Effects of spatial sensitivity on mass sensing with bulk acoustic mode resonators

Zielinski, A. T., Prasad, A. , Seshia, A. A., Kalberer, M. and Jones, R. L. (2015) Effects of spatial sensitivity on mass sensing with bulk acoustic mode resonators. Sensors and Actuators A: Physical, 236, pp. 369-379. (doi: 10.1016/j.sna.2015.11.003)

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The spatial sensitivity of bulk acoustic mode resonators can influence calibrations when they are implemented as accurate mass sensors of surface-bound particles. A new spatial sensitivity model based on images of the resonator surface is introduced from early principles. The adsorption of particles was studied empirically by repeatedly drying particle laden droplets on the surface of two 3.14 MHz bulk acoustic mode resonators. Theoretical and experimental results were compared to identify three scenarios over the course of consecutive droplet evaporation with varying spatial sensitivity influences. Examining different surface treatments for the resonators revealed the hydrophilic surface to have a higher rate of particle stacking and conglomeration.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Prasad, Dr Abhinav
Authors: Zielinski, A. T., Prasad, A., Seshia, A. A., Kalberer, M., and Jones, R. L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Sensors and Actuators A: Physical
ISSN (Online):1873-3069
Published Online:05 November 2015

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