Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 193, Issue -, Pages 136-141Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.11.022
Keywords
Gas sensor; Electronic nose; Conductive polymer; Porphyrin; Composite sensor
Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [132622/2011-4, 303717/2010-6]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2011/51249-3]
- Grants-in-Aid for Scientific Research [23310076, 25110002] Funding Source: KAKEN
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In this paper, a new composite sensor for e-nose application is described. A modification in the regular pair conductive polymer/Lewis acid dopant is proposed, replacing the acid by free-base or metallated porphyrins. Sensors doped with different porphyrin species, using the same conductive polymer, led to a huge variation in response to selected analytes. Two different arrays (doped with free-base and metallated porphyrins) using these sensors were able to identify four organic solvents, used as standard analytes: propanone, ethyl acetate, ethanol and toluene. Both of them could distinguish the tested vapours. (C) 2013 Elsevier B.V. All rights reserved.
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