You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 46, Issue 5 (September 2001)

    Latent Fingerprint Detection Using a Scanning Kelvin Microprobe

    (Received 19 July 2000; accepted 23 October 2000)

    CODEN: JFSOAD

      Format Pages Price  
    PDF 8 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    Electrochemical interactions between latent human fingerprints and metal surfaces in ambient air are investigated using a scanning Kelvin microprobe. Inorganic salts present in sweat deposited at fingerprint ridges locally depassivate the metal surface producing a Volta potential decrease of greater than 200 mV. Volta potential patterns may persist for months and prints may be visualized by potential mapping, even when overcoated with a polymer layer. Because the Volta potential differences are produced by involatile salts they persist when the organic components of the fingerprint residue have been volatilized by heating to 600°C.


    Author Information:

    Worsley, DA
    University of Wales Swansea, Singleton park, Swansea,

    Williams, G
    University of Wales Swansea, Singleton park, Swansea,

    Neil McMurray, H
    University of Wales Swansea, Singleton park, Swansea,


    Stock #: JFS15103J

    ISSN: 0022-1198

    DOI: 10.1520/JFS15103J

    ASTM International
    is a member of CrossRef.

    Author
    Title Latent Fingerprint Detection Using a Scanning Kelvin Microprobe
    Symposium , 0000-00-00
    Committee E30