Beilstein J. Nanotechnol.2018,9, 2546–2560, doi:10.3762/bjnano.9.237
Julia Korner University of Utah, 50 S. Central Campus Dr #2110, Salt Lake City, Utah, 84112, USA 10.3762/bjnano.9.237 Abstract Background: Co-resonantcoupling of a micro- and a nanocantilever can be introduced to significantly enhance the sensitivity of dynamic-mode cantilever sensors while
contribute towards extending and completing the already established theoretical basics of this novel co-resonant sensor concept and open up new ways of studying the coupled system’s behaviour.
Keywords: cantilever sensor; co-resonantcoupling; effective sensor properties; sensor sensitivity; Introduction
using Equation 4 for each resonance peak based on the derived expressions for effective sensor properties. That furthermore allows to analyze the sensitivity gain induced by the co-resonantcoupling in comparison to an individual cantilever sensor. For the exemplary values given in Table 1, the minimal
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Figure 1:
(a) Scanning electron microscopy image of a sensor realization consisting of a silicon microcantile...
Beilstein J. Nanotechnol.2016,7, 1033–1043, doi:10.3762/bjnano.7.96
technique. Ultrathin and slender cantilevers can address this challenge but lead to increased complexity of detection. We present an approach based on the co-resonantcoupling of a micro- and a nanometer-sized cantilever. Via matching of the resonance frequencies of the two subsystems we induce a strong
signal even with very small magnetic samples. On the other hand, detection becomes increasingly difficult when the size of the cantilever is reduced to dimensions on the nanoscale.
Our recently introduced sensor concept addresses these difficulties by co-resonantcoupling of a micro- and a nanocantilever
the co-resonantcoupling this changes the resonance frequencies of the coupled system and can be detected at the cantilever.
Small interactions result in rather large frequency shifts due to the low stiffness, i.e., high sensitivity of the nanoscale oscillator, and can be measured with a rather
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Figure 1:
Simple model for two coupled harmonic oscillators, each represented by a mass (m1, m2), a sping (k1...