The Scanning Kelvin Probe (SKP) for the visualisation of fingerprints on metal surfaces
The work to be presented will focus on the potentiometric imaging of fingerprints on metal surfaces using scanning Kelvin probe (SKP) technology 1,2. The method allows the user to visualise fingerprints directly in the form of two or three dimensional digital images without using a developer or making contact with the surface.
The technique works by taking potential measurements from a scanning vibrating gold probe. The surface potential can change with surface contaminants or due to interactions between the surface contaminant and the substrate e.g. corrosion. Fingerprint deposits affect the surface potential of the metal substrate and hence they can be visualised. The instrument is currently designed for small exhibits including bullet cartridge cases.
The basic operation of the SKP will be described complete with advantages and disadvantages of the method.
Mr Hefin Dafydd143422@swansea.ac.uk; Dr Geraint Williams (supervisor) firstname.lastname@example.org). Swansea University
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