Visualization of Latent Fingermarks by Nanotechnology: Reversed Development on Paper—A Remedy to the Variation in Sweat Composition

Jaber, Nimer; Leśniewski, Adam; Gabizon, Hadar; Shenawi, Sanaa; Mandler, Daniel; Almog, Joseph

doi:10.1002/anie.201205259

Cited by 77 publications

(39 citation statements)

References 21 publications

(5 reference statements)

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“…Owing to the presence of sweat components (fatty acids, amino acids, inorganic salts and so on), these patterns are transferred to solid substrates when fingers touch the surface. Analyses of the fingerprint patterns left on solid surfaces have been unarguably one of the most convincing tools for the proof of an individual’s presence at a specific location and, as a result, a variety of techniques3940414243444546 have been developed for imaging and comparing these patterns.…”

Section: Resultsmentioning

confidence: 99%

Hydrochromic conjugated polymers for human sweat pore mapping

et al. 2014

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Hydrochromic materials have been actively investigated in the context of humidity sensing and measuring water contents in organic solvents. Here we report a sensor system that undergoes a brilliant blue-to-red colour transition as well as ‘Turn-On’ fluorescence upon exposure to water. Introduction of a hygroscopic element into a supramolecularly assembled polydiacetylene results in a hydrochromic conjugated polymer that is rapidly responsive (<20 μs), spin-coatable and inkjet-compatible. Importantly, the hydrochromic sensor is found to be suitable for mapping human sweat pores. The exceedingly small quantities (sub-nanolitre) of water secreted from sweat pores are sufficient to promote an instantaneous colorimetric transition of the polymer. As a result, the sensor can be used to construct a precise map of active sweat pores on fingertips. The sensor technology, developed in this study, has the potential of serving as new method for fingerprint analysis and for the clinical diagnosis of malfunctioning sweat pores.

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Section: Resultsmentioning

confidence: 99%

Hydrochromic conjugated polymers for human sweat pore mapping

et al. 2014

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“…Recently, an inverse process was developed, which involves the coating of the substrate instead of the fingermark by the use of surface modified AuNPs in the first step [23] [24].…”

Section: Co-localization Of M/z-markersmentioning

confidence: 99%

Mass Spectrometric Imaging of Gold Nanolayer Coated Latent Fingermarks: Deciphering Overlapping Features by Statistical Analysis

Elsner¹,

Abel²

2016

ACES

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Overlapping latent fingermarks constitute a serious challenge to database related recognition and matching algorithms in biometry, forensic and crime scene investigations. Mass spectrometry imaging (MSI) is a powerful tool for deciphering and analyzing overlapping fingermarks based on the individual chemical information of each deposit. Fingermark MSI in practice still requires a subjective judgment of an MSI expert, such that rapid analysis, automation, standardization, and a quantitative evaluation of the complete detection and separation process of overlapped fingermarks from MSI data sets is the ultimate goal and will be necessary to become an accepted process in criminal investigations and law enforcement. Here we investigated the feasibility and efficiency of different statistical approaches for the separation of overlapped latent fingermarks based on MSI data. Entropy analysis of generated m/z-images was used to evaluate the results obtained from the statistical analysis.Furthermore, we demonstrate and discuss the opportunity to reconstitute and separate overlapping fingermarks by discrete scanning at selected x,y-positions defined from a previous image analysis using a more simple schema based on visible and therefore optical distinguishable overlapped ink-based fingermarks. The overlapped latent fingermarks were developed by rapid gold sputter coating and analyzed by laser based MSI, without (organic) matrix preparation. Latent finger marks can be transferred from the substrate/surface with and conserved on a soft gold sputtered soft membrane at low temperatures.

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“…For example, current developed processes display inconsistent results amongst various protocols, even for the same type of nanoparticles. 3 The precise underlying mechanisms involved in the interaction between the AuNPs (or any other nanoparticles) and the fingerprint residue is yet to be elucidated, most likely due to the complex composition of the fingerprint residue. 8 Thus far, the mechanism was broadly assumed to be a simple ionic interaction between the negatively charged citrate stabilized AuNPs and the positively charged amino acids of the fingerprint residue at low pH.…”

Section: Introductionmentioning

confidence: 99%

“…1b, 3,4 In particular, the versatility of surface modification of nanoparticles has been exploited, allowing precise targeting of various components present in fingerprint residues. 3,4 In terms of increasing sensitivity, a process that employs metastable silver colloid solution, silver physical developer (Ag-PD), 1b,5 has been used as a post-treatment enhancement of gold nanoparticle (AuNP) treated fingerprint deposits on paper substrates, which is a form of multi-metal deposition (MMD). 1b,1d, 6 Another common development method is single-metal deposition (SMD), 1b,1d,7 in which the enhancement of AuNP treated fingerprint residues occurs via reinforcement with gold colloids in aqueous solution rather than with silver.…”

Section: Introductionmentioning

confidence: 99%

Fine-tuning latent fingerprint detection on paper using 1,2-indanedione bi-functional reagents

Lee

Joullié

2015

Tetrahedron

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a b s t r a c tIn order to address the need for consistency and generality in chemical methods developed for detection of latent fingerprints on paper substrates, a practical protocol was developed using 1,2-indanedionebased bi-functional reagents. A series of novel bi-functional reagents were designed and synthesized using a concise, five-step sequence. An optimized development condition that is tailored to the type of paper substrate that requires processing was discovered, allowing potential application in practical criminal work where evidence processing is an irreversible process. The study also provided an insight to the underlying mechanism of interaction between the bi-functional reagent and fingerprint residue.

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Visualization of Latent Fingermarks by Nanotechnology: Reversed Development on Paper—A Remedy to the Variation in Sweat Composition

Cited by 77 publications

References 21 publications

Hydrochromic conjugated polymers for human sweat pore mapping

Hydrochromic conjugated polymers for human sweat pore mapping

Mass Spectrometric Imaging of Gold Nanolayer Coated Latent Fingermarks: Deciphering Overlapping Features by Statistical Analysis

Fine-tuning latent fingerprint detection on paper using 1,2-indanedione bi-functional reagents

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