title: Real-time particle mass spectrometry based on resonant micro strings.
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.
authors.affiliation: Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Building 345 East, DK-2800 Kongens Lyngby, Denmark. silvan.schmid@nanotech.dtu.dk
authors.forename: Silvan
authors.initials: S
authors.lastname: Schmid
authors.forename: Søren
authors.initials: S
authors.lastname: Dohn
authors.forename: Anja
authors.initials: A
authors.lastname: Boisen
mesh_terms: D000327:Adsorption; D013058:Mass Spectrometry / Q000295:instrumentation* / Q000379:methods*; D055616:Microtechnology / Q000295:instrumentation* / Q000379:methods*; D008962:Models, Theoretical; D053758:Nanoparticles / Q000032:analysis; D052638:Particulate Matter / Q000032:analysis
chemical_list: D052638:Particulate Matter