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Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS

Time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been shown to enhance fingermark recovery compared to standard processes used by police forces, but there is no data to show how generally applicable the improvement is. Additionally, ToF-SIMS can be run in either positive or negative ion...

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Autores principales: Charlton, Deborah, Costa, Catia, Hinder, Steven J., Watts, John F., Bailey, Melanie J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10419545/
https://www.ncbi.nlm.nih.gov/pubmed/37570657
http://dx.doi.org/10.3390/molecules28155687
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author Charlton, Deborah
Costa, Catia
Hinder, Steven J.
Watts, John F.
Bailey, Melanie J.
author_facet Charlton, Deborah
Costa, Catia
Hinder, Steven J.
Watts, John F.
Bailey, Melanie J.
author_sort Charlton, Deborah
collection PubMed
description Time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been shown to enhance fingermark recovery compared to standard processes used by police forces, but there is no data to show how generally applicable the improvement is. Additionally, ToF-SIMS can be run in either positive or negative ion mode (or both), and there is no data on which mode of operation is most effective at revealing fingerprints. This study aims to fill these gaps by using ToF-SIMS to image fingerprints deposited on two common exhibit-type surfaces (polyethylene and stainless steel) using 10 donors and ageing fingerprints in either ambient, rainwater, or underground for 1 and 5 months. In all, 120 fingerprints were imaged using ToF-SIMS, and each was run in positive and negative modes. A fingerprint expert compared the fingerprint ridge detail produced by the standard process to the ToF-SIMS images. In over 50% of the samples, ToF-SIMS was shown to improve fingerprint ridge detail visualised by the respective standard process for all surfaces tested. In over 90% of the samples, the ridge detail produced by ToF-SIMS was equivalent to standard development across all different ageing and exposure conditions. The data shows that there is a benefit to running the ToF-SIMS in both positive and negative modes, even if no ridge detail was seen in one mode.
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spelling pubmed-104195452023-08-12 Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS Charlton, Deborah Costa, Catia Hinder, Steven J. Watts, John F. Bailey, Melanie J. Molecules Article Time-of-flight secondary ion mass spectrometry (ToF-SIMS) has been shown to enhance fingermark recovery compared to standard processes used by police forces, but there is no data to show how generally applicable the improvement is. Additionally, ToF-SIMS can be run in either positive or negative ion mode (or both), and there is no data on which mode of operation is most effective at revealing fingerprints. This study aims to fill these gaps by using ToF-SIMS to image fingerprints deposited on two common exhibit-type surfaces (polyethylene and stainless steel) using 10 donors and ageing fingerprints in either ambient, rainwater, or underground for 1 and 5 months. In all, 120 fingerprints were imaged using ToF-SIMS, and each was run in positive and negative modes. A fingerprint expert compared the fingerprint ridge detail produced by the standard process to the ToF-SIMS images. In over 50% of the samples, ToF-SIMS was shown to improve fingerprint ridge detail visualised by the respective standard process for all surfaces tested. In over 90% of the samples, the ridge detail produced by ToF-SIMS was equivalent to standard development across all different ageing and exposure conditions. The data shows that there is a benefit to running the ToF-SIMS in both positive and negative modes, even if no ridge detail was seen in one mode. MDPI 2023-07-27 /pmc/articles/PMC10419545/ /pubmed/37570657 http://dx.doi.org/10.3390/molecules28155687 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Charlton, Deborah
Costa, Catia
Hinder, Steven J.
Watts, John F.
Bailey, Melanie J.
Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title_full Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title_fullStr Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title_full_unstemmed Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title_short Expanding the Efficacy of Fingermark Enhancement Using ToF-SIMS
title_sort expanding the efficacy of fingermark enhancement using tof-sims
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10419545/
https://www.ncbi.nlm.nih.gov/pubmed/37570657
http://dx.doi.org/10.3390/molecules28155687
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