Self-excited coupled cantilevers for mass sensing in viscous measurement environments

The eigenstate shift in two nearly identical and weakly coupled cantilevers provides a means to realize much higher-sensitivity mass detection compared with the eigenfrequency shift approach. We propose using self-excited oscillations for eigenstate detection without using frequency response or reso...

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Veröffentlicht in:Applied physics letters 2013-08, Vol.103 (6)
Hauptverfasser: Yabuno, Hiroshi, Seo, Yasuhiro, Kuroda, Masaharu
Format: Artikel
Sprache:eng
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Zusammenfassung:The eigenstate shift in two nearly identical and weakly coupled cantilevers provides a means to realize much higher-sensitivity mass detection compared with the eigenfrequency shift approach. We propose using self-excited oscillations for eigenstate detection without using frequency response or resonance curve normally used in conventional methods. Mass sensing thus becomes possible even in high-viscosity environments, where the peak of the frequency response curve is ambiguous or does not exist. The feedback control method is theoretically clarified to produce self-excited oscillation and the validity of the proposed method is investigated experimentally using macroscale coupled cantilevers.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4817979