Quartz resonator as sensor for viscous/conductive liquids

Josse, Fabien; Shana, Z.A.; Radtke, D.E.; Kelkar, U.R.; Haworth, Daniel T.

doi:10.1049/el:19890966

Cited by 8 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the application of QCMs to mass sensing in liquid is very limited due to the extreme reduction of quality factor (Q) and mass sensitivity in the viscoelastic medium. Although quartz resonators have been utilized as sensors in viscous and conductive liquids [5], limited solutions by use of an additional oscillator tank circuit and capacitor were required to compensate Q reduction and frequency instability. In this paper, we demonstrate an effective way to preserve high Q in liquid comparable to that in a gaseous environment through the inclusion of a thin acoustic loss isolation layer (vacuum) and a sensing diaphragm, which effectively help contain acoustic wave energy within the crystal.…”

Section: Introductionmentioning

confidence: 99%

Liquid damping isolation on quartz crystal microbalance for effective preservation of high quality factor and sensitivity in liquid

Kirkendall

Kwon

2009

2009 IEEE Sensors

View full text Add to dashboard Cite

This paper reports a novel design of a quartz crystal microbalance (QCM) for effective preservation of high quality factor and sensitivity in liquid. Many previous attempts have not achieved effective solutions to improve the QCM's performance in liquid. It is challenging to create a device without serious liquid damping effect. Our new design removes this dependence through an acoustic loss isolation layer (vacuum) and a sensing diaphragm, which reduce direct contact area at the interface between the QCM and liquid. The sensing diaphragm plays another important role of keeping the liquid damping effect at a much lower frequency than the operating frequency of the QCM. By successful isolation of the liquid damping effect from the QCM's resonance, we have successfully been able to preserve high Q in liquid. Q of 1603 in air and 1600 in water (less than 1% reduction) have been clearly observed.

show abstract

Section: Introductionmentioning

confidence: 99%