Exptl. results on the capability of a Sn dioxide (SnO2)-based SiO2 optical fiber (SOF) sensor to detect sub-ppm NH3 concns. in H2O environments, at room temp., are presented. SnO2 sensitive layers were deposited on the fiber end by using the simple and low cost electrostatic spray pyrolysis deposition technique. The surface morphol. of the deposited SnO2 layers as well as its influence on the near field profile of the emergent electromagnetic field from the fiber coating were studied by at. force microscopy and scanning near field optical microscopy. The room temp. adsorption measurements reveal the excellent sensor resoln. of 80 ppb, good recovery features, high repeatability, and fast response times (a few minutes). The results obtained demonstrate the strong potentiality of the proposed SnO2-based SOF sensor to be employed for H2O quality monitoring applications.
Optochemical sensor for water monitoring based on SnO2 particle layer deposited onto optical fibers by the electrospray pyrolysis method
Giordano M
2006
Abstract
Exptl. results on the capability of a Sn dioxide (SnO2)-based SiO2 optical fiber (SOF) sensor to detect sub-ppm NH3 concns. in H2O environments, at room temp., are presented. SnO2 sensitive layers were deposited on the fiber end by using the simple and low cost electrostatic spray pyrolysis deposition technique. The surface morphol. of the deposited SnO2 layers as well as its influence on the near field profile of the emergent electromagnetic field from the fiber coating were studied by at. force microscopy and scanning near field optical microscopy. The room temp. adsorption measurements reveal the excellent sensor resoln. of 80 ppb, good recovery features, high repeatability, and fast response times (a few minutes). The results obtained demonstrate the strong potentiality of the proposed SnO2-based SOF sensor to be employed for H2O quality monitoring applications.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
