Síntese, caracterização e investigação da propriedade luminescente do ZnO e do ZrO 2 dopados com európio e suas aplicações na ciência forense
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Data
2018-09-28
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Universidade Federal de Goiás
Resumo
Recently, luminescent materials have aroused interest in the scientific and
expert community due to their unique properties. These luminescent materials are being used
in the production of papillary developers with excellent advantages over the commonly
employed methods. These materials are based on inorganic matrices doped with TR 3+ ions. In
the present work, zinc oxide (ZnO) and zirconium dioxide (ZrO 2 ) matrices with different
concentrations of the earth-rare ion europium (III) were synthesized for the development of
fingerprints. The materials were obtained by the sol-gel process and characterized by X-ray
diffraction, photoluminescence and scanning electron microscopy to evaluate the structural
properties. The XRD results showed ZnO hexagonal and ZrO 2 with different tetragonal and
monoclinic phase compositions. The photoluminescent results indicated that the percentage of
europium directly influences the optical properties of the synthesized materials. The
synthesized materials revealed the fingerprint with clear contours that enable identification.
The microscopic magnification allows visualizing the adherence of the materials by the
residues of the fingerprints. Finally, the luminescent processes of Eu 3+ doped in different
matrices provide the widening of the range of papillary developers. The results found
contribute to the development of new materials for the development of fingerprints.
Descrição
Palavras-chave
Sol-gel, Luminescência, Dopagem, Óxido de zinco, Dióxido de zircônio, Impressão digital, Európio, Luminescence, Doping, Zinc oxide, Zrconium dioxide, Fingerprint, Europium
Citação
BERNARDES, Y. R. C. P. Síntese, caracterização e investigação da propriedade luminescente do ZnO e do ZrO2 dopados com európio e suas aplicações na ciência forense. 2018. 77 f. Dissertação (Mestrado em Química) - Universidade Federal de Goiás, Catalão, 2018.