Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 64, Issue 1-3, Pages 124-127Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-4005(99)00494-3
Keywords
smoke sensor; layer-by-layer adsorption; self-assembly; polyelectrolyte; quartz crystal microbalance
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Remarkable smoke-detecting characteristics were established by forming ultra-thin organic films on an electrode of a quartz crystal microbalance (QCM) by a layer-by-layer sequential adsorption process utilizing polyelectrolytes. The amount of smoke adsorbed onto the polyelectrolyte film was controlled by adjusting the bilayer composition ratio of polycation/polyanion using the automatic dipping machine with a film-mass control system we have developed. The optimization of film structure for the purpose of developing a highly sensitive sensor for smoke was established for the first time. By using a newly built system and these characteristics, an extremely sensitive smoke detector was developed. (C) 2000 Elsevier Science S.A. All rights reserved.
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