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A Fingerprint is one of the most common types of physical evidence found at crime scenes. It is basically a complex mixture
of natural secretions of the body from three types of glands: eccrine, apocrine, and sebaceous glands. It also contains
contaminations from the environment. The chemical compositions of the deposit are mostly water (99%) with minor amount
(up to 1%) of inorganic and organic compounds. There have been number of studies undertaken to develop materials used in
lifting fingerprints. In general, the impressions made by finger marks found at the crime scenes fall into three categories, such as
plastic (or impression), visible (patent) and latent prints; the latter require enhancement in order to be visualised and identified.
Since the 1990?s there has been significant development in the visualisation methods of latent fingerprints. This includes the
combination of optical, physical, and chemical methods. In spite of all of the current methods for detecting latent finger-marks,
there is a strong demand for new and more efficient reagents to visualise latent fingerprints.
In this study, we report the synthesis of novel fingerprint powders based on silica nanoparticles of various sizes with three
different surface functionalities. Functionalised nanoparticles have been applied to detect latent finger-mark deposited onto
different non-porous surfaces and the results have been compared with currently available commercial powders (K9 Scene of
Crime Equipment Limited).
Mohammad has worked in Forensic Department in Saudi Arabia police for more than ten years. He has completed his master degree in forensic
materials from Heriot-Watt University. Now, he is in his final year of PhD at the School of Forensic and Investigative Sciences, University of Central
Lancashire. He has attended 3 National conferences and 1 International conference in the area of Forensic Science.
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