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- W1930550903 abstract "In this study, a series of new soluble dodecylsulfanylphthalocyanines are investigated as sensitive coatings for organic vapors by utilizing modified and conventional electrode quartz crystal resonators (QCR) based on changes in dielectric properties (electrical loading) and the well-known mass loading effect. These sensing properties were investigated by measuring both seriesand parallel-resonant frequencies (f/sub s/ and f/sub p/). The results showed that the sensor signals are completely reversible and reproducible at room temperature. Differences between f/sub s/ and f/sub p/ were observed for all investigated analytes. The two sets of data appear to be linearly independent, thus providing the possibility of implementing chemical sensors with improved selectivity using pattern recognition. In addition, the interaction mechanisms between the volatile organic molecules and the investigated phthalocyanine (Pc) coatings are discussed utilizing the partition coefficients of the vapor molecules, and possible changes in the electrical properties of the coatings. In order to study all possible interaction mechanisms as well as the properties of the Pc materials, thin coatings of the Pc materials are deposited on interdigital transducers on glass substrates and are being studied using impedance spectroscopy methods. The dc conductivities of the Pc materials exposed to Cl/sub 2/ and Br/sub 2/ were also investigated." @default.
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- W1930550903 date "2002-11-27" @default.
- W1930550903 modified "2023-10-18" @default.
- W1930550903 title "Soluble dodecylsulfanylphthalocyanines as sensitive coatings for chemical sensors in gas phase" @default.
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- W1930550903 doi "https://doi.org/10.1109/freq.1998.717973" @default.
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