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Preparation and characterization of new photoluminescent nano-powder based on Eu3+:La2Ti2O7 and dispersed into silica matrix for latent fingerprint detection.

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Title: Preparation and characterization of new photoluminescent nano-powder based on Eu3+:La2Ti2O7 and dispersed into silica matrix for latent fingerprint detection.
Authors: Saif, M.1 mona_saif1@yahoo.com, Alsayed, N.1, Mbarek, A.2, El-Kemary, M.3, Abdel-Mottaleb, M.S.A.4
Source: Journal of Molecular Structure. Dec2016, Vol. 1125, p763-771. 9p.
Subjects: Lanthanum compounds, Nanostructured materials, Rare earth ions, Photoluminescence, Silica, Europium, X-ray powder diffraction
Abstract: Pure lanthanum titanate doped with europium metal ions (La 2 Ti 2 O 7 :Eu 3+ ) and dispersed in silica matrix phosphor powder was prepared by sol–gel process followed by thermal treatment. The prepared nanophosphors were characterized by powder X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), Transmission Electron Microscope (TEM), Energy Dispersive Spectroscopy (EDX), and Photoluminescence Spectroscopy (PL). The effects of silica, thermal treatment, Eu 3+ ion, and surfactant (CTAB) concentrations on the crystal, morphology, and photoluminescence properties were investigated. The present work found that dispersion of La 2 Ti 2 O 7 :Eu 3+ into silica matrix significantly altered the morphology of La 2 Ti 2 O 7 :Eu 3+ from high crystalline micro-plate like shape into amorphous aggregated Nano-spherical shape. The high separated spherical shape with intense red PL emission and long lifetime was obtained from 10 mol% Eu 3+ :La 2 Ti 2 O 7 :Eu 3+ , dispersed into silica matrix, and prepared in the presence of CTAB. The high PL Nano-phosphor has been successfully used in developing latent fingerprint from various forensic relevant materials. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Pure lanthanum titanate doped with europium metal ions (La 2 Ti 2 O 7 :Eu 3+ ) and dispersed in silica matrix phosphor powder was prepared by sol–gel process followed by thermal treatment. The prepared nanophosphors were characterized by powder X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR), Transmission Electron Microscope (TEM), Energy Dispersive Spectroscopy (EDX), and Photoluminescence Spectroscopy (PL). The effects of silica, thermal treatment, Eu 3+ ion, and surfactant (CTAB) concentrations on the crystal, morphology, and photoluminescence properties were investigated. The present work found that dispersion of La 2 Ti 2 O 7 :Eu 3+ into silica matrix significantly altered the morphology of La 2 Ti 2 O 7 :Eu 3+ from high crystalline micro-plate like shape into amorphous aggregated Nano-spherical shape. The high separated spherical shape with intense red PL emission and long lifetime was obtained from 10 mol% Eu 3+ :La 2 Ti 2 O 7 :Eu 3+ , dispersed into silica matrix, and prepared in the presence of CTAB. The high PL Nano-phosphor has been successfully used in developing latent fingerprint from various forensic relevant materials. [ABSTRACT FROM AUTHOR]
ISSN:00222860
DOI:10.1016/j.molstruc.2016.07.075