Authors:
Ana Carolina Pádua
1
;
Susana Palma
1
;
Jonas Gruber
2
;
Hugo Gamboa
3
and
Ana Cecília Roque
1
Affiliations:
1
Universidade NOVA de Lisboa, Portugal
;
2
Instituto de Química da Universidade de São Paulo, Brazil
;
3
Faculdade de Ciências e Tecnologia da Universidade NOVA de Lisboa, Portugal
Keyword(s):
Device, Electronic-nose, Gas Sensing, Volatile Organic Compounds.
Abstract:
Electronic noses (E-noses) are devices capable of detecting and identifying Volatile Organic Compounds
(VOCs) in a simple and fast method. In this work, we present the development process of an opto-electronic
device based on sensing films that have unique stimuli-responsive properties, altering their optical and
electrical properties, when interacting with VOCs. This interaction results in optical and electrical signals that
can be collected, and further processed and analysed. Two versions of the device were designed and
assembled. E-nose V1 is an optical device, and E-nose V2 is a hybrid opto-electronic device. Both E-noses
architectures include a delivery system, a detection chamber, and a transduction system. After the validation
of the E-nose V1 prototype, the E-nose V2 was implemented, resulting in an easy-to-handle, miniaturized and
stable device. Results from E-nose V2 indicated optical signals reproducibility, and the possibility of coupling
the electrical signals to the op
tical response for VOCs sensing.
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