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A material for making high-definition and sensitive identification fingerprints and a fingerprint identification method

A fingerprint, clear technology, applied in the fields of luminescent materials, chemical instruments and methods, rayon manufacturing, etc., can solve the problems of complex procedures, unsuitable porous surfaces, and evidences become chalky, etc., to achieve simple operation process, improve adsorption , the effect of high fluorescence contrast

Active Publication Date: 2019-01-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, after the surface treatment of the carrier with cyanoacrylate, the carrier is soaked in the organic phase synthesis of quantum dots, but the process is complicated, and the evidence will become chalky if the cyanoacrylate treatment time is too long
Also cyanoacrylate treatment is not suitable for porous surfaces

Method used

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  • A material for making high-definition and sensitive identification fingerprints and a fingerprint identification method
  • A material for making high-definition and sensitive identification fingerprints and a fingerprint identification method
  • A material for making high-definition and sensitive identification fingerprints and a fingerprint identification method

Examples

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Effect test

Embodiment 1

[0038] A material for high-definition and sensitive identification of fingerprints, including fingerprint-carrying object nano-nylon film and CdSe / ZnS quantum dots synthesized by high-temperature organic phase synthesis for fluorescent color recognition fingerprints. The ligand on the surface of quantum dots is tri-n-octyl Phosphine (TOP) and oleic acid (Oleic acid), CdSe / ZnS quantum dots are dispersed in chloroform to form a chloroform solution;

[0039] The nano-nylon film is a nano-nylon film material with nylon polymer material as the main spinning material, and the thick and thin fibers obtained by electrospinning are interlaced. The preparation method is as follows:

[0040] (1) Nylon 6 and additive NaCl were added to the solvent formic acid, and magnetically stirred for 12 hours to obtain a homogeneous spinning solution. Wherein the mass fraction of nylon 6 is 9wt%, and the addition amount of inorganic salt is 0.1wt% of the total mass of the solution.

[0041] (2) The ...

Embodiment 2

[0046] A material for high-definition and sensitive identification of fingerprints, including fingerprint-carrying object nanometer nylon film and CdSe / CdS / ZnS quantum dots synthesized by high-temperature organic phase synthesis for fluorescent color recognition fingerprints. The ligands on the surface of quantum dots are three Butylphosphine (TBP) and oleylamine (Oleylamine), CdSe / CdS / ZnS quantum dots are dispersed in hexane to form a solution;

[0047] The nano-nylon film is a nano-nylon film material with nylon polymer material as the main spinning material, and the thick and thin fibers obtained by electrospinning are interlaced. The preparation method is as follows:

[0048] (1) Nylon 11 and additive KBr were added to a mixed solvent with a solvent formic acid / dichloromethane mass ratio of 1:1, and magnetically stirred for 12 hours to obtain a homogeneous spinning solution. Wherein the mass fraction of nylon 11 is 18wt%, and the addition amount of inorganic salt is 1.5wt%...

Embodiment 3

[0053] A material for making high-definition and sensitive fingerprint identification, including fingerprint-carrying object nanometer nylon film and CdSe quantum dots synthesized by high-temperature organic phase synthesis method for fluorescent color recognition fingerprints, and the surface ligand of quantum dots is tributylphosphine ( TBP) and 1-octadecene (ODE), CdSe quantum dots are dispersed in hexane to form a solution;

[0054] The nano-nylon film is a nano-nylon film material with nylon polymer material as the main spinning material, and the thick and thin fibers obtained by electrospinning are interlaced. The preparation method is as follows:

[0055] (1) Nylon 56 and additive NaNO 3 A mixed solvent with a solvent formic acid / acetic acid mass ratio of 4:1 was added, and magnetically stirred for 12 hours to obtain a homogeneous spinning solution. Wherein the mass fraction of nylon 56 is 30wt%, and the addition amount of inorganic salt is 2.5wt% of the total mass of ...

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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 [0001] The invention belongs to the field of new materials, and in particular relates to a material for making high-definition and sensitive fingerprint identification and a fingerprint identification method. It can be applied to the fields of nanometer material analysis technology and fingerprint detection technology. Background technique [0002] Fingerprints are the bumps in the skin on the belly of the fingertips. The latent fingerprint refers to the finger folds and concave-convex patterns left on the object surface after the finger touches the object. These patterns cannot be recognized by the naked eye objectively, and need to undergo certain processing methods to show the original appearance, so they are called latent fingerprints. Due to the uniqueness and invariance of individual fingerprints, fingerprint identification will become the most attractive means of identification. Usually, after the fingerprint is printed, there are few substances lef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/88D01F1/10D01F6/90A61B5/1172D04H1/728D04H1/4334D01D5/00
CPCA61B5/1172C09K11/025C09K11/883D01D5/003D01D5/0069D01D5/0076D01F1/10D01F6/90D04H1/4334D04H1/728
Inventor 董丽杰兰嵩滢袁野琚艳云熊传溪张扬
Owner WUHAN UNIV OF TECH
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