Annealing-assisted optimization for persistency of afterglow of SrAl2O4:Eu2+/Dy3+ microparticles for forensic detection

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Kumar, A (Author) Other; Crista, DMA (Author) Other; Núñez-Montenegro, A (Author) Other; Joaquim C G E Esteves da Silva (Author) FCUP; Verma, SK (Author) Other

Journal

Title: RSC Advances

Vol. 13

ISSN: 2046-2069

Publisher: Royal Society of Chemistry

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00Z-3E6

DOI: 10.1039/d3ra03872f

Abstract (EN): In the present work, Eu2+/Dy3+ ions doped/co-doped into persistent SrAl2O4 microparticles have been developed through solid-state synthesis followed by homogenization and particle size reduction in a ball milling device. These particles have shown a broad and long-persistent afterglow around the 528 nm wavelength of electromagnetic radiation through a broad excitation at around 400 nm. The luminescence intensity was optimized through the selection of different annealing temperatures in the range of 1100 C-degrees to 1500 C-degrees, with intervals of 100 C-degrees. Several structural and optical characterization techniques, such as XRD, SEM, FTIR, thermogravimetric analysis, and photoluminescence, were utilized to judge the preparation and ability of these particles in possible applications in latent fingermark detection on various difficult surfaces. The persistency and stability of these particles were calculated using a digital lux meter.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10