| Full text | |
| Author(s): |
Pereira, Camila F.
[1]
;
Olean-Oliveira, Andre
[1]
;
David-Parra, Diego N.
[1]
;
Teixeira, Marcos F. S.
[1]
Total Authors: 4
|
| Affiliation: | [1] Sao Paulo State Univ UNESP, Dept Chem & Biochem, Sch Sci & Technol, Rua Roberto Simonsen 305, BR-19060900 Presidente Prudente, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Talanta; v. 190, p. 119-125, DEC 1 2018. |
| Web of Science Citations: | 0 |
| Abstract | |
A resistance detection device for dissolved molecular oxygen in aqueous solutions is prepared using a chemiresistor material as sensor platform. The chemiresistive circuit element is fashioned from a thin film of a cobalt-salen metallopolymer electrodeposited on a platinum electrode. Electrochemical impedance spectroscopy shows that the resistive and capacitive properties of the sensor platform depend on the presence of dissolved oxygen. The electrical circuit models are R(Q/R)(Q/R) and R(Q/R)(Q/RW) in the absence and presence of oxygen, respectively. The chemiresistor sensor exhibits good sensitivity (0.483 k Omega L mg(-1)), excellent reversibility and excellent linearity over a range of dissolved oxygen concentrations typically found under environmental conditions (2.72-40.9 mg L-1). The sensor fabricated in this work can potentially serve as an alternative sensor for the detection of dissolved oxygen in environmental samples. (AU) | |
| FAPESP's process: | 16/09017-1 - STUDY OF THE FILM FORMATION OF SCHIFF BASE METALLIC COMPLEXES |
| Grantee: | Marcos Fernando de Souza Teixeira |
| Support Opportunities: | Regular Research Grants |