Paper characteristics and their influence on the ability of single metal deposition to detect fingermarks

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Sous embargo jusqu'au 15/11/2020.
State: Public
Version: author
License: Not specified
Serval ID
serval:BIB_33E8F64ABE8C
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Paper characteristics and their influence on the ability of single metal deposition to detect fingermarks
Journal
Forensic Chemistry
Author(s)
Acherar Ouahiba, Truong Minh Quang, Robert Sylvain, Crispino Frank, Moret Sébastien, Bécue Andy
ISSN
2468-1709
Publication state
Published
Issued date
03/2019
Peer-reviewed
Oui
Volume
12
Pages
8-24
Language
english
Abstract
This study aims at exploring the way paper samples may impact the performance of Single-Metal Deposition (SMD II), a fingermark detection technique known for its versatility of application as well as its sensitivity regarding porous substrates. To get a broader view on how porous substrates may impact the SMD II performances, 74 North American and European papers types were collected, characterized (UV-visible and infrared spectroscopy, roughness, porosity, and surface pH), and processed as substrates bearing fingermarks. This part of the study represented a first valuable outcome by the number of samples considered. After processing with SMD II, the samples were characterized again with the techniques mentioned above, background staining and fingermark quality were assessed and associated with a quality score. Overall, no positive nor negative trend was observed between the paper characteristics and the SMD II performance. As a consequence, it is currently still not possible to predict if a paper sample will behave well or bad with SMD II. Of all the monitored parameters, the chemical composition of the surface coating (i.e., silica or calcium carbonate) may be worth exploring further, as it has been observed that some coatings undergo partial degradation during the SMD II process. As a result, secretion residue may be damaged by the chemical solubilization of the support layer if they failed to penetrate deeper into the substrate.
Keywords
Forensic science, Chemical analysis, Porous substrate, Surface properties, Gold nanoparticles
Web of science
Create date
22/02/2019 15:33
Last modification date
20/08/2019 14:20
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