Building up europium thulium co-doped yttria nanoparticles with electron paramagnetic resonance response by colloidal synthesis

Author(s)

Santos, S. C. ; Rodrigues, O. ; Campos, L. L.

• Document type: Journal article
• Source: MATERIALIA; v. 30, p. 13-pg., 2023-06-20.

Abstract

In the radiation dosimetry field the research for new materials is a continuos demand with the aim to provide highly improvement procedures where ionizing radiation is used. Considering this challenge, the present work reports the colloidal synthesis of europium-thulium-co-doped yttria powders (YET) and evaluates the dopants effect on the promotion of EPR response of yttria. The powdered compositions prepared with up to 2at.%Tm and 2at.%Eu (at.%, atomic percentage) were evaluate by XRD, PCS, SEM, and EPR. Based on the results, the proposed synthesis method provided ceramic powders with cubic C-type form and mean particle size (d50) less than 160nm. The most significant EPR dose-response was noticed for the powdered composition prepared with 0.5at. %Tm (YET0.5) as irradiated with 5kGy (60Co). These findings are key parameters to advance toward the formation of new materials for radiation dosimetry. (AU)

• FAPESP's process: 18/05982-0 - R&D&I in radiation metrology in the health area
• Grantee: Linda Viola Ehlin Caldas
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 22/06695-0 - Development of an EPR protocol for dosimetric characterization of co-doped rare-earth yttria based micro ceramics
• Grantee: Silas Cardoso dos Santos
• Support Opportunities: Scholarships in Brazil - Technical Training Program - Technical Training