% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Verbiest:877722,
      author       = {Verbiest, Gerard J. and Kirchhof, Jan N. and Sonntag, Jens
                      and Goldsche, Matthias and Khodkov, Tymofiy and Stampfer,
                      Christoph},
      title        = {{D}etecting {U}ltrasound {V}ibrations with {G}raphene
                      {R}esonators},
      journal      = {Nano letters},
      volume       = {18},
      number       = {8},
      issn         = {1530-6992},
      address      = {Washington, DC},
      publisher    = {ACS Publ.},
      reportid     = {FZJ-2020-02423},
      pages        = {5132 - 5137},
      year         = {2018},
      abstract     = {Ultrasound detection is one of the most-important
                      nondestructive subsurface characterization tools for
                      materials, the goal of which is to laterally resolve the
                      subsurface structure with nanometer or even atomic
                      resolution. In recent years, graphene resonators have
                      attracted attention for their use in loudspeakers and
                      ultrasound radios, showing their potential for realizing
                      communication systems with air-carried ultrasound. Here, we
                      show a graphene resonator that detects ultrasound vibrations
                      propagating through the substrate on which it was
                      fabricated. We ultimately achieve a resolution of ∼7 pm/
                      in ultrasound amplitude at frequencies up to 100 MHz. Thanks
                      to an extremely high nonlinearity in the mechanical
                      restoring force, the resonance frequency itself can also be
                      used for ultrasound detection. We observe a shift of 120 kHz
                      at a resonance frequency of 65 MHz for an induced vibration
                      amplitude of 100 pm with a resolution of 25 pm. Remarkably,
                      the nonlinearity also explains the generally observed
                      asymmetry in the resonance frequency tuning of the resonator
                      when it is pulled upon with an electrostatic gate. This work
                      puts forward a sensor design that fits onto an atomic force
                      microscope cantilever and therefore promises direct
                      ultrasound detection at the nanoscale for nondestructive
                      subsurface characterization.},
      cin          = {PGI-9 / JARA-FIT},
      ddc          = {660},
      cid          = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
      pnm          = {521 - Controlling Electron Charge-Based Phenomena
                      (POF3-521)},
      pid          = {G:(DE-HGF)POF3-521},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:29989827},
      UT           = {WOS:000441478300070},
      doi          = {10.1021/acs.nanolett.8b02036},
      url          = {https://juser.fz-juelich.de/record/877722},
}