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Title: X-ray dose detector based on color changing of light-emitting polymer–metal complex hybrid material.
Authors: Schimitberger, Thiago
Ferreira, Giovana Ribeiro
Saraiva, Marcelo Frota
Bianchi, Andrea Gomes Campos
Bianchi, Rodrigo Fernando
Keywords: Dosimeter
Optical sensor
Semiconducting polymer
Organic device
Issue Date: 2012
Publisher: Sensors and Actuators B: Chemical
Citation: SCHIMITBERGER, T. ; et al. X-ray dose detector based on color changing of light-emitting polymer–metal complex hybrid material. Sensors and Actuators B: Chemical, v. 168, n. 20, p. 131-137, jun. 2012. Disponível em: <>. Acesso em: 10 jul. 2012.
Abstract: We report on the design, fabrication and performance of a poly (2-methoxy-5(2_-ethylhexyloxy)- p-phenylenevinylene)/tris-(8-hydroxyquinoline)aluminum (MEH-PPV/Alq3) X-ray dose detector for improving safety for cancer patients shortly before radiation therapy. The detector consists of an inexpen-sive (<US$ 1) organic device that is irreversibly color changing from red, to yellow, to green and measures the delivered dose from the radiation beams of a linear accelerator (6 MV) in the range of 0–40 Gy. The effect of radiation on the optical properties of MEH-PPV/Alq3 was described and we observed a strong correlation between the photoemission spectrum of Alq3 and the photoemission and absorption spectra of MEH-PPV degraded by radiation. A series of tests was conducted on the performance of the organic detector in measuring depth-dose distribution of photon beams in a water phantom and demonstrating linearity in the shift of PL and absorption as functions of the dose. These results have enabled the qual-itative and quantitative analysis of how the radiation instability of optical properties of MEH-PPV/Alq3 can be used to develop an innovative organic device for radiation therapy.
ISSN: 09254005
metadata.dc.rights.license: O periódico Sensors and Actuators B: Chemical concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3460340615308.
Appears in Collections:DEFIS - Artigos publicados em periódicos

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