New design of highly sensitive and selective MoO3 :Eu3+ micro-rods: Probing of latent fingerprints visualization and anti-counterfeiting applications

Journal of Colloid and Interface Science
H S YoganandaH Nagabhushana

Abstract

Red colour light emitting Eu3+ ions activated MoO3 nanophosphors (NPs) were prepared through an ultrasound assisted sonochemical method using Aloe Vera (A.V.) gel as a bio-surfactant. Properties like crystal structure, morphology, optical band gap, luminescent properties, radiative parameters of prepared samples and their use in latent fingerprint (LFPs) visualization were reported. Powder X-ray diffraction results revealed the single orthorhombic crystal structure of the prepared samples, which specifies effective substitution of dopant ions. Morphology of NPs exhibits the hexagonal rod-like structures with size of ∼10 nm. Photoluminescence (PL) emission spectra exhibited sharp, intense peaks at ∼539 nm, 593 nm, 615 nm, 651 nm and 702 nm attributed to 5D0 → 7F0, 5D0 → 7F1, 5D0 → 7F2, 5D0 → 7F3 and 5D0 → 7F4 transitions of Eu3+ ions respectively. Judd-Ofelt (J-O) theory was used to estimate the PL intensity parameters and Eu-O ligand behavior. The International Commission on Illumination coordinates of the prepared samples located in the pure red region. The optimized sample can be explored as a novel sensing material for the visualization of LFPs on various surfaces under 254 nm UV light. Clear level-3 patterns (sweat pores) w...Continue Reading

Citations

Jan 2, 2021·Forensic Science International : Synergy·Andy BécueChristophe Champod

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