A Method for Visualizing Fingerprints Using Fluorescent Magnetic Noble Metal Nanocluster Core-Shell Microspheres

A core-shell microsphere, gold nanocluster technology, applied in chemical instruments and methods, applications, luminescent materials, etc., can solve the problems of quantum dots and rare earth elements toxicity and radiation-limited applications, and achieve fast, efficient, and efficient fingerprint display operations. Conducive to inspection and identification, the effect of high yield

Active Publication Date: 2020-03-06
SOUTHWEST UNIVERSITY OF POLITICAL SCIENCE AND LAW
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the toxicity and radiation of quantum dots and rare earth elements limit their application to a certain extent.

Method used

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  • A Method for Visualizing Fingerprints Using Fluorescent Magnetic Noble Metal Nanocluster Core-Shell Microspheres
  • A Method for Visualizing Fingerprints Using Fluorescent Magnetic Noble Metal Nanocluster Core-Shell Microspheres
  • A Method for Visualizing Fingerprints Using Fluorescent Magnetic Noble Metal Nanocluster Core-Shell Microspheres

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with examples, and this example is only used for concrete illustration, and is not limited to the practical scope of the present invention

[0036]S1. Preparation of fluorescent magnetic noble metal nanocluster core-shell microparticles using ferrous sulfate, ferric chloride, chloroauric acid, silver nitrate, chloroplatinic acid, ascorbic acid, glutathione, ammonia water, sodium hydroxide and polyethyleneimine Balls, the fluorescent magnetic noble metal nanocluster core-shell microspheres include fluorescent magnetic gold nanocluster core-shell microspheres, fluorescent magnetic silver nanocluster core-shell microspheres and fluorescent magnetic platinum nanocluster core-shell microspheres, i.e. gold nanocluster display reagents, Silver nanocluster visualization reagent and platinum nanocluster visualization reagent;

[0037] S2. Simulate the scene of the case, and volunteers make fingerprint samples; ...

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Abstract

A method for displaying fingerprints by fluorescent magnetism precious metal nano-cluster nuclear shell microspheres is characterized in that fluorescent magnetism precious metal nano-clusters directly incubate gold, silver or platinum nano-clusters on the surfaces of magnetism ferroferric oxide nano particles modified by polymine to form gold, silver or platinum nano-cluster nuclear shell microspheres, that is gold, silver or platinum nano-cluster display reagents. The method for displaying the fingerprints by the fluorescent magnetism precious metal nano-cluster nuclear shell microspheres has the beneficial technical effects that the fluorescent magnetism precious metal nano-cluster nuclear shell microspheres are high in fluorescence quantum yield, long in fluorescence duration and low in toxicity; fingerprint display operation is fast and efficient, and 30-day-old fingerprints can be clearly displayed; performance of displaying old fingerprints of the prepared fluorescent magnetism precious metal nano-cluster nuclear shell microspheres are better than performance of traditional display reagents; and a constructed display observation system can highly fix fingerprint information, and is beneficial to inspection and identification, and the like.

Description

technical field [0001] The invention relates to the field of identification of public security criminal technology fingerprints, in particular to a method for displaying fingerprints by using fluorescent magnetic nano-cluster core-shell microspheres. Background technique [0002] Fingerprints are different from person to person, remain unchanged throughout life, and leave traces on objects they touch. They have the reputation of "human identity card" and "king of evidence", and they play a role that cannot be ignored in exposing, proving crimes and identifying criminals. There are sweat pores distributed on the mastoid pattern of the fingers of the human hands, and the sweat secreted by the sweat pores often contains oil and other tiny substances. Therefore, the sweat latent fingerprint components left on the object contain a small amount of water, a small amount of inorganic substances, proteins, oils and other organic substances. [0003] Fingerprint display technology ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/58C09K11/87A61B5/1172
CPCA61B5/1172C09K11/025C09K11/58C09K11/87
Inventor 黄锐易旻陈虹宇刘睿
Owner SOUTHWEST UNIVERSITY OF POLITICAL SCIENCE AND LAW
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