Document Type

Conference Proceeding

Language

eng

Format of Original

6 p.

Publication Date

2010

Publisher

Elsevier

Source Publication

Procedia Engineering

Source ISSN

1877-7058

Original Item ID

doi: 10.1016/j.proeng.2010.09.283

Abstract

Microcantilevers used as (bio)chemical sensors are usually coated with a chemically sensitive layer. The coated devices operate either in a static bending regime or in a dynamic flexural mode. While the coated devices operate generally well in both the static and dynamic mode, they do suffer from certain shortcomings depending on the medium of operation and the application, including lack of selectivity and of reversibility of the sensitive coating and a reduced quality factor due to the surrounding medium. In particular, the performance of microcantilevers excited in their standard out-of-plane dynamic mode drastically decreases in viscous liquid media. Moreover, the responses of coated cantilevers operating in the static bending mode are often difficult to interpret. To resolve those performance issues, unconventional uses of microcantilever are reviewed in this paper, which consist of the use of the dynamic mode without sensitive coating, the use of in-plane (flexural and longitudinal) vibration modes in liquid media, and fully accounting for the viscoelastic effects of the coatings in the static mode of operation. The advantages and drawbacks of these unconventional uses of microcantilevers for chemical sensing in gas and liquid environments are discussed.

Comments

Published version. Published as part of the proceedings of the conference, Eurosensor XXIV Conference, 2010: 1021-1026. DOI. © Elsevier 2010.

This is an open access article published under the Creative Commons Attribution license.

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