Photoluminescence Spectroscopy for Estimating the Age of The Latent Fingerprints: A New Potential Approach
Keywords:
Photoluminescence Spectrometry, UV-Vis Spectrometry, latent fingerprints, forensic sciences, life sciences, Age estimation, Dactylography, SpectrofluorimetryAbstract
This study examined variations in spectral absorption and emission intensity of latent fingerprints over time, employing UV-Vis spectroscopy and photoluminescence spectroscopy. There was noticeable absorption at 296nm on the samples, and the fluorescence emission intensity showed variations. A total of 1600 samples from various categories were analyzed to validate this hypothesis. The emission intensity observed under photoluminescence spectroscopy varied over time, showing greater intensities in controlled female and male samples compared to the uncontrolled samples that were exposed to environmental conditions. The emission intensity of the controlled female (CF) sample was the highest at 6341168 CPS, followed by the controlled male (CM) sample at 1270240 CPS. On the other hand, the uncontrolled female (UF) sample exhibited an emission intensity of 5431940 CPS, while the uncontrolled male (UM) sample had an intensity of 100764 CPS. This emission intensity variation proved to be an efficient age profiling marker for the latent fingerprints.
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