Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation of noble metal nanocluster visualization reagent and method for visualization of latent sweat fingerprints

A nano-cluster, precious metal technology, applied in metal processing equipment, chemical instruments and methods, sensors, etc., can solve the problems of low synthesis efficiency, short fluorescence duration, and long time-consuming of gold nano-clusters

Inactive Publication Date: 2018-03-27
SOUTHWEST UNIVERSITY OF POLITICAL SCIENCE AND LAW
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of the above two studies used traditional incubation and heating methods in the preparation process, which took a long time (12h-72h), cumbersome operation, did not have the advantages of green and high efficiency, and the synthesis efficiency was low, and they did not explore the old effect.
[0007] It can be seen from the above that in the existing fingerprint display technology, traditional fluorescent materials have disadvantages such as high production cost, high toxicity, short fluorescence duration, and inability to display old fingerprints; gold nanoclusters have long time-consuming (12h-72h), Complicated operation, low synthesis efficiency, etc.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation of noble metal nanocluster visualization reagent and method for visualization of latent sweat fingerprints
  • Preparation of noble metal nanocluster visualization reagent and method for visualization of latent sweat fingerprints
  • Preparation of noble metal nanocluster visualization reagent and method for visualization of latent sweat fingerprints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] A preparation method of a precious metal nano-cluster visualization reagent of the present invention comprises the following steps: dissolving 1% chloroauric acid in pure water to form a 0.01 mol / L solution; dissolving bovine serum albumin in pure Water was prepared as a 50 mg / mL solution; potassium hydroxide was dissolved in pure water to form a 1 mol / L solution; the above prepared chloroauric acid solution and bovine serum albumin solution were mixed at a volume ratio of 1:1, placed in React under a magnetic stirrer for 3 minutes; use an infusion needle to slowly add potassium hydroxide solution dropwise to the mixed solution of chloroauric acid solution and bovine serum albumin solution described in this step, and adjust the pH to 12. At this time, the 0.01mol / The volume ratio of 1 L of chloroauric acid solution, 50 mg / mL bovine serum albumin solution, and 1 mol / L potassium hydroxide solution is 10:10:1; the mixed solution with a pH of 12 is first placed in an ultras...

Embodiment 2

[0100] A preparation method of a precious metal nano-cluster visualization reagent of the present invention comprises the following steps: dissolving 1% silver nitrate in pure water to form a 0.01 mol / L solution; dissolving bovine serum albumin in pure water at 37°C Prepare a solution; dissolve potassium hydroxide in pure water to form a 1 mol / L solution; mix the silver nitrate solution and bovine serum albumin solution prepared above at a volume ratio of 1:1, and place them under a magnetic stirrer for 3 minutes Slowly drip potassium hydroxide solution into the mixed solution of silver nitrate solution and bovine serum albumin solution described in this step with an infusion needle, adjust the pH to be 12, the silver nitrate solution of 0.01 mol / L used at this moment, 50 The volume ratio of mg / mL bovine serum albumin solution and 1 mol / L potassium hydroxide solution is 10:10:1; put the mixed solution with pH 12 in an ultrasonic washing machine for 1 hour; then put it in a hous...

Embodiment 3

[0102] A preparation method of a precious metal nano-cluster visualization reagent of the present invention comprises the following steps: dissolving 1% chloroauric acid in pure water to form a 0.01 mol / L solution; dissolving 1% silver nitrate in pure water to form a 0.01 mol / L solution; mol / L solution; dissolving bovine serum albumin in pure water at 37°C to form a solution; dissolving potassium hydroxide in pure water to form a 1 mol / L solution; Silver nitrate solution and bovine serum albumin solution were mixed at a volume ratio of 1:1:2, and placed under a magnetic stirrer to react for 3 minutes; the potassium hydroxide solution was slowly added dropwise to the above mixed solution with an infusion needle, and the pH was adjusted to 12, The chloroauric acid solution of 0.01 mol / L used at this moment, the silver nitrate solution of 0.01 mol / L, the bovine serum albumin solution of 50 mg / mL, the potassium hydroxide solution volume ratio of 1 mol / L are 5:5: 10:1; the mixed so...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention proposes a preparation of a precious metal nano-cluster display reagent and a method for displaying sweat latent fingerprints. In the present invention, the noble metal nanoclusters are any one of gold nanoclusters, silver nanoclusters, gold-silver alloy nanoclusters and platinum noble metal nanoclusters; and the noble metal nanocluster visualization reagent is prepared by an ultrasonic-microwave synergistic preparation method. The method for displaying old sweat latent fingerprints includes six steps of preparation of reagents, pressing fingerprints, revealing fingerprints by dripping, washing away floating colors, drying fingerprints and observing and fixing fingerprints. The invention covers the preparation of four metal nanocluster display reagents and the method for displaying old fingerprints. The prepared gold, silver, gold-silver alloy, and platinum fluorescent noble metal nanoclusters have a high fluorescence quantum yield, a long duration of fluorescence, and low toxicity. ;Fingerprint display operation is fast and efficient, and can clearly display 30-day-old fingerprints, and the effect is better than that of traditional display reagents.

Description

technical field [0001] The invention belongs to the field of public security criminal technical fingerprint identification, and in particular relates to the preparation of a precious metal nano-cluster display reagent and a method for displaying sweat latent fingerprints. Background technique [0002] As a new type of luminescent material, noble metal nanoclusters refer to clusters with a particle size of about 2nm composed of several to dozens of noble metal atoms, which have relatively stable fluorescence properties, high biocompatibility, and low toxicity. Advantages: In the past decade, the fluorescent properties of noble metal nanoclusters have been mainly used in the detection of metal ions by fluorescent probes, fluorescence imaging of live cells, and fluorescent sensors. However, there are few literature reports on the research and application in the field of criminal science and technology, and it is still in its infancy. [0003] Fingerprints are different from pe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/58C09K11/87A61B5/1172B22F9/24B22F1/00
CPCA61B5/1172C09K11/58C09K11/87B22F9/24B22F1/054
Inventor 黄锐陈虹宇
Owner SOUTHWEST UNIVERSITY OF POLITICAL SCIENCE AND LAW