Multifunctional Dy (III) doped di-calcium silicate array for boosting display and forensic applications

Abstract

Latent fingerprints (LFPs) are the major physical evidences for identification of individuals during crime spot investigation. Till date, numerous methods were followed to visualize LFPs. However, simple, accurate, and costeffective method has wide scope in advanced forensic field. In our work, Ca2SiO4:Dy3+ nanopowders (NPs) were fabricated via solution combustion route. The optimized sample was employed for visualization of overlapped LFPs by following cost effective powder dusting method. The obtained results reveal complete three levels of ridge characteristics with high sensitivity, reproducibility, selectivity, and reliability on various complex surfaces. The photoluminescence (PL) spectra consist of intense peaks at ~ 480 and 574 nm owing to 4F9/2→6H15/2 and 4F9/2→6H13/2 4f transitions of Dy3+ ions, respectively. The photometric properties confirm that the samples exhibit intense white emission with high color purity. Therefore, the present prepared NPs could be a definitive choice as advanced luminescent NPs for forensic, solid state lighting and portable FED devices.