioned nano-nylon thin film, thin film is immersed in the chloroformic solution of CdSe/ZnS quantum dot, core-shell quanta dots surface ligand is tri-n-octyl phosphine (TOP) and oleic acid (Oleic acid), and in immersion process, concussion is loaded with the nano-nylon thin film of fingerprint.Taking out thin film after 1min, deionized water is cleaned, is dried, be placed on darkroom, shoot into fingerprint image with 300～400nm ultraviolet excitations, and fingerprint manifestation is green.Bright ridge line and dull substrate can be told clearly from Fig. 2.Where it can be seen that 1 grade of (level 1) structure ridge line lines (ridge pattern), 2 grades of (level 2) structures are intersected (crossover), terminal (termination) and branch (bifurcation), the sweat pore (swear pore with diameter of 80 μm) of 3 grades of (level 3) diameter of movement about 80 μm.The display of fingerprint 3 level structure demonstrates the high sensitivity of the present invention.
The scanning electron microscope (SEM) photograph of the nano-nylon thin film after pressing fingerprint is shown in Fig. 3.Can be seen that fingerprint component remains in nano-nylon film surface and do not dissolves in organic solvent from Fig. 3 scanning electron microscope result.The protection fingerprint component that electrostatic spinning structure can be good is described.Quantum dot in solvent and the protein in fingerprint component, fatty ingredient generation lipophilic reaction bonded.
Embodiment 2:
A kind of make high-resolution, the material of sensitive identification fingerprint, the CdSe/CdS/ZnS quantum dot that high temperature organic synthesis method including fingerprint carrying object nano-nylon thin film with for fluorescence developing identification fingerprint synthesizes, quantum dot surface part is tributylphosphine (TBP) and oleyl amine (Oleylamine), and the dispersion of CdSe/CdS/ZnS quantum dot forms solution in hexane；
Described nano-nylon thin film is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered, and preparation method is as follows:
(1) nylon 11 and additive KBr being added in the mixed solvent that solvent formic acid/dichloromethane mass ratio is 1:1, magnetic agitation 12h obtains homogeneous spinning liquid.Wherein the mass fraction of nylon 11 is 18wt%, and the addition of inorganic salt is the 1.5wt% of solution gross mass.Before adding, fiber morphology and diameter Distribution are shown in Fig. 1 (a).Fiber morphology and the diameter Distribution of adding 1.5wt% additive are shown in Fig. 1 (b).Fig. 1 comparative illustration: the average diameter of fiber can be dropped to 50nm from 80nm by inorganic additives, and the distribution of sizes simultaneously making fiber is more uniform.
(2) spinning liquid being carried out electrostatic spinning, the process conditions of electrostatic spinning are: voltage 20kV, receiving range 12cm, spinning liquid fltting speed 2mL/h, temperature 30 DEG C.Use high speed rotary-drum as receiving device.Obtain nano-nylon thin film.
The method identifying fingerprint:
With finger by fingerprint on a glass, nano-nylon thin film is pressed lightly on the glass plate being loaded with fingerprint, subsequently thin film is immersed CdSe/CdS/ZnS quantum dot solution.Core-shell quanta dots surface ligand is tributylphosphine (TBP) and oleyl amine (Oleylamine), dissolves in hexane.Taking out thin film after 2min to dry, with ultra violet lamp, fingerprint manifestation is red.Result is shown in Fig. 4.
Embodiment 3:
A kind of make high-resolution, the material of sensitive identification fingerprint, the CdSe quantum dot that high temperature organic synthesis method including fingerprint carrying object nano-nylon thin film with for fluorescence developing identification fingerprint synthesizes, quantum dot surface part is tributylphosphine (TBP) and 1-octadecylene (ODE), and CdSe quantum dot dispersion forms solution in hexane；
Described nano-nylon thin film is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered, and preparation method is as follows:
(1) by nylon 56 and additive NaNO3Addition solvent formic acid/acetic acid quality is than the mixed solvent for 4:1, and magnetic agitation 12h obtains homogeneous spinning liquid.Wherein the mass fraction of nylon 56 is 30wt%, and the addition of inorganic salt is the 2.5wt% of solution gross mass.
(2) spinning liquid being carried out electrostatic spinning, the process conditions of electrostatic spinning are: voltage 30kV, receiving range 20cm, spinning liquid fltting speed 5mL/h, temperature 50 C.Use high speed rotary-drum as receiving device.Obtain nano-nylon thin film.
The method identifying fingerprint:
With finger by fingerprint on PET plate, nano-nylon thin film is pressed lightly on the PET plate being loaded with fingerprint, subsequently thin film is immersed CdSe quantum dot solution.Core-shell quanta dots surface ligand is tributylphosphine (TBP) and 1-octadecylene (ODE), is dissolved in dichloromethane.Taking out thin film after 5min to dry, with ultra violet lamp, fingerprint manifestation is yellow.Result is by Fig. 5.
Claims (10)
1. one kind makes high-resolution, the material of sensitive identification fingerprint, it is characterised in that: include fingerprint carrying object nano-nylon
Thin film and the quantum dot of the high temperature organic synthesis method synthesis for fluorescence developing identification fingerprint；Described nano-nylon thin film is with Buddhist nun
Dragon base polymer material is spinning major ingredient, the nano-nylon thin-film material that the thickness fiber that obtains through electrostatic spinning is staggered.
Making high-resolution the most according to claim 1, the material of sensitive identification fingerprint, it is characterised in that: described Buddhist nun
Dragon base polymer is nylon 6, nylon66 fiber, nylon 11, nylon 56, nylon 12, NYLON610, nylon 612, Stanyl (DSM).,
Nylon 1010, nylon 7, nylon 9, nylon 13, the one in nylon 9 T, or any two or three polymer
Mixture.
Making high-resolution the most according to claim 1, the material of sensitive identification fingerprint, it is characterised in that: described receives
The preparation method of rice nylon film: Nylon-type polymer material and inorganic salts additive are dissolved in a solvent, is configured to uniformly
Spinning liquid；Spinning liquid being carried out electrostatic spinning, obtains nano-nylon thin film, the process conditions of electrostatic spinning are: voltage 5～
50KV, receiving range 3～25cm, spinning liquid fltting speed 0.1～10mL/h, temperature 10～50 DEG C.
Making high-resolution the most according to claim 1, the material of sensitive identification fingerprint, it is characterised in that: described receives
In rice nylon film material, the average diameter of nylon fiber is 50-80nm.
Making high-resolution the most according to claim 3, the method for sensitive identification fingerprint, it is characterised in that: described solvent
For the one in formic acid, acetic acid, dichloromethane, or the mixing of any two or three solvent；Nylon-type in described spinning liquid
The mass fraction of polymer is 3～40wt%.
Making high-resolution the most according to claim 3, the method for sensitive identification fingerprint, it is characterised in that: described nothing
Machine additive salt is NaCl, CaCl2, LiCl, KBr, NaNO3In one, or any two or three inorganic
Salt mixes；In spinning liquid, additive mass fraction is 0.1～5wt%.
Making high-resolution the most according to claim 1, the material of sensitive identification fingerprint, it is characterised in that: described quantum
The kind of point is CdS, CdSe monokaryon quantum dot, CdSe/ZnS, CdSe/CdS/ZnS core-shell quanta dots, CdxZn1–xS、
CdSe/CdxZn1–xS alloy quantum dot, X value is one or more in 0-1, and the surface ligand of quantum dot is: three just
Octylphosphine oxide (TOPO), tri-n-octyl phosphine (TOP), tributylphosphine (TBP), 1-octadecylene (ODE), oleyl amine (Oleylamine),
One or more in oleic acid (Oleic acid).
Making high-resolution the most according to claim 1, the material of sensitive identification fingerprint, it is characterised in that: described use
The quantum dot synthesized in the high temperature organic synthesis method of fluorescence developing identification exists in the form of a solution, disperses the molten of quantum dot solution
Agent includes but not limited to hexane, dichloromethane, petroleum ether, heptane.
9. the method utilizing the material identification fingerprint of the making high-resolution described in claim 1, sensitive identification fingerprint, its feature
It is: comprise the following steps:
(1) use nano-nylon thin film to make fingerprint carrying object, finger is pressed lightly on fingerprint carrying object, or will
Fingerprint carrying object is pressed against the smooth surface of fingerprint and obtains carrying the nano-nylon thin film of latent fingerprint, described nano-nylon thin film
It is with Nylon-type polymer material for spinning major ingredient, the nano-nylon thin film material that the thickness fiber that obtains through electrostatic spinning is staggered
Material；
(2) the nano-nylon thin film carrying fingerprint that step (1) obtains is put into the amount of high temperature organic synthesis method synthesis
In the solution of son point, soaking 10s～5min under room temperature, in immersion process, concussion is loaded with the nano-nylon thin film of fingerprint；
(3) deionized water cleans the nano-nylon thin film being loaded with fingerprint, is placed on darkroom after drying, purple with 300～400nm
Outer light excites and shoots into fingerprint image.
Method the most according to claim 9, it is characterised in that have described in: the smooth surface of fingerprint be glass plate or
PET plate or steel plate.
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