Enhancing the visualization of latent fingerprints by aggregation induced emission of siloles

Abstract

Aggregation-induced emission was explored for the visual enhancement of latent fingerprints deposited on wet non-porous surfaces.

Rapid Visualization of Latent Fingerprints with Color‐Tunable Solid Fluorescent Carbon Dots

“…After developing, the LFPs ridge details could be readily visualized by N,S‐SFCD solution with a pH value of 9 (Figure S7, Supporting Information). In addition, from the structure of N,S‐SFCD in our work, the carbon chain served as the lipophilic block preferentially adhered to hydrophobic surface of sebaceous fingerprints, hence the binding of N,S‐SFCD and LFPs may be facilitated by both electrostatic and hydrophobic interaction …”

“…Level 2 describes the minutia points including core, bifurcation, delta, bridge, enclosure, termination, island, short ridge, and hook, and their random combinations endow the uniqueness and invariability of fingermark. In addition, level 3 refers to the shape, number, and location of sweat pores, and although they alone cannot be used to detect LFPs, they provide reference information for partial defect or blurry level 2 of LFPs . As shown in Figure , the level 1 detail (whorl ridge pattern) and more comprehensive details of level 2 could be easily recognized by naked eyes.…”

“…For example, photoluminescence CdS quantum dots were applied in LFPs detection in 2004 . More recently, many researches focused on the fluorescence methods to enhance the visualization of LFPs via the aggregation‐induced emission of organic fluorophores . We also developed a new method in our previous work, where the hydrophobic adsorption of nitric oxide on the grease parts of fingerprint was utilized and then the LFPs can be visualized by a fluorescence nitric oxide probe .…”

Advances in the development and component recognition of latent fingerprints

“…Yang et al [17] have demonstrated a novel method for the ultrafast recognition of LFPs on various surfaces by using commercial thermoplastic polyurethane resin and an electrospinning technique with a fluorescein release-induced response. Our group has reported an alternative fluorescent approach to enhance the visualization of LFPs, based on aggregation induced emission (AIE) [18,42]. Because the overall process is performed in solution and does not involve powder treatment, it is more user-friendly.…”

NIR luminescence for the detection of latent fingerprints based on ESIPT and AIE processes

“…To our delight, an elegant solution has been recently presented in two reports by Su's research group. 10,11 They first proposed a novel use of the aggregation induced emission (AIE) effect of the dyes, such as tetraphenylethene (TPE), 1,1,2,3,4,5hexaphenylsilole (HPS) and 1-methyl-1-(4-carboxystyrene)-2,3,4,5tetraphenylsilole (MCSTPS) for the visualization enhancement of LFPs on wet non-porous surfaces (Fig 1). Practically, the wet chemistry treatment on one hand may protect policemen from the harmful effects of dust.…”