Sensor properties of lead phthalocyanine in a surface acoustic wave system

The paper presents experimental results of the interaction of thin layers (83 and 310 nm) of lead phthalocyanine (PbPc) with trace amounts of toxic gas NO 2 in a system with an acoustic surface wave on a LiNbO 3 Y- Z substrate. PbPc films were prepared according to the usual vacuum evaporation metho...

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Bibliographic Details
Published in:Ultrasonics 2001-04, Vol.39 (3), p.227-232
Main Authors: Jakubik, W., Urbańczyk, M., Opilski, A.
Format: Article
Language:English
Subjects:
Acoustic signal processing
Acoustics
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lead phthalocyanine
Materials science
Materials testing
Methods of materials testing and analysis
Physics
Sensor
Surface acoustic wave
Ultrasonics, quantum acoustics, and physical effects of sound
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Summary:The paper presents experimental results of the interaction of thin layers (83 and 310 nm) of lead phthalocyanine (PbPc) with trace amounts of toxic gas NO 2 in a system with an acoustic surface wave on a LiNbO 3 Y- Z substrate. PbPc films were prepared according to the usual vacuum evaporation method. Measurements of the sensor properties rely on changes in the differential frequency, Δf, of the dual-delay line configuration, in one of which the investigated PbPc layer has been placed. Special stress has been put on the temperature dependence of the reversibility in the medium range, i.e. between 27°C and 95°C. Besides, one simple method for thin PbPc film regeneration in a low NO 2 concentration range has been presented.
ISSN:0041-624X
1874-9968
DOI:10.1016/S0041-624X(00)00061-5