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Potential of Sr4Al14O25: Eu2+,Dy3+ inorganic oxide-based nanophosphor in Latent fingermark detection

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Abstract

In this paper, the potential of the Sr4Al14O25: Eu2+,Dy3+ fluorescent nanophosphor is explored to visualize the latent fingermarks. The nanophosphor has been synthesized using self-propagating high temperature synthesis and shows intense luminescence and strong long after glow properties. These nano particles have been characterized for their particle size, crystalline phase, and photoluminescent properties. The calculated PL CIE co-ordinates (0.138, 0.359) correspond to the blue–green shade. Different porous, non-porous, as well as slightly non-smooth surfaces are taken and successfully tested for latent fingerprints development with the prepared Sr4Al14O25: Eu2+,Dy3+ fluorescent nanophosphor powder. Present nano powder is advantageous to use on luminescent or multicolored surfaces as it gives greater contrast and also eliminates the problem of background interferences with the friction ridges due to its strong long after glow property. The results are very good when latent fingerprints were developed on the currency notes with optical variable ink and highly fluorescent pattern areas.

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Acknowledgements

The corresponding author is thankful to BRNS, Department of Atomic Energy (DAE), BARC, Mumbai for providing funds for the study in the form of a Young Scientist Research project (DAE sanction no. 2011/20/37P/05/BRNS).

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Authors and Affiliations

  1. Institute of Forensic Science and Criminology, Panjab University, Chandigarh, 160 014, India

    Vishal Sharma & Amrita Das

  2. School of Physics, Shri Mata Vaishno Devi University, Katra, 182320, J&K, India

    Vinay Kumar

  3. Department of Physics, University of the Free State, P.O. Box 339, Bloemfontein, 9300, South Africa

    O. M. Ntwaeaborwa & H. C. Swart

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  1. Vishal Sharma
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  2. Amrita Das
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  4. O. M. Ntwaeaborwa
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  5. H. C. Swart
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Correspondence to Vishal Sharma.

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Sharma, V., Das, A., Kumar, V. et al. Potential of Sr4Al14O25: Eu2+,Dy3+ inorganic oxide-based nanophosphor in Latent fingermark detection. J Mater Sci 49, 2225–2234 (2014). https://doi.org/10.1007/s10853-013-7916-2

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  • DOI: https://doi.org/10.1007/s10853-013-7916-2

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