Potential applications of scanning probe microscopy

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Potential Applications of Scanning Probe Microscopy in Forensic Science

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IOP Publishing doi:10.1088/1742-6596/61/1/247

Journal of Physics: Conference Series 61 (2007) 1251–1255 International Conference on Nanoscience and Technology (ICN&T 2006)

Potential Applications of Scanning Probe Microscopy in Forensic Science
G S Watson1 and J A Watson
Nanoscale Science and Technology Centre, School of Science, Griffith University, Kessels Rd, Nathan, QLD, 4111 Australia E-mail: [e-mail]
Abstract. The forensic community utilises a myriad of techniques to investigate a wide range of materials, from paint flakes to DNA. The various microscopic techniques have provided some of the greatest contributions, e.g., FT-IR (Fourier-transform infrared) microspectroscopy utilised in copy toner discrimination, multi-layer automobile paint fragment examination, etc, SEM-EDA (scanning electron microscopy with energy dispersive analysis) used to investigate glass fragments, fibers, and explosives, and SEM in microsampling for elemental analysis, just to name a few. This study demonstrates the ability of the Scanning Probe Microscope (SPM) to analyse human fingerprints on surfaces utilising a step-and-scan feature, enabling analysis of a larger field-of-view. We also extend a line crossings study by incorporating height analysis and surface roughness measurements. The study demonstrates the potential for SPM techniques to be utilised for forensic analysis which could complement the more traditional methodologies used in such investigations.

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