Document Type

Conference Proceeding



Publication Date



Institute of Electrical and Electronics Engineers (IEEE)

Source Publication

2005 IEEE Sensors Proceedings

Source ISSN


Original Item ID

doi: 10.1109/ICSENS.2005.1597687


Microcantilevers with polymer coatings hold great promise as resonant chemical sensors. It is known that the coated cantilever sensitivity increases with coating thickness; however, the drawback of increasing the coating thickness is the increase of the frequency noise and thus the deterioration of the sensor's limit of detection. In this paper, an analytical expression for the viscoelastic losses in the coating, hence the quality factor is established and is used to explain the observed increase of the frequency noise with the polymer thickness. This result is then used to demonstrate that an optimum coating thickness exists that minimise the limit of detection


Accepted version. Published as part of the proceedings of the conference, 2005 IEEE Sensors, 2005. DOI. © 2005 The Institute of Electrical and Electronics Engineers. Used with permission.

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