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Proceedings Paper

Spin-coated thin films of different metal phthalocyanines and porphyrin-phthalocyanine blend for optochemical sensors of volatile organic compounds
Author(s): Roberto Rella; Simona Capone; Pietro Siciliano; J. Spadavecchia; G. Ciccarella
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Paper Abstract

Spin-coated layers of ZnPc and CuP have been used as chemically interacting materials for the detection of alcohols, amines, ketones, alkanes and pyridine for applications in food quality control. The UV-VIS variations obtained by the exposure of the sensing layers to the mentioned analytes in controlled atmosphere have been analyzed and compared with those deriving by a single thin film obtained by mixing the two metal complexes in an appropriate ratio. A multichannel monitoring of the main bands of the sensing layer due to the interaction with the analyte vapors became the basis to construct a set of independent sensors located on a single sensing element. The effects in the variation of the absorption bands of the blend system are compared with the variations in absorbance observed with the two sensing layers fabricated separately with each single compound. The interaction between the VOCs species and the heterogeneous sensing layer shows a different behavior in the responses respect to the results obtained with each single compound.

Paper Details

Date Published: 9 June 2004
PDF: 4 pages
Proc. SPIE 5502, Second European Workshop on Optical Fibre Sensors, (9 June 2004); doi: 10.1117/12.566796
Show Author Affiliations
Roberto Rella, IMM/CNR (Italy)
Simona Capone, IMM/CNR (Italy)
Pietro Siciliano, IMM/CNR (Italy)
J. Spadavecchia, Univ. degli Studi di Lecce (Italy)
G. Ciccarella, Univ. degli Studi di Lecce (Italy)

Published in SPIE Proceedings Vol. 5502:
Second European Workshop on Optical Fibre Sensors
Jose Miguel Lopez-Higuera; Brian Culshaw, Editor(s)

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