Real-Time Particle Mass Spectrometry Based on Resonant Micro Strings

Silvan Schmid; Søren Dohn; Anja Boisen

doi:10.3390/s100908092

Real-Time Particle Mass Spectrometry Based on Resonant Micro Strings

Silvan Schmid, Søren Dohn, Anja Boisen

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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 of the 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 the exposure dose of airborne nanoparticles.

Original language	English
Journal	Sensors
Volume	10
Issue number	9
Pages (from-to)	8092-8100
ISSN	1424-8220
DOIs	https://doi.org/10.3390/s100908092
Publication status	Published - 2010

Bibliographical note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/.)

Keywords

particle sensor
micro beads
MEMS
mass spectrometry
string resonator
aerosol
nanoparticles
NEMS

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10.3390/s100908092

Sensors 10 08092Final published version, 7.44 MB

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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 of the 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 the exposure dose of airborne nanoparticles.",

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AB - 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 of the 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 the exposure dose of airborne nanoparticles.

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KW - micro beads

KW - MEMS

KW - mass spectrometry

KW - string resonator

KW - aerosol

KW - nanoparticles

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