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Durham University

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Publication details for Professor Andy Monkman

Barker, PS, Petty, MC, Monkman, AP, McMurdo, J, Cook, MJ & Pride, R (1996). A hybrid phthalocyanine/silicon field-effect transistor sensor for NO2. Thin Solid Films 285: 94-97.
  • Publication type: Journal Article
  • ISSN/ISBN: 0040-6090
  • Keywords: silicon; nitrogen dioxide; sensors; metal-oxide semiconductor structureGAS; FILMS

Author(s) from Durham


Thin films of a metal-free octahexyl-substituted phthalocyanine were
prepared by spin coating. The films were smooth and showed optical
absorption spectra similar to those of films of a structurally related
compound prepared by the Langmuir-Blodgett technique, A novel gas
sensor has been fabricated by incorporating these films into the gate
electrode of a metal-oxide-semiconductor field-effect transistor. On
the application of a gate voltage, a delay was observed in the response
of the drain current. This delay characteristic was found to depend on
the concentration of NO2. Results are presented showing that the device
can detect reversibly concentrations of NO2 down to 2 ppm at room