Preparation of solid fluorescent carbon dots and application thereof in aspect of latent fingerprint detection

A solid-state fluorescence and latent fingerprint technology, which is applied in applications, luminescent materials, diagnostic recording/measurement, etc., can solve the problems of poor resolution of fluorescent fingerprints, enlarged nanoparticle size, cumbersome preparation process, etc., and achieve excellent solid-state fluorescence The properties and preparation method are simple and fast, and the raw materials are safe and easy to obtain
CN106929014AActive Publication Date: 2017-07-07JIANGNAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGNAN UNIV
Publication Date
2017-07-07

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Abstract

The invention discloses preparation of solid fluorescent carbon dots and application thereof in an aspect of latent fingerprint detection, belongs to the technical fields of material synthesis and fingerprint detection. The solid fluorescent carbon dots are synthesized by adopting glutathione as a nitrogen / sulfur source and adopting citric acid as a carbon source by virtue of a microwave method. Raw materials are safe and easy to obtain, a preparation method is simple and rapid, and particles are safe and nontoxic. The surfaces of the solid fluorescent carbon dots (SFCDs) provided by the invention contain an amino, a sulfydryl and a carboxyl functional group, a particle size is 2 to 7 nm, and the solid fluorescence property is excellent. The SFCDs are used as a fingerprint developing agent and can develop the aged fingerprint, and the developing time can reach 30 days in an experimental range; and the solid fluorescent carbon dots can be applied to a liquid spray method and powder method, the two methods are complementary to each other, and the universality of the developing agent is improved.
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Description

technical field

[0001] The invention relates to the preparation of a solid-state fluorescent carbon point and its application in latent fingerprint detection, and belongs to the technical field of material synthesis and fingerprint detection. Background technique

[0002] Due to its uniqueness and lifetime invariance, fingerprint is one of the most reliable evidences for personal identification and is widely used in the field of criminal search. Therefore, chemical or physical processing of latent fingerprints to make them visualized is a key step in crime scene evidence collection. Traditional fingerprint detection is often limited to a certain special object. In addition, due to the lack of effective fingerprint quality of aged fingerprints, the detection effect will also be affected. Therefore, it is very important to use a general-purpose fingerprint developer to detect various surface and aging fingerprints. The safety of fingerprint developer that damages the health ...

Claims

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