Gd2O3: Eu Nanoparticle-Based Poly(vinylidene fluoride) Composites for Indirect X-ray Detection


Autoria(s): Martins, P. M.; Martins, Pedro Libânio Abreu; Correia, V.; Rocha, J. G.; Lanceros-Méndez, S.
Data(s)

2015

Resumo

Polymer based scintillator composites have been fabricated by combining poly(vinylidene fluoride) (PVDF) and Gd2O3:Eu nanoparticles (50nm). PVDF has been used since it is a flexible and stable binder matrix and highly resistance to thermal and light deterioration. Gd2O3:Eu has been selected as scintillator material due to its wide band gap, high density and suitable visible light yield. The structural, mechanical, thermal and electrical characteristics of the composites were studied as a function of filler content, together with their performance as scintillator material. The introduction of Gd2O3:Eu nanoparticles into the PVDF matrix does not influence the morphology of the polymer or the degree of crystallinity. On the other hand, an increase of the Young´s modulus with respect to PVDF matrix is observed for filler contents of 0.1-0.75 wt.%. The introduction of Gd2O3:Eu into the PVDF matrix increases dielectric constant and DC electrical conductivity as well as the visible light yield in the nanocomposite, being this increase dependent upon Gd2O3:Eu content and X-ray input power. In this way, Gd2O3:Eu/PVDF composites shows suitable characteristics to be used as X-ray radiation transducers, in particular for large area applications.

This work was supported by FEDER through the COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project PEST-C/FIS/UI607/2011 and project PTDC/CTM-NAN/121038/2010. The authors also thank funding from Matepro –Optimizing Materials and Processes”, ref. NORTE-07-0124-FEDER-000037”, co-funded by the “Programa Operacional Regional do Norte” (ON.2 – O Novo Norte), under the “Quadro de Referência Estratégico Nacional” (QREN), through the “Fundo Europeu de Desenvolvimento Regional” (FEDER). Support from COST Action MP0902 (Composites of Inorganic Nanotubes and Polymers, COINAPO) is also acknowledged.

Identificador

Martins, P. M., Martins, P., Correia, V., Rocha, J. G., & Lanceros-Mendez, S. (2015). Gd2O3:Eu Nanoparticle-Based Poly(vinylidene fluoride) Composites for Indirect X-ray Detection. Journal of Electronic Materials, 44(1), 129-135. doi: 10.1007/s11664-014-3407-8

0361-5235

1543-186X

http://hdl.handle.net/1822/38749

10.1007/s11664-014-3407-8

Idioma(s)

eng

Publicador

Institute of Electrical and Electronics Engineers (IEEE)

Relação

PEST-C/FIS/UI0607/2011

info:eu-repo/grantAgreement/FCT/5876-PPCDTI/121038/PT

Direitos

info:eu-repo/semantics/restrictedAccess

Palavras-Chave #X-ray #Scintillator #PVDF #Gd2O3-Eu #Composites
Tipo

info:eu-repo/semantics/article