An AIE based fluorescent probe for digital lifting of latent fingerprint marks down to minutiae level

Interpol review of fingermarks and other body impressions 2016–2019

“…It has to be noted that the technique appears similar to VMD (e.g., colour tones, degradation with time of ridge details with silver) and is further combined with chemical imaging (fatty acids mapping). self-triggered alarm system using a triboelectric nanosensor and nitrocellulose membrane as substrate for fingermarks upon contact [ 533 ]; sulfonated poly (diphenylacetylene) polymer in solution interacting with sweat components and exhibiting a “turn-on” emission mode [ 534 ]; PDMS support covered by a PDA thin film then applied on a fingermark: transfer of PDA into sweat and ridge pattern visualization through PDA-catalysed electroless silver deposition (positive image on the substrate, negative image on the PDMS support) [ 535 ]; follow-up of the above study: PDMS support covered by a PDA thin film and a silver layer then applied on a fingermark to allow optical detection and Raman chemical imaging [ 473 ]; CTF-developed fingermarks combined with transmission-/reflection-mode multiwavelength digital holography [ 536 ]; use of an AIE-based tetraphenylethene-based dye [ 537 ], conjugated polyelectrolyte [ 538 ], diphenylpyrimidinone derivatives [ 539 ] or acridinediones [ 540 ] to detect sebum-rich marks on various substrates; p-C1-PDPA film taking advantage of swelling-induced emission enhancement to detect sebum-rich marks on non-porous substrates [ 541 ]; two-step detection of sebum-rich fingermarks involving the lifting of secretion residue by a hydrophilic cellulose membrane followed by dye staining of the membrane (the sebum-rich secretions acting as a mask) [ 542 ] (note: this study has been further reported by Ref. [ 543 ]); use of paraffin candle soot to detect sebum-rich fingermarks on various substrates [ 544 ]; two-step detection of sebum-rich fingermarks involving the lipophilic adsorption of nitric oxide (NO) followed by the application of 1,2-diaminoanthraquinone [ 545 ]; sublimation of lanthanide complexes to detect fingermarks on non-porous substrates [ 546 ]; use of lysozyme-binding aptamers combined with a lanthanide-based carboxymethyl nanocellulose hydrogel [ 547 ] or embedded in two DNA strands with a G-quadruplex/NMM complex [ 548 ] to detect (fresh sebum-rich) fingermarks on various substrates; use of electrolytes in aqueous solutions to detect marks on various substrates [ 549 ]; two-step detection of fingermarks involving the transfer of secretion residue to a nanofibrillated cellulose membrane doped with fluorescen...…”

“…use of an AIE-based tetraphenylethene-based dye [ 537 ], conjugated polyelectrolyte [ 538 ], diphenylpyrimidinone derivatives [ 539 ] or acridinediones [ 540 ] to detect sebum-rich marks on various substrates;…”

Ultrasensitive detection of aqueous Cu2+ ions by a coumarin-salicylidene based AIEgen

“…This is because at higher water fractions ( f w 4 80%) probe 3 possibly forms larger molecular aggregates and precipitates quickly, resulting in a decrease in emission intensity, which is a characteristic phenomenon often observed with AIEgens. [42][43][44][45][46] Besides, dynamic light scattering (DLS) studies of probe 3 in different water fractions in DMSO ( f w 60%, 80% and 99.5%) also showed a decrease in the average particle size (Z av ) on addition of higher water volumes (Z av at f w 60% = 801 nm; at f w 80% = 372 nm and at f w 99.5% = 175 nm), indicating the formation of larger aggregates that precipitate out from the solution phase ( Fig. S5, ESI †).…”

Recent Trends in Fluorescent Organic Materials for Latent Fingerprint Imaging

“…The matrix used by fluorescent organic small molecules for LFP imaging acts as a carrier, bioaffinity improver, and fluorescence developer (Barros et al, 2017 ; Brunelle et al, 2017 ; Zhang et al, 2017 ; Alsolmy et al, 2018 ; Uppal et al, 2018 ; Duan et al, 2019 ). On the other hand, aggregation-induced emission (AIE) exhibits remarkable bright fluorescence in aggregate or solid state (Mei et al, 2015 ; Zhao et al, 2017 ; Chen et al, 2018 ), and AIE-active molecules solely have been used for LFP bioimaging with high contrast and short developing time (Li et al, 2012 ; Xu et al, 2014 ; Suresh et al, 2018 ).…”

“…AIE-active diphenylpyrimidinone derivative DPPS-1 (Singh et al, 2016 ) and DPSA (Singh et al, 2018 ) with excited-state intramolecular proton transfer (ESIPT) mechanisms in the H 2 O/CH 3 CN mixture showed successful applications in visualization of LFPs with the first-level and second-level details on non-porous metal substrates. Acridinediones (ADDPh and ADDSi) with AIE feature were reported to develop LFPs down to the second-level details on different non-porous substrates by a portable wet method in the THF/water mixture for a 2-min enhancement (Suresh et al, 2018 ). A novel imidazole derivative (IMD FTs) was designed to imaging LFPs with the third-level details (sweat pores) on various porous/semi-porous/non-porous surfaces under a 365-nm UV light (Ravindra et al, 2019 ).…”