A novel chitosan/tripolyphosphate/L‐lysine conjugates for latent fingerprints detection and enhancement

Abstract

Fingerprints are one of the most present and valuable pieces of physical evidence in forensic science and can often, to some extent, be found at the crime scene. These marks, a series of ridges and furrows and their random combinations on the finger surface [1,2], are assumed to be unique for every person, pointing out that there are no two people on Earth that have identical fingerprints [3]. There are three distinct types of fingerprint: patent, plastic, and latent, that could be recovered from the crime scene [4,5]. On the other hand, latent fingerprints are impressions secreted on a surface and are usually imperceptible [6-8]. Identification of these latent fingerprints is one of the most important tasks for law enforcement agencies in order to identify persons suspected of having committed a crime [3]. Fingerprint detection and analysis for individual identification has undergone tremendous changes since its introduction to the investigation of crimes in 1892 [9,10]. Many approaches are used for their visualization, but two main and routinely employed are

Interpol review of fingermarks and other body impressions (2019 – 2022)

“…Preliminary/Pilot studies – Several compounds were presented as new dusting powders: AIE-active composites or molecules [ [277] , [278] , [279] , [280] , [281] ], algal biomass [ 282 ], anti-perovskite phosphors [ 283 ], azo-dyes [ 284 ], β-cyclodextrin-berberine complexes [ 285 ], benzazole derivatives [ 286 ], bisamide analogues [ 287 ], cadmium-doped silica microspheres [ 288 ], chitosan-tripolyphosphate-lysine conjugates [ 289 ], coumarin–pyridone conjugates [ 290 ], crushed eggshells and clamshells [ 291 ], crushed gambir [ 292 ], curcumin analogues [ 293 ], doped montmorillonite [ 278 , 294 , 295 ], doped starch microspheres [ [296] , [297] , [298] ], europium-dextrose composites [ 299 ], iron oxide/zinc sulphide hybrid [ 300 ], metal-organic frameworks [ 301 ], organic NIR emitters [ 302 , 303 ], perylenetetracarboxylate compounds [ 304 ], phenylthiazoles [ 305 ], phosphor-cellulose hybrids [ 306 ], pyrazoles [ 307 ], pyrene-tagged imidazolium salts [ 308 ], pyridine and pyrimidine derivatives [ 309 , 310 ], rare-earth-doped phosphors [ [311] , [312] , [313] , [314] , [315] , [316] , [317] , [318] , [319] ], reduced graphene oxides [ 320 ], resveratrol powder [ 321 ], rhodamine B-doped diatomaceous earth [ 322 ], Schiff base complexes [ [323] , [324] , [325] ], talcum powder […”

Dansyl fluorophore functionalized hierarchically structured mesoporous silica nanoparticles as novel latent fingerprint development agents

“…36 More recently, forensic application of chitosan modied microparticles has exploited their polycationic nature and ability to bind to ngerprint lipid residues by both electrostatic and lipophilic interactions. 37,38 Hejjaji et al 37 have prepared chitosan microparticles modied with tripolyphosphate for visualization of latent ngerprints and Vučković et al 38 improved the ngerprint development process by adding L-lysine to the system. However, there are few studies employing chitosan for detection and enhancement of latent ngerprints and, to the best of our knowledge, no reports of the use of hierarchically structured MSNs modied with chitosan (MSN@Ch) for such applications the strategy here.…”

Novel Organic-Inorganic Hybrid Polystyrene Nanoparticles with Trichromatic Luminescence for the Detection of Latent Fingerprints

“…A variety of efforts to develop rapid, sensitive, and economical techniques for the detection of latent fingerprints have emerged in the past few years [1]. To date, these techniques including powder dusting [7][8][9][10][11], fluorescent dye staining [12,13], ninhydrin spraying [14], cyanoacrylate/ iodine fuming [1,15], vacuum metal deposition, and small particle reagent method [16][17][18][19][20] are the most widely used due to their simplicity, efficiency, and ease of operation. Although these traditional methods are effective under ordinary circumstances, there are still numerous challenges to visualize latent fingerprints with high contrast and low background interference on multicolor background, and there is an urgent need in seeking simple and efficient methods for developing the latent fingerprints with improved contrast, sensitivity, and selectivity.…”