Gas sensors made from Langmuir-Blodgett films of porphyrins

1 January 1985

journal article
Published by Institution of Engineering and Technology (IET) in IEE Proceedings I Solid State and Electron Devices

Vol. 132 (3) , 151-156
https://doi.org/10.1049/ip-i-1.1985.0031

Abstract

Langmuir-Blodgett multilayer films of porphyrins have been produced and in-plane conductivity measurements performed on the samples when exposed to the toxic gases NO₂, CO and H₂S. A number of porphyrins showed a large and rapid increase in conductivity when exposed to NO₂. The response of the samples varied with film thickness, the partial pressure of the gas, the central metal ion of the porphyrin and also with the peripheral substituents on the porphyrin ring.

Keywords

PORPHYRINS
TOXIC GASES
PERIPHERAL SUBSTITUENTS
GAS SENSORS
PARTIAL PRESSURE
NO2
RESPONSE STUDY
IN-PLANE CONDUCTIVITY MEASUREMENTS
FILM THICKNESS
LANGMUIR-BLODGETT FILMS
MULTILAYER FILMS
CENTRAL METAL ION
H2S

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