Application of photoluminescent PAMAM dendrimer in fingerprint detection

The application of photoluminescent PAMAM dendrimer as a fluorescent marker in oily-riched fingerprint detection on tinfoil, transparent adhesive tape in different condition (such as generation of dendrimers, concentration, treating time, wave of exciting light, etc) was studied in detail. The results show: the fluorescent material exhibited strong visible blue fluorescence under excitation at 365 nm in the dark, and PAMAM dendrimer was a good marker for fingerprint residue targeting, with weaker background development and better contrast between fingerprints and the substrate, and also it is easy to operate without any pollution, which indicates that it is an effective reagent for latent fingerprints detection on non-porous surfaces. Last, the contrast between fingerprints and the substrate was calculated by computer, which shows that the contrast of fingerprints is over 90% when developed by PAMAM dendrimer solutions.