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Biosensors Based on Cantilevers

  • Mar Álvarez
  • Laura G. Carrascosa
  • Kiril Zinoviev
  • Jose A. Plaza
  • Laura M. Lechuga
Part of the Methods in Molecular Biology™ book series (MIMB, volume 504)

Summary

Microcantilevers based-biosensors are a new label-free technique that allows the direct detection of biomolecular interactions in a label-less way and with great accuracy by translating the biointeraction into a nanomechanical motion. Low cost and reliable standard silicon technologies are widely used for the fabrication of cantilevers with well-controlled mechanical properties. Over the last years, the number of applications of these sensors has shown a fast growth in diverse fields, such as genomic or proteomic, because of the biosensor flexibility, the low sample consumption, and the non-pretreated samples required. In this chapter, we report a dedicated design and a fabrication process of highly sensitive microcantilever silicon sensors. We will describe as well an application of the device in the environmental field showing the immunodetection of an organic toxic pesticide as an example. The cantilever biofunctionalization process and the subsequent pesticide determination are detected in real time by monitoring the nanometer-scale bending of the microcantilever due to a differential surface stress generated between both surfaces of the device.

Key words

Microcantilever Nanomechanical biosensors MEMs Immunoassay Pesticide detection Surface stress Biofunctionalization Biorecognition 

Notes

Acknowledgments

The authors acknowledge to the European Union (Project Optonanogen, IST-2001-37239). Authors thank Dr. Angel Montoya (Ci2B, University of Valencia, Spain) for the inmunoreagents.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Mar Álvarez
    • 1
  • Laura G. Carrascosa
    • 1
  • Kiril Zinoviev
    • 1
  • Jose A. Plaza
    • 1
  • Laura M. Lechuga
    • 1
  1. 1.CIBER BBNInstituto de Microelectrónica de MadridMadridSpain

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