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Revista Facultad de Ingeniería Universidad de Antioquia

Print version ISSN 0120-6230


MONTAGUT FERIZZOLA, Yeison Javier et al. Oscillator for Biosensors based on Quartz Crystal Microbalance (QCM). Antioquia [online]. 2011, n.61, pp.114-122. ISSN 0120-6230.

Quartz crystal is generally used in some applications as a microbalance taking advantage of its capacity to change the resonance frequency according to any surface mass change on the resonator. In this way a quartz crystal can be used as a transducer in a piezoelectric inmunosensor system in order to detect antigen-antibody bonds. An interface for Quartz Crystal Microbalances, QCM, based on an improved version of an oscillator in balanced differential configuration and its respective validation as a biosensor characterization system is introduced in this paper. The system was successfully tested in a piezoelectric inmunosensor for detecting the pesticide Carbaryl.

Keywords : Quartz Crystal Microbalance (QCM); oscillator; biosensor; piezoelectric inmunosensor; Carbaryl.

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