Revista Facultad de Ingeniería Universidad de Antioquia (Nov 2012)

Oscillator for Biosensors based on Quartz Crystal Microbalance (QCM)

  • Yeison Javier Montagut Ferizzola,
  • José Vicente García Narbon,
  • Yolanda Jiménez Jiménez,
  • Carmen March Iborra,
  • Angel Montoya Baides,
  • Róbinson Alberto Torres Villa,
  • Antonio Arnau Vives

DOI
https://doi.org/10.17533/udea.redin.13543
Journal volume & issue
no. 61

Abstract

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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.

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