RealTime Mass Sensing by Nanomechanical Resonatorsin Fluid
Citation:
Ghatkesar M. K., Barwich, V., Braun, T., Bredekamp, A.H., Drechsler, U., Despont, M., Lang, H. P., Hegner, M., Gerber Ch., RealTime Mass Sensing by Nanomechanical Resonatorsin Fluid, Proceedings of IEEE Sensors, 2, 2004, 1060 1063Download Item:
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Abstract:
We have developed a sensitive method for real-time mass sensing in a fluid using a microfabricated array of nanomechanical cantilevers actuated at their resonance frequencies. The sensor platform consists of a streptavidin layer immobilised onto gold-coated cantilevers and interacts with biotin-labeled latex beads. The addition of mass involved with this process decreased the resonance frequency. By monitoring frequency spectra of higher harmonics we measured a mass sensitivity of 3.3 Hz/pg. Our data demonstrate that the sensitivity can be increased by operating the cantilever at higher harmonics.
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National Science Foundation
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http://people.tcd.ie/hegnermDescription:
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Author: HEGNER, MARTIN
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Proceedings of IEEE Sensors2
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