Weighing graphene with QCM to monitor interfacial mass changes

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...

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Bibliographic Details
Published in:Applied physics letters 2016-08, Vol.109 (5)
Main Authors: Kakenov, Nurbek, Balci, Osman, Salihoglu, Omer, Hur, Seung Hyun, Balci, Sinan, Kocabas, Coskun
Format: Article
Language:English
Subjects:
Applied physics
Biomolecules
Density
Graphene
Microbalances
Nanotubes
Oxidation
Quartz
Quartz crystals
Resonant frequencies
Resonators
Transfer printing
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Summary: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.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4960299