Intensity based luminescent optical fiber oxygen sensor using quantum dots

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2005

Autores

Jorge, PAS (Autor) Outra; Mayeh, M (Autor) Outra; Benrashid, R (Autor) Outra; Caldas, P (Autor) Outra; Santos, JL (Autor) FCUP; Farahi, F (Autor) Outra

Ata de Conferência Internacional

Título: 17th International Conference on Optical Fibre Sensors, Pts 1 and 2

Páginas: 391-394

17th International Conference on Optical Fibre Sensors

Brugge, BELGIUM, MAY 23-27, 2005

Indexação

ISI Web of Knowledge - 2 Citações

Scopus - 2 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Outras ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-007-EEV

DOI: 10.1117/12.623643

Abstract (EN): The suitability of semiconductor nanoparticles to provide a reference signal in luminescence based chemical sensors is addressed. A CdSe-ZnS nanocrystal, with emission peak at 520 nm is used to provide a reference signal. Measurements of oxygen concentration, which are based on the dynamic quenching of the luminescence of a Ruthenium complex, are performed. Both dye and the nanocrystal are immobilized in a sol-gel matrix and are excited by a blue LED. Results are presented showing that the ratio between the reference and the sensor signals is highly insensitive to fluctuations of the excitation optical power. Preliminary results show that nanocrystals could be used to measure temperature and provide a reference signal.

Idioma: Inglês

Tipo (Avaliação Docente): Científica