Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Goncalves, Joao Marcos [1] ; Guillot, Ph. [2] ; Caiut, J. M. A. [1] ; Caillier, B. [2]
Total Authors: 4
[1] Univ Sao Paulo, Dept Chem FFCLRP, Ribeirao Preto, SP - Brazil
[2] Univ Toulouse, Lab Diagnost Plasmas Hors Equilibre DPHE, INU Champoll, Albi - France
Total Affiliations: 2
Document type: Journal article
Source: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS; v. 30, n. 18, SI, p. 16724-16731, SEP 2019.
Web of Science Citations: 0

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)

Grantee:José Maurício Almeida Caiut
Support Opportunities: Regular Research Grants
FAPESP's process: 18/10172-7 - Development of new UV-C phosphor applied to biological decontamination
Grantee:José Maurício Almeida Caiut
Support Opportunities: Research Grants - Visiting Researcher Grant - International