Energy dissipation in microfluidic beam resonators
John E Sader, Thomas P Burg, Scott R Manalis
JOURNAL OF FLUID MECHANICS | CAMBRIDGE UNIV PRESS | Published : 2010
The fluid-structure interaction of resonating microcantilevers immersed in fluid has been widely studied and is a cornerstone in nanomechanical sensor development. In many applications, fluid damping imposes severe limitations by strongly degrading the signal-to-noise ratio of measurements. Recently, Burg et al. (Nature, vol. 446, 2007, pp. 1066-1069) proposed an alternative type of microcantilever device whereby a microfluidic channel was embedded inside the cantilever with vacuum outside. Remarkably, it was observed that energy dissipation in these systems was almost identical when air or liquid was passed through the channel and was 4 orders of magnitude lower than that in conventional mi..View full abstract
This work was supported by the Institute for Collaborative Biotechnologies from the US Army Research Office, the NIH Cell Decision Process Center, and by the Australian Research Council Grants Scheme.