Application of Nanomaterials into Developing Latent Fingerprint
Latent fingerprints are of the most important physical evidence in forensic identification though most of them are invisible,requiring physical or chemical treatments to enhance their visualization.To date,various of methods have been exploited for latent fingerprints to enhance their visualization.However,with the update of criminal methods,the traditional methods of developing latent fingerprints are limited.Among them,the physical developing methods are not sensitive enough to the latent fingerprint on the surface of complex object,and during the developing operation,some powders or toxic substances are easy to float in the air,which destroy the health of the experimenters.The chemical developing methods also have the disadvantages including cumbersome operation,high cost,toxicity and impact on DNA detecting.As specialized materials,nanomaterials have been widely used in medical equipment,electronic equipment and coatings.In the field of latent fingerprint development,nanomaterials have also attracted extensive attention from researchers because of their good adsorption,non-floatability in the air,wide applicability and less impact on DNA detecting.The research progresses home and abroad has been comprehensively reviewed in this article about various nanomaterials in latent fingerprints development.These nanomaterials mainly in latent fingerprints development cover metal nanomaterials,non-metallic nanomaterials,metal oxide nanomaterials and the other nanomaterials,including the mechanism,synthesis methods and adaptability.In addition,the future trends of nanomaterials in the development of latent fingerprints were suggested,in order to further promote the practical application of nanomaterials to develop latent fingerprints.
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