Simple preparation of fluorescent composite films based on cerium and europium doped LaF3 nanoparticles

Simple preparation of fluorescent composite films based on cerium and europium doped LaF3 nanoparticles

Author Secco, Henrique de L. Autor UNIFESP Google Scholar
Ferreira, Fabio F. Google Scholar
Peres, Laura O. Autor UNIFESP Google Scholar
Abstract The combination of materials to form hybrids with unique properties, different from those of the isolated components, is a strategy used to prepare functional materials with improved properties aiming to allow their application in specific fields. The doping of lanthanum fluoride with other rare earth elements is used to obtain luminescent particles, which may be useful to the manufacturing of electronic devices' displays and biological markers, for instance. The application of the powder of nanoparticles has limitations in some fields

to overcome this, the powder may be incorporated in a suitable polymeric matrix. In this work, lanthanum fluoride nanoparticles, undoped and doped with cerium and europium, were synthesized through the co-precipitation method in aqueous solution. Aiming the formation of solid state films, composites of nanoparticles in an elastomeric matrix, the nitrile rubber (NBR), were prepared. The flexibility and the transparency of the matrix in the regions of interest are advantages for the application of the luminescent composites. The composites were applied as films using the casting and the spin coating techniques and luminescent materials were obtained in the samples doped with europium and cerium. Scanning electron microscopy images showed an adequate dispersion of the particles in the matrix in both film formation techniques. Aggregates of the particles were detected in the samples which may affect the uniformity of the emission of the composites.
Keywords Lanthanum
Rare earth
Nanoparticles
Fluorescence
Composites
xmlui.dri2xhtml.METS-1.0.item-coverage San Diego
Language English
Sponsor CNPq [402289/2013-7, 307664/2015-5]
FAPESP [2013/13621-3]
INEO-INCT [FAPESP 2008/57706-4]
Date 2018
Published in Journal Of Solid State Chemistry. San Diego, v. 259, p. 43-47, 2018.
ISSN 0022-4596 (Sherpa/Romeo, impact factor)
Publisher Academic Press Inc Elsevier Science
Extent 43-47
Origin http://dx.doi.org/10.1016/j.jssc.2017.12.026
Access rights Closed access
Type Article
Web of Science ID WOS:000424857600007
URI https://repositorio.unifesp.br/handle/11600/54086

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