Special cantilever geometry for the access of higher oscillation modes in atomic force microscopy
Employing higher oscillation modes of microcantilevers promises higher sensitivity when applied as sensors, for example, for mass detection or in atomic force microscopy. Introducing a special cantilever geometry, we show that the relation between the resonance frequencies of the first and second resonance modes can be modified to separate them further or to bring them closer together. In atomic force microscopy the latter is of special interest as the photodiode of the beam deflection detection limits the accessible frequency range. Using finite element simulations, we optimized the design of the modified cantilever geometry for a maximum reduction of the frequency of the second oscillation mode with respect to the first mode. Cantilevers were fabricated by silicon micromachining and subsequently utilized in an ultrahigh vacuum Kelvin probe force microscope imaging the surface potential of C-60 on graphite. (c) 2006 American Institute of Physics.
Sadewasser, S Hahn Meitner Inst Berlin GmbH, Glienicker Str 100, D-14109 Berlin, Germany Hahn Meitner Inst Berlin GmbH, D-14109 Berlin, Germany Inst Microelect Barcelona, CSIC, CNM, Bellaterra 08193, Barcelona, Spain
Cited References Count:18
Record created on 2013-08-06, modified on 2017-02-12