Preparation of fluorescer for visualizing latent fingermark on viscous surface of adhesive tape

A fluorescent agent and sticky surface technology, which is applied in the field of fluorescent agent preparation, can solve the problem of lack of display effect of nano-type and non-nano-type display reagents, clarity of lines and details, poor selective combination with fingerprint residues, etc. problems, to achieve the effect of being suitable for mass production, improving sensitivity and accuracy, and being easy to popularize
CN101440285AInactive Publication Date: 2009-05-27CHINESE PEOPLE'S PUBLIC SECURITY UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
CHINESE PEOPLE'S PUBLIC SECURITY UNIVERSITY
Publication Date
2009-05-27
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention relates to a method for preparing a fluorescer for showing potential fingerprint through the viscous side of adhesive tap and belongs to the field of fingerprint identification technology. The method comprises the following steps: distilled water, sodium sulfite and selenium powder are added to a first vessel and is deoxidized and is heated and reflows in a water bath to obtain a seleno sodium sulfite aqueous solution; after deionized water is added to a second vessel for deoxidization, cadmium chloride and a sulfhydryl compound are added to the vessel; the PH value of the mixture is regulated; the seleno sodium sulfite aqueous solution is added to the vessel and reflows in boiling water to obtain a cadmium selenide nanocrystal solution; after the deionized water is added to a third vessel for deoxidization, the cadmium chloride and the sulfhydryl compound are added to the vessel; the PH value of the mixture is regulated; and the obtained solution is added to the cadmium selenide nanocrystal solution, is dripped with an equimolar sodium sulfide aqueous solution and reflow in boiling water to obtain the fluorescer. The method has a simple process and available materials; and the fluorescer has perfect showing efficiency, sensitivity, accuracy and repeatability and wide application prospect.
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Description

technical field

[0001] The invention belongs to the technical field of fingerprint identification, and in particular relates to a method for preparing a fluorescent agent for displaying potential fingerprints on adhesive tape adhesive surfaces. The nano fluorescent material prepared by the method has strong selective binding ability to potential fingerprint residues and High fluorescence performance. Background technique

[0002] Mudra is the skin pattern of human hands, including mastoid pattern (fingerprint, knuckle pattern and palm pattern), flexor folds, wrinkles and scars on the palm surface. Fingerprints can be regarded as the first evidence, which is of great significance and role in providing investigation direction and finally designating criminal suspects. At present, in many crime scenes (such as kidnapping, explosion, etc.), tapes carrying fingerprint information are left behind, so exploring new simple, efficient, accurate and safe display methods has become an...

Claims

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