Development of a biosensor based on a piezoelectric film

Author

Inácio, P. ; Mendes, J. N Marat ; Dias, C.J.

Author_Institution

Dep. de Ciencias dos Materiais, Seccao de Materiais Electroactivos (CENIMAT), Caparica, Portugal

fYear

2002

fDate

2002

Firstpage

287

Lastpage

290

Abstract

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. A system using a PVDF film was tested in protein detection. Results showed that the PVDF film can act has a microbalance. Currently, a new system using a PVDF/Immobilon-P/PVDF film, to be used in protein detection, is being tested. Results for the PVDF system and current work with the new system are presented.

Keywords

biosensors; microbalances; piezoelectric thin films; piezoelectric transducers; polymer films; proteins; Immobilon-P membrane; PVDF film; Sauerbrey equation; acoustic wave device; gravimetric biosensor; microbalance; oscillatory resonant device; piezoelectric film; polymer film; protein detection; Acoustic waves; Biosensors; Crystals; Equations; Piezoelectric devices; Piezoelectric films; Proteins; Surface acoustic wave devices; Surface acoustic waves; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 2002. ISE 11. Proceedings. 11th International Symposium on

Print_ISBN

0-7803-7560-2

Type

conf

DOI

10.1109/ISE.2002.1042999

Filename

1042999