Improvement in fingerprint detection using Tb(III)-dipicolinic acid complex doped nanobeads and time resolved imaging

Nanoparticles used for fingermark detection—A comprehensive review

“…Sebaceous-rich fingermarks were used and it was claimed that the 700 nm NPs gave the best ridge detail compared to those with 250 or 550 nm diameters, although no images of the fingermarks were included in the manuscript. Hauser et al synthesized SiO 2 NPs by doping with 2,6-dipicolinic acid (DPA) and terbium ([Tb(DPA) 3 ] 3− ) and functionalized it with phenyl groups (Hauser, Knupp, & Officer, 2015). It was observed that, on fresh fingermarks, the functionalization of the NPs reduced the luminescence but gave better adhesion to the fingermark and less background compared to nonfunctionalized NPs.…”

Emerging fields in fingermark (meta)detection – a critical review

“…-Silicon oxide NPs represent an ideal template for researchers given their extended functionalization and dyedoping capabilities. Silica NPs can be used to detect ngermarks, 31,[108][109][110][111][112][113][114]134 to try understanding the interaction mechanisms, 34,35 or as signal carriers/enhancers for the analytical characterization of secretion residues. 118,119,[121][122][123] -The success of cadmium-based QDs is mainly due to their optical properties, characterized by an intense luminescence.…”

Fingermark visualisation with iron oxide powder suspension: The variable effectiveness of iron (II/III) oxide powders, and Tween® 20 as an alternative to Triton™ X-100

“…An example SEM image highlighting the range of particle sizes on a fingermark developed with Fisher Scientific iron oxide (I/1100/53) powder suspension is shown in Figure 1. Other iron oxide particle parameters such as surface texture, coating and agglomeration behaviour have not been studied in relation to the efficacy of iron oxide powder suspension (C-IOPS-09 or A C C E P T E D M A N U S C R I P T similar formulations), but have been shown to be important in other micro-sized powder, and powder suspension formulations [11,12].…”