Modelling of a Piezoelectric Polymer Film System for Biosensing Applications
Most piezoelectric gravimetric biosensors are based on quartz crystal microbalances or surface acoustic wave devices. In this paper we describe a polymer film system, made of piezoelectric polyvinylidene difluoride (PVDF) and the Immobilon-P membrane (porous PVDF), for biosensing applications. In operation a film is accommodated in a flow cell and connected to an electronic circuit, constituting an oscillatory resonant device; the output signal is its resonance frequency. This device successfully detected the binding between bovine IgG and bovine anti-IgG. Work on the modelling of this film system is presented. Two different approaches are being considered: the finite element method (FEM) and the ABCD matrices. Results comparing theoretical and experimental data are presented.
Luís Guerra ROSA and Fernanda MARGARIDO
P. Inácio et al., "Modelling of a Piezoelectric Polymer Film System for Biosensing Applications", Materials Science Forum, Vols. 636-637, pp. 1206-1211, 2010