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Sensors 2010, 10(9), 8092-8100; doi:10.3390/s100908092

Real-Time Particle Mass Spectrometry Based on Resonant Micro Strings

Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Building 345 East, DK-2800 Kongens Lyngby, Denmark
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Received: 10 July 2010 / Revised: 30 July 2010 / Accepted: 15 August 2010 / Published: 27 August 2010
(This article belongs to the Section Chemical Sensors)
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Abstract

Micro- and nanomechanical resonators are widely being used as mass sensors due to their unprecedented mass sensitivity. We present a simple closed-form expression which allows a fast and quantitative calculation of the position and mass of individual particles placed on a micro or nano string by measuring the resonant frequency shifts ofthe first two bending modes. The method has been tested by detecting the mass spectrum of micro particles placed on a micro string. This method enables real-time mass spectrometry necessary for applications such as personal monitoring devices for the assessment of theexposure dose of airborne nanoparticles.
Keywords: mass spectrometry; MEMS; NEMS; nanoparticles; string resonator; micro beads; aerosol; particle sensor mass spectrometry; MEMS; NEMS; nanoparticles; string resonator; micro beads; aerosol; particle sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Schmid, S.; Dohn, S.; Boisen, A. Real-Time Particle Mass Spectrometry Based on Resonant Micro Strings. Sensors 2010, 10, 8092-8100.

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