Use of quantum dots in aqueous solution to detect blood fingermarks on non-porous surfaces.

Détails

Ressource 1Télécharger: Bécue2009__Use of quantum dots in aqueous solution.pdf (301.02 [Ko])
Etat: Public
Version: Author's accepted manuscript
ID Serval
serval:BIB_30D0AF99785F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Use of quantum dots in aqueous solution to detect blood fingermarks on non-porous surfaces.
Périodique
Forensic Science International
Auteur(s)
Bécue A., Moret S., Champod C., Margot P.
ISSN
1872-6283 (Electronic)
ISSN-L
0379-0738
Statut éditorial
Publié
Date de publication
10/2009
Peer-reviewed
Oui
Volume
191
Numéro
1-3
Pages
36-41
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov't
Résumé
A new and original reagent based on the use of highly fluorescent cadmium telluride (CdTe) quantum dots (QDs) in aqueous solution is proposed to detect weak fingermarks in blood on non-porous surfaces. To assess the efficiency of this approach, comparisons were performed with one of the most efficient blood reagents on non-porous surfaces, Acid Yellow 7 (AY7). To this end, four non-porous surfaces were studied, i.e. glass, transparent polypropylene, black polyethylene, and aluminium foil. To evaluate the sensitivity of both reagents, sets of depleted fingermarks were prepared, using the same finger, initially soaked with blood, which was then successively applied on the same surface without recharging it with blood or latent secretions. The successive marks were then cut in halves and the halves treated separately with each reagent. The results showed that QDs were equally efficient to AY7 on glass, polyethylene and polypropylene surfaces, and were superior to AY7 on aluminium. The use of QDs in new, sensitive and highly efficient latent and blood mark detection techniques appears highly promising. Health and safety issues related to the use of cadmium are also discussed. It is suggested that applying QDs in aqueous solution (and not as a dry dusting powder) considerably lowers the toxicity risks.
Mots-clé
Aluminum, Blood, Cadmium Compounds/chemistry, Chromogenic Compounds/chemistry, Dermatoglyphics, Glass, Humans, Luminescence, Polypropylenes, Porosity, Quantum Dots, Surface Properties, Tellurium/chemistry, Water/chemistry
Pubmed
Open Access
Oui
Création de la notice
08/10/2009 12:52
Dernière modification de la notice
20/08/2019 13:15
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