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https://hdl.handle.net/1822/38765
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Campo DC | Valor | Idioma |
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dc.contributor.author | Oliveira, J. | por |
dc.contributor.author | Martins, P.M. | por |
dc.contributor.author | Martins, Pedro Libânio Abreu | por |
dc.contributor.author | Correia, V. | por |
dc.contributor.author | Rocha, J. G. | por |
dc.contributor.author | Lanceros-Méndez, S. | por |
dc.date.accessioned | 2015-12-07T18:00:32Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Oliveira, J., Martins, P. M., Martins, P., Correia, V., Rocha, J. G., & Lanceros-Mendez, S. (2015). Gd<inf>2</inf>O<inf>3</inf>:Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors. Applied Physics A: Materials Science and Processing. doi: 10.1007/s00339-015-9435-2 | por |
dc.identifier.issn | 0947-8396 | por |
dc.identifier.uri | https://hdl.handle.net/1822/38765 | - |
dc.description.abstract | Polymer based scintillator composites have been produced by combining polystyrene (PS) and Gd2O3:Eu3+ scintillator nanoparticles. Polystyrene has been used since it is a flexible and stable binder matrix, resistant to thermal and light deterioration and with suitable optical properties. Gd2O3:Eu3+ has been selected as scintillator material due to its wide band gap, high density and visible light yield. The optical, thermal and electrical characteristics of the composites were studied as a function of filler content, together with their performance as scintillator material. Additionally 1wt.% of 2,5 dipheniloxazol (PPO) and 0.01wt.% of (1,4-bis(2-(5-phenioxazolil))-benzol (POPOP) were introduced in the polymer matrix in order to strongly improve light yield, i.e. the measured intensity of the output visible radiation, under X-ray irradiation. Whereas increasing scintillator filler concentration (from 0.25wt.% to 7.5wt.%) increases scintillator light yield, decreases the optical transparency of the composite. The addition of PPO and POPOP, strongly increased the overall 2 transduction performance of the composite due to specific absorption and re-emission processes. It is thus shown that Gd2O3:Eu3+/PPO/POPOP/PS composites in 0.25 wt.% of scintillator content with fluorescence molecules is suitable for the development of innovate large area X-ray radiation detectors with huge demand from the industries. | por |
dc.description.sponsorship | 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/UI607/2013 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 J.O., P. M. M. , P. M. and V. C. thank the FCT for the SFRH/BPD/98219/2013, SFRH/BPD/96227/2013, SFRH/BD/98616/2013 and SFRH/BPD/97739/2013 grants, respectively. | por |
dc.language.iso | eng | por |
dc.publisher | Springer Verlag | por |
dc.relation | PEST-C/FIS/UI607/2013 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/121038/PT | por |
dc.relation | SFRH/BPD/98219/2013 | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F96227%2F2013/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F98616%2F2013/PT | por |
dc.relation | info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F97739%2F2013/PT | por |
dc.rights | restrictedAccess | por |
dc.subject | Polymer-matrix composites | por |
dc.subject | Nano composites | por |
dc.subject | Functional composites | por |
dc.subject | X-ray conversion | por |
dc.title | Gd2O3: Eu3+/PPO/POPOP/PS composites for digital imaging radiation detectors | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
sdum.publicationstatus | published | por |
oaire.citationStartPage | 581 | por |
oaire.citationEndPage | 587 | por |
oaire.citationIssue | 2 | por |
oaire.citationVolume | Article in Press 2015 | por |
dc.identifier.eissn | 1432-0630 | - |
dc.identifier.doi | 10.1007/s00339-015-9435-2 | por |
dc.subject.fos | Ciências Naturais::Ciências Físicas | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Applied Physics A: Materials Science and Processing | por |
Aparece nas coleções: | CAlg - Artigos em revistas internacionais / Papers in international journals CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Oliveira_2015.pdf Acesso restrito! | 868,82 kB | Adobe PDF | Ver/Abrir |