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Effective fingerprint recognition technique using doped yttrium aluminate nano phosphor material
G P Darshan1, H B Premkumar2, H Nagabhushana3
1Department of Physics, Acharya Institute of Graduate Studies, Bangalore 560 107, India; Research and Development Center, Bharathiar University, Coimbatore 641046, India.
Journal of Colloid and Interface Science
|December 1, 2015
Summary
Yttrium aluminate nanoparticles synthesized via green combustion enhance fingerprint detection. This eco-friendly method offers a sensitive, low-cost alternative to traditional luminescent powders for forensic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Forensic Science
Background:
- Traditional luminescent powders for fingerprint detection can be costly and environmentally unfriendly.
- Developing novel nanomaterials for enhanced forensic trace evidence detection is crucial.
Purpose of the Study:
- To synthesize Yttrium Aluminate (YAlO3) nanoparticles doped with Samarium (Sm3+) using an eco-friendly green combustion method.
- To evaluate the potential of these YAlO3:Sm(3+) nanophosphors for latent fingerprint enhancement on various surfaces.
Main Methods:
- Green combustion synthesis of YAlO3:Sm(3+) nanophosphors using green tea leaf extract.
- Characterization using Powder X-ray Diffraction (PXRD) to confirm phase and crystallite size.
- Photoluminescence spectroscopy to analyze emission properties of Sm(3+) ions.
- Application testing for latent fingerprint enhancement on diverse surfaces.
Main Results:
- Orthorhombic phase YAlO3:Sm(3+) nanophosphors with crystallite sizes of 20-35nm were successfully synthesized.
- Characteristic emission peaks of Sm(3+) ions were observed, suitable for luminescent applications.
- The synthesized nanophosphors exhibited white emission with chromaticity coordinates close to NTSC standards.
- Effective enhancement of latent fingerprints was demonstrated on multiple surfaces, showing high sensitivity and contrast.
Conclusions:
- Eco-friendly YAlO3:Sm(3+) nanophosphors are a viable alternative to conventional fingerprint powders.
- The developed method provides a simple, fast, sensitive, and low-cost approach for forensic fingerprint detection.
- This research opens avenues for utilizing green-synthesized nanomaterials in forensic science.
