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NO2 sensitivity of gadolinium bis-phthalocyanine assemblies prepared by ultra-fast LB deposition

Authors :
R. Rella
L. Valli
Colin M. Dooling
Tim H. Richardson
Jianzhuang Jiang
C. M., Dooling
T. H., Richardson
Valli, Ludovico
R., Rella
J., Jiang
Source :
198 (2002): 791–796., info:cnr-pdr/source/autori:Dooling C.M., Richardson T.H., Valli L., Rella R., Jiang J./titolo:NO2 sensitivity of gadolinium bis-phthalocyanine assemblies prepared by ultra-fast LB deposition/doi:/rivista:/anno:2002/pagina_da:791/pagina_a:796/intervallo_pagine:791–796/volume:198
Publication Year :
2002
Publisher :
Elsevier BV, 2002.

Abstract

The sensitivity of gadolinium bis-phthalocyanine assemblies to different concentrations of NO2 has been studied. Gold (on chrome) interdigitated electrodes on glass were passed through a floating Langmuir monolayer at 1000 mm min−1 for 20 excursions. This ultra-fast technique has greatly reduced the time needed to manufacture samples and has led to a defect structure in the deposited layers with an enhanced surface area to volume ratio. The resulting films were tested as chemiresistors in low concentrations of NO2 (0.25–4 ppm). A highly linear calibration plot (fractional current vs. concentration plot) was obtained over the concentration range 0.25–1.0 ppm, with a gradient of ∼210% ppm−1.

Details

ISSN :
09277757
Database :
OpenAIRE
Journal :
Colloids and Surfaces A: Physicochemical and Engineering Aspects
Accession number :
edsair.doi.dedup.....00b28084680770a4f07e258e5ab9f91b
Full Text :
https://doi.org/10.1016/s0927-7757(01)01001-9