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Novel organic-inorganic hybrid powder SrGaO:Mn-ethyl cellulose for efficient latent fingerprint recognition: Via time-gated fluorescence

RSC Advances, ISSN: 2046-2069, Vol: 10, Issue: 14, Page: 8233-8243
2020
  • 17
    Citations
  • 0
    Usage
  • 15
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    17
    • Citation Indexes
      17
  • Captures
    15

Article Description

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, SrGaO:Mn (SGO:Mn), 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 SGO:Mn-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.

Bibliographic Details

Lai, Jun'an; Long, Zhangwen; Qiu, Jianbei; Zhou, Dacheng; Wang, Qi; Yang, Yong; Hu, Songhan; Wang, Zhe; Zhang, Ke

Royal Society of Chemistry (RSC)

Chemistry; Chemical Engineering

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