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Pyridine Vapors Detection by an Optical Fibre Sensor

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ABSTRACT

An optical fibre sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in colour from blue to pink-white in presence of pyridine vapours. This complex is added to a solution of PVC (Poly Vinyl Chloride), TBP (Tributylphosphate) and tetrahydrofuran (THF), forming a plasticized matrix; by dip coating technique, the sensing material is fixed onto a cleaved ended optical fibre. The fabrication process was optimized in terms of number of dips and dipping speed, evaluating the final devices by dynamic range. Employing a reflection set up, the absorbance spectra and changes in the reflected optical power of the sensors were registered to determine their response. A linear relation between optical power versus vapor concentration was obtained, with a detection limit of 1 ppm (v/v).

No MeSH data available.


Optical Power Response by tuning the number of layers.
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f5-sensors-08-00847: Optical Power Response by tuning the number of layers.

Mentions: After this, the variation in reflected optical power was registered for all the sensors when exposed to pyridine vapors; as the response time of the sensors is also influenced by the evaporation time of the organic sensors, only dynamic range was used to evaluate the sensors response. Results obtained can be observed in figure 5, and are summarized in table 1.


Pyridine Vapors Detection by an Optical Fibre Sensor
Optical Power Response by tuning the number of layers.
© Copyright Policy
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC3927524&req=5

f5-sensors-08-00847: Optical Power Response by tuning the number of layers.
Mentions: After this, the variation in reflected optical power was registered for all the sensors when exposed to pyridine vapors; as the response time of the sensors is also influenced by the evaporation time of the organic sensors, only dynamic range was used to evaluate the sensors response. Results obtained can be observed in figure 5, and are summarized in table 1.

View Article: PubMed Central - PubMed

ABSTRACT

An optical fibre sensor has been implemented towards pyridine vapors detection; to achieve this, a novel vapochromic material has been used, which, in solid state, suffers a change in colour from blue to pink-white in presence of pyridine vapours. This complex is added to a solution of PVC (Poly Vinyl Chloride), TBP (Tributylphosphate) and tetrahydrofuran (THF), forming a plasticized matrix; by dip coating technique, the sensing material is fixed onto a cleaved ended optical fibre. The fabrication process was optimized in terms of number of dips and dipping speed, evaluating the final devices by dynamic range. Employing a reflection set up, the absorbance spectra and changes in the reflected optical power of the sensors were registered to determine their response. A linear relation between optical power versus vapor concentration was obtained, with a detection limit of 1 ppm (v/v).

No MeSH data available.