Novel organic-inorganic hybrid powder SrGa12O19:Mn2+-ethyl cellulose for efficient latent fingerprint recognition via time-gated fluorescence.
RSC Adv
; 10(14): 8233-8243, 2020 Feb 24.
Article
em En
| MEDLINE
| ID: mdl-35497857
ABSTRACT
Latent fingerprints (LFPs) are important evidence in crime scenes and forensic investigations, but they are invisible to the naked eye. In this work, a novel fluorescent probe was developed by integrating a narrow-band-emitting green afterglow phosphor, SrGa12O19Mn2+ (SGOMn), and ethyl cellulose (EC) for the efficient visualization of LFPs. The hydrophobic interactions between the powder and lipid-rich LFPs made the ridge structures more defined and easily identifiable. The background fluorescence of the substrates was completely avoided because of the time-gated fluorescence of the afterglow phosphor. All the three levels of LFP degrees were clearly imaged due to the high sensitivity. Moreover, the SGOMn-EC powder was highly stable in neutral, acidic, and alkaline environments. In addition, 60 day-aged LFPs were successfully visualized by the powder. All performances showed that this strategy for LFP recognition has merits such as low cost, non-destructive nature, reliability, superior universality, and legible details. Together, these results show the great application prospects of this powder in forensic identification and criminal investigation.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
RSC Adv
Ano de publicação:
2020
Tipo de documento:
Article