| Full text | |
| Author(s): |
Santos, Juliana S.
[1]
;
Raimundo, Jr., Ivo M.
[1]
;
Cordeiro, Cristiano M. B.
[2]
;
Biazoli, Claudecir R.
[2]
;
Gouveia, Carlos A. J.
[3]
;
Jorge, Pedro A. S.
[3]
Total Authors: 6
|
| Affiliation: | [1] Univ Estadual Campinas, Inst Chem, UNICAMP, BR-13083970 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Inst Phys Gleb Wataghin, UNICAMP, BR-13083859 Campinas, SP - Brazil
[3] INESC Porto, P-4169007 Oporto - Portugal
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | SENSORS AND ACTUATORS B-CHEMICAL; v. 196, p. 99-105, JUN 2014. |
| Web of Science Citations: | 33 |
| Abstract | |
Nafion has been evaluated as a sensing phase of an optical fibre humidity sensor based on a low-finesse Fabry-Perot interferometer. The sensor was constructed by manual deposition of a drop of a Nafion solution on the tip of a single mode optical fibre, forming a Fabry-Perot resonant cavity. The absorption of water by the Nafion film makes it swells, changing its refractive index and the length of the cavity, which produces a phase shift in the interference signal. The sensitivity, stability and response time of the sensor were evaluated in the RH range from 22 to 80% by analysing the correspondent reflection spectra of the interference fringes. As a result, it was obtained that Nafion can be used as sensing phase of an optical fibre humidity sensor based on optical fibre Fabry-Perot interferometry, presenting a response time of 242 ms (3% RH variation) and a sensitivity of 3.5 nm/%RH. (C) 2014 Elsevier B.V. All rights reserved. (AU) | |
| FAPESP's process: | 11/00322-2 - Development of an optical sensor for determination of moisture in air and natural gas |
| Grantee: | Juliana Santiago dos Santos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 08/57808-1 - National Institute of Advanced Analytical Science and Technology |
| Grantee: | Celio Pasquini |
| Support Opportunities: | Research Projects - Thematic Grants |