Desenvolvimento de revelador magneto-fluorescente para impressões digitais latentes

Abstract

Forensic sciences employ scientific knowledge and various techniques to uncover not only crimes but also various legal matters. Papilloscopy, in particular, uses toxic and expensive materials for revealing latent fingerprints (LFPs). This work aims to develop a revealer that is biodegradable, non-toxic, and cost-effective, becoming an interesting alternative to current options in the forensic field. For this purpose, oat husk, curcumin, and magnetic material with superparamagnetic properties were utilized. The developed revealer was analyzed using techniques such as Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), and Fluorescence Microscopy (FM). The selected surfaces were porous (raw wood) and non-porous (glass and aluminum), which were applied with LFPs ranging from zero to three hundred and sixty-five days old. The results showed that the revealer developed from oat husk, magnetic material, and curcumin exhibited good adhesion and consequently yielded positive results in fingerprint development. Thus, environmental benefits are achieved through the removal of industrial waste that would otherwise be discarded and the use of non-toxic materials for humans.