Research Progress of Fingerprint Development by Carbon Dot Composite Powder Method
Fingerprints play an extremely important role in criminal investigation and forensic identification.Carbon dots have a broad application in the field of fingerprint development,due to their excellent fluorescence properties,stable chemical properties and low cost.In this paper,we demonstrated the fluorescence mechanism of carbon dots fingerprint development technology and analyzed two coping strategies to improve the aggregation quenching effect of solid carbon dots powder.Compared with changing the structure of carbon dots or surface modification methods,it is more convenient and stable to disperse carbon dots into matrix materials.We described the application of carbon dots-inorganic salts/inorganic oxides,carbon dots-polymers and organic compounds in the field of fingerprint development.The application of the three types of carbon dots composite powders was explored in the field of fingerprint development.We compared and analyzed the three types of solid carbon dots powder in the application of fingerprint development application of the object,the distribution of carbon dots,the fluorescence intensity and stability,the effect of the colour development,the cost of preparation and other aspects of the differences.We pointed out that carbon dots fingerprint development technology research needs to be further optimized,with a aim to providing reference for the application of subsequent carbon dots to the field of the fingerprint development technology of the powder method.
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