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      Weighing graphene with QCM to monitor interfacial mass changes

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      Author(s)
      Kakenov, N.
      Balci, O.
      Salihoglu, O.
      Hur, S. H.
      Balci, S.
      Kocabas, C.
      Date
      2016
      Source Title
      Applied Physics Letters
      Print ISSN
      0003-6951
      Electronic ISSN
      1077-3118
      Publisher
      American Institute of Physics Inc.
      Volume
      109
      Issue
      5
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      In this Letter, we experimentally determined the mass density of graphene using quartz crystal microbalance (QCM) as a mechanical resonator. We developed a transfer printing technique to integrate large area single-layer graphene on QCM. By monitoring the resonant frequency of an oscillating quartz crystal loaded with graphene, we were able to measure the mass density of graphene as ∼118 ng/cm2, which is significantly larger than the ideal graphene (∼76 ng/cm2) mainly due to the presence of wrinkles and organic/inorganic residues on graphene sheets. High sensitivity of the quartz crystal resonator allowed us to determine the number of graphene layers in a particular sample. Additionally, we extended our technique to probe interfacial mass variation during adsorption of biomolecules on graphene surface and plasma-assisted oxidation of graphene.
      Keywords
      Crystal resonators
      Natural frequencies
      Quartz
      Quartz crystal microbalances
      Resonators
      Graphene layers
      Graphene sheets
      High sensitivity
      Interfacial mass
      Mechanical resonators
      Organic/inorganic
      Quartz crystal resonator
      Transfer printing
      Graphene
      Permalink
      http://hdl.handle.net/11693/36649
      Published Version (Please cite this version)
      http://dx.doi.org/10.1063/1.4960299
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      • Department of Physics 2551
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