Position and mass determination of multiple particles using cantilever based mass sensors

Søren Dohn, Silvan Schmid, Fabien Amiot, Anja Boisen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Resonant microcantilevers are highly sensitive to added masses and have the potential to be used as mass-spectrometers. However, making the detection of individual added masses quantitative requires the position determination for each added mass. We derive expressions relating the position and mass of several added particles to the resonant frequencies of a cantilever, and an identification procedure valid for particles with different masses is proposed. The identification procedure is tested by calculating positions and mass of multiple microparticles with similar mass positioned on individual microcantilevers. Excellent agreement is observed between calculated and measured positions and calculated and theoretical masses.
    Original languageEnglish
    JournalApplied Physics Letters
    Volume97
    Issue number4
    ISSN0003-6951
    DOIs
    Publication statusPublished - 2010

    Keywords

    • cantilevers
    • mass spectrometers
    • microsensors
    • particle detectors

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