Generalized Characteristics of Resonant Polymer-Coated Microcantilevers in Viscous Liquid Media
Format of Original
Institute of Electrical and Electronics Engineers (IEEE)
IEEE International Frequency Control Symposium, 2007 Joint with the 21st European Frequency and Time Forum
Original Item ID
Expressions describing the resonant frequency and quality factor of a dynamically-driven, polymer-coated microcantilever in a viscous liquid medium have been obtained. These generalized formulas are used to describe the effects the operational medium and the coating has on the device sensitivity when used in liquid-phase chemical sensing applications. The derived expressions are shown to reduce to well-known formulas for the case of an uncoated cantilever in an invisicid medium and the case of a coated cantilever in air. The theoretical results are compared to existing chemical sensor data in aqueous and viscous solutions.