Styryl Dye Coated Metal Oxide Powders for the Detection of Latent Fingermarks on Non-Porous surfaces

Scott Chadwick, Phillip Maynard, Christopher Lennard, Andrew McDonagh, Xanthe Spindler, Claude Roux

    Research output: Contribution to journalArticle

    13 Citations (Scopus)

    Abstract

    Conventional fingermark powders rely on contrast induced by absorption/reflection (e.g. black powder) or luminescence in the visible region (e.g. Blitz Green®). In most cases, these powders provide sufficient contrast; however, in some circumstances surface characteristics can interfere with the visualisation of powdered fingermarks. Visualisation in the near infra-red (NIR) region, however, has been shown to eliminate interferences commonly encountered in the visible region. In this study, a mixture of rhodamine 6G and the NIR laser dye styryl 11 (STaR 11) was coated onto an aluminium oxide nanopowder and then mixed with silver magnetic powder to develop and visualise fingermarks in the NIR. When compared to Blitz Green®, it was determined that the STaR 11 magnetic powder was better suited for marks deposited on textured surfaces and for older marks, whereas Blitz Green® performed better on smooth glossy surfaces. The ability of the STaR 11 mixed dye formulation to be visualised in both the visible and NIR regions also provides a significant advantage over conventional luminescent fingermark powders
    Original languageEnglish
    Pages (from-to)208-214
    Number of pages7
    JournalForensic Science International
    Volume219
    Issue number1-3
    DOIs
    Publication statusPublished - 2012

    Fingerprint

    Powders
    Oxides
    Coloring Agents
    Metals
    Dye Lasers
    Aluminum Oxide
    Luminescence
    Silver

    Cite this

    Chadwick, Scott ; Maynard, Phillip ; Lennard, Christopher ; McDonagh, Andrew ; Spindler, Xanthe ; Roux, Claude. / Styryl Dye Coated Metal Oxide Powders for the Detection of Latent Fingermarks on Non-Porous surfaces. In: Forensic Science International. 2012 ; Vol. 219, No. 1-3. pp. 208-214.
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    title = "Styryl Dye Coated Metal Oxide Powders for the Detection of Latent Fingermarks on Non-Porous surfaces",
    abstract = "Conventional fingermark powders rely on contrast induced by absorption/reflection (e.g. black powder) or luminescence in the visible region (e.g. Blitz Green{\circledR}). In most cases, these powders provide sufficient contrast; however, in some circumstances surface characteristics can interfere with the visualisation of powdered fingermarks. Visualisation in the near infra-red (NIR) region, however, has been shown to eliminate interferences commonly encountered in the visible region. In this study, a mixture of rhodamine 6G and the NIR laser dye styryl 11 (STaR 11) was coated onto an aluminium oxide nanopowder and then mixed with silver magnetic powder to develop and visualise fingermarks in the NIR. When compared to Blitz Green{\circledR}, it was determined that the STaR 11 magnetic powder was better suited for marks deposited on textured surfaces and for older marks, whereas Blitz Green{\circledR} performed better on smooth glossy surfaces. The ability of the STaR 11 mixed dye formulation to be visualised in both the visible and NIR regions also provides a significant advantage over conventional luminescent fingermark powders",
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    author = "Scott Chadwick and Phillip Maynard and Christopher Lennard and Andrew McDonagh and Xanthe Spindler and Claude Roux",
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    Styryl Dye Coated Metal Oxide Powders for the Detection of Latent Fingermarks on Non-Porous surfaces. / Chadwick, Scott; Maynard, Phillip; Lennard, Christopher; McDonagh, Andrew; Spindler, Xanthe; Roux, Claude.

    In: Forensic Science International, Vol. 219, No. 1-3, 2012, p. 208-214.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Styryl Dye Coated Metal Oxide Powders for the Detection of Latent Fingermarks on Non-Porous surfaces

    AU - Chadwick, Scott

    AU - Maynard, Phillip

    AU - Lennard, Christopher

    AU - McDonagh, Andrew

    AU - Spindler, Xanthe

    AU - Roux, Claude

    PY - 2012

    Y1 - 2012

    N2 - Conventional fingermark powders rely on contrast induced by absorption/reflection (e.g. black powder) or luminescence in the visible region (e.g. Blitz Green®). In most cases, these powders provide sufficient contrast; however, in some circumstances surface characteristics can interfere with the visualisation of powdered fingermarks. Visualisation in the near infra-red (NIR) region, however, has been shown to eliminate interferences commonly encountered in the visible region. In this study, a mixture of rhodamine 6G and the NIR laser dye styryl 11 (STaR 11) was coated onto an aluminium oxide nanopowder and then mixed with silver magnetic powder to develop and visualise fingermarks in the NIR. When compared to Blitz Green®, it was determined that the STaR 11 magnetic powder was better suited for marks deposited on textured surfaces and for older marks, whereas Blitz Green® performed better on smooth glossy surfaces. The ability of the STaR 11 mixed dye formulation to be visualised in both the visible and NIR regions also provides a significant advantage over conventional luminescent fingermark powders

    AB - Conventional fingermark powders rely on contrast induced by absorption/reflection (e.g. black powder) or luminescence in the visible region (e.g. Blitz Green®). In most cases, these powders provide sufficient contrast; however, in some circumstances surface characteristics can interfere with the visualisation of powdered fingermarks. Visualisation in the near infra-red (NIR) region, however, has been shown to eliminate interferences commonly encountered in the visible region. In this study, a mixture of rhodamine 6G and the NIR laser dye styryl 11 (STaR 11) was coated onto an aluminium oxide nanopowder and then mixed with silver magnetic powder to develop and visualise fingermarks in the NIR. When compared to Blitz Green®, it was determined that the STaR 11 magnetic powder was better suited for marks deposited on textured surfaces and for older marks, whereas Blitz Green® performed better on smooth glossy surfaces. The ability of the STaR 11 mixed dye formulation to be visualised in both the visible and NIR regions also provides a significant advantage over conventional luminescent fingermark powders

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    KW - Fingerprint Detection

    KW - Styryl Dyes

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    M3 - Article

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