Development of a Biosensor Based on a Piezoelectric Film

Most gravimetric biosensors use thin piezoelectric quartz crystals (quartz crystal microbalance, QCM), either as resonating crystals, or as bulk/surface acoustic wave (SAW) devices. A system is described in which acoustic waves are launched in very thin (25 microns) polymer films to produce an oscil...

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Bibliographic Details
Published in:Key engineering materials 2002-01, Vol.230-232, p.491-496
Main Authors: Marat-Mendes, José N., Inácio, Paulo, Dias, C.J.
Format: Article
Language:English
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Summary:Most gravimetric biosensors use thin piezoelectric quartz crystals (quartz crystal microbalance, QCM), either as resonating crystals, or as bulk/surface acoustic wave (SAW) devices. A system is described in which acoustic waves are launched in very thin (25 microns) polymer films to produce an oscillatory resonant device. A theoretical equation for this system is almost equal to the Sauerbrey equation used in the QCM method. Preliminary results show that a PVDF film can act has a microbalance. A film system consisting of PVDF/Immobilon-P/PVDF has been tested in the detection of proteins. Current work with this system is presented.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.230-232.491