Application of polyamide-amine (PAMAM) dendrimer coated ZnX semiconductor quantum dots in fingerprint development

A technology of dendrimers and semiconductors, which is applied in application, human identification, diagnostic recording/measurement, etc., can solve the problems of staff and environmental damage, and achieve the effect of simple display process, high display efficiency, and simple preparation process

Inactive Publication Date: 2012-10-03
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] But Cd 2+ The ions are heavy metal ions, which will cause certain harm to the staff and the enviro...

Method used

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  • Application of polyamide-amine (PAMAM) dendrimer coated ZnX semiconductor quantum dots in fingerprint development
  • Application of polyamide-amine (PAMAM) dendrimer coated ZnX semiconductor quantum dots in fingerprint development
  • Application of polyamide-amine (PAMAM) dendrimer coated ZnX semiconductor quantum dots in fingerprint development

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Embodiment 1

[0038] An application of ZnS semiconductor quantum dots coated with polyamide-amine dendrimers in fingerprint display. PAMAM dendrimers are used to coat ZnS semiconductor quantum dots. The end groups of PAMAM dendrimers are amine groups, and the algebra is 5.0; The steps are:

[0039] 1) Synthesis of ZnS semiconductor quantum dot solution coated with PAMAM dendrimers;

[0040] i) To 100mL the concentration is 1×10 -5 mol L -1 , PAMAM dendrimer methanol solution with a pH of 7.0, adding 0.25mL concentration of 0.1mol L -1 zinc chloride solution, and then complexed at 25°C for 7h to obtain Zn 2+ Complexation solution of ions and PAMAM dendrimers, Zn during its complexation process 2+ The complex solution of ions and PAMAM dendrimers was characterized by UV-Vis absorption spectroscopy, and the results are as follows figure 1 as shown, figure 2 for figure 1 Partial enlarged view of the mid-absorption wavelength range of 260nm to 300nm; figure 1 and figure 2 It can be se...

Embodiment 2

[0051] 1) Synthesis of ZnS semiconductor quantum dot solution coated with PAMAM dendrimers;

[0052] i) To 100mL the concentration is 1×10 -5 mol L -1 , PAMAM dendrimer methanol solution with a pH of 7.0, adding 0.25mL concentration of 0.1mol L -1 zinc chloride solution, and then complexed at 25°C for 7h to obtain Zn 2+ A complex solution of ions and PAMAM dendrimers;

[0053] ii) Add 0.25 mL of 0.1 mol L to the complex solution obtained in step i). -1 Sodium sulfide solution, then stirred and reacted at 25°C for 10 minutes, and dialyzed in methanol with a dialysis bag with a molecular weight cut-off of 3500 to obtain a ZnS semiconductor quantum dot solution coated with PAMAM dendrimers;

[0054] 2) At 25°C, the concentration of 0.375mL was 0.1mol L -1 The zinc chloride solution is added to the ZnX semiconductor quantum dot solution coated with PAMAM dendrimers obtained in step 1), the ZnX semiconductor quantum dots are modified and doped, and stirred for 10 min to obtain...

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Abstract

The invention relates to application of polyamide-amine (PAMAM) dendrimer coated ZnX (X=S, Se, Te) semiconductor quantum dots in fingerprint development, belonging to the technical field of material preparation. The method comprises the following steps: synthesizing a PAMAM dendrimer coated ZnX semiconductor quantum dot solution; and carrying out fluorescence labeling on latent fingerprints by using the PAMAM dendrimer coated ZnX semiconductor quantum dot solution. The method provided by the invention avoids the problem of toxicity of heavy metal ion Cd<2+> in the existing developing reagent, and the PAMAM dendrimer coated ZnX semiconductor quantum dots are harmless to the environment and users; the addition of the metal ion M<2+> can further enhance the fluorescence-emission strength of the ZnX semiconductor quantum dots; and by using the interaction between the PAMAM dendrimer and the fingerprint residue, the invention reserves the high development efficiency in the physical development method, and overcomes the defect of insufficient detailed development of fingerprint lines in the physical development method, thereby enhancing the precision and accuracy of the latent fingerprint development.

Description

technical field [0001] The invention relates to the application of ZnX (X=S, Se, Te) semiconductor quantum dots coated with polyamide-amine (PAMAM) dendrimers in fingerprint display, belonging to the technical field of material preparation, and the polyamide prepared by the method ZnX semiconductor quantum dots coated with amide-amine dendrimers have targeting and fluorescence display effects on latent fingerprint residues. Background technique [0002] Fingerprints, also known as fingerprints, can be divided into broad and narrow senses. Fingerprints in a broad sense include finger prints, knuckle prints and palm prints. Fingerprints in a narrow sense refer to the surface pattern of the inner finger ball at the end of a human finger. It begins to grow in the third to fourth months of human embryonic development and is fully formed in the sixth month. [0003] Each person's fingerprint is a unique symbol, which varies from person to person and from finger to finger, and is...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/56C09K11/88A61B5/117A61B5/1172
Inventor 靳玉娟段晓博唐晓旭耶律媛含
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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