Piezotronic, ZnO overlaid Bragg grating organic vapor sensors
Fecha
2023Autor
Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Identificador del proyecto
Impacto
|
10.1109/JSEN.2023.3270966
Resumen
We present a zinc oxide (ZnO) out-cladding,
overlaid optical fiber Bragg grating sensor, for the detection
of vapors of common alcohols and acetone at concentrations
lower than 25 ppm while operating at room temperature (RT).
The optical fiber sensing results indicate a chemostriction
effect occurring in the ZnO layer when exposed to volatile
organic compounds (VOCs), which in turn induces ...
[++]
We present a zinc oxide (ZnO) out-cladding,
overlaid optical fiber Bragg grating sensor, for the detection
of vapors of common alcohols and acetone at concentrations
lower than 25 ppm while operating at room temperature (RT).
The optical fiber sensing results indicate a chemostriction
effect occurring in the ZnO layer when exposed to volatile
organic compounds (VOCs), which in turn induces shifts in
the cladding, and most importantly, in the core confined,
Bragg mode. The sensor exhibits a maximum sensitivity
of ∼1 pm/ppm to ethanol vapors, with exposure to other
alcohol vapors (isopropanol and methanol) showing lower
sensitivities; also, response to acetone vapors was traced at
∼0.5 pm/ppm. X-ray diffraction (XRD) measurements of the
ZnO nanolayer revealed that, in saturated ethanol vapors atmosphere, the polycrystalline ZnO film undergoes a contraction by 0.6% of the interplanar distance corresponding to the (002) crystalline direction, denoting the chemostrictive
effect through an underlying piezotronic mechanism. XRD measurements and optical fiber sensing data are further
correlated by numerical simulations carried out, so to study the strain interactions of the ZnO layer with the silica glass
optical fiber. [--]
Materias
Piezotronics,
Tilted optical fiber Bragg grating (TOFBG) sensors,
Volatile organic compounds (VOCs),
Zinc oxide (ZnO)
Editor
IEEE
Publicado en
IEEE Sensors Journal, 23(12) 12536-12543
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica, Electrónica y de Comunicación /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza Saila
Versión del editor
Entidades Financiadoras
This
work was supported in part by the Accelerating Photonics Deployment through the One Stop Shop Advanced Technology Access for
Researchers (ACTPHAST 4R) Project under Grant 825051, in part
by the Laserlab-Europe under Grant EU-H2020 871124, in part by
the Spanish Government under Project PID2019-106070RB-I00, and
in part by the NextGenerationEU - “Margarita Salas Program Grants”
by the Public University of Navarre (UPNA).