Single-metal deposition (SMD) as a latent fingermark enhancement technique: An alternative to multimetal deposition (MMD)

Stauffer, Éric; Bécue, Andy; Singh, Kanwar Vikas; Thampi, K. Ravindranathan; Champod, Christophe; Margot, Pierre

doi:10.1016/j.forsciint.2006.12.009

Cited by 92 publications

(70 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gold colloids deposited on fingerprints serve as catalysts for the precipitation of metallic gold from the gold/reducing agent solution, thus increasing the size of the gold colloids. The sensitivity and selectivity of SMD procedure are on par with those obtained using MMD [35].…”

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 90%

“…The physical developer solution contains silver ions, and in the presence of a reducing agent, the ions are reduced to silver metal on gold nucleating sites. MMD is used for visualizing latent fingerprints on a range of porous and non-porous surfaces [32][33][34][35][36][37][38][39].…”

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 99%

“…The improvement of the multi-metal deposition was achieved by obtaining luminescent fingerprints with very good contrast and details. This method comprises a great step forward since it increases the sensitivity of detection on black surfaces and eliminates the background color, which was one of the main disadvantages of the MMD or SMD techniques [34,35].…”

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 99%

See 2 more Smart Citations

Gold is going forensic

Mohamed

2011

Gold Bull

View full text Add to dashboard Cite

Not long ago, forensic science was mainly focused on fingerprint detection. With the advance in science and technology, forensics has become an increasingly interesting scientific field to explore, and gold is playing an increasingly important role in this area. Gold compounds and gold nanoparticles contribute to fingerprint detection and illicit drug testing. Fingerprints can be detected on diverse suspected articles after being covered with gold followed by another metal such as zinc utilizing vacuum metal deposition technique. An important advantage of using gold in forensic science has been the long-term storage of developed fingerprints due to its inert nature in addition to the high selectivity and the sensitivity of gold nanoparticles. Gold also forms microcrystals with cocaine and heroin of identifiable morphology.

show abstract

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 90%

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 99%

Section: Multi-metal Deposition Single-metal Deposition and Single-mentioning

confidence: 99%

See 1 more Smart Citation

Gold is going forensic

Mohamed

2011

Gold Bull

View full text Add to dashboard Cite

show abstract

“…The modified method produced dark blue impressions and also reduced the number of operational steps. Subsequently, Stauffer et al (Stauffer et al, 2007) replaced the silver staining step by gold nanoparticles. This not only eliminated one of the reagents, but also made the technique cost-effective.…”

Section: Introductionmentioning

confidence: 99%

Multimetal deposition method for detection of latent fingerprints: a review

Sodhi

Kaur

2017

Egypt J Forensic Sci

View full text Add to dashboard Cite

Multimetal deposition is a versatile technique of detecting latent fingerprints on porous items, for example, fabric tape, masking tape, cardboard; on semi-porous items, for example, expanded polystyrene, latex gloves, waxed paper; as well as on non-porous items, for example, metals and plastics. It is so named because it is a two-step process, the first involves deposition of gold and the second deposition of silver on the ridges, thereby visualizing the latent impressions. Although a technique with a very wide range of applications, multimetal deposition is not very popular since the process of detecting fingerprints is quite cumbersome. In its modified form, called multimetal deposition II, some of the demerits of the original method are overcome. Multimetal deposition III and IV endeavor to further improve the performance of this technique. Yet another modification of the original multimetal deposition version is the fluorescent multimetal deposition -a technique which produces a better contrast of the ridges vis-à-vis the background.

show abstract

“…However, it was found that the Fe 3 O 4 @Ag nanoeggs aggregated immediately with an increase of pH from 7.5 to 9.0 (Fig. 5(d), (e) 24 The technique relies on the mechanical adherence of powders to the moisture and/or oily components of the skin ridge deposits,…”

mentioning

confidence: 99%

Synthesis of Composite Particles with Fe₃O₄core and Ag Shell for the Development of Fingerprints

Zhang¹,

Chu²

2013

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

The Fe 3 O 4 -core and Ag-shell (Fe 3 O 4 @Ag nanoeggs) were prepared through the encapsulation of 3-aminopropyltriethoxysilane-coated magnetite nanoparticle in nano-Ag shell by a simple chemically controlled procedure. The Fe 3 O 4 @Ag nanoeggs were characterized by scanning electron microscopy, transmission electron microscopy, UV-vis spectrum and superconducting quantum interference device magnetometer, respectively. A detailed analysis is provided of how the hydrolysis and condensation of 3-aminopropyltriethoxysilane and the pH value are vital in fabricating the Fe 3 O 4 @Ag nanoeggs. The prepared Fe 3 O 4 @Ag nanoeggs possessed uniform size, improved monodispersity, stability against aggregation and high magnetization, which were utilized for the detection of latent fingerprints deposited onto different surfaces. The experimental results showed that the latent fingerprints developed with the Fe 3 O 4 @Ag nanoeggs powders exhibited excellent ridge details with minimal background staining.

show abstract

Single-metal deposition (SMD) as a latent fingermark enhancement technique: An alternative to multimetal deposition (MMD)

Cited by 92 publications

References 6 publications

Gold is going forensic

Gold is going forensic

Multimetal deposition method for detection of latent fingerprints: a review

Synthesis of Composite Particles with Fe₃O₄core and Ag Shell for the Development of Fingerprints

Contact Info

Product

Resources

About

Single-metal deposition (SMD) as a latent fingermark enhancement technique: An alternative to multimetal deposition (MMD)

Cited by 92 publications

References 6 publications

Gold is going forensic

Gold is going forensic

Multimetal deposition method for detection of latent fingerprints: a review

Synthesis of Composite Particles with Fe3O4core and Ag Shell for the Development of Fingerprints

Contact Info

Product

Resources

About

Synthesis of Composite Particles with Fe₃O₄core and Ag Shell for the Development of Fingerprints