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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Atmospheric plasma-assisted modification of nanosized LiYF4:Eu3+ with gold nanoparticles

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Autor(es):
Goncalves, Joao Marcos [1] ; Guillot, Ph. [2] ; Caiut, J. M. A. [1] ; Caillier, B. [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Chem FFCLRP, Ribeirao Preto, SP - Brazil
[2] Univ Toulouse, Lab Diagnost Plasmas Hors Equilibre DPHE, INU Champoll, Albi - France
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 30, n. 18, SI, p. 16724-16731, SEP 2019.
Citações Web of Science: 0
Resumo

Both gold and rare-earth doped fluoride nanoparticles have been drawing interest for their possible biological applications, for therapy or for bioimaging. Gold nanoparticles can be used as a heat source for photothermal therapy, absorbing energy through its surface plasmon resonance (SPR) band and converting it to heat, whereas the low phonon energy, long emission lifetimes and sharp emission lines of the fluoride nanoparticles can circumvent several drawbacks of other used materials for bioimaging. In this context, this article proposes a modification of nanosized europium doped-LiYF4 with gold nanoparticles using a helium atmospheric plasma to reduce Au3+ to form the gold nanoparticles. In this article, we successfully synthesized citrate stabilized gold nanoparticles assisted by a helium atmospheric plasma, which showed a broad size distribution between 30 and 109 nm and different shapes, and a SPR band at 544 nm. We also successfully modified LiYF4:Eu3+ with gold nanoparticles with the atmospheric plasma jet, which presented a SPR band at 539 nm and significantly suppressed europium luminescence possibly due to the absorption of the emitted photons of the Eu3+ by the gold SPR band. (AU)

Processo FAPESP: 16/11670-5 - NANOMATERIAIS e SISTEMAS LUMINESCENTES BASEADOS EM ÍONS TERRAS RARAS
Beneficiário:José Maurício Almeida Caiut
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 18/10172-7 - Desenvolvimento de novos luminóforos aplicados à descontaminação biológica
Beneficiário:José Maurício Almeida Caiut
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional