Synthesis of thulium-yttria nanoparticles with EPR response
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2021
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LATIN-AMERICAN CONGRESS ON SOLID STATE DOSIMETRY AND RADIATION MEASUREMENTS, 1st
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Introduction: High dose dosimetry demands a
continuous effort towards the development of new materials
with the aim to guarantee assurance of activities
in which ionizing radiation is used. The present work
reports a hydrothermal synthesis based on a relative
low temperature and pressure to form thulium-yttria
nanoparticles with electron paramagnetic resonance response.
Material and method: Thulium-yttria nanoparticles
(Tm:Y2O3) prepared with 0.1at.%Tm (atomic
percentage, at.%) were synthesized by an eco-friendly
hydrothermal process as reported in previous study[1].
The nanoparticles were characterized by Photon Correlation
Spectroscopy (PCS), X-ray diffraction (XRD),
Scanning Electron Microscopy (SEM), and Electron
Paramagnetic Resonance (EPR).
Results: According to results, the hydrothermal
method provided thulium-yttria nanoparticles with cubic
C-type structure, mean particle size (d50) less than
90nm (Fig.1), and EPR response. The EPR spectra of
powders exhibited two resonance peaks p1 and p2 recorded
at 350 and 160mT, respectively (Fig.2).
Conclusions: The enhancement of the EPR response
of yttria by the use of thulium as a dopant
provide meaningful parameters to advance in the formation
of new rare earth based materials for radiation dosimetry.
Como referenciar
SANTOS, S.C.; RODRIGUES JUNIOR, O.; CAMPOS, L.L. Synthesis of thulium-yttria nanoparticles with EPR response. In: LATIN-AMERICAN CONGRESS ON SOLID STATE DOSIMETRY AND RADIATION MEASUREMENTS, 1st, September 13-17, 2021, Online. Resumo expandido... Disponível em: http://repositorio.ipen.br/handle/123456789/32928. Acesso em: 19 Mar 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.