Intensity based luminescent optical fiber oxygen sensor using quantum dots

• Type: Article in International Conference Proceedings Book
• Date: 2005

Authors

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

Conference proceedings International

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

Pages: 391-394

17th International Conference on Optical Fibre Sensors

Brugge, BELGIUM, MAY 23-27, 2005

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 2 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific